ceph-csi/pkg/rbd/rbd.go

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/*
Copyright 2018 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.
*/
package rbd
import (
"github.com/golang/glog"
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"github.com/ceph/ceph-csi/pkg/util"
"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/kubernetes-csi/drivers/pkg/csi-common"
"k8s.io/kubernetes/pkg/util/mount"
"k8s.io/kubernetes/pkg/util/nsenter"
"k8s.io/utils/exec"
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)
// PluginFolder defines the location of rbdplugin
const (
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PluginFolder = "/var/lib/kubelet/plugins/csi-rbdplugin"
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rbdDefaultAdminId = "admin"
rbdDefaultUserId = rbdDefaultAdminId
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)
type rbd struct {
driver *csicommon.CSIDriver
ids *identityServer
ns *nodeServer
cs *controllerServer
cap []*csi.VolumeCapability_AccessMode
cscap []*csi.ControllerServiceCapability
}
var (
rbdDriver *rbd
version = "1.0.0"
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)
func GetRBDDriver() *rbd {
return &rbd{}
}
func NewIdentityServer(d *csicommon.CSIDriver) *identityServer {
return &identityServer{
DefaultIdentityServer: csicommon.NewDefaultIdentityServer(d),
}
}
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func NewControllerServer(d *csicommon.CSIDriver, cachePersister util.CachePersister) *controllerServer {
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return &controllerServer{
DefaultControllerServer: csicommon.NewDefaultControllerServer(d),
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MetadataStore: cachePersister,
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}
}
func NewNodeServer(d *csicommon.CSIDriver, containerized bool) (*nodeServer, error) {
mounter := mount.New("")
if containerized {
ne, err := nsenter.NewNsenter(nsenter.DefaultHostRootFsPath, exec.New())
if err != nil {
return nil, err
}
mounter = mount.NewNsenterMounter("", ne)
}
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return &nodeServer{
DefaultNodeServer: csicommon.NewDefaultNodeServer(d),
mounter: mounter,
}, nil
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}
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func (rbd *rbd) Run(driverName, nodeID, endpoint string, containerized bool, cachePersister util.CachePersister) {
var err error
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glog.Infof("Driver: %v version: %v", driverName, version)
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// Initialize default library driver
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rbd.driver = csicommon.NewCSIDriver(driverName, version, nodeID)
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if rbd.driver == nil {
glog.Fatalln("Failed to initialize CSI Driver.")
}
rbd.driver.AddControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{
csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
csi.ControllerServiceCapability_RPC_PUBLISH_UNPUBLISH_VOLUME,
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
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})
rbd.driver.AddVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER})
// Create GRPC servers
rbd.ids = NewIdentityServer(rbd.driver)
rbd.ns, err = NewNodeServer(rbd.driver, containerized)
if err != nil {
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glog.Fatalf("failed to start node server, err %v\n", err)
}
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rbd.cs = NewControllerServer(rbd.driver, cachePersister)
rbd.cs.LoadExDataFromMetadataStore()
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s := csicommon.NewNonBlockingGRPCServer()
s.Start(endpoint, rbd.ids, rbd.cs, rbd.ns)
s.Wait()
}