mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 08:20:23 +00:00
492 lines
14 KiB
Go
492 lines
14 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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"fmt"
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"os/exec"
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"strings"
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"time"
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"github.com/golang/glog"
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"github.com/pkg/errors"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/kubernetes/pkg/util/keymutex"
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)
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const (
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imageWatcherStr = "watcher="
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rbdImageFormat1 = "1"
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rbdImageFormat2 = "2"
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imageSizeStr = "size "
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sizeDivStr = " MB in"
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kubeLockMagic = "kubelet_lock_magic_"
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// The following three values are used for 30 seconds timeout
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// while waiting for RBD Watcher to expire.
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rbdImageWatcherInitDelay = 1 * time.Second
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rbdImageWatcherFactor = 1.4
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rbdImageWatcherSteps = 10
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rbdDefaultMounter = "rbd"
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)
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type rbdVolume struct {
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VolName string `json:"volName"`
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VolID string `json:"volID"`
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Monitors string `json:"monitors"`
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MonValueFromSecret string `json:"monValueFromSecret"`
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Pool string `json:"pool"`
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ImageFormat string `json:"imageFormat"`
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ImageFeatures string `json:"imageFeatures"`
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VolSize int64 `json:"volSize"`
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AdminId string `json:"adminId"`
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UserId string `json:"userId"`
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Mounter string `json:"mounter"`
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}
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type rbdSnapshot struct {
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SourceVolumeID string `json:"sourceVolumeID"`
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VolName string `json:"volName"`
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SnapName string `json:"snapName"`
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SnapID string `json:"sanpID"`
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Monitors string `json:"monitors"`
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MonValueFromSecret string `json:"monValueFromSecret"`
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Pool string `json:"pool"`
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CreatedAt int64 `json:"createdAt"`
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SizeBytes int64 `json:"sizeBytes"`
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AdminId string `json:"adminId"`
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UserId string `json:"userId"`
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}
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var (
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// serializes operations based on "<rbd pool>/<rbd image>" as key
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attachdetachMutex = keymutex.NewHashed(0)
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// serializes operations based on "volume name" as key
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volumeNameMutex = keymutex.NewHashed(0)
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// serializes operations based on "volume id" as key
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volumeIDMutex = keymutex.NewHashed(0)
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// serializes operations based on "snapshot name" as key
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snapshotNameMutex = keymutex.NewHashed(0)
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// serializes operations based on "snapshot id" as key
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snapshotIDMutex = keymutex.NewHashed(0)
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// serializes operations based on "mount target path" as key
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targetPathMutex = keymutex.NewHashed(0)
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supportedFeatures = sets.NewString("layering")
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)
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func getRBDKey(id string, credentials map[string]string) (string, error) {
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if key, ok := credentials[id]; ok {
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return key, nil
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}
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return "", fmt.Errorf("RBD key for ID: %s not found", id)
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}
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func getMon(pOpts *rbdVolume, credentials map[string]string) (string, error) {
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mon := pOpts.Monitors
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if len(mon) == 0 {
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// if mons are set in secret, retrieve them
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if len(pOpts.MonValueFromSecret) == 0 {
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// yet another sanity check
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return "", errors.New("either monitors or monValueFromSecret must be set")
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}
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val, ok := credentials[pOpts.MonValueFromSecret]
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if !ok {
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return "", fmt.Errorf("mon data %s is not set in secret", pOpts.MonValueFromSecret)
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}
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mon = val
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}
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return mon, nil
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}
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// CreateImage creates a new ceph image with provision and volume options.
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func createRBDImage(pOpts *rbdVolume, volSz int, adminId string, credentials map[string]string) error {
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var output []byte
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mon, err := getMon(pOpts, credentials)
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if err != nil {
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return err
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}
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image := pOpts.VolName
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volSzGB := fmt.Sprintf("%dG", volSz)
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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if pOpts.ImageFormat == rbdImageFormat2 {
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glog.V(4).Infof("rbd: create %s size %s format %s (features: %s) using mon %s, pool %s id %s key %s", image, volSzGB, pOpts.ImageFormat, pOpts.ImageFeatures, mon, pOpts.Pool, adminId, key)
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} else {
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glog.V(4).Infof("rbd: create %s size %s format %s using mon %s, pool %s id %s key %s", image, volSzGB, pOpts.ImageFormat, mon, pOpts.Pool, adminId, key)
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}
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args := []string{"create", image, "--size", volSzGB, "--pool", pOpts.Pool, "--id", adminId, "-m", mon, "--key=" + key, "--image-format", pOpts.ImageFormat}
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if pOpts.ImageFormat == rbdImageFormat2 {
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args = append(args, "--image-feature", pOpts.ImageFeatures)
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}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to create rbd image, command output: %s", string(output))
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}
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return nil
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}
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// rbdStatus checks if there is watcher on the image.
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// It returns true if there is a watcher onthe image, otherwise returns false.
