mirror of
https://github.com/ceph/ceph-csi.git
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138 lines
3.8 KiB
Go
138 lines
3.8 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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"errors"
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"fmt"
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"k8s.io/klog"
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"path"
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"strings"
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)
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// StoreReader interface enables plugging different stores, that contain the
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// keys and data. (e.g k8s secrets or local files)
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type StoreReader interface {
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DataForKey(clusterID string, key string) (string, error)
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}
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/* ConfigKeys contents and format,
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- csMonitors: MON list, comma separated
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- csAdminID: adminID, used for provisioning
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- csUserID: userID, used for publishing
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- csAdminKey: key, for adminID in csProvisionerUser
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- csUserKey: key, for userID in csPublisherUser
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- csPools: Pool list, comma separated
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*/
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// Constants for various ConfigKeys
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const (
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csMonitors = "monitors"
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csAdminID = "adminid"
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csUserID = "userid"
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csAdminKey = "adminkey"
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csUserKey = "userkey"
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csPools = "pools"
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)
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// ConfigStore provides various gettors for ConfigKeys
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type ConfigStore struct {
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StoreReader
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}
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// dataForKey returns data from the config store for the provided key
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func (dc *ConfigStore) dataForKey(clusterID, key string) (string, error) {
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if dc.StoreReader != nil {
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return dc.StoreReader.DataForKey(clusterID, key)
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}
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return "", errors.New("config store location uninitialized")
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}
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// Mons returns a comma separated MON list from the cluster config represented by clusterID
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func (dc *ConfigStore) Mons(clusterID string) (string, error) {
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return dc.dataForKey(clusterID, csMonitors)
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}
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// Pools returns a list of pool names from the cluster config represented by clusterID
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func (dc *ConfigStore) Pools(clusterID string) ([]string, error) {
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content, err := dc.dataForKey(clusterID, csPools)
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if err != nil {
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return nil, err
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}
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return strings.Split(content, ","), nil
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}
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// AdminID returns the admin ID from the cluster config represented by clusterID
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func (dc *ConfigStore) AdminID(clusterID string) (string, error) {
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return dc.dataForKey(clusterID, csAdminID)
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}
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// UserID returns the user ID from the cluster config represented by clusterID
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func (dc *ConfigStore) UserID(clusterID string) (string, error) {
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return dc.dataForKey(clusterID, csUserID)
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}
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// KeyForUser returns the key for the requested user ID from the cluster config
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// represented by clusterID
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func (dc *ConfigStore) KeyForUser(clusterID, userID string) (data string, err error) {
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var fetchKey string
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user, err := dc.AdminID(clusterID)
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if err != nil {
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return
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}
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if user == userID {
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fetchKey = csAdminKey
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} else {
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user, err = dc.UserID(clusterID)
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if err != nil {
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return
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}
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if user != userID {
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err = fmt.Errorf("requested user (%s) not found in cluster configuration of (%s)", userID, clusterID)
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return
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}
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fetchKey = csUserKey
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}
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return dc.dataForKey(clusterID, fetchKey)
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}
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// NewConfigStore returns a config store based on value of configRoot. If
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// configRoot is not "k8s_objects" then it is assumed to be a path to a
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// directory, under which the configuration files can be found
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func NewConfigStore(configRoot string) (*ConfigStore, error) {
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if configRoot != "k8s_objects" {
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klog.Infof("cache-store: using files in path (%s) as config store", configRoot)
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fc := &FileConfig{}
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fc.BasePath = path.Clean(configRoot)
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dc := &ConfigStore{fc}
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return dc, nil
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}
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klog.Infof("cache-store: using k8s objects as config store")
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kc := &K8sConfig{}
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kc.Client = NewK8sClient()
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kc.Namespace = GetK8sNamespace()
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dc := &ConfigStore{kc}
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return dc, nil
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}
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