mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 00:10:20 +00:00
286 lines
8.3 KiB
Go
286 lines
8.3 KiB
Go
/*
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Copyright 2019 The Ceph-CSI 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 util
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import (
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"bytes"
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"strings"
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"github.com/ceph/go-ceph/rados"
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"k8s.io/klog"
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)
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// InvalidPoolID used to denote an invalid pool
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const InvalidPoolID int64 = -1
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// ExecCommand executes passed in program with args and returns separate stdout and stderr streams
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func ExecCommand(program string, args ...string) (stdout, stderr []byte, err error) {
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var (
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cmd = exec.Command(program, args...) // nolint: gosec, #nosec
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sanitizedArgs = StripSecretInArgs(args)
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stdoutBuf bytes.Buffer
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stderrBuf bytes.Buffer
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)
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cmd.Stdout = &stdoutBuf
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cmd.Stderr = &stderrBuf
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if err := cmd.Run(); err != nil {
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return stdoutBuf.Bytes(), stderrBuf.Bytes(), fmt.Errorf("an error (%v)"+
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" occurred while running %s args: %v", err, program, sanitizedArgs)
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}
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return stdoutBuf.Bytes(), nil, nil
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}
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// GetPoolID fetches the ID of the pool that matches the passed in poolName
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// parameter
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func GetPoolID(monitors string, cr *Credentials, poolName string) (int64, error) {
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conn, err := connPool.Get(monitors, cr.ID, cr.KeyFile)
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if err != nil {
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return InvalidPoolID, err
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}
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defer connPool.Put(conn)
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id, err := conn.GetPoolByName(poolName)
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if err == rados.ErrNotFound {
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return InvalidPoolID, ErrPoolNotFound{poolName, fmt.Errorf("pool (%s) not found in Ceph cluster", poolName)}
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} else if err != nil {
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return InvalidPoolID, err
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}
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return id, nil
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}
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// GetPoolName fetches the pool whose pool ID is equal to the requested poolID
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// parameter
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func GetPoolName(monitors string, cr *Credentials, poolID int64) (string, error) {
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conn, err := connPool.Get(monitors, cr.ID, cr.KeyFile)
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if err != nil {
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return "", err
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}
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defer connPool.Put(conn)
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name, err := conn.GetPoolByID(poolID)
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if err != nil {
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return "", ErrPoolNotFound{string(poolID), fmt.Errorf("pool ID (%d) not found in Ceph cluster", poolID)}
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}
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return name, nil
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}
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// GetPoolIDs searches a list of pools in a cluster and returns the IDs of the pools that matches
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// the passed in pools
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// TODO this should take in a list and return a map[string(poolname)]int64(poolID)
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func GetPoolIDs(ctx context.Context, monitors, journalPool, imagePool string, cr *Credentials) (int64, int64, error) {
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journalPoolID, err := GetPoolID(monitors, cr, journalPool)
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if err != nil {
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return InvalidPoolID, InvalidPoolID, err
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}
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imagePoolID := journalPoolID
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if imagePool != journalPool {
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imagePoolID, err = GetPoolID(monitors, cr, imagePool)
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if err != nil {
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return InvalidPoolID, InvalidPoolID, err
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}
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}
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return journalPoolID, imagePoolID, nil
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}
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// SetOMapKeyValue sets the given key and value into the provided Ceph omap name
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func SetOMapKeyValue(ctx context.Context, monitors string, cr *Credentials, poolName, namespace, oMapName, oMapKey, keyValue string) error {
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// Command: "rados <options> setomapval oMapName oMapKey keyValue"
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args := []string{
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"-m", monitors,
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"--id", cr.ID,
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"--keyfile=" + cr.KeyFile,
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"-c", CephConfigPath,
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"-p", poolName,
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"setomapval", oMapName, oMapKey, keyValue,
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}
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if namespace != "" {
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args = append(args, "--namespace="+namespace)
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}
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_, _, err := ExecCommand("rados", args[:]...)
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if err != nil {
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klog.Errorf(Log(ctx, "failed adding key (%s with value %s), to omap (%s) in "+
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"pool (%s): (%v)"), oMapKey, keyValue, oMapName, poolName, err)
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return err
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}
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return nil
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}
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// GetOMapValue gets the value for the given key from the named omap
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func GetOMapValue(ctx context.Context, monitors string, cr *Credentials, poolName, namespace, oMapName, oMapKey string) (string, error) {
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// Command: "rados <options> getomapval oMapName oMapKey <outfile>"
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// No such key: replicapool/csi.volumes.directory.default/csi.volname
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tmpFile, err := ioutil.TempFile("", "omap-get-")
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if err != nil {
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klog.Errorf(Log(ctx, "failed creating a temporary file for key contents"))
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return "", err
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}
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defer tmpFile.Close()
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defer os.Remove(tmpFile.Name())
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args := []string{
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"-m", monitors,
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"--id", cr.ID,
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"--keyfile=" + cr.KeyFile,
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"-c", CephConfigPath,
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"-p", poolName,
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"getomapval", oMapName, oMapKey, tmpFile.Name(),
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}
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if namespace != "" {
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args = append(args, "--namespace="+namespace)
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}
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stdout, stderr, err := ExecCommand("rados", args[:]...)