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func rbdStatus(pOpts *rbdVolume, userId string, credentials map[string]string) (bool, string, error) {
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var output string
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var cmd []byte
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image := pOpts.VolName
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// If we don't have admin id/secret (e.g. attaching), fallback to user id/secret.
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key, err := getRBDKey(userId, credentials)
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if err != nil {
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return false, "", err
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}
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mon, err := getMon(pOpts, credentials)
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if err != nil {
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return false, "", err
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}
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glog.V(4).Infof("rbd: status %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, userId, key)
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args := []string{"status", image, "--pool", pOpts.Pool, "-m", mon, "--id", userId, "--key=" + key}
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cmd, err = execCommand("rbd", args)
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output = string(cmd)
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if err, ok := err.(*exec.Error); ok {
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if err.Err == exec.ErrNotFound {
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glog.Errorf("rbd cmd not found")
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// fail fast if command not found
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return false, output, err
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}
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}
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// If command never succeed, returns its last error.
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if err != nil {
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return false, output, err
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}
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if strings.Contains(output, imageWatcherStr) {
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glog.V(4).Infof("rbd: watchers on %s: %s", image, output)
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return true, output, nil
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}
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glog.Warningf("rbd: no watchers on %s", image)
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return false, output, nil
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}
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// DeleteImage deletes a ceph image with provision and volume options.
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func deleteRBDImage(pOpts *rbdVolume, adminId string, credentials map[string]string) error {
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var output []byte
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image := pOpts.VolName
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found, _, err := rbdStatus(pOpts, adminId, credentials)
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if err != nil {
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return err
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}
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if found {
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glog.Info("rbd is still being used ", image)
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return fmt.Errorf("rbd %s is still being used", image)
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}
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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mon, err := getMon(pOpts, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: rm %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, adminId, key)
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args := []string{"rm", image, "--pool", pOpts.Pool, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err == nil {
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return nil
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}
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glog.Errorf("failed to delete rbd image: %v, command output: %s", err, string(output))
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return err
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}
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func execCommand(command string, args []string) ([]byte, error) {
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cmd := exec.Command(command, args...)
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return cmd.CombinedOutput()
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}
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func getRBDVolumeOptions(volOptions map[string]string) (*rbdVolume, error) {
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var ok bool
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rbdVol := &rbdVolume{}
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rbdVol.Pool, ok = volOptions["pool"]
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if !ok {
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return nil, fmt.Errorf("Missing required parameter pool")
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}
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rbdVol.Monitors, ok = volOptions["monitors"]
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if !ok {
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// if mons are not set in options, check if they are set in secret
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if rbdVol.MonValueFromSecret, ok = volOptions["monValueFromSecret"]; !ok {
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return nil, fmt.Errorf("Either monitors or monValueFromSecret must be set")
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}
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}
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rbdVol.ImageFormat, ok = volOptions["imageFormat"]
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if !ok {
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rbdVol.ImageFormat = rbdImageFormat2
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}
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if rbdVol.ImageFormat == rbdImageFormat2 {
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// if no image features is provided, it results in empty string
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// which disable all RBD image format 2 features as we expected
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imageFeatures, ok := volOptions["imageFeatures"]
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if ok {
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arr := strings.Split(imageFeatures, ",")
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for _, f := range arr {
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if !supportedFeatures.Has(f) {
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return nil, fmt.Errorf("invalid feature %q for volume csi-rbdplugin, supported features are: %v", f, supportedFeatures)
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}
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}
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rbdVol.ImageFeatures = imageFeatures
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}
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}
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rbdVol.AdminId, ok = volOptions["adminid"]
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if !ok {
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rbdVol.AdminId = rbdDefaultAdminId
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}
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rbdVol.UserId, ok = volOptions["userid"]
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if !ok {
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rbdVol.UserId = rbdDefaultUserId
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}
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rbdVol.Mounter, ok = volOptions["mounter"]
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if !ok {
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rbdVol.Mounter = rbdDefaultMounter
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}
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return rbdVol, nil
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}
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func getRBDSnapshotOptions(snapOptions map[string]string) (*rbdSnapshot, error) {
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var ok bool
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rbdSnap := &rbdSnapshot{}
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rbdSnap.Pool, ok = snapOptions["pool"]
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if !ok {
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return nil, fmt.Errorf("Missing required parameter pool")
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}
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rbdSnap.Monitors, ok = snapOptions["monitors"]
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if !ok {
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// if mons are not set in options, check if they are set in secret
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if rbdSnap.MonValueFromSecret, ok = snapOptions["monValueFromSecret"]; !ok {
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return nil, fmt.Errorf("Either monitors or monValueFromSecret must be set")
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}
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}
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rbdSnap.AdminId, ok = snapOptions["adminid"]
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if !ok {
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rbdSnap.AdminId = rbdDefaultAdminId
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}
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rbdSnap.UserId, ok = snapOptions["userid"]
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if !ok {
