added cephfs/cephuser

pkg/cephfs/cephuser.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 (
+	"fmt"
+	"os"
+)
+
+const (
+	cephUserPrefix         = "csi-user-"
+	cephEntityClientPrefix = "client."
+)
+
+type cephEntityCaps struct {
+	Mds string `json:"mds"`
+	Mon string `json:"mon"`
+	Osd string `json:"osd"`
+}
+
+type cephEntity struct {
+	Entity string         `json:"entity"`
+	Key    string         `json:"key"`
+	Caps   cephEntityCaps `json:"caps"`
+}
+
+func getCephUserName(volUuid string) string {
+	return cephUserPrefix + volUuid
+}
+
+func getCephUser(userId string) (*cephEntity, error) {
+	entityName := cephEntityClientPrefix + userId
+	var ents []cephEntity
+
+	if err := execCommandJson(&ents, "ceph", "auth", "get", entityName); err != nil {
+		return nil, err
+	}
+
+	if len(ents) != 1 {
+		return nil, fmt.Errorf("error retrieving entity %s", entityName)
+	}
+
+	return &ents[0], nil
+}
+
+func (e *cephEntity) create() error {
+	return execCommandJson(e, "ceph", "auth", "get-or-create", e.Entity, "mds", e.Caps.Mds, "osd", e.Caps.Osd, "mon", e.Caps.Mon)
+
+}
+
+func createCephUser(volOptions *volumeOptions, volUuid string, readOnly bool) (*cephEntity, error) {
+	access := "rw"
+	if readOnly {
+		access = "r"
+	}
+
+	caps := cephEntityCaps{
+		Mds: fmt.Sprintf("allow %s path=%s", access, getVolumeRootPath_ceph(volUuid)),
+		Mon: "allow r",
+		Osd: fmt.Sprintf("allow %s pool=%s namespace=%s", access, volOptions.Pool, getVolumeNamespace(volUuid)),
+	}
+
+	var ents []cephEntity
+	args := [...]string{
+		"auth", "-f", "json",
+		"get-or-create", cephEntityClientPrefix + getCephUserName(volUuid),
+		"mds", caps.Mds,
+		"mon", caps.Mon,
+		"osd", caps.Osd,
+	}
+
+	if err := execCommandJson(&ents, "ceph", args[:]...); err != nil {
+		return nil, fmt.Errorf("error creating ceph user: %v", err)
+	}
+
+	return &ents[0], nil
+}
+
+func deleteCephUser(volUuid string) error {
+	userId := getCephUserName(volUuid)
+
+	if err := execCommandAndValidate("ceph", "auth", "rm", cephEntityClientPrefix+userId); err != nil {
+		return err
+	}
+
+	os.Remove(getCephKeyringPath(userId))
+	os.Remove(getCephSecretPath(userId))
+
+	return nil
+}