Fresh dep ensure

vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/metadata.yaml

@@ -14,6 +14,7 @@ tags:
 subordinate: false
 series:
   - xenial
+  - bionic
 requires:
   apiserver:
     interface: http

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-e2e/config.yaml

@@ -1,6 +1,6 @@
 options:
   channel:
     type: string
-    default: "1.10/stable"
+    default: "1.11/stable"
     description: |
       Snap channel to install Kubernetes snaps from

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-e2e/metadata.yaml

@@ -15,6 +15,7 @@ tags:
   - conformance
 series:
   - xenial
+  - bionic
 requires:
   kubernetes-master:
     interface: http

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/README.md

@@ -1,19 +1,19 @@
 # Kubernetes-master
 
-[Kubernetes](http://kubernetes.io/) is an open source system for managing 
+[Kubernetes](http://kubernetes.io/) is an open source system for managing
 application containers across a cluster of hosts. The Kubernetes project was
-started by Google in 2014, combining the experience of running production 
+started by Google in 2014, combining the experience of running production
 workloads combined with best practices from the community.
 
 The Kubernetes project defines some new terms that may be unfamiliar to users
-or operators. For more information please refer to the concept guide in the 
+or operators. For more information please refer to the concept guide in the
 [getting started guide](https://kubernetes.io/docs/home/).
 
-This charm is an encapsulation of the Kubernetes master processes and the 
+This charm is an encapsulation of the Kubernetes master processes and the
 operations to run on any cloud for the entire lifecycle of the cluster.
 
 This charm is built from other charm layers using the Juju reactive framework.
-The other layers focus on specific subset of operations making this layer 
+The other layers focus on specific subset of operations making this layer
 specific to operations of Kubernetes master processes.
 
 # Deployment
@@ -23,15 +23,15 @@ charms to model a complete Kubernetes cluster. A Kubernetes cluster needs a
 distributed key value store such as [Etcd](https://coreos.com/etcd/) and the
 kubernetes-worker charm which delivers the Kubernetes node services. A cluster
 requires a Software Defined Network (SDN) and Transport Layer Security (TLS) so
-the components in a cluster communicate securely. 
+the components in a cluster communicate securely.
 
-Please take a look at the [Canonical Distribution of Kubernetes](https://jujucharms.com/canonical-kubernetes/) 
-or the [Kubernetes core](https://jujucharms.com/kubernetes-core/) bundles for 
+Please take a look at the [Canonical Distribution of Kubernetes](https://jujucharms.com/canonical-kubernetes/)
+or the [Kubernetes core](https://jujucharms.com/kubernetes-core/) bundles for
 examples of complete models of Kubernetes clusters.
 
 # Resources
 
-The kubernetes-master charm takes advantage of the [Juju Resources](https://jujucharms.com/docs/2.0/developer-resources) 
+The kubernetes-master charm takes advantage of the [Juju Resources](https://jujucharms.com/docs/2.0/developer-resources)
 feature to deliver the Kubernetes software.
 
 In deployments on public clouds the Charm Store provides the resource to the
@@ -40,9 +40,41 @@ firewall rules may not be able to contact the Charm Store. In these network
 restricted  environments the resource can be uploaded to the model by the Juju
 operator.
 
+#### Snap Refresh
+
+The kubernetes resources used by this charm are snap packages. When not
+specified during deployment, these resources come from the public store. By
+default, the `snapd` daemon will refresh all snaps installed from the store
+four (4) times per day. A charm configuration option is provided for operators
+to control this refresh frequency.
+
+>NOTE: this is a global configuration option and will affect the refresh
+time for all snaps installed on a system.
+
+Examples:
+
+```sh
+## refresh kubernetes-master snaps every tuesday
+juju config kubernetes-master snapd_refresh="tue"
+
+## refresh snaps at 11pm on the last (5th) friday of the month
+juju config kubernetes-master snapd_refresh="fri5,23:00"
+
+## delay the refresh as long as possible
+juju config kubernetes-master snapd_refresh="max"
+
+## use the system default refresh timer
+juju config kubernetes-master snapd_refresh=""
+```
+
+For more information on the possible values for `snapd_refresh`, see the
+*refresh.timer* section in the [system options][] documentation.
+
+[system options]: https://forum.snapcraft.io/t/system-options/87
+
 # Configuration
 
-This charm supports some configuration options to set up a Kubernetes cluster 
+This charm supports some configuration options to set up a Kubernetes cluster
 that works in your environment:
 
 #### dns_domain
@@ -61,14 +93,14 @@ Enable RBAC and Node authorisation.
 # DNS for the cluster
 
 The DNS add-on allows the pods to have a DNS names in addition to IP addresses.
-The Kubernetes cluster DNS server (based off the SkyDNS library) supports 
-forward lookups (A records), service lookups (SRV records) and reverse IP 
+The Kubernetes cluster DNS server (based off the SkyDNS library) supports
+forward lookups (A records), service lookups (SRV records) and reverse IP
 address lookups (PTR records). More information about the DNS can be obtained
 from the [Kubernetes DNS admin guide](http://kubernetes.io/docs/admin/dns/).
 
 # Actions
 
-The kubernetes-master charm models a few one time operations called 
+The kubernetes-master charm models a few one time operations called
 [Juju actions](https://jujucharms.com/docs/stable/actions) that can be run by
 Juju users.
 
@@ -80,7 +112,7 @@ requires a relation to the ceph-mon charm before it can create the volume.
 
 #### restart
 
-This action restarts the master processes `kube-apiserver`, 
+This action restarts the master processes `kube-apiserver`,
 `kube-controller-manager`, and `kube-scheduler` when the user needs a restart.
 
 # More information
@@ -93,7 +125,7 @@ This action restarts the master processes `kube-apiserver`,
 # Contact
 
 The kubernetes-master charm is free and open source operations created
-by the containers team at Canonical. 
+by the containers team at Canonical.
 
 Canonical also offers enterprise support and customization services. Please
 refer to the [Kubernetes product page](https://www.ubuntu.com/cloud/kubernetes)

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/actions.yaml

@@ -1,7 +1,7 @@
 restart:
   description: Restart the Kubernetes master services on demand.
 create-rbd-pv:
-  description: Create RADOS Block Device (RDB) volume in Ceph and creates PersistentVolume.
+  description: Create RADOS Block Device (RDB) volume in Ceph and creates PersistentVolume. Note this is deprecated on Kubernetes >= 1.10 in favor of CSI, where PersistentVolumes are created dynamically to back PersistentVolumeClaims.
   params:
     name:
       type: string

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/actions/create-rbd-pv

@@ -38,6 +38,14 @@ def main():
     this script thinks the environment is 'sane' enough to provision volumes.
     '''
 
+    # k8s >= 1.10 uses CSI and doesn't directly create persistent volumes
+    if get_version('kube-apiserver') >= (1, 10):
+       print('This action is deprecated in favor of CSI creation of persistent volumes')
+       print('in Kubernetes >= 1.10. Just create the PVC and a PV will be created')
+       print('for you.')
+       action_fail('Deprecated, just create PVC.')
+       return
+
     # validate relationship pre-reqs before additional steps can be taken
     if not validate_relation():
         print('Failed ceph relationship check')
@@ -89,6 +97,23 @@ def main():
         check_call(cmd)
 
 
+def get_version(bin_name):
+    """Get the version of an installed Kubernetes binary.
+
+    :param str bin_name: Name of binary
+    :return: 3-tuple version (maj, min, patch)
+
+    Example::
+
+        >>> `get_version('kubelet')
+        (1, 6, 0)
+
+    """
+    cmd = '{} --version'.format(bin_name).split()
+    version_string = check_output(cmd).decode('utf-8')
+    return tuple(int(q) for q in re.findall("[0-9]+", version_string)[:3])
+
+
 def action_get_or_default(key):
     ''' Convenience method to manage defaults since actions dont appear to
     properly support defaults '''

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/config.yaml

@@ -1,4 +1,52 @@
 options:
+  audit-policy:
+    type: string
+    default: |
+      apiVersion: audit.k8s.io/v1beta1
+      kind: Policy
+      rules:
+      # Don't log read-only requests from the apiserver
+      - level: None
+        users: ["system:apiserver"]
+        verbs: ["get", "list", "watch"]
+      # Don't log kube-proxy watches
+      - level: None
+        users: ["system:kube-proxy"]
+        verbs: ["watch"]
+        resources:
+        - resources: ["endpoints", "services"]
+      # Don't log nodes getting their own status
+      - level: None
+        userGroups: ["system:nodes"]
+        verbs: ["get"]
+        resources:
+        - resources: ["nodes"]
+      # Don't log kube-controller-manager and kube-scheduler getting endpoints
+      - level: None
+        users: ["system:unsecured"]
+        namespaces: ["kube-system"]
+        verbs: ["get"]
+        resources:
+        - resources: ["endpoints"]
+      # Log everything else at the Request level.
+      - level: Request
+        omitStages:
+        - RequestReceived
+    description: |
+      Audit policy passed to kube-apiserver via --audit-policy-file.
+      For more info, please refer to the upstream documentation at
+      https://kubernetes.io/docs/tasks/debug-application-cluster/audit/
+  audit-webhook-config:
+    type: string
+    default: ""
+    description: |
+      Audit webhook config passed to kube-apiserver via --audit-webhook-config-file.
+      For more info, please refer to the upstream documentation at
+      https://kubernetes.io/docs/tasks/debug-application-cluster/audit/
+  addons-registry:
+    type: string
+    default: ""
+    description: Specify the docker registry to use when applying addons
   enable-dashboard-addons:
     type: boolean
     default: True
@@ -41,7 +89,7 @@ options:
       will not be loaded.
   channel:
     type: string
-    default: "1.10/stable"
+    default: "1.11/stable"
     description: |
       Snap channel to install Kubernetes master services from
   client_password:
@@ -99,3 +147,18 @@ options:
     default: true
     description: |
       If true the metrics server for Kubernetes will be deployed onto the cluster.
+  snapd_refresh:
+    default: "max"
+    type: string
+    description: |
+      How often snapd handles updates for installed snaps. Setting an empty
+      string will check 4x per day. Set to "max" to delay the refresh as long
+      as possible. You may also set a custom string as described in the
+      'refresh.timer' section here:
+        https://forum.snapcraft.io/t/system-options/87
+  default-storage:
+    type: string
+    default: "auto"
+    description: |
+      The storage class to make the default storage class. Allowed values are "auto",
+      "none", "ceph-xfs", "ceph-ext4". Note: Only works in Kubernetes >= 1.10