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rbdSnap.UserId = rbdDefaultUserId
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}
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return rbdSnap, nil
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}
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func hasSnapshotFeature(imageFeatures string) bool {
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arr := strings.Split(imageFeatures, ",")
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for _, f := range arr {
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if f == "layering" {
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return true
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}
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}
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return false
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}
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func getRBDVolumeByID(volumeID string) (*rbdVolume, error) {
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if rbdVol, ok := rbdVolumes[volumeID]; ok {
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return rbdVol, nil
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}
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return nil, fmt.Errorf("volume id %s does not exit in the volumes list", volumeID)
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}
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func getRBDVolumeByName(volName string) (*rbdVolume, error) {
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for _, rbdVol := range rbdVolumes {
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if rbdVol.VolName == volName {
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return rbdVol, nil
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}
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}
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return nil, fmt.Errorf("volume name %s does not exit in the volumes list", volName)
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}
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func getRBDSnapshotByName(snapName string) (*rbdSnapshot, error) {
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for _, rbdSnap := range rbdSnapshots {
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if rbdSnap.SnapName == snapName {
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return rbdSnap, nil
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}
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}
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return nil, fmt.Errorf("snapshot name %s does not exit in the snapshots list", snapName)
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}
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func getSnapMon(pOpts *rbdSnapshot, credentials map[string]string) (string, error) {
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mon := pOpts.Monitors
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if len(mon) == 0 {
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// if mons are set in secret, retrieve them
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if len(pOpts.MonValueFromSecret) == 0 {
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// yet another sanity check
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return "", errors.New("either monitors or monValueFromSecret must be set")
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}
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val, ok := credentials[pOpts.MonValueFromSecret]
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if !ok {
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return "", fmt.Errorf("mon data %s is not set in secret", pOpts.MonValueFromSecret)
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}
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mon = val
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}
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return mon, nil
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}
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func protectSnapshot(pOpts *rbdSnapshot, adminId string, credentials map[string]string) error {
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var output []byte
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image := pOpts.VolName
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snapID := pOpts.SnapID
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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mon, err := getSnapMon(pOpts, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: snap protect %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, adminId, key)
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args := []string{"snap", "protect", "--pool", pOpts.Pool, "--snap", snapID, image, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to protect snapshot, command output: %s", string(output))
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}
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return nil
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}
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func createSnapshot(pOpts *rbdSnapshot, adminId string, credentials map[string]string) error {
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var output []byte
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mon, err := getSnapMon(pOpts, credentials)
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if err != nil {
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return err
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}
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image := pOpts.VolName
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snapID := pOpts.SnapID
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: snap create %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, adminId, key)
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args := []string{"snap", "create", "--pool", pOpts.Pool, "--snap", snapID, image, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to create snapshot, command output: %s", string(output))
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}
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return nil
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}
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func unprotectSnapshot(pOpts *rbdSnapshot, adminId string, credentials map[string]string) error {
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var output []byte
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mon, err := getSnapMon(pOpts, credentials)
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if err != nil {
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return err
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}
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image := pOpts.VolName
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snapID := pOpts.SnapID
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: snap unprotect %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, adminId, key)
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args := []string{"snap", "unprotect", "--pool", pOpts.Pool, "--snap", snapID, image, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to unprotect snapshot, command output: %s", string(output))
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}
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return nil
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}
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func deleteSnapshot(pOpts *rbdSnapshot, adminId string, credentials map[string]string) error {
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var output []byte
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mon, err := getSnapMon(pOpts, credentials)
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if err != nil {
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return err
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}
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image := pOpts.VolName
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snapID := pOpts.SnapID
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: snap rm %s using mon %s, pool %s id %s key %s", image, mon, pOpts.Pool, adminId, key)
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args := []string{"snap", "rm", "--pool", pOpts.Pool, "--snap", snapID, image, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to delete snapshot, command output: %s", string(output))
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}
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return nil
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}
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func restoreSnapshot(pVolOpts *rbdVolume, pSnapOpts *rbdSnapshot, adminId string, credentials map[string]string) error {
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var output []byte
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mon, err := getMon(pVolOpts, credentials)
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if err != nil {
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return err
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}
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image := pVolOpts.VolName
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snapID := pSnapOpts.SnapID
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key, err := getRBDKey(adminId, credentials)
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if err != nil {
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return err
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}
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glog.V(4).Infof("rbd: clone %s using mon %s, pool %s id %s key %s", image, mon, pVolOpts.Pool, adminId, key)
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args := []string{"clone", pSnapOpts.Pool + "/" + pSnapOpts.VolName + "@" + snapID, pVolOpts.Pool + "/" + image, "--id", adminId, "-m", mon, "--key=" + key}
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output, err = execCommand("rbd", args)
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if err != nil {
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return errors.Wrapf(err, "failed to restore snapshot, command output: %s", string(output))
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}
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return nil
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}
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