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if err != nil {
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// no logs, as attempting to check for non-existent key/value is done even on
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// regular call sequences
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stdoutanderr := strings.Join([]string{string(stdout), string(stderr)}, " ")
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if strings.Contains(stdoutanderr, "No such key: "+poolName+"/"+oMapName+"/"+oMapKey) {
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return "", ErrKeyNotFound{poolName + "/" + oMapName + "/" + oMapKey, err}
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}
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if strings.Contains(stdoutanderr, "error getting omap value "+
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poolName+"/"+oMapName+"/"+oMapKey+": (2) No such file or directory") {
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return "", ErrKeyNotFound{poolName + "/" + oMapName + "/" + oMapKey, err}
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}
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if strings.Contains(stdoutanderr, "error opening pool "+
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poolName+": (2) No such file or directory") {
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return "", ErrPoolNotFound{poolName, err}
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}
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// log other errors for troubleshooting assistance
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klog.Errorf(Log(ctx, "failed getting omap value for key (%s) from omap (%s) in pool (%s): (%v)"),
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oMapKey, oMapName, poolName, err)
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return "", fmt.Errorf("error (%v) occurred, command output streams is (%s)",
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err.Error(), stdoutanderr)
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}
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keyValue, err := ioutil.ReadAll(tmpFile)
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return string(keyValue), err
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}
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// RemoveOMapKey removes the omap key from the given omap name
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func RemoveOMapKey(ctx context.Context, monitors string, cr *Credentials, poolName, namespace, oMapName, oMapKey string) error {
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// Command: "rados <options> rmomapkey oMapName oMapKey"
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args := []string{
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"-m", monitors,
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"--id", cr.ID,
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"--keyfile=" + cr.KeyFile,
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"-c", CephConfigPath,
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"-p", poolName,
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"rmomapkey", oMapName, oMapKey,
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}
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if namespace != "" {
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args = append(args, "--namespace="+namespace)
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}
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_, _, err := ExecCommand("rados", args[:]...)
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if err != nil {
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// NOTE: Missing omap key removal does not return an error
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klog.Errorf(Log(ctx, "failed removing key (%s), from omap (%s) in "+
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"pool (%s): (%v)"), oMapKey, oMapName, poolName, err)
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return err
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}
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return nil
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}
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// CreateObject creates the object name passed in and returns ErrObjectExists if the provided object
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// is already present in rados
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func CreateObject(ctx context.Context, monitors string, cr *Credentials, poolName, namespace, objectName string) error {
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conn := ClusterConnection{}
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err := conn.Connect(monitors, cr)
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if err != nil {
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return err
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}
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defer conn.Destroy()
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ioctx, err := conn.GetIoctx(poolName)
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if err != nil {
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if _, ok := err.(ErrPoolNotFound); ok {
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err = ErrObjectNotFound{poolName, err}
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}
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return err
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}
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defer ioctx.Destroy()
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if namespace != "" {
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ioctx.SetNamespace(namespace)
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}
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err = ioctx.Create(objectName, rados.CreateExclusive)
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if err == rados.ErrObjectExists {
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return ErrObjectExists{objectName, err}
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} else if err != nil {
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klog.Errorf(Log(ctx, "failed creating omap (%s) in pool (%s): (%v)"), objectName, poolName, err)
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return err
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}
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return nil
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}
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// RemoveObject removes the entire omap name passed in and returns ErrObjectNotFound is provided omap
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// is not found in rados
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func RemoveObject(ctx context.Context, monitors string, cr *Credentials, poolName, namespace, oMapName string) error {
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conn := ClusterConnection{}
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err := conn.Connect(monitors, cr)
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if err != nil {
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return err
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}
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defer conn.Destroy()
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ioctx, err := conn.GetIoctx(poolName)
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if err != nil {
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if _, ok := err.(ErrPoolNotFound); ok {
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err = ErrObjectNotFound{poolName, err}
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}
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return err
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}
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defer ioctx.Destroy()
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if namespace != "" {
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ioctx.SetNamespace(namespace)
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}
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err = ioctx.Delete(oMapName)
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if err == rados.ErrNotFound {
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return ErrObjectNotFound{oMapName, err}
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} else if err != nil {
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klog.Errorf(Log(ctx, "failed removing omap (%s) in pool (%s): (%v)"), oMapName, poolName, err)
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return err
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}
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return nil
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}
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