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/layer.yaml

@@ -15,8 +15,11 @@ includes:
   - 'interface:kube-dns'
   - 'interface:kube-control'
   - 'interface:public-address'
-  - 'interface:aws'
-  - 'interface:gcp'
+  - 'interface:aws-integration'
+  - 'interface:gcp-integration'
+  - 'interface:openstack-integration'
+  - 'interface:vsphere-integration'
+  - 'interface:azure-integration'
 options:
   basic:
     packages:

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/metadata.yaml

@@ -20,6 +20,7 @@ tags:
 subordinate: false
 series:
   - xenial
+  - bionic
 provides:
   kube-api-endpoint:
     interface: http
@@ -41,9 +42,15 @@ requires:
   ceph-storage:
     interface: ceph-admin
   aws:
-    interface: aws
+    interface: aws-integration
   gcp:
-    interface: gcp
+    interface: gcp-integration
+  openstack:
+    interface: openstack-integration
+  vsphere:
+    interface: vsphere-integration
+  azure:
+    interface: azure-integration
 resources:
   kubectl:
     type: file

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-master/reactive/kubernetes_master.py

@@ -15,6 +15,7 @@
 # limitations under the License.
 
 import base64
+import hashlib
 import os
 import re
 import random
@@ -27,6 +28,7 @@ import ipaddress
 from charms.leadership import leader_get, leader_set
 
 from shutil import move
+from tempfile import TemporaryDirectory
 
 from pathlib import Path
 from shlex import split
@@ -64,8 +66,11 @@ from charmhelpers.contrib.charmsupport import nrpe
 nrpe.Check.shortname_re = '[\.A-Za-z0-9-_]+$'
 
 gcp_creds_env_key = 'GOOGLE_APPLICATION_CREDENTIALS'
+snap_resources = ['kubectl', 'kube-apiserver', 'kube-controller-manager',
+                  'kube-scheduler', 'cdk-addons']
 
 os.environ['PATH'] += os.pathsep + os.path.join(os.sep, 'snap', 'bin')
+db = unitdata.kv()
 
 
 def set_upgrade_needed(forced=False):
@@ -86,7 +91,6 @@ def channel_changed():
 
 def service_cidr():
     ''' Return the charm's service-cidr config '''
-    db = unitdata.kv()
     frozen_cidr = db.get('kubernetes-master.service-cidr')
     return frozen_cidr or hookenv.config('service-cidr')
 
@@ -94,7 +98,6 @@ def service_cidr():
 def freeze_service_cidr():
     ''' Freeze the service CIDR. Once the apiserver has started, we can no
     longer safely change this value. '''
-    db = unitdata.kv()
     db.set('kubernetes-master.service-cidr', service_cidr())
 
 
@@ -103,14 +106,21 @@ def check_for_upgrade_needed():
     '''An upgrade charm event was triggered by Juju, react to that here.'''
     hookenv.status_set('maintenance', 'Checking resources')
 
+    # migrate to new flags
+    if is_state('kubernetes-master.restarted-for-cloud'):
+        remove_state('kubernetes-master.restarted-for-cloud')
+        set_state('kubernetes-master.cloud.ready')
+    if is_state('kubernetes-master.cloud-request-sent'):
+        # minor change, just for consistency
+        remove_state('kubernetes-master.cloud-request-sent')
+        set_state('kubernetes-master.cloud.request-sent')
+
     migrate_from_pre_snaps()
     add_rbac_roles()
     set_state('reconfigure.authentication.setup')
     remove_state('authentication.setup')
-    changed = snap_resources_changed()
-    if changed == 'yes':
-        set_upgrade_needed()
-    elif changed == 'unknown':
+
+    if not db.get('snap.resources.fingerprint.initialised'):
         # We are here on an upgrade from non-rolling master
         # Since this upgrade might also include resource updates eg
         # juju upgrade-charm kubernetes-master --resource kube-any=my.snap
@@ -118,6 +128,9 @@ def check_for_upgrade_needed():
         # Forcibly means we do not prompt the user to call the upgrade action.
         set_upgrade_needed(forced=True)
 
+    migrate_resource_checksums()
+    check_resources_for_upgrade_needed()
+
     # Set the auto storage backend to etcd2.
     auto_storage_backend = leader_get('auto_storage_backend')
     is_leader = is_state('leadership.is_leader')
@@ -125,27 +138,56 @@ def check_for_upgrade_needed():
         leader_set(auto_storage_backend='etcd2')
 
 
-def snap_resources_changed():
-    '''
-    Check if the snapped resources have changed. The first time this method is
-    called will report "unknown".
+def get_resource_checksum_db_key(resource):
+    ''' Convert a resource name to a resource checksum database key. '''
+    return 'kubernetes-master.resource-checksums.' + resource
 
-    Returns: "yes" in case a snap resource file has changed,
-             "no" in case a snap resources are the same as last call,
-             "unknown" if it is the first time this method is called
 
-    '''
-    db = unitdata.kv()
-    resources = ['kubectl', 'kube-apiserver', 'kube-controller-manager',
-                 'kube-scheduler', 'cdk-addons']
-    paths = [hookenv.resource_get(resource) for resource in resources]
-    if db.get('snap.resources.fingerprint.initialised'):
-        result = 'yes' if any_file_changed(paths) else 'no'
-        return result
-    else:
-        db.set('snap.resources.fingerprint.initialised', True)
-        any_file_changed(paths)
-        return 'unknown'
+def calculate_resource_checksum(resource):
+    ''' Calculate a checksum for a resource '''
+    md5 = hashlib.md5()
+    path = hookenv.resource_get(resource)
+    if path:
+        with open(path, 'rb') as f:
+            data = f.read()
+        md5.update(data)
+    return md5.hexdigest()
+
+
+def migrate_resource_checksums():
+    ''' Migrate resource checksums from the old schema to the new one '''
+    for resource in snap_resources:
+        new_key = get_resource_checksum_db_key(resource)
+        if not db.get(new_key):
+            path = hookenv.resource_get(resource)
+            if path:
+                # old key from charms.reactive.helpers.any_file_changed
+                old_key = 'reactive.files_changed.' + path
+                old_checksum = db.get(old_key)
+                db.set(new_key, old_checksum)
+            else:
+                # No resource is attached. Previously, this meant no checksum
+                # would be calculated and stored. But now we calculate it as if
+                # it is a 0-byte resource, so let's go ahead and do that.
+                zero_checksum = hashlib.md5().hexdigest()
+                db.set(new_key, zero_checksum)
+
+
+def check_resources_for_upgrade_needed():
+    hookenv.status_set('maintenance', 'Checking resources')
+    for resource in snap_resources:
+        key = get_resource_checksum_db_key(resource)
+        old_checksum = db.get(key)
+        new_checksum = calculate_resource_checksum(resource)
+        if new_checksum != old_checksum:
+            set_upgrade_needed()
+
+
+def calculate_and_store_resource_checksums():
+    for resource in snap_resources:
+        key = get_resource_checksum_db_key(resource)
+        checksum = calculate_resource_checksum(resource)
+        db.set(key, checksum)
 
 
 def add_rbac_roles():
@@ -253,7 +295,8 @@ def install_snaps():
     snap.install('kube-scheduler', channel=channel)
     hookenv.status_set('maintenance', 'Installing cdk-addons snap')
     snap.install('cdk-addons', channel=channel)
-    snap_resources_changed()
+    calculate_and_store_resource_checksums()
+    db.set('snap.resources.fingerprint.initialised', True)
     set_state('kubernetes-master.snaps.installed')
     remove_state('kubernetes-master.components.started')
 
@@ -393,15 +436,76 @@ def set_app_version():
     hookenv.application_version_set(version.split(b' v')[-1].rstrip())
 
 
+@when('kubernetes-master.snaps.installed')
+@when('snap.refresh.set')
+@when('leadership.is_leader')
+def process_snapd_timer():
+    ''' Set the snapd refresh timer on the leader so all cluster members
+    (present and future) will refresh near the same time. '''
+    # Get the current snapd refresh timer; we know layer-snap has set this
+    # when the 'snap.refresh.set' flag is present.
+    timer = snap.get(snapname='core', key='refresh.timer').decode('utf-8')
+
+    # The first time through, data_changed will be true. Subsequent calls
+    # should only update leader data if something changed.
+    if data_changed('master_snapd_refresh', timer):
+        hookenv.log('setting snapd_refresh timer to: {}'.format(timer))
+        leader_set({'snapd_refresh': timer})
+
+
+@when('kubernetes-master.snaps.installed')
+@when('snap.refresh.set')
+@when('leadership.changed.snapd_refresh')
+@when_not('leadership.is_leader')
+def set_snapd_timer():
+    ''' Set the snapd refresh.timer on non-leader cluster members. '''
+    # NB: This method should only be run when 'snap.refresh.set' is present.
+    # Layer-snap will always set a core refresh.timer, which may not be the
+    # same as our leader. Gating with 'snap.refresh.set' ensures layer-snap
+    # has finished and we are free to set our config to the leader's timer.
+    timer = leader_get('snapd_refresh')
+    hookenv.log('setting snapd_refresh timer to: {}'.format(timer))
+    snap.set_refresh_timer(timer)
+
+
 @hookenv.atexit
 def set_final_status():
     ''' Set the final status of the charm as we leave hook execution '''
+    try:
+        goal_state = hookenv.goal_state()
+    except NotImplementedError:
+        goal_state = {}
+
+    vsphere_joined = is_state('endpoint.vsphere.joined')
+    azure_joined = is_state('endpoint.azure.joined')
+    cloud_blocked = is_state('kubernetes-master.cloud.blocked')
+    if vsphere_joined and cloud_blocked:
+        hookenv.status_set('blocked',
+                           'vSphere integration requires K8s 1.12 or greater')
+        return
+    if azure_joined and cloud_blocked:
+        hookenv.status_set('blocked',
+                           'Azure integration requires K8s 1.11 or greater')
+        return
+
+    if is_state('kubernetes-master.cloud.pending'):
+        hookenv.status_set('waiting', 'Waiting for cloud integration')
+        return
+
     if not is_state('kube-api-endpoint.available'):
-        hookenv.status_set('blocked', 'Waiting for kube-api-endpoint relation')
+        if 'kube-api-endpoint' in goal_state.get('relations', {}):
+            status = 'waiting'
+        else:
+            status = 'blocked'
+        hookenv.status_set(status, 'Waiting for kube-api-endpoint relation')
         return
 
     if not is_state('kube-control.connected'):
-        hookenv.status_set('blocked', 'Waiting for workers.')
+        if 'kube-control' in goal_state.get('relations', {}):
+            status = 'waiting'
+        else:
+            status = 'blocked'
+        hookenv.status_set(status, 'Waiting for workers.')
         return
 
     upgrade_needed = is_state('kubernetes-master.upgrade-needed')
@@ -431,12 +535,6 @@ def set_final_status():
         hookenv.status_set('waiting', 'Waiting to retry addon deployment')
         return
 
-    req_sent = is_state('kubernetes-master.cloud-request-sent')
-    aws_ready = is_state('endpoint.aws.ready')
-    gcp_ready = is_state('endpoint.gcp.ready')
-    if req_sent and not (aws_ready or gcp_ready):
-        hookenv.status_set('waiting', 'waiting for cloud integration')
-
     if addons_configured and not all_kube_system_pods_running():
         hookenv.status_set('waiting', 'Waiting for kube-system pods to start')
         return
@@ -474,7 +572,9 @@ def master_services_down():
 @when('etcd.available', 'tls_client.server.certificate.saved',
       'authentication.setup')
 @when('leadership.set.auto_storage_backend')
-@when_not('kubernetes-master.components.started')
+@when_not('kubernetes-master.components.started',
+          'kubernetes-master.cloud.pending',
+          'kubernetes-master.cloud.blocked')
 def start_master(etcd):
     '''Run the Kubernetes master components.'''
     hookenv.status_set('maintenance',
@@ -491,7 +591,7 @@ def start_master(etcd):
     handle_etcd_relation(etcd)
 
     # Add CLI options to all components
-    configure_apiserver(etcd.get_connection_string(), getStorageBackend())
+    configure_apiserver(etcd.get_connection_string())
     configure_controller_manager()
     configure_scheduler()
     set_state('kubernetes-master.components.started')
@@ -661,7 +761,8 @@ def kick_api_server(tls):
     tls_client.reset_certificate_write_flag('server')
 
 
-@when('kubernetes-master.components.started')
+@when_any('kubernetes-master.components.started', 'ceph-storage.configured')
+@when('leadership.is_leader')
 def configure_cdk_addons():
     ''' Configure CDK addons '''
     remove_state('cdk-addons.configured')
@@ -669,17 +770,39 @@ def configure_cdk_addons():
     gpuEnable = (get_version('kube-apiserver') >= (1, 9) and
                  load_gpu_plugin == "auto" and
                  is_state('kubernetes-master.gpu.enabled'))
+    registry = hookenv.config('addons-registry')
     dbEnabled = str(hookenv.config('enable-dashboard-addons')).lower()
     dnsEnabled = str(hookenv.config('enable-kube-dns')).lower()
     metricsEnabled = str(hookenv.config('enable-metrics')).lower()
+    if (is_state('ceph-storage.configured') and
+            get_version('kube-apiserver') >= (1, 10)):
+        cephEnabled = "true"
+    else:
+        cephEnabled = "false"
+    ceph_ep = endpoint_from_flag('ceph-storage.available')
+    ceph = {}
+    default_storage = ''
+    if ceph_ep:
+        b64_ceph_key = base64.b64encode(ceph_ep.key().encode('utf-8'))
+        ceph['admin_key'] = b64_ceph_key.decode('ascii')
+        ceph['kubernetes_key'] = b64_ceph_key.decode('ascii')
+        ceph['mon_hosts'] = ceph_ep.mon_hosts()
+        default_storage = hookenv.config('default-storage')
+
     args = [
         'arch=' + arch(),
         'dns-ip=' + get_deprecated_dns_ip(),
         'dns-domain=' + hookenv.config('dns_domain'),
+        'registry=' + registry,
         'enable-dashboard=' + dbEnabled,
         'enable-kube-dns=' + dnsEnabled,
         'enable-metrics=' + metricsEnabled,
-        'enable-gpu=' + str(gpuEnable).lower()
+        'enable-gpu=' + str(gpuEnable).lower(),
+        'enable-ceph=' + cephEnabled,
+        'ceph-admin-key=' + (ceph.get('admin_key', '')),
+        'ceph-kubernetes-key=' + (ceph.get('admin_key', '')),
+        'ceph-mon-hosts="' + (ceph.get('mon_hosts', '')) + '"',
+        'default-storage=' + default_storage,
     ]
     check_call(['snap', 'set', 'cdk-addons'] + args)
     if not addons_ready():
@@ -754,6 +877,15 @@ def ceph_storage(ceph_admin):
     configuration, and the ceph secret key file used for authentication.
     This method will install the client package, and render the requisit files
     in order to consume the ceph-storage relation.'''
+
+    # deprecated in 1.10 in favor of using CSI
+    if get_version('kube-apiserver') >= (1, 10):
+        # this is actually false, but by setting this flag we won't keep
+        # running this function for no reason. Also note that we watch this
+        # flag to run cdk-addons.apply.
+        set_state('ceph-storage.configured')
+        return
+
     ceph_context = {
         'mon_hosts': ceph_admin.mon_hosts(),
         'fsid': ceph_admin.fsid(),
@@ -888,13 +1020,14 @@ def on_config_allow_privileged_change():
     remove_state('config.changed.allow-privileged')
 
 
-@when('config.changed.api-extra-args')
+@when_any('config.changed.api-extra-args',
+          'config.changed.audit-policy',
+          'config.changed.audit-webhook-config')
 @when('kubernetes-master.components.started')
 @when('leadership.set.auto_storage_backend')
 @when('etcd.available')
-def on_config_api_extra_args_change(etcd):
-    configure_apiserver(etcd.get_connection_string(),
-                        getStorageBackend())
+def reconfigure_apiserver(etcd):
+    configure_apiserver(etcd.get_connection_string())
 
 
 @when('config.changed.controller-manager-extra-args')
@@ -1105,8 +1238,6 @@ def parse_extra_args(config_key):
 
 
 def configure_kubernetes_service(service, base_args, extra_args_key):
-    db = unitdata.kv()
-
     prev_args_key = 'kubernetes-master.prev_args.' + service
     prev_args = db.get(prev_args_key) or {}
 
@@ -1128,7 +1259,20 @@ def configure_kubernetes_service(service, base_args, extra_args_key):
     db.set(prev_args_key, args)
 
 
-def configure_apiserver(etcd_connection_string, leader_etcd_version):
+def remove_if_exists(path):
+    try:
+        os.remove(path)
+    except FileNotFoundError:
+        pass
+
+
+def write_audit_config_file(path, contents):
+    with open(path, 'w') as f:
+        header = '# Autogenerated by kubernetes-master charm'
+        f.write(header + '\n' + contents)
+
+
+def configure_apiserver(etcd_connection_string):
     api_opts = {}
 
