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Serguei Bezverkhi
2018-01-09 13:57:14 -05:00
parent 558bc6c02a
commit 7b24313bd6
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5
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/README.md generated vendored Normal file
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# kubeapi-load-balancer
Simple NGINX reverse proxy to lend a hand in HA kubernetes-master deployments.

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vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/config.yaml generated vendored Normal file
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options:
port:
type: int
default: 443
description: The port to run the loadbalancer
extra_sans:
type: string
default: ""
description: |
Space-separated list of extra SAN entries to add to the x509 certificate
created for the load balancers.

13
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/copyright generated vendored Normal file
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Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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14
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/layer.yaml generated vendored Normal file
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repo: https://github.com/kubernetes/kubernetes.git
includes:
- 'layer:metrics'
- 'layer:nagios'
- 'layer:nginx'
- 'layer:tls-client'
- 'interface:public-address'
options:
tls-client:
ca_certificate_path: '/srv/kubernetes/ca.crt'
server_certificate_path: '/srv/kubernetes/server.crt'
server_key_path: '/srv/kubernetes/server.key'
client_certificate_path: '/srv/kubernetes/client.crt'
client_key_path: '/srv/kubernetes/client.key'

22
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/metadata.yaml generated vendored Normal file
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name: kubeapi-load-balancer
summary: Nginx Load Balancer
maintainers:
- Tim Van Steenburgh <tim.van.steenburgh@canonical.com>
- George Kraft <george.kraft@canonical.com>
- Rye Terrell <rye.terrell@canonical.com>
- Konstantinos Tsakalozos <kos.tsakalozos@canonical.com>
- Charles Butler <Chuck@dasroot.net>
- Matthew Bruzek <mbruzek@ubuntu.com>
description: |
A round robin Nginx load balancer to distribute traffic for kubernetes apiservers.
tags:
- misc
subordinate: false
series:
- xenial
requires:
apiserver:
interface: http
provides:
loadbalancer:
interface: public-address

2
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/metrics.yaml generated vendored Normal file
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metrics:
juju-units: {}

