diff --git a/cmd/config-common.go b/cmd/config-common.go index 666c072c5..18040eccb 100644 --- a/cmd/config-common.go +++ b/cmd/config-common.go @@ -21,7 +21,6 @@ import ( "context" "errors" "fmt" - "time" etcd "github.com/coreos/etcd/clientv3" "github.com/minio/minio/cmd/logger" @@ -53,8 +52,19 @@ func readConfig(ctx context.Context, objAPI ObjectLayer, configFile string) ([]b } func deleteConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) error { - _, err := client.Delete(ctx, configFile) - return err + timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout) + defer cancel() + + _, err := client.Delete(timeoutCtx, configFile) + if err != nil { + if err == context.DeadlineExceeded { + return fmt.Errorf("etcd setup is unreachable, please check your endpoints %s", + client.Endpoints()) + } + return fmt.Errorf("unexpected error %s returned by etcd setup, please check your endpoints %s", + err, client.Endpoints()) + } + return nil } func deleteConfig(ctx context.Context, objAPI ObjectLayer, configFile string) error { @@ -89,9 +99,11 @@ func readConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) resp, err := client.Get(timeoutCtx, configFile) if err != nil { if err == context.DeadlineExceeded { - return nil, fmt.Errorf("etcd setup is unreachable, please check your endpoints %s", client.Endpoints()) + return nil, fmt.Errorf("etcd setup is unreachable, please check your endpoints %s", + client.Endpoints()) } - return nil, fmt.Errorf("unexpected error %s returned by etcd setup, please check your endpoints %s", err, client.Endpoints()) + return nil, fmt.Errorf("unexpected error %s returned by etcd setup, please check your endpoints %s", + err, client.Endpoints()) } if resp.Count == 0 { return nil, errConfigNotFound @@ -104,54 +116,7 @@ func readConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) return nil, errConfigNotFound } -// watchConfigEtcd - watches for changes on `configFile` on etcd and loads them. -func watchConfigEtcd(objAPI ObjectLayer, configFile string, loadCfgFn func(ObjectLayer) error) { - for { - watchCh := globalEtcdClient.Watch(context.Background(), configFile) - select { - case <-GlobalServiceDoneCh: - return - case watchResp, ok := <-watchCh: - if !ok { - time.Sleep(1 * time.Second) - continue - } - if err := watchResp.Err(); err != nil { - logger.LogIf(context.Background(), err) - // log and retry. - time.Sleep(1 * time.Second) - continue - } - for _, event := range watchResp.Events { - if event.IsModify() || event.IsCreate() { - loadCfgFn(objAPI) - } - } - } - } -} - -func checkConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) error { - timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout) - defer cancel() - resp, err := client.Get(timeoutCtx, configFile) - if err != nil { - if err == context.DeadlineExceeded { - return fmt.Errorf("etcd setup is unreachable, please check your endpoints %s", client.Endpoints()) - } - return fmt.Errorf("unexpected error %s returned by etcd setup, please check your endpoints %s", err, client.Endpoints()) - } - if resp.Count == 0 { - return errConfigNotFound - } - return nil -} - func checkConfig(ctx context.Context, objAPI ObjectLayer, configFile string) error { - if globalEtcdClient != nil { - return checkConfigEtcd(ctx, globalEtcdClient, configFile) - } - if _, err := objAPI.GetObjectInfo(ctx, minioMetaBucket, configFile, ObjectOptions{}); err != nil { // Treat object not found as config not found. if isErrObjectNotFound(err) { diff --git a/cmd/config-migrate.go b/cmd/config-migrate.go index 723217a96..6cf2205cc 100644 --- a/cmd/config-migrate.go +++ b/cmd/config-migrate.go @@ -29,7 +29,7 @@ import ( "github.com/minio/minio/pkg/auth" "github.com/minio/minio/pkg/event" "github.com/minio/minio/pkg/event/target" - "github.com/minio/minio/pkg/iam/policy" + iampolicy "github.com/minio/minio/pkg/iam/policy" "github.com/minio/minio/pkg/iam/validator" xnet "github.com/minio/minio/pkg/net" "github.com/minio/minio/pkg/quick" @@ -2413,6 +2413,7 @@ func migrateV27ToV28() error { } // Migrates ${HOME}/.minio/config.json to '/.minio.sys/config/config.json' +// if etcd is configured then migrates /config/config.json to '/.minio.sys/config/config.json' func migrateConfigToMinioSys(objAPI ObjectLayer) (err error) { // Construct path to config.json for the given bucket. configFile := path.Join(minioConfigPrefix, minioConfigFile) @@ -2423,10 +2424,14 @@ func migrateConfigToMinioSys(objAPI ObjectLayer) (err error) { } defer func() { - // Rename config.json to config.json.deprecated only upon - // success of this function. if err == nil { - os.Rename(getConfigFile(), getConfigFile()+".deprecated") + if globalEtcdClient != nil { + deleteConfigEtcd(context.Background(), globalEtcdClient, configFile) + } else { + // Rename config.json to config.json.deprecated only upon + // success of this function. + os.Rename(getConfigFile(), getConfigFile()+".deprecated") + } } }() @@ -2446,20 +2451,24 @@ func migrateConfigToMinioSys(objAPI ObjectