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cephfs/cephuser: fixed getCephUser

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output from `ceph auth -f json get` contains non-JSON data in the beginning
workaround for this is searching for the start of valid JSON data (starts with "[{")
and start reading from there
This commit is contained in:
gman 2018-08-28 10:13:53 +02:00
parent d09ce2d003
commit 12958d0a9a
1 changed files with 31 additions and 8 deletions
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39
pkg/cephfs/cephuser.go
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@ -17,6 +17,8 @@ limitations under the License.
package cephfs
import (
"bytes"
"encoding/json"
"fmt"
"os"
)
@ -38,26 +40,47 @@ type cephEntity struct {
Caps cephEntityCaps `json:"caps"`
}
func (ent *cephEntity) toCredentials() *credentials {
return &credentials{
id: ent.Entity[len(cephEntityClientPrefix):],
key: ent.Key,
}
}
func getCephUserName(volId volumeID) string {
return cephUserPrefix + string(volId)
}
func getCephUser(userId string) (*cephEntity, error) {
entityName := cephEntityClientPrefix + userId
var ents []cephEntity
func getCephUser(adminCr *credentials, volId volumeID) (*cephEntity, error) {
entityName := cephEntityClientPrefix + getCephUserName(volId)
if err := execCommandJson(&ents, "ceph", "auth", "get", entityName); err != nil {
return nil, err
var ents []cephEntity
args := [...]string{
"auth", "-f", "json", "-c", getCephConfPath(volId), "-n", cephEntityClientPrefix + adminCr.id,
"get", entityName,
}
out, err := execCommand("ceph", args[:]...)
if err != nil {
return nil, fmt.Errorf("cephfs: ceph failed with following error: %s\ncephfs: ceph output: %s", err, out)
}
// Workaround for output from `ceph auth get`
// Contains non-json data: "exported keyring for ENTITY\n\n"
offset := bytes.Index(out, []byte("[{"))
if json.NewDecoder(bytes.NewReader(out[offset:])).Decode(&ents); err != nil {
return nil, fmt.Errorf("failed to decode json: %v", err)
}
if len(ents) != 1 {
return nil, fmt.Errorf("error retrieving entity %s", entityName)
return nil, fmt.Errorf("got unexpected number of entities for %s: expected 1, got %d", entityName, len(ents))
}
return &ents[0], nil
}
func createCephUser(volOptions *volumeOptions, cr *credentials, volId volumeID) (*cephEntity, error) {
func createCephUser(volOptions *volumeOptions, adminCr *credentials, volId volumeID) (*cephEntity, error) {
caps := cephEntityCaps{
Mds: fmt.Sprintf("allow rw path=%s", getVolumeRootPath_ceph(volId)),
Mon: "allow r",
@ -66,7 +89,7 @@ func createCephUser(volOptions *volumeOptions, cr *credentials, volId volumeID)
var ents []cephEntity
args := [...]string{
"auth", "-f", "json", "-c", getCephConfPath(volId), "-n", cephEntityClientPrefix + cr.id,
"auth", "-f", "json", "-c", getCephConfPath(volId), "-n", cephEntityClientPrefix + adminCr.id,
"get-or-create", cephEntityClientPrefix + getCephUserName(volId),
"mds", caps.Mds,
"mon", caps.Mon,