     # Get the tls paths from the layer data.
@@ -1166,8 +1310,9 @@ def configure_apiserver(etcd_connection_string, leader_etcd_version):
     api_opts['logtostderr'] = 'true'
     api_opts['insecure-bind-address'] = '127.0.0.1'
     api_opts['insecure-port'] = '8080'
-    api_opts['storage-backend'] = leader_etcd_version
+    api_opts['storage-backend'] = getStorageBackend()
     api_opts['basic-auth-file'] = '/root/cdk/basic_auth.csv'
+
     api_opts['token-auth-file'] = '/root/cdk/known_tokens.csv'
     api_opts['service-account-key-file'] = '/root/cdk/serviceaccount.key'
     api_opts['kubelet-preferred-address-types'] = \
@@ -1185,7 +1330,6 @@ def configure_apiserver(etcd_connection_string, leader_etcd_version):
     api_opts['etcd-servers'] = etcd_connection_string
 
     admission_control_pre_1_9 = [
-        'Initializers',
         'NamespaceLifecycle',
         'LimitRanger',
         'ServiceAccount',
@@ -1215,9 +1359,6 @@ def configure_apiserver(etcd_connection_string, leader_etcd_version):
     if kube_version < (1, 6):
         hookenv.log('Removing DefaultTolerationSeconds from admission-control')
         admission_control_pre_1_9.remove('DefaultTolerationSeconds')
-    if kube_version < (1, 7):
-        hookenv.log('Removing Initializers from admission-control')
-        admission_control_pre_1_9.remove('Initializers')
     if kube_version < (1, 9):
         api_opts['admission-control'] = ','.join(admission_control_pre_1_9)
     else:
@@ -1241,6 +1382,44 @@ def configure_apiserver(etcd_connection_string, leader_etcd_version):
         cloud_config_path = _cloud_config_path('kube-apiserver')
         api_opts['cloud-provider'] = 'gce'
         api_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.openstack.ready'):
+        cloud_config_path = _cloud_config_path('kube-apiserver')
+        api_opts['cloud-provider'] = 'openstack'
+        api_opts['cloud-config'] = str(cloud_config_path)
+    elif (is_state('endpoint.vsphere.ready') and
+          get_version('kube-apiserver') >= (1, 12)):
+        cloud_config_path = _cloud_config_path('kube-apiserver')
+        api_opts['cloud-provider'] = 'vsphere'
+        api_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.azure.ready'):
+        cloud_config_path = _cloud_config_path('kube-apiserver')
+        api_opts['cloud-provider'] = 'azure'
+        api_opts['cloud-config'] = str(cloud_config_path)
+
+    audit_root = '/root/cdk/audit'
+    os.makedirs(audit_root, exist_ok=True)
+
+    audit_log_path = audit_root + '/audit.log'
+    api_opts['audit-log-path'] = audit_log_path
+    api_opts['audit-log-maxsize'] = '100'
+    api_opts['audit-log-maxbackup'] = '9'
+
+    audit_policy_path = audit_root + '/audit-policy.yaml'
+    audit_policy = hookenv.config('audit-policy')
+    if audit_policy:
+        write_audit_config_file(audit_policy_path, audit_policy)
+        api_opts['audit-policy-file'] = audit_policy_path
+    else:
+        remove_if_exists(audit_policy_path)
+
+    audit_webhook_config_path = audit_root + '/audit-webhook-config.yaml'
+    audit_webhook_config = hookenv.config('audit-webhook-config')
+    if audit_webhook_config:
+        write_audit_config_file(audit_webhook_config_path,
+                                audit_webhook_config)
+        api_opts['audit-webhook-config-file'] = audit_webhook_config_path
+    else:
+        remove_if_exists(audit_webhook_config_path)
 
     configure_kubernetes_service('kube-apiserver', api_opts, 'api-extra-args')
     restart_apiserver()
@@ -1269,6 +1448,19 @@ def configure_controller_manager():
         cloud_config_path = _cloud_config_path('kube-controller-manager')
         controller_opts['cloud-provider'] = 'gce'
         controller_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.openstack.ready'):
+        cloud_config_path = _cloud_config_path('kube-controller-manager')
+        controller_opts['cloud-provider'] = 'openstack'
+        controller_opts['cloud-config'] = str(cloud_config_path)
+    elif (is_state('endpoint.vsphere.ready') and
+          get_version('kube-apiserver') >= (1, 12)):
+        cloud_config_path = _cloud_config_path('kube-controller-manager')
+        controller_opts['cloud-provider'] = 'vsphere'
+        controller_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.azure.ready'):
+        cloud_config_path = _cloud_config_path('kube-controller-manager')
+        controller_opts['cloud-provider'] = 'azure'
+        controller_opts['cloud-config'] = str(cloud_config_path)
 
     configure_kubernetes_service('kube-controller-manager', controller_opts,
                                  'controller-manager-extra-args')
@@ -1347,7 +1539,6 @@ def set_token(password, save_salt):
 
     param: password - the password to be stored
     param: save_salt - the key to store the value of the token.'''
-    db = unitdata.kv()
     db.set(save_salt, password)
     return db.get(save_salt)
 
@@ -1496,9 +1687,29 @@ def clear_cluster_tag_sent():
 
 
 @when_any('endpoint.aws.joined',
-          'endpoint.gcp.joined')
+          'endpoint.gcp.joined',
+          'endpoint.openstack.joined',
+          'endpoint.vsphere.joined',
+          'endpoint.azure.joined')
+@when_not('kubernetes-master.cloud.ready')
+def set_cloud_pending():
+    k8s_version = get_version('kube-apiserver')
+    k8s_1_11 = k8s_version >= (1, 11)
+    k8s_1_12 = k8s_version >= (1, 12)
+    vsphere_joined = is_state('endpoint.vsphere.joined')
+    azure_joined = is_state('endpoint.azure.joined')
+    if (vsphere_joined and not k8s_1_12) or (azure_joined and not k8s_1_11):
+        set_state('kubernetes-master.cloud.blocked')
+    else:
+        remove_state('kubernetes-master.cloud.blocked')
+    set_state('kubernetes-master.cloud.pending')
+
+
+@when_any('endpoint.aws.joined',
+          'endpoint.gcp.joined',
+          'endpoint.azure.joined')
 @when('leadership.set.cluster_tag')
-@when_not('kubernetes-master.cloud-request-sent')
+@when_not('kubernetes-master.cloud.request-sent')
 def request_integration():
     hookenv.status_set('maintenance', 'requesting cloud integration')
     cluster_tag = leader_get('cluster_tag')
@@ -1524,28 +1735,55 @@ def request_integration():
         })
         cloud.enable_object_storage_management()
         cloud.enable_security_management()
+    elif is_state('endpoint.azure.joined'):
+        cloud = endpoint_from_flag('endpoint.azure.joined')
+        cloud.tag_instance({
+            'k8s-io-cluster-name': cluster_tag,
+            'k8s-io-role-master': 'master',
+        })
+        cloud.enable_object_storage_management()
+        cloud.enable_security_management()
     cloud.enable_instance_inspection()
     cloud.enable_network_management()
     cloud.enable_dns_management()
     cloud.enable_block_storage_management()
-    set_state('kubernetes-master.cloud-request-sent')
+    set_state('kubernetes-master.cloud.request-sent')
 
 
 @when_none('endpoint.aws.joined',
-           'endpoint.gcp.joined')
-@when('kubernetes-master.cloud-request-sent')
-def clear_requested_integration():
-    remove_state('kubernetes-master.cloud-request-sent')
+           'endpoint.gcp.joined',
+           'endpoint.openstack.joined',
+           'endpoint.vsphere.joined',
+           'endpoint.azure.joined')
+def clear_cloud_flags():
+    remove_state('kubernetes-master.cloud.pending')
+    remove_state('kubernetes-master.cloud.request-sent')
+    remove_state('kubernetes-master.cloud.blocked')
+    remove_state('kubernetes-master.cloud.ready')
 
 
 @when_any('endpoint.aws.ready',
-          'endpoint.gcp.ready')
-@when_not('kubernetes-master.restarted-for-cloud')
-def restart_for_cloud():
+          'endpoint.gcp.ready',
+          'endpoint.openstack.ready',
+          'endpoint.vsphere.ready',
+          'endpoint.azure.ready')
+@when_not('kubernetes-master.cloud.blocked',
+          'kubernetes-master.cloud.ready')
+def cloud_ready():
     if is_state('endpoint.gcp.ready'):
         _write_gcp_snap_config('kube-apiserver')
         _write_gcp_snap_config('kube-controller-manager')
-    set_state('kubernetes-master.restarted-for-cloud')
+    elif is_state('endpoint.openstack.ready'):
+        _write_openstack_snap_config('kube-apiserver')
+        _write_openstack_snap_config('kube-controller-manager')
+    elif is_state('endpoint.vsphere.ready'):
+        _write_vsphere_snap_config('kube-apiserver')
+        _write_vsphere_snap_config('kube-controller-manager')
+    elif is_state('endpoint.azure.ready'):
+        _write_azure_snap_config('kube-apiserver')
+        _write_azure_snap_config('kube-controller-manager')
+    remove_state('kubernetes-master.cloud.pending')
+    set_state('kubernetes-master.cloud.ready')
     remove_state('kubernetes-master.components.started')  # force restart
 
 
@@ -1565,6 +1803,10 @@ def _daemon_env_path(component):
     return _snap_common_path(component) / 'environment'
 
 
+def _cdk_addons_template_path():
+    return Path('/snap/cdk-addons/current/templates')
+
+
 def _write_gcp_snap_config(component):
     # gcp requires additional credentials setup
     gcp = endpoint_from_flag('endpoint.gcp.ready')
@@ -1592,3 +1834,70 @@ def _write_gcp_snap_config(component):
         daemon_env += '{}={}\n'.format(gcp_creds_env_key, creds_path)
         daemon_env_path.parent.mkdir(parents=True, exist_ok=True)
         daemon_env_path.write_text(daemon_env)
+
+
+def _write_openstack_snap_config(component):
+    # openstack requires additional credentials setup
+    openstack = endpoint_from_flag('endpoint.openstack.ready')
+
+    cloud_config_path = _cloud_config_path(component)
+    cloud_config_path.write_text('\n'.join([
+        '[Global]',
+        'auth-url = {}'.format(openstack.auth_url),
+        'username = {}'.format(openstack.username),
+        'password = {}'.format(openstack.password),
+        'tenant-name = {}'.format(openstack.project_name),
+        'domain-name = {}'.format(openstack.user_domain_name),
+    ]))
+
+
+def _write_vsphere_snap_config(component):
+    # vsphere requires additional cloud config
+    vsphere = endpoint_from_flag('endpoint.vsphere.ready')
+
+    # NB: vsphere provider will ask kube-apiserver and -controller-manager to
+    # find a uuid from sysfs unless a global config value is set. Our strict
+    # snaps cannot read sysfs, so let's do it in the charm. An invalid uuid is
+    # not fatal for storage, but it will muddy the logs; try to get it right.
+    uuid_file = '/sys/class/dmi/id/product_uuid'
+    try:
+        with open(uuid_file, 'r') as f:
+            uuid = f.read().strip()
+    except IOError as err:
+        hookenv.log("Unable to read UUID from sysfs: {}".format(err))
+        uuid = 'UNKNOWN'
+
+    cloud_config_path = _cloud_config_path(component)
+    cloud_config_path.write_text('\n'.join([
+        '[Global]',
+        'insecure-flag = true',
+        'datacenters = "{}"'.format(vsphere.datacenter),
+        'vm-uuid = "VMware-{}"'.format(uuid),
+        '[VirtualCenter "{}"]'.format(vsphere.vsphere_ip),
+        'user = {}'.format(vsphere.user),
+        'password = {}'.format(vsphere.password),
+        '[Workspace]',
+        'server = {}'.format(vsphere.vsphere_ip),
+        'datacenter = "{}"'.format(vsphere.datacenter),
+        'default-datastore = "{}"'.format(vsphere.datastore),
+        'folder = "kubernetes"',
+        'resourcepool-path = ""',
+        '[Disk]',
+        'scsicontrollertype = "pvscsi"',
+    ]))
+
+
+def _write_azure_snap_config(component):
+    azure = endpoint_from_flag('endpoint.azure.ready')
+    cloud_config_path = _cloud_config_path(component)
+    cloud_config_path.write_text(json.dumps({
+        'useInstanceMetadata': True,
+        'useManagedIdentityExtension': True,
+        'subscriptionId': azure.subscription_id,
+        'resourceGroup': azure.resource_group,
+        'location': azure.resource_group_location,
+        'vnetName': azure.vnet_name,
+        'vnetResourceGroup': azure.vnet_resource_group,
+        'subnetName': azure.subnet_name,
+        'securityGroupName': azure.security_group_name,
+    }))

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/README.md

@@ -27,6 +27,38 @@ To add additional compute capacity to your Kubernetes workers, you may
 join any related kubernetes-master, and enlist themselves as ready once the
 deployment is complete.
 
+## Snap Configuration
+
+The kubernetes resources used by this charm are snap packages. When not
+specified during deployment, these resources come from the public store. By
+default, the `snapd` daemon will refresh all snaps installed from the store
+four (4) times per day. A charm configuration option is provided for operators
+to control this refresh frequency.
+
+>NOTE: this is a global configuration option and will affect the refresh
+time for all snaps installed on a system.
+
+Examples:
+
+```sh
+## refresh kubernetes-worker snaps every tuesday
+juju config kubernetes-worker snapd_refresh="tue"
+
+## refresh snaps at 11pm on the last (5th) friday of the month
+juju config kubernetes-worker snapd_refresh="fri5,23:00"
+
+## delay the refresh as long as possible
+juju config kubernetes-worker snapd_refresh="max"
+
+## use the system default refresh timer
+juju config kubernetes-worker snapd_refresh=""
+```
+
+For more information on the possible values for `snapd_refresh`, see the
+*refresh.timer* section in the [system options][] documentation.
+
+[system options]: https://forum.snapcraft.io/t/system-options/87
+
 ## Operational actions
 
 The kubernetes-worker charm supports the following Operational Actions:
@@ -89,7 +121,7 @@ service is not reachable.
 Note: When debugging connection issues with NodePort services, its important
 to first check the kube-proxy service on the worker units. If kube-proxy is not
 running, the associated port-mapping will not be configured in the iptables
-rulechains. 
+rulechains.
 
 If you need to close the NodePort once a workload has been terminated, you can
 follow the same steps inversely.
@@ -97,4 +129,3 @@ follow the same steps inversely.
 ```
 juju run --application kubernetes-worker close-port 30510
 ```
-

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/config.yaml

@@ -13,16 +13,17 @@ options:
       cluster. Declare node labels in key=value format, separated by spaces.
   allow-privileged:
     type: string
-    default: "auto"
+    default: "true"
     description: |
       Allow privileged containers to run on worker nodes. Supported values are
       "true", "false", and "auto". If "true", kubelet will run in privileged
       mode by default. If "false", kubelet will never run in privileged mode.
       If "auto", kubelet will not run in privileged mode by default, but will
-      switch to privileged mode if gpu hardware is detected.
+      switch to privileged mode if gpu hardware is detected. Pod security
+      policies (PSP) should be used to restrict container privileges.
   channel:
     type: string
-    default: "1.10/stable"
+    default: "1.11/stable"
     description: |
       Snap channel to install Kubernetes worker services from
   require-manual-upgrade:
@@ -58,6 +59,15 @@ options:
 
       The value for this config must be a JSON array of credential objects, like this:
         [{"server": "my.registry", "username": "myUser", "password": "myPass"}]
+  ingress-ssl-chain-completion:
+    type: boolean
+    default: false
+    description: |
+      Enable chain completion for TLS certificates used by the nginx ingress
+      controller.  Set this to true if you would like the ingress controller
+      to attempt auto-retrieval of intermediate certificates.  The default
+      (false) is recommended for all production kubernetes installations, and
+      any environment which does not have outbound Internet access.
   nginx-image:
     type: string
     default: "auto"
@@ -70,3 +80,29 @@ options:
     description: |
       Docker image to use for the default backend. Auto will select an image
       based on architecture.
+  snapd_refresh:
+    default: "max"
+    type: string
+    description: |
+      How often snapd handles updates for installed snaps. Setting an empty
+      string will check 4x per day. Set to "max" to delay the refresh as long
+      as possible. You may also set a custom string as described in the
+      'refresh.timer' section here:
+        https://forum.snapcraft.io/t/system-options/87
+  kubelet-extra-config:
+    default: "{}"
+    type: string
+    description: |
+      Extra configuration to be passed to kubelet. Any values specified in this
+      config will be merged into a KubeletConfiguration file that is passed to
+      the kubelet service via the --config flag. This can be used to override
+      values provided by the charm.
+
+      Requires Kubernetes 1.10+.
+
+      The value for this config must be a YAML mapping that can be safely
+      merged with a KubeletConfiguration file. For example:
+        {evictionHard: {memory.available: 200Mi}}
+
+      For more information about KubeletConfiguration, see upstream docs:
+      https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/layer.yaml

@@ -3,6 +3,7 @@ includes:
   - 'layer:basic'
   - 'layer:debug'
   - 'layer:snap'
+  - 'layer:leadership'
   - 'layer:docker'
   - 'layer:metrics'
   - 'layer:nagios'
@@ -12,8 +13,11 @@ includes:
   - 'interface:kubernetes-cni'
   - 'interface:kube-dns'
   - 'interface:kube-control'
-  - 'interface:aws'
-  - 'interface:gcp'
+  - 'interface:aws-integration'
+  - 'interface:gcp-integration'
+  - 'interface:openstack-integration'
+  - 'interface:vsphere-integration'
+  - 'interface:azure-integration'
   - 'interface:mount'
 config:
   deletes:

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/metadata.yaml

@@ -18,6 +18,7 @@ tags:
   - misc
 series:
   - xenial
+  - bionic
 subordinate: false
 requires:
   kube-api-endpoint:
@@ -30,9 +31,15 @@ requires:
   kube-control:
     interface: kube-control
   aws:
-    interface: aws
+    interface: aws-integration
   gcp:
-    interface: gcp
+    interface: gcp-integration
+  openstack:
+    interface: openstack-integration
+  vsphere:
+    interface: vsphere-integration
+  azure:
+    interface: azure-integration
   nfs:
     interface: mount
 provides:

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/reactive/kubernetes_worker.py

@@ -14,12 +14,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import hashlib
 import json
 import os
 import random
 import shutil
 import subprocess
 import time
+import yaml
+
+from charms.leadership import leader_get, leader_set
 
 from pathlib import Path
 from shlex import split
@@ -36,7 +40,7 @@ from charms.reactive import when, when_any, when_not, when_none
 
 from charms.kubernetes.common import get_version
 
-from charms.reactive.helpers import data_changed, any_file_changed
+from charms.reactive.helpers import data_changed
 from charms.templating.jinja2 import render
 
 from charmhelpers.core import hookenv, unitdata
@@ -52,6 +56,7 @@ kubeconfig_path = '/root/cdk/kubeconfig'
 kubeproxyconfig_path = '/root/cdk/kubeproxyconfig'
 kubeclientconfig_path = '/root/.kube/config'
 gcp_creds_env_key = 'GOOGLE_APPLICATION_CREDENTIALS'
+snap_resources = ['kubectl', 'kubelet', 'kube-proxy']
 
 os.environ['PATH'] += os.pathsep + os.path.join(os.sep, 'snap', 'bin')
 db = unitdata.kv()
@@ -59,11 +64,21 @@ db = unitdata.kv()
 
 @hook('upgrade-charm')
 def upgrade_charm():
+    # migrate to new flags
+    if is_state('kubernetes-worker.restarted-for-cloud'):
+        remove_state('kubernetes-worker.restarted-for-cloud')
+        set_state('kubernetes-worker.cloud.ready')
+    if is_state('kubernetes-worker.cloud-request-sent'):
+        # minor change, just for consistency
+        remove_state('kubernetes-worker.cloud-request-sent')
+        set_state('kubernetes-worker.cloud.request-sent')
+
     # Trigger removal of PPA docker installation if it was previously set.
     set_state('config.changed.install_from_upstream')
     hookenv.atexit(remove_state, 'config.changed.install_from_upstream')
 
     cleanup_pre_snap_services()
+    migrate_resource_checksums()
     check_resources_for_upgrade_needed()
 
     # Remove the RC for nginx ingress if it exists
@@ -88,12 +103,56 @@ def upgrade_charm():
     set_state('kubernetes-worker.restart-needed')
 
 
+def get_resource_checksum_db_key(resource):
+    ''' Convert a resource name to a resource checksum database key. '''
+    return 'kubernetes-worker.resource-checksums.' + resource
+
+
+def calculate_resource_checksum(resource):
+    ''' Calculate a checksum for a resource '''
+    md5 = hashlib.md5()
+    path = hookenv.resource_get(resource)
+    if path:
+        with open(path, 'rb') as f:
+            data = f.read()
+        md5.update(data)
+    return md5.hexdigest()
+
+
+def migrate_resource_checksums():
+    ''' Migrate resource checksums from the old schema to the new one '''
+    for resource in snap_resources:
+        new_key = get_resource_checksum_db_key(resource)
+        if not db.get(new_key):
+            path = hookenv.resource_get(resource)
+            if path:
+                # old key from charms.reactive.helpers.any_file_changed
+                old_key = 'reactive.files_changed.' + path
+                old_checksum = db.get(old_key)
+                db.set(new_key, old_checksum)
+            else:
+                # No resource is attached. Previously, this meant no checksum
+                # would be calculated and stored. But now we calculate it as if
+                # it is a 0-byte resource, so let's go ahead and do that.
+                zero_checksum = hashlib.md5().hexdigest()
+                db.set(new_key, zero_checksum)
+
+
 def check_resources_for_upgrade_needed():
     hookenv.status_set('maintenance', 'Checking resources')
-    resources = ['kubectl', 'kubelet', 'kube-proxy']
-    paths = [hookenv.resource_get(resource) for resource in resources]
-    if any_file_changed(paths):
-        set_upgrade_needed()
+    for resource in snap_resources:
+        key = get_resource_checksum_db_key(resource)
+        old_checksum = db.get(key)
+        new_checksum = calculate_resource_checksum(resource)
+        if new_checksum != old_checksum:
+            set_upgrade_needed()
+
+
+def calculate_and_store_resource_checksums():
+    for resource in snap_resources:
+        key = get_resource_checksum_db_key(resource)
+        checksum = calculate_resource_checksum(resource)
+        db.set(key, checksum)
 
 
 def set_upgrade_needed():
@@ -142,16 +201,8 @@ def channel_changed():
     set_upgrade_needed()
 
 
-@when('kubernetes-worker.snaps.upgrade-needed')
-@when_not('kubernetes-worker.snaps.upgrade-specified')
-def upgrade_needed_status():
-    msg = 'Needs manual upgrade, run the upgrade action'
-    hookenv.status_set('blocked', msg)
-
-
 @when('kubernetes-worker.snaps.upgrade-specified')
 def install_snaps():
-    check_resources_for_upgrade_needed()
     channel = hookenv.config('channel')
     hookenv.status_set('maintenance', 'Installing kubectl snap')
     snap.install('kubectl', channel=channel, classic=True)
@@ -159,6 +210,7 @@ def install_snaps():
     snap.install('kubelet', channel=channel, classic=True)
     hookenv.status_set('maintenance', 'Installing kube-proxy snap')
     snap.install('kube-proxy', channel=channel, classic=True)
+    calculate_and_store_resource_checksums()
     set_state('kubernetes-worker.snaps.installed')
     set_state('kubernetes-worker.restart-needed')
     remove_state('kubernetes-worker.snaps.upgrade-needed')
@@ -173,7 +225,7 @@ def shutdown():
     '''
     try:
         if os.path.isfile(kubeconfig_path):
-            kubectl('delete', 'node', gethostname().lower())
+            kubectl('delete', 'node', get_node_name())
     except CalledProcessError:
         hookenv.log('Failed to unregister node.')
     service_stop('snap.kubelet.daemon')
@@ -243,26 +295,73 @@ def set_app_version():
 
 
 @when('kubernetes-worker.snaps.installed')
-@when_not('kube-control.dns.available')
-def notify_user_transient_status():
-    ''' Notify to the user we are in a transient state and the application
-    is still converging. Potentially remotely, or we may be in a detached loop
-    wait state '''
+@when('snap.refresh.set')
+@when('leadership.is_leader')
+def process_snapd_timer():
+    ''' Set the snapd refresh timer on the leader so all cluster members
+    (present and future) will refresh near the same time. '''
+    # Get the current snapd refresh timer; we know layer-snap has set this
+    # when the 'snap.refresh.set' flag is present.
+    timer = snap.get(snapname='core', key='refresh.timer').decode('utf-8')
 
-    # During deployment the worker has to start kubelet without cluster dns
-    # configured. If this is the first unit online in a service pool waiting
-    # to self host the dns pod, and configure itself to query the dns service
-    # declared in the kube-system namespace
-
-    hookenv.status_set('waiting', 'Waiting for cluster DNS.')
+    # The first time through, data_changed will be true. Subsequent calls
+    # should only update leader data if something changed.
+    if data_changed('worker_snapd_refresh', timer):
+        hookenv.log('setting snapd_refresh timer to: {}'.format(timer))
+        leader_set({'snapd_refresh': timer})
 
 
-@when('kubernetes-worker.snaps.installed',
-      'kube-control.dns.available')
-@when_not('kubernetes-worker.snaps.upgrade-needed')
-def charm_status(kube_control):
+@when('kubernetes-worker.snaps.installed')
+@when('snap.refresh.set')
+@when('leadership.changed.snapd_refresh')
+@when_not('leadership.is_leader')
+def set_snapd_timer():
+    ''' Set the snapd refresh.timer on non-leader cluster members. '''
+    # NB: This method should only be run when 'snap.refresh.set' is present.
+    # Layer-snap will always set a core refresh.timer, which may not be the
+    # same as our leader. Gating with 'snap.refresh.set' ensures layer-snap
+    # has finished and we are free to set our config to the leader's timer.
+    timer = leader_get('snapd_refresh')
+    hookenv.log('setting snapd_refresh timer to: {}'.format(timer))
+    snap.set_refresh_timer(timer)
+
+
+@hookenv.atexit
+def charm_status():
     '''Update the status message with the current status of kubelet.'''
-    update_kubelet_status()
+    vsphere_joined = is_state('endpoint.vsphere.joined')
+    azure_joined = is_state('endpoint.azure.joined')
+    cloud_blocked = is_state('kubernetes-worker.cloud.blocked')
+    if vsphere_joined and cloud_blocked:
+        hookenv.status_set('blocked',
+                           'vSphere integration requires K8s 1.12 or greater')
+        return
+    if azure_joined and cloud_blocked:
+        hookenv.status_set('blocked',
+                           'Azure integration requires K8s 1.11 or greater')
+        return
+    if is_state('kubernetes-worker.cloud.pending'):
+        hookenv.status_set('waiting', 'Waiting for cloud integration')
+        return
+    if not is_state('kube-control.dns.available'):
+        # During deployment the worker has to start kubelet without cluster dns
+        # configured. If this is the first unit online in a service pool
+        # waiting to self host the dns pod, and configure itself to query the
+        # dns service declared in the kube-system namespace
+        hookenv.status_set('waiting', 'Waiting for cluster DNS.')
+        return
+    if is_state('kubernetes-worker.snaps.upgrade-specified'):
+        hookenv.status_set('waiting', 'Upgrade pending')
+        return
+    if is_state('kubernetes-worker.snaps.upgrade-needed'):
+        hookenv.status_set('blocked',
+                           'Needs manual upgrade, run the upgrade action')
+        return
+    if is_state('kubernetes-worker.snaps.installed'):
+        update_kubelet_status()
+        return
+    else:
+        pass  # will have been set by snap layer or other handler
 
 
 def update_kubelet_status():
@@ -347,6 +446,8 @@ def watch_for_changes(kube_api, kube_control, cni):
       'kube-control.dns.available', 'kube-control.auth.available',
       'cni.available', 'kubernetes-worker.restart-needed',
       'worker.auth.bootstrapped')
+@when_not('kubernetes-worker.cloud.pending',
+          'kubernetes-worker.cloud.blocked')
 def start_worker(kube_api, kube_control, auth_control, cni):
     ''' Start kubelet using the provided API and DNS info.'''
     servers = get_kube_api_servers(kube_api)
@@ -403,8 +504,8 @@ def sdn_changed():
 @when('kubernetes-worker.config.created')
 @when_not('kubernetes-worker.ingress.available')
 def render_and_launch_ingress():
-    ''' If configuration has ingress daemon set enabled, launch the ingress load
-    balancer and default http backend. Otherwise attempt deletion. '''
+    ''' If configuration has ingress daemon set enabled, launch the ingress
+    load balancer and default http backend. Otherwise attempt deletion. '''
     config = hookenv.config()
     # If ingress is enabled, launch the ingress controller
     if config.get('ingress'):
@@ -470,8 +571,9 @@ def apply_node_labels():
 
