mirror of
https://github.com/ceph/ceph-csi.git
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fa68c35f3b
This commit adds support to mount and delete volumes provisioned by older plugin versions (1.0.0) in order to support backward compatibility to 1.0.0 created volumes. It adds back the ability to specify where older meta data was specified, using the metadatastorage option to the plugin. Further, using the provided meta data to mount and delete the older volumes. It also supports a variety of ways in which monitor information may have been specified (in the storage class, or in the secret), to keep the monitor information current. Testing done: - Mount/Delete 1.0.0 plugin created volume with monitors in the StorageClass - Mount/Delete 1.0.0 plugin created volume with monitors in the secret with a key "monitors" - Mount/Delete 1.0.0 plugin created volume with monitors in the secret with a user specified key - PVC creation and deletion with the current version (to ensure at the minimum no broken functionality) - Tested some negative cases, where monitor information is missing in secrets or present with a different key name, to understand if failure scenarios work as expected Updates #378 Follow-up work: - Documentation on how to upgrade to 1.1 plugin and retain above functionality for older volumes Signed-off-by: ShyamsundarR <srangana@redhat.com>
157 lines
5.0 KiB
Go
157 lines
5.0 KiB
Go
/*
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Copyright 2018 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rbd
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import (
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csicommon "github.com/ceph/ceph-csi/pkg/csi-common"
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"github.com/ceph/ceph-csi/pkg/util"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"k8s.io/klog"
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"k8s.io/kubernetes/pkg/util/mount"
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nsutil "k8s.io/kubernetes/pkg/volume/util/nsenter"
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"k8s.io/utils/exec"
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"k8s.io/utils/nsenter"
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)
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const (
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// volIDVersion is the version number of volume ID encoding scheme
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volIDVersion uint16 = 1
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// csiConfigFile is the location of the CSI config file
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csiConfigFile = "/etc/ceph-csi-config/config.json"
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)
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// Driver contains the default identity,node and controller struct
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type Driver struct {
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cd *csicommon.CSIDriver
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ids *IdentityServer
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ns *NodeServer
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cs *ControllerServer
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}
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var (
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version = "1.0.0"
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// PluginFolder defines the location of ceph plugin
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PluginFolder = "/var/lib/kubelet/plugins/"
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// CSIInstanceID is the instance ID that is unique to an instance of CSI, used when sharing
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// ceph clusters across CSI instances, to differentiate omap names per CSI instance
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CSIInstanceID = "default"
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// volJournal and snapJournal are used to maintain RADOS based journals for CO generated
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// VolumeName to backing RBD images
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volJournal *util.CSIJournal
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snapJournal *util.CSIJournal
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)
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// NewDriver returns new rbd driver
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func NewDriver() *Driver {
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return &Driver{}
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}
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// NewIdentityServer initialize a identity server for rbd CSI driver
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func NewIdentityServer(d *csicommon.CSIDriver) *IdentityServer {
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return &IdentityServer{
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DefaultIdentityServer: csicommon.NewDefaultIdentityServer(d),
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}
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}
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// NewControllerServer initialize a controller server for rbd CSI driver
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func NewControllerServer(d *csicommon.CSIDriver, cachePersister util.CachePersister) *ControllerServer {
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return &ControllerServer{
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DefaultControllerServer: csicommon.NewDefaultControllerServer(d),
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MetadataStore: cachePersister,
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}
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}
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// NewNodeServer initialize a node server for rbd CSI driver.
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func NewNodeServer(d *csicommon.CSIDriver, containerized bool) (*NodeServer, error) {
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mounter := mount.New("")
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if containerized {
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ne, err := nsenter.NewNsenter(nsenter.DefaultHostRootFsPath, exec.New())
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if err != nil {
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return nil, err
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}
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mounter = nsutil.NewMounter("", ne)
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}
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return &NodeServer{
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DefaultNodeServer: csicommon.NewDefaultNodeServer(d),
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mounter: mounter,
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}, nil
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}
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// Run start a non-blocking grpc controller,node and identityserver for
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// rbd CSI driver which can serve multiple parallel requests
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func (r *Driver) Run(driverName, nodeID, endpoint, instanceID string, containerized bool, cachePersister util.CachePersister) {
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var err error
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klog.Infof("Driver: %v version: %v", driverName, version)
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// Create ceph.conf for use with CLI commands
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if err = util.WriteCephConfig(); err != nil {
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klog.Fatalf("failed to write ceph configuration file (%v)", err)
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}
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// Use passed in instance ID, if provided for omap suffix naming
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if instanceID != "" {
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CSIInstanceID = instanceID
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}
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// Get an instance of the volume and snapshot journal keys
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volJournal = util.NewCSIVolumeJournal()
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snapJournal = util.NewCSISnapshotJournal()
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// Update keys with CSI instance suffix
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volJournal.SetCSIDirectorySuffix(CSIInstanceID)
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snapJournal.SetCSIDirectorySuffix(CSIInstanceID)
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// Initialize default library driver
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r.cd = csicommon.NewCSIDriver(driverName, version, nodeID)
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if r.cd == nil {
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klog.Fatalln("Failed to initialize CSI Driver.")
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}
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r.cd.AddControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
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csi.ControllerServiceCapability_RPC_CLONE_VOLUME,
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})
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// We only support the multi-writer option when using block, but it's a supported capability for the plugin in general
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// In addition, we want to add the remaining modes like MULTI_NODE_READER_ONLY,
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// MULTI_NODE_SINGLE_WRITER etc, but need to do some verification of RO modes first
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// will work those as follow up features
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r.cd.AddVolumeCapabilityAccessModes(
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[]csi.VolumeCapability_AccessMode_Mode{csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
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csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER})
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// Create GRPC servers
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r.ids = NewIdentityServer(r.cd)
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r.ns, err = NewNodeServer(r.cd, containerized)
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if err != nil {
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klog.Fatalf("failed to start node server, err %v\n", err)
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}
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r.cs = NewControllerServer(r.cd, cachePersister)
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s := csicommon.NewNonBlockingGRPCServer()
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s.Start(endpoint, r.ids, r.cs, r.ns)
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s.Wait()
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}
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