Blaine Gardner
ce803fbf9d
Progress toward issue #2003. Includes design from design doc PR #1578 Use init containers to create configuration for Ceph mgrs. There is only one init container in this design. The init container calls the Rook binary to create Ceph config files which are then shared with the mds daemon main container. Once this init is run, the main mds daemon is run. Leaving room to use the Ceph-versioned image in the future, call `ceph-mds --foreground ...` to run the Ceph mds. The refactor to using an init container also necessitated refactoring the mdses replicaset implementation to a deployment-per-pod implementation due to a chicken-egg problem. With a single container (in the before times) the Rook binary was able to call the ceph-mds daemon with an id generated from the pod name. Since the pod name is not known before runtime, and the id is one of the few params that must be specified to Ceph daemons on run, it is necessary to know the id beforehand; thus the move to a deployment architecture following the likes of the mon and mgr daemons. Signed-off-by: Blaine Gardner <blaine.gardner@suse.com>
100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
/*
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Copyright 2016 The Rook Authors. All rights reserved.
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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 mgr
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import (
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"fmt"
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"path"
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"github.com/coreos/pkg/capnslog"
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"github.com/rook/rook/pkg/clusterd"
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cephconfig "github.com/rook/rook/pkg/daemon/ceph/config"
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"github.com/rook/rook/pkg/util"
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)
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var (
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logger = capnslog.NewPackageLogger("github.com/rook/rook", "cephmgr")
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keyringTemplate = `
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[mgr.%s]
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key = %s
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caps mon = "allow profile mgr"
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caps mds = "allow *"
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caps osd = "allow *"
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`
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)
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const (
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// InitCommand is the `rook ceph` subcommand which will perform mgr initialization
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InitCommand = "mgr-init"
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cephmgr = "ceph-mgr"
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)
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// Config contains the necessary parameters Rook needs to know to set up a mgr for a Ceph cluster.
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type Config struct {
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ClusterInfo *cephconfig.ClusterInfo
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Name string
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Keyring string
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}
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// Initialize generates configuration files for a Ceph mgr
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func Initialize(context *clusterd.Context, config *Config) error {
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logger.Infof("Creating config for MGR %s with keyring %s", config.Name, config.Keyring)
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config.ClusterInfo.Log(logger)
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if err := generateConfigFiles(context, config); err != nil {
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return fmt.Errorf("failed to generate mgr config files. %+v", err)
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}
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util.WriteFileToLog(logger, cephconfig.DefaultConfigFilePath())
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return nil
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}
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func generateConfigFiles(context *clusterd.Context, config *Config) error {
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keyringPath := getMgrKeyringPath(context.ConfigDir, config.Name)
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confDir := getMgrConfDir(context.ConfigDir, config.Name)
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username := fmt.Sprintf("mgr.%s", config.Name)
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settings := map[string]string{
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"mgr data": confDir,
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}
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logger.Infof("Conf files: dir=%s keyring=%s", confDir, keyringPath)
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_, err := cephconfig.GenerateConfigFile(context, config.ClusterInfo, confDir,
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username, keyringPath, nil, settings)
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if err != nil {
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return fmt.Errorf("failed to create config file. %+v", err)
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}
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keyringEval := func(key string) string {
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return fmt.Sprintf(keyringTemplate, config.Name, key)
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}
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err = cephconfig.WriteKeyring(keyringPath, config.Keyring, keyringEval)
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if err != nil {
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return fmt.Errorf("failed to create mgr keyring. %+v", err)
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}
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return nil
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}
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func getMgrConfDir(dir, name string) string {
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return path.Join(dir, fmt.Sprintf("mgr-%s", name))
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}
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func getMgrKeyringPath(dir, name string) string {
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return path.Join(getMgrConfDir(dir, name), "keyring")
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}
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