feature: support external-health-monitor #210
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,202 @@ | ||
| package hostpath | ||
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||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "strings" | ||
|
|
||
| "github.com/golang/glog" | ||
| fs "k8s.io/kubernetes/pkg/volume/util/fs" | ||
| ) | ||
|
|
||
| const ( | ||
| podVolumeTargetPath = "/var/lib/kubelet/pods" | ||
| csiSignOfVolumeTargetPath = "kubernetes.io~csi/pvc" | ||
| ) | ||
|
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||
| type MountPointInfo struct { | ||
| Target string `json:"target"` | ||
| Source string `json:"source"` | ||
| FsType string `json:"fstype"` | ||
| Options string `json:"options"` | ||
| ContainerFileSystem []MountPointInfo `json:"children,omitempty"` | ||
| } | ||
|
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| type ContainerFileSystem struct { | ||
| Children []MountPointInfo `json:"children"` | ||
| } | ||
|
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| type FileSystems struct { | ||
| Filsystem []ContainerFileSystem `json:"filesystems"` | ||
| } | ||
|
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| func locateCommandPath(commandName string) string { | ||
| // default to root | ||
| binary := filepath.Join("/", commandName) | ||
| for _, path := range []string{"/bin", "/usr/sbin", "/usr/bin"} { | ||
| binPath := filepath.Join(path, binary) | ||
| if _, err := os.Stat(binPath); err != nil { | ||
| continue | ||
| } | ||
|
|
||
| return binPath | ||
| } | ||
|
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| return "" | ||
| } | ||
|
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| func getSourcePath(volumeHandle string) string { | ||
| return fmt.Sprintf("%s/%s", dataRoot, volumeHandle) | ||
| } | ||
|
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| func checkSourcePathExist(volumeHandle string) (bool, error) { | ||
| sourcePath := getSourcePath(volumeHandle) | ||
| glog.V(3).Infof("Volume: %s Source path is: %s", volumeHandle, sourcePath) | ||
| _, err := os.Stat(sourcePath) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| return false, nil | ||
| } | ||
|
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| return false, err | ||
| } | ||
|
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| return true, nil | ||
| } | ||
|
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| func parseMountInfo(originalMountInfo []byte) ([]MountPointInfo, error) { | ||
| fs := FileSystems{ | ||
| Filsystem: make([]ContainerFileSystem, 0), | ||
| } | ||
|
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| if err := json.Unmarshal(originalMountInfo, &fs); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if len(fs.Filsystem) <= 0 { | ||
| return nil, fmt.Errorf("failed to get mount info") | ||
| } | ||
|
|
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| return fs.Filsystem[0].Children, nil | ||
| } | ||
|
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| func checkMountPointExist(sourcePath string) (bool, error) { | ||
| cmdPath := locateCommandPath("findmnt") | ||
| out, err := exec.Command(cmdPath, "--json").CombinedOutput() | ||
| if err != nil { | ||
| glog.V(3).Infof("failed to execute command: %+v", cmdPath) | ||
| return false, err | ||
| } | ||
|
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| if len(out) < 1 { | ||
| return false, fmt.Errorf("mount point info is nil") | ||
| } | ||
|
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| mountInfos, err := parseMountInfo([]byte(out)) | ||
| if err != nil { | ||
| return false, fmt.Errorf("failed to parse the mount infos: %+v", err) | ||
| } | ||
|
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| mountInfosOfPod := MountPointInfo{} | ||
| for _, mountInfo := range mountInfos { | ||
| if mountInfo.Target == podVolumeTargetPath { | ||
| mountInfosOfPod = mountInfo | ||
| break | ||
| } | ||
| } | ||
|
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||
| for _, mountInfo := range mountInfosOfPod.ContainerFileSystem { | ||
| if !strings.Contains(mountInfo.Source, sourcePath) { | ||
| continue | ||
| } | ||
|
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| _, err = os.Stat(mountInfo.Target) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| return false, nil | ||
| } | ||
|
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| return false, err | ||
| } | ||
|
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| return true, nil | ||
| } | ||
|
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| return false, nil | ||
| } | ||
|
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| func checkPVCapacityValid(volumeHandle string) (bool, error) { | ||
| sourcePath := getSourcePath(volumeHandle) | ||
| _, fscapacity, _, _, _, _, err := fs.FsInfo(sourcePath) | ||
| if err != nil { | ||
| return false, fmt.Errorf("failed to get capacity info: %+v", err) | ||
| } | ||
|
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| volumeCapacity := hostPathVolumes[volumeHandle].VolSize | ||
| glog.V(3).Infof("volume capacity: %+v fs capacity:%+v", volumeCapacity, fscapacity) | ||
| return fscapacity >= volumeCapacity, nil | ||
| } | ||
|
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| func getPVCapacity(volumeHandle string) (int64, int64, int64, error) { | ||
| sourcePath := getSourcePath(volumeHandle) | ||
| fsavailable, fscapacity, fsused, _, _, _, err := fs.FsInfo(sourcePath) | ||
| return fscapacity, fsused, fsavailable, err | ||
| } | ||
|
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| func checkPVUsage(volumeHandle string) (bool, error) { | ||
| sourcePath := getSourcePath(volumeHandle) | ||
| fsavailable, _, _, _, _, _, err := fs.FsInfo(sourcePath) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
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| glog.V(3).Infof("fs available: %+v", fsavailable) | ||
| return fsavailable > 0, nil | ||
| } | ||
|
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| func doHealthCheckInControllerSide(volumeHandle string) (bool, string) { | ||
| spExist, err := checkSourcePathExist(volumeHandle) | ||
| if err != nil { | ||
| return false, err.Error() | ||
| } | ||
|
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| if !spExist { | ||
| return false, "The source path of the volume doesn't exist" | ||
| } | ||
|
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| capValid, err := checkPVCapacityValid(volumeHandle) | ||
| if err != nil { | ||
| return false, err.Error() | ||
| } | ||
|
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| if !capValid { | ||
| return false, "The capacity of volume is greater than actual storage" | ||
| } | ||
|
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| available, err := checkPVUsage(volumeHandle) | ||
| if err != nil { | ||
| return false, err.Error() | ||
| } | ||
|
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| if !available { | ||
| return false, "The free space of the volume is insufficient" | ||
| } | ||
|
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| return true, "" | ||
| } | ||
|
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| func doHealthCheckInNodeSide(volumeHandle string) (bool, string) { | ||
| mpExist, err := checkMountPointExist(volumeHandle) | ||
| if err != nil { | ||
| return false, err.Error() | ||
| } | ||
|
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| if !mpExist { | ||
| return false, "The volume isn't mounted" | ||
| } | ||
|
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| return true, "" | ||
| } |
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How is this related to "support external-health-monitor"?
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When I implement this feature, I found I need run findmnt command with
jsonargument. It was supported in newer version. So, I update it