 
 @when_any('config.changed.kubelet-extra-args',
-          'config.changed.proxy-extra-args')
-def extra_args_changed():
+          'config.changed.proxy-extra-args',
+          'config.changed.kubelet-extra-config')
+def config_changed_requires_restart():
     set_state('kubernetes-worker.restart-needed')
 
 
@@ -592,6 +694,20 @@ def configure_kubernetes_service(service, base_args, extra_args_key):
     db.set(prev_args_key, args)
 
 
+def merge_kubelet_extra_config(config, extra_config):
+    ''' Updates config to include the contents of extra_config. This is done
+    recursively to allow deeply nested dictionaries to be merged.
+
+    This is destructive: it modifies the config dict that is passed in.
+    '''
+    for k, extra_config_value in extra_config.items():
+        if isinstance(extra_config_value, dict):
+            config_value = config.setdefault(k, {})
+            merge_kubelet_extra_config(config_value, extra_config_value)
+        else:
+            config[k] = extra_config_value
+
+
 def configure_kubelet(dns, ingress_ip):
     layer_options = layer.options('tls-client')
     ca_cert_path = layer_options.get('ca_certificate_path')
@@ -603,35 +719,93 @@ def configure_kubelet(dns, ingress_ip):
     kubelet_opts['kubeconfig'] = kubeconfig_path
     kubelet_opts['network-plugin'] = 'cni'
     kubelet_opts['v'] = '0'
-    kubelet_opts['address'] = '0.0.0.0'
-    kubelet_opts['port'] = '10250'
-    kubelet_opts['cluster-domain'] = dns['domain']
-    kubelet_opts['anonymous-auth'] = 'false'
-    kubelet_opts['client-ca-file'] = ca_cert_path
-    kubelet_opts['tls-cert-file'] = server_cert_path
-    kubelet_opts['tls-private-key-file'] = server_key_path
     kubelet_opts['logtostderr'] = 'true'
-    kubelet_opts['fail-swap-on'] = 'false'
     kubelet_opts['node-ip'] = ingress_ip
-
-    if (dns['enable-kube-dns']):
-        kubelet_opts['cluster-dns'] = dns['sdn-ip']
-
-    # set --allow-privileged flag for kubelet
     kubelet_opts['allow-privileged'] = set_privileged()
 
-    if is_state('kubernetes-worker.gpu.enabled'):
-        hookenv.log('Adding '
-                    '--feature-gates=DevicePlugins=true '
-                    'to kubelet')
-        kubelet_opts['feature-gates'] = 'DevicePlugins=true'
-
     if is_state('endpoint.aws.ready'):
         kubelet_opts['cloud-provider'] = 'aws'
     elif is_state('endpoint.gcp.ready'):
         cloud_config_path = _cloud_config_path('kubelet')
         kubelet_opts['cloud-provider'] = 'gce'
         kubelet_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.openstack.ready'):
+        cloud_config_path = _cloud_config_path('kubelet')
+        kubelet_opts['cloud-provider'] = 'openstack'
+        kubelet_opts['cloud-config'] = str(cloud_config_path)
+    elif is_state('endpoint.vsphere.joined'):
+        # vsphere just needs to be joined on the worker (vs 'ready')
+        cloud_config_path = _cloud_config_path('kubelet')
+        kubelet_opts['cloud-provider'] = 'vsphere'
+        # NB: vsphere maps node product-id to its uuid (no config file needed).
+        uuid_file = '/sys/class/dmi/id/product_uuid'
+        with open(uuid_file, 'r') as f:
+            uuid = f.read().strip()
+        kubelet_opts['provider-id'] = 'vsphere://{}'.format(uuid)
+    elif is_state('endpoint.azure.ready'):
+        azure = endpoint_from_flag('endpoint.azure.ready')
+        cloud_config_path = _cloud_config_path('kubelet')
+        kubelet_opts['cloud-provider'] = 'azure'
+        kubelet_opts['cloud-config'] = str(cloud_config_path)
+        kubelet_opts['provider-id'] = azure.vm_id
+
+    if get_version('kubelet') >= (1, 10):
+        # Put together the KubeletConfiguration data
+        kubelet_config = {
+            'apiVersion': 'kubelet.config.k8s.io/v1beta1',
+            'kind': 'KubeletConfiguration',
+            'address': '0.0.0.0',
+            'authentication': {
+                'anonymous': {
+                    'enabled': False
+                },
+                'x509': {
+                    'clientCAFile': ca_cert_path
+                }
+            },
+            'clusterDomain': dns['domain'],
+            'failSwapOn': False,
+            'port': 10250,
+            'tlsCertFile': server_cert_path,
+            'tlsPrivateKeyFile': server_key_path
+        }
+        if dns['enable-kube-dns']:
+            kubelet_config['clusterDNS'] = [dns['sdn-ip']]
+        if is_state('kubernetes-worker.gpu.enabled'):
+            kubelet_config['featureGates'] = {
+                'DevicePlugins': True
+            }
+
+        # Add kubelet-extra-config. This needs to happen last so that it
+        # overrides any config provided by the charm.
+        kubelet_extra_config = hookenv.config('kubelet-extra-config')
+        kubelet_extra_config = yaml.load(kubelet_extra_config)
+        merge_kubelet_extra_config(kubelet_config, kubelet_extra_config)
+
+        # Render the file and configure Kubelet to use it
+        os.makedirs('/root/cdk/kubelet', exist_ok=True)
+        with open('/root/cdk/kubelet/config.yaml', 'w') as f:
+            f.write('# Generated by kubernetes-worker charm, do not edit\n')
+            yaml.dump(kubelet_config, f)
+        kubelet_opts['config'] = '/root/cdk/kubelet/config.yaml'
+    else:
+        # NOTE: This is for 1.9. Once we've dropped 1.9 support, we can remove
+        # this whole block and the parent if statement.
+        kubelet_opts['address'] = '0.0.0.0'
+        kubelet_opts['anonymous-auth'] = 'false'
+        kubelet_opts['client-ca-file'] = ca_cert_path
+        kubelet_opts['cluster-domain'] = dns['domain']
+        kubelet_opts['fail-swap-on'] = 'false'
+        kubelet_opts['port'] = '10250'
+        kubelet_opts['tls-cert-file'] = server_cert_path
+        kubelet_opts['tls-private-key-file'] = server_key_path
+        if dns['enable-kube-dns']:
+            kubelet_opts['cluster-dns'] = dns['sdn-ip']
+        if is_state('kubernetes-worker.gpu.enabled'):
+            kubelet_opts['feature-gates'] = 'DevicePlugins=true'
+
+    if get_version('kubelet') >= (1, 11):
+        kubelet_opts['dynamic-config-dir'] = '/root/cdk/kubelet/dynamic-config'
 
     configure_kubernetes_service('kubelet', kubelet_opts, 'kubelet-extra-args')
 
@@ -696,6 +870,7 @@ def create_kubeconfig(kubeconfig, server, ca, key=None, certificate=None,
 
 
 @when_any('config.changed.default-backend-image',
+          'config.changed.ingress-ssl-chain-completion',
           'config.changed.nginx-image')
 @when('kubernetes-worker.config.created')
 def launch_default_ingress_controller():
@@ -716,13 +891,13 @@ def launch_default_ingress_controller():
        context['defaultbackend_image'] == "auto"):
         if context['arch'] == 's390x':
             context['defaultbackend_image'] = \
-                "k8s.gcr.io/defaultbackend-s390x:1.4"
+                "k8s.gcr.io/defaultbackend-s390x:1.5"
         elif context['arch'] == 'arm64':
             context['defaultbackend_image'] = \
-                "k8s.gcr.io/defaultbackend-arm64:1.4"
+                "k8s.gcr.io/defaultbackend-arm64:1.5"
         else:
             context['defaultbackend_image'] = \
-                "k8s.gcr.io/defaultbackend:1.4"
+                "k8s.gcr.io/defaultbackend-amd64:1.5"
 
     # Render the default http backend (404) replicationcontroller manifest
     manifest = addon_path.format('default-http-backend.yaml')
@@ -738,17 +913,16 @@ def launch_default_ingress_controller():
         return
 
     # Render the ingress daemon set controller manifest
+    context['ssl_chain_completion'] = config.get(
+        'ingress-ssl-chain-completion')
     context['ingress_image'] = config.get('nginx-image')
     if context['ingress_image'] == "" or context['ingress_image'] == "auto":
-        if context['arch'] == 's390x':
-            context['ingress_image'] = \
-                "docker.io/cdkbot/nginx-ingress-controller-s390x:0.9.0-beta.13"
-        elif context['arch'] == 'arm64':
-            context['ingress_image'] = \
-                "k8s.gcr.io/nginx-ingress-controller-arm64:0.9.0-beta.15"
-        else:
-            context['ingress_image'] = \
-                "k8s.gcr.io/nginx-ingress-controller:0.9.0-beta.15"  # noqa
+        images = {'amd64': 'quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.16.1',  # noqa
+                  'arm64': 'quay.io/kubernetes-ingress-controller/nginx-ingress-controller-arm64:0.16.1',  # noqa
+                  's390x': 'quay.io/kubernetes-ingress-controller/nginx-ingress-controller-s390x:0.16.1',  # noqa
+                  'ppc64el': 'quay.io/kubernetes-ingress-controller/nginx-ingress-controller-ppc64le:0.16.1',  # noqa
+                  }
+        context['ingress_image'] = images.get(context['arch'], images['amd64'])
     if get_version('kubelet') < (1, 9):
         context['daemonset_api_version'] = 'extensions/v1beta1'
     else:
@@ -910,7 +1084,7 @@ def enable_gpu():
     if get_version('kubelet') < (1, 9):
         hookenv.status_set(
             'active',
-            'Upgrade to snap channel >= 1.9/stable to enable GPU suppport.'
+            'Upgrade to snap channel >= 1.9/stable to enable GPU support.'
         )
         return
 
@@ -1008,10 +1182,20 @@ def missing_kube_control():
     missing.
 
     """
-    hookenv.status_set(
-        'blocked',
-        'Relate {}:kube-control kubernetes-master:kube-control'.format(
-            hookenv.service_name()))
+    try:
+        goal_state = hookenv.goal_state()
+    except NotImplementedError:
+        goal_state = {}
+
+    if 'kube-control' in goal_state.get('relations', {}):
+        hookenv.status_set(
+            'waiting',
+            'Waiting for kubernetes-master to become ready')
+    else:
+        hookenv.status_set(
+            'blocked',
+            'Relate {}:kube-control kubernetes-master:kube-control'.format(
+                hookenv.service_name()))
 
 
 @when('docker.ready')
@@ -1040,11 +1224,17 @@ def get_node_name():
     if is_state('endpoint.aws.ready'):
         cloud_provider = 'aws'
     elif is_state('endpoint.gcp.ready'):
-        cloud_provider = 'gcp'
+        cloud_provider = 'gce'
+    elif is_state('endpoint.openstack.ready'):
+        cloud_provider = 'openstack'
+    elif is_state('endpoint.vsphere.ready'):
+        cloud_provider = 'vsphere'
+    elif is_state('endpoint.azure.ready'):
+        cloud_provider = 'azure'
     if cloud_provider == 'aws':
-        return getfqdn()
+        return getfqdn().lower()
     else:
-        return gethostname()
+        return gethostname().lower()
 
 
 class ApplyNodeLabelFailed(Exception):
@@ -1084,9 +1274,29 @@ def remove_label(label):
 
 
 @when_any('endpoint.aws.joined',
-          'endpoint.gcp.joined')
+          'endpoint.gcp.joined',
+          'endpoint.openstack.joined',
+          'endpoint.vsphere.joined',
+          'endpoint.azure.joined')
+@when_not('kubernetes-worker.cloud.ready')
+def set_cloud_pending():
+    k8s_version = get_version('kubelet')
+    k8s_1_11 = k8s_version >= (1, 11)
+    k8s_1_12 = k8s_version >= (1, 12)
+    vsphere_joined = is_state('endpoint.vsphere.joined')
+    azure_joined = is_state('endpoint.azure.joined')
+    if (vsphere_joined and not k8s_1_12) or (azure_joined and not k8s_1_11):
+        set_state('kubernetes-worker.cloud.blocked')
+    else:
+        remove_state('kubernetes-worker.cloud.blocked')
+    set_state('kubernetes-worker.cloud.pending')
+
+
+@when_any('endpoint.aws.joined',
+          'endpoint.gcp.joined',
+          'endpoint.azure.joined')
 @when('kube-control.cluster_tag.available')
-@when_not('kubernetes-worker.cloud-request-sent')
+@when_not('kubernetes-worker.cloud.request-sent')
 def request_integration():
     hookenv.status_set('maintenance', 'requesting cloud integration')
     kube_control = endpoint_from_flag('kube-control.cluster_tag.available')
@@ -1109,26 +1319,47 @@ def request_integration():
             'k8s-io-cluster-name': cluster_tag,
         })
         cloud.enable_object_storage_management()
+    elif is_state('endpoint.azure.joined'):
+        cloud = endpoint_from_flag('endpoint.azure.joined')
+        cloud.tag_instance({
+            'k8s-io-cluster-name': cluster_tag,
+        })
+        cloud.enable_object_storage_management()
     cloud.enable_instance_inspection()
     cloud.enable_dns_management()
-    set_state('kubernetes-worker.cloud-request-sent')
-    hookenv.status_set('waiting', 'waiting for cloud integration')
+    set_state('kubernetes-worker.cloud.request-sent')
+    hookenv.status_set('waiting', 'Waiting for cloud integration')
 
 
 @when_none('endpoint.aws.joined',
-           'endpoint.gcp.joined')
-def clear_requested_integration():
-    remove_state('kubernetes-worker.cloud-request-sent')
+           'endpoint.gcp.joined',
+           'endpoint.openstack.joined',
+           'endpoint.vsphere.joined',
+           'endpoint.azure.joined')
+def clear_cloud_flags():
+    remove_state('kubernetes-worker.cloud.pending')
+    remove_state('kubernetes-worker.cloud.request-sent')
+    remove_state('kubernetes-worker.cloud.blocked')
+    remove_state('kubernetes-worker.cloud.ready')
 
 
 @when_any('endpoint.aws.ready',
-          'endpoint.gcp.ready')
-@when_not('kubernetes-worker.restarted-for-cloud')
-def restart_for_cloud():
+          'endpoint.gcp.ready',
+          'endpoint.openstack.ready',
+          'endpoint.vsphere.ready',
+          'endpoint.azure.ready')
+@when_not('kubernetes-worker.cloud.blocked',
+          'kubernetes-worker.cloud.ready')
+def cloud_ready():
+    remove_state('kubernetes-worker.cloud.pending')
     if is_state('endpoint.gcp.ready'):
         _write_gcp_snap_config('kubelet')
-    set_state('kubernetes-worker.restarted-for-cloud')
-    set_state('kubernetes-worker.restart-needed')
+    elif is_state('endpoint.openstack.ready'):
+        _write_openstack_snap_config('kubelet')
+    elif is_state('endpoint.azure.ready'):
+        _write_azure_snap_config('kubelet')
+    set_state('kubernetes-worker.cloud.ready')
+    set_state('kubernetes-worker.restart-needed')  # force restart
 
 
 def _snap_common_path(component):
@@ -1176,6 +1407,37 @@ def _write_gcp_snap_config(component):
         daemon_env_path.write_text(daemon_env)
 
 
+def _write_openstack_snap_config(component):
+    # openstack requires additional credentials setup
+    openstack = endpoint_from_flag('endpoint.openstack.ready')
+
+    cloud_config_path = _cloud_config_path(component)
+    cloud_config_path.write_text('\n'.join([
+        '[Global]',
+        'auth-url = {}'.format(openstack.auth_url),
+        'username = {}'.format(openstack.username),
+        'password = {}'.format(openstack.password),
+        'tenant-name = {}'.format(openstack.project_name),
+        'domain-name = {}'.format(openstack.user_domain_name),
+    ]))
+
+
+def _write_azure_snap_config(component):
+    azure = endpoint_from_flag('endpoint.azure.ready')
+    cloud_config_path = _cloud_config_path(component)
+    cloud_config_path.write_text(json.dumps({
+        'useInstanceMetadata': True,
+        'useManagedIdentityExtension': True,
+        'subscriptionId': azure.subscription_id,
+        'resourceGroup': azure.resource_group,
+        'location': azure.resource_group_location,
+        'vnetName': azure.vnet_name,
+        'vnetResourceGroup': azure.vnet_resource_group,
+        'subnetName': azure.subnet_name,
+        'securityGroupName': azure.security_group_name,
+    }))
+
+
 def get_first_mount(mount_relation):
     mount_relation_list = mount_relation.mounts()
     if mount_relation_list and len(mount_relation_list) > 0:

vendor/k8s.io/kubernetes/cluster/juju/layers/kubernetes-worker/templates/ingress-daemon-set.yaml

@@ -176,3 +176,4 @@ spec:
         - /nginx-ingress-controller
         - --default-backend-service=$(POD_NAMESPACE)/default-http-backend
         - --configmap=$(POD_NAMESPACE)/nginx-load-balancer-conf
+        - --enable-ssl-chain-completion={{ ssl_chain_completion }}