ceph-csi/pkg/cephfs/util.go

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/*
Copyright 2018 The Ceph-CSI Authors.
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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 cephfs
import (
"bytes"
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"encoding/json"
"errors"
"fmt"
"os"
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"os/exec"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/klog"
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"github.com/ceph/ceph-csi/pkg/util"
"github.com/container-storage-interface/spec/lib/go/csi"
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"k8s.io/kubernetes/pkg/util/mount"
)
type volumeID string
func execCommand(program string, args ...string) (stdout, stderr []byte, err error) {
var (
cmd = exec.Command(program, args...) // nolint: gosec
sanitizedArgs = util.StripSecretInArgs(args)
stdoutBuf bytes.Buffer
stderrBuf bytes.Buffer
)
cmd.Stdout = &stdoutBuf
cmd.Stderr = &stderrBuf
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klog.V(4).Infof("cephfs: EXEC %s %s", program, sanitizedArgs)
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if err := cmd.Run(); err != nil {
return nil, nil, fmt.Errorf("an error occurred while running (%d) %s %v: %v: %s",
cmd.Process.Pid, program, sanitizedArgs, err, stderrBuf.Bytes())
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}
return stdoutBuf.Bytes(), stderrBuf.Bytes(), nil
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}
func execCommandErr(program string, args ...string) error {
_, _, err := execCommand(program, args...)
return err
}
Make CephFS plugin stateless reusing RADOS based journal scheme This is a part of the stateless set of commits for CephCSI. This commit removes the dependency on config maps to store cephFS provisioned volumes, and instead relies on RADOS based objects and keys, and required CSI VolumeID encoding to detect the provisioned volumes. Changes: - Provide backward compatibility to provisioned volumes by older plugin versions (1.0.0 or older) - Remove Create/Delete support for statically provisioned volumes (fixes #382) - Added namespace support to RADOS OMaps and used the same to store RADOS CSI objects and keys in the CephFS metadata pool - Added support to mention fsname for CephFS provisioning (fixes #359) - Changed field name in CSI Identifier to 'location', to denote a pool or fscid - Updated mounter cache to use new scheme - Required Helm manifests are updated - Required documentation and other manifests are updated - Made driver option 'metadatastorage' as optional, as fresh installs do not need to specify the same Testing done: - Create/Mount/Delete PVC - Create/Delete 5 PVCs - Mount version 1.0.0 PVC - Delete version 1.0.0 PV - Mount Statically defined PV/PVC/Pod - Mount Statically defined version 1.0.0 PV/PVC/Pod - Delete Statically defined version 1.0.0 PV/PVC/Pod - Node restart when mounted to test mountcache - Use InstanceID other than 'default' - RBD basic round of tests, as namespace is added to OMaps - csitest against ceph-fs plugin - NOTE: CephFS plugin still does not detect and address already created volumes but of a different size - Test not providing any value to the metadata storage parameter Signed-off-by: ShyamsundarR <srangana@redhat.com>
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//nolint: unparam
func execCommandJSON(v interface{}, program string, args ...string) error {
stdout, _, err := execCommand(program, args...)
if err != nil {
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return err
}
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if err = json.Unmarshal(stdout, v); err != nil {
return fmt.Errorf("failed to unmarshal JSON for %s %v: %s: %v", program, util.StripSecretInArgs(args), stdout, err)
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}
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return nil
}
// Used in isMountPoint()
var dummyMount = mount.New("")
func isMountPoint(p string) (bool, error) {
notMnt, err := dummyMount.IsLikelyNotMountPoint(p)
if err != nil {
return false, status.Error(codes.Internal, err.Error())
}
return !notMnt, nil
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}
func pathExists(p string) bool {
_, err := os.Stat(p)
return err == nil
}
// Controller service request validation
func (cs *ControllerServer) validateCreateVolumeRequest(req *csi.CreateVolumeRequest) error {
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
return fmt.Errorf("invalid CreateVolumeRequest: %v", err)
}
if req.GetName() == "" {
return status.Error(codes.InvalidArgument, "volume Name cannot be empty")
}
reqCaps := req.GetVolumeCapabilities()
if reqCaps == nil {
return status.Error(codes.InvalidArgument, "volume Capabilities cannot be empty")
}
for _, cap := range reqCaps {
if cap.GetBlock() != nil {
return status.Error(codes.Unimplemented, "block volume not supported")
}
}
return nil
}
func (cs *ControllerServer) validateDeleteVolumeRequest() error {
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
return fmt.Errorf("invalid DeleteVolumeRequest: %v", err)
}
return nil
}
// Node service request validation
func validateNodeStageVolumeRequest(req *csi.NodeStageVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return errors.New("volume capability missing in request")
}
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
if req.GetSecrets() == nil || len(req.GetSecrets()) == 0 {
return errors.New("stage secrets cannot be nil or empty")
}
return nil
}
func validateNodeUnstageVolumeRequest(req *csi.NodeUnstageVolumeRequest) error {
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
return nil
}
func validateNodePublishVolumeRequest(req *csi.NodePublishVolumeRequest) error {
if req.GetVolumeCapability() == nil {
return errors.New("volume capability missing in request")
}
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetTargetPath() == "" {
return errors.New("target path missing in request")
}
if req.GetStagingTargetPath() == "" {
return errors.New("staging target path missing in request")
}
return nil
}
func validateNodeUnpublishVolumeRequest(req *csi.NodeUnpublishVolumeRequest) error {
if req.GetVolumeId() == "" {
return errors.New("volume ID missing in request")
}
if req.GetTargetPath() == "" {
return errors.New("target path missing in request")
}
return nil
}