mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 12:20:24 +00:00
140 lines
4.4 KiB
Go
140 lines
4.4 KiB
Go
/*
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Copyright 2018 The Kubernetes 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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"k8s.io/kubernetes/pkg/util/nsenter"
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"k8s.io/utils/exec"
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)
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// PluginFolder defines the location of rbdplugin
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const (
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rbdDefaultAdminID = "admin"
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rbdDefaultUserID = rbdDefaultAdminID
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)
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// PluginFolder defines the location of ceph plugin
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var PluginFolder = "/var/lib/kubelet/plugins/"
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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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// confStore is the global config store
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confStore *util.ConfigStore
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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 = mount.NewNsenterMounter("", 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, configRoot 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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// Initialize config store
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confStore, err = util.NewConfigStore(configRoot)
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if err != nil {
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klog.Fatalln("Failed to initialize config store.")
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}
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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_LIST_VOLUMES,
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
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csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
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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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if err = r.cs.LoadExDataFromMetadataStore(); err != nil {
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klog.Fatalf("failed to load metadata from store, err %v\n", err)
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}
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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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