196
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/reactive/load_balancer.py generated vendored Normal file
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#!/usr/bin/env python
# Copyright 2015 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import socket
import subprocess
from charms import layer
from charms.reactive import when, when_any, when_not
from charms.reactive import set_state, remove_state
from charmhelpers.core import hookenv
from charmhelpers.core import host
from charmhelpers.contrib.charmsupport import nrpe
from charms.reactive.helpers import data_changed
from charms.layer import nginx
from charms.layer import tls_client
from subprocess import Popen
from subprocess import PIPE
from subprocess import STDOUT
from subprocess import CalledProcessError
@when('certificates.available')
def request_server_certificates(tls):
'''Send the data that is required to create a server certificate for
this server.'''
# Use the public ip of this unit as the Common Name for the certificate.
common_name = hookenv.unit_public_ip()
# Create SANs that the tls layer will add to the server cert.
sans = [
hookenv.unit_public_ip(),
hookenv.unit_private_ip(),
socket.gethostname(),
]
# maybe they have extra names they want as SANs
extra_sans = hookenv.config('extra_sans')
if extra_sans and not extra_sans == "":
sans.extend(extra_sans.split())
# Create a path safe name by removing path characters from the unit name.
certificate_name = hookenv.local_unit().replace('/', '_')
# Request a server cert with this information.
tls.request_server_cert(common_name, sans, certificate_name)
@when('config.changed.extra_sans', 'certificates.available')
def update_certificate(tls):
# Using the config.changed.extra_sans flag to catch changes.
# IP changes will take ~5 minutes or so to propagate, but
# it will update.
request_server_certificates(tls)
@when('certificates.server.cert.available',
'nginx.available', 'tls_client.server.certificate.written')
def kick_nginx(tls):
# we are just going to sighup it, but still want to avoid kicking it
# without need
if data_changed('cert', tls.get_server_cert()):
# certificate changed, so sighup nginx
hookenv.log("Certificate information changed, sending SIGHUP to nginx")
host.service_restart('nginx')
tls_client.reset_certificate_write_flag('server')
@when('config.changed.port')
def close_old_port():
config = hookenv.config()
old_port = config.previous('port')
if not old_port:
return
try:
hookenv.close_port(old_port)
except CalledProcessError:
hookenv.log('Port %d already closed, skipping.' % old_port)
@when('nginx.available', 'apiserver.available',
'certificates.server.cert.available')
def install_load_balancer(apiserver, tls):
''' Create the default vhost template for load balancing '''
# Get the tls paths from the layer data.
layer_options = layer.options('tls-client')
server_cert_path = layer_options.get('server_certificate_path')
cert_exists = server_cert_path and os.path.isfile(server_cert_path)
server_key_path = layer_options.get('server_key_path')
key_exists = server_key_path and os.path.isfile(server_key_path)
# Do both the key and certificate exist?
if cert_exists and key_exists:
# At this point the cert and key exist, and they are owned by root.
chown = ['chown', 'www-data:www-data', server_cert_path]
# Change the owner to www-data so the nginx process can read the cert.
subprocess.call(chown)
chown = ['chown', 'www-data:www-data', server_key_path]
# Change the owner to www-data so the nginx process can read the key.
subprocess.call(chown)
port = hookenv.config('port')
hookenv.open_port(port)
services = apiserver.services()
nginx.configure_site(
'apilb',
'apilb.conf',
server_name='_',
services=services,
port=port,
server_certificate=server_cert_path,
server_key=server_key_path,
)
hookenv.status_set('active', 'Loadbalancer ready.')
@when('nginx.available')
def set_nginx_version():
''' Surface the currently deployed version of nginx to Juju '''
cmd = 'nginx -v'
p = Popen(cmd, shell=True,
stdin=PIPE,
stdout=PIPE,
stderr=STDOUT,
close_fds=True)
raw = p.stdout.read()
# The version comes back as:
# nginx version: nginx/1.10.0 (Ubuntu)
version = raw.split(b'/')[-1].split(b' ')[0]
hookenv.application_version_set(version.rstrip())
@when('website.available')
def provide_application_details(website):
''' re-use the nginx layer website relation to relay the hostname/port
to any consuming kubernetes-workers, or other units that require the
kubernetes API '''
website.configure(port=hookenv.config('port'))
@when('loadbalancer.available')
def provide_loadbalancing(loadbalancer):
'''Send the public address and port to the public-address interface, so
the subordinates can get the public address of this loadbalancer.'''
loadbalancer.set_address_port(hookenv.unit_get('public-address'),
hookenv.config('port'))
@when('nrpe-external-master.available')
@when_not('nrpe-external-master.initial-config')
def initial_nrpe_config(nagios=None):
set_state('nrpe-external-master.initial-config')
update_nrpe_config(nagios)
@when('nginx.available')
@when('nrpe-external-master.available')
@when_any('config.changed.nagios_context',
'config.changed.nagios_servicegroups')
def update_nrpe_config(unused=None):
services = ('nginx',)
hostname = nrpe.get_nagios_hostname()
current_unit = nrpe.get_nagios_unit_name()
nrpe_setup = nrpe.NRPE(hostname=hostname)
nrpe.add_init_service_checks(nrpe_setup, services, current_unit)
nrpe_setup.write()
@when_not('nrpe-external-master.available')
@when('nrpe-external-master.initial-config')
def remove_nrpe_config(nagios=None):
remove_state('nrpe-external-master.initial-config')
# List of systemd services for which the checks will be removed
services = ('nginx',)
# The current nrpe-external-master interface doesn't handle a lot of logic,
# use the charm-helpers code for now.
hostname = nrpe.get_nagios_hostname()
nrpe_setup = nrpe.NRPE(hostname=hostname)
for service in services:
nrpe_setup.remove_check(shortname=service)

41
vendor/k8s.io/kubernetes/cluster/juju/layers/kubeapi-load-balancer/templates/apilb.conf generated vendored Normal file
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{% for app in services -%}
upstream target_service {
{% for host in app['hosts'] -%}
server {{ host['hostname'] }}:{{ host['port'] }};
{% endfor %}
}
{% endfor %}
server {
listen {{ port }} ssl http2;
server_name {{ server_name }};
access_log /var/log/nginx.access.log;
error_log /var/log/nginx.error.log;
ssl on;
ssl_session_cache builtin:1000 shared:SSL:10m;
ssl_certificate {{ server_certificate }};
ssl_certificate_key {{ server_key }};
ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
ssl_prefer_server_ciphers on;
location / {
proxy_buffering off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Proto-Version $http2;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $http_connection;
proxy_set_header X-Stream-Protocol-Version $http_x_stream_protocol_version;
add_header X-Stream-Protocol-Version $upstream_http_x_stream_protocol_version;
proxy_pass https://target_service;
proxy_read_timeout 90;
}
}