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cm metadata persist for rbd and cephfs

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This commit is contained in:
mickymiek
2018-12-19 15:26:16 +01:00
committed by Huamin Chen
parent 51d6ac6f55
commit 62d65ad0cb
15 changed files with 467 additions and 385 deletions
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105
pkg/rbd/rbd.go
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@ -17,14 +17,9 @@ limitations under the License.
package rbd
import (
"encoding/json"
"io/ioutil"
"os"
"path"
"strings"
"github.com/golang/glog"
"github.com/ceph/ceph-csi/pkg/util"
"github.com/container-storage-interface/spec/lib/go/csi/v0"
"github.com/kubernetes-csi/drivers/pkg/csi-common"
@ -56,94 +51,6 @@ var (
version = "0.3.0"
)
var rbdVolumes map[string]*rbdVolume
var rbdSnapshots map[string]*rbdSnapshot
// Init checks for the persistent volume file and loads all found volumes
// into a memory structure
func init() {
rbdVolumes = map[string]*rbdVolume{}
rbdSnapshots = map[string]*rbdSnapshot{}
if _, err := os.Stat(path.Join(PluginFolder, "controller")); os.IsNotExist(err) {
glog.Infof("rbd: folder %s not found. Creating... \n", path.Join(PluginFolder, "controller"))
if err := os.Mkdir(path.Join(PluginFolder, "controller"), 0755); err != nil {
glog.Fatalf("Failed to create a controller's volumes folder with error: %v\n", err)
}
} else {
// Since "controller" folder exists, it means the rbdplugin has already been running, it means
// there might be some volumes left, they must be re-inserted into rbdVolumes map
loadExVolumes()
}
if _, err := os.Stat(path.Join(PluginFolder, "controller-snap")); os.IsNotExist(err) {
glog.Infof("rbd: folder %s not found. Creating... \n", path.Join(PluginFolder, "controller-snap"))
if err := os.Mkdir(path.Join(PluginFolder, "controller-snap"), 0755); err != nil {
glog.Fatalf("Failed to create a controller's snapshots folder with error: %v\n", err)
}
} else {
// Since "controller-snap" folder exists, it means the rbdplugin has already been running, it means
// there might be some snapshots left, they must be re-inserted into rbdSnapshots map
loadExSnapshots()
}
}
// loadExSnapshots check for any *.json files in the PluginFolder/controller-snap folder
// and loads then into rbdSnapshots map
func loadExSnapshots() {
rbdSnap := rbdSnapshot{}
files, err := ioutil.ReadDir(path.Join(PluginFolder, "controller-snap"))
if err != nil {
glog.Infof("rbd: failed to read controller's snapshots folder: %s error:%v", path.Join(PluginFolder, "controller-snap"), err)
return
}
for _, f := range files {
if !strings.HasSuffix(f.Name(), ".json") {
continue
}
fp, err := os.Open(path.Join(PluginFolder, "controller-snap", f.Name()))
if err != nil {
glog.Infof("rbd: open file: %s err %%v", f.Name(), err)
continue
}
decoder := json.NewDecoder(fp)
if err = decoder.Decode(&rbdSnap); err != nil {
glog.Infof("rbd: decode file: %s err: %v", f.Name(), err)
fp.Close()
continue
}
rbdSnapshots[rbdSnap.SnapID] = &rbdSnap
}
glog.Infof("rbd: Loaded %d snapshots from %s", len(rbdSnapshots), path.Join(PluginFolder, "controller-snap"))
}
// loadExVolumes check for any *.json files in the PluginFolder/controller folder
// and loads then into rbdVolumes map
func loadExVolumes() {
rbdVol := rbdVolume{}
files, err := ioutil.ReadDir(path.Join(PluginFolder, "controller"))
if err != nil {
glog.Infof("rbd: failed to read controller's volumes folder: %s error:%v", path.Join(PluginFolder, "controller"), err)
return
}
for _, f := range files {
if !strings.HasSuffix(f.Name(), ".json") {
continue
}
fp, err := os.Open(path.Join(PluginFolder, "controller", f.Name()))
if err != nil {
glog.Infof("rbd: open file: %s err %%v", f.Name(), err)
continue
}
decoder := json.NewDecoder(fp)
if err = decoder.Decode(&rbdVol); err != nil {
glog.Infof("rbd: decode file: %s err: %v", f.Name(), err)
fp.Close()
continue
}
rbdVolumes[rbdVol.VolID] = &rbdVol
}
glog.Infof("rbd: Loaded %d volumes from %s", len(rbdVolumes), path.Join(PluginFolder, "controller"))
}
func GetRBDDriver() *rbd {
return &rbd{}
}
@ -154,9 +61,10 @@ func NewIdentityServer(d *csicommon.CSIDriver) *identityServer {
}
}
func NewControllerServer(d *csicommon.CSIDriver) *controllerServer {
func NewControllerServer(d *csicommon.CSIDriver, cachePersister util.CachePersister) *controllerServer {
return &controllerServer{
DefaultControllerServer: csicommon.NewDefaultControllerServer(d),
MetadataStore: cachePersister,
}
}
@ -175,7 +83,7 @@ func NewNodeServer(d *csicommon.CSIDriver, containerized bool) (*nodeServer, err
}, nil
}
func (rbd *rbd) Run(driverName, nodeID, endpoint string, containerized bool) {
func (rbd *rbd) Run(driverName, nodeID, endpoint string, containerized bool, cachePersister util.CachePersister) {
var err error
glog.Infof("Driver: %v version: %v", driverName, version)
@ -198,7 +106,10 @@ func (rbd *rbd) Run(driverName, nodeID, endpoint string, containerized bool) {
if err != nil {
glog.Fatalln("failed to start node server, err %v", err)
}
rbd.cs = NewControllerServer(rbd.driver)
rbd.cs = NewControllerServer(rbd.driver, cachePersister)
rbd.cs.LoadExDataFromMetadataStore()
s := csicommon.NewNonBlockingGRPCServer()
s.Start(endpoint, rbd.ids, rbd.cs, rbd.ns)
s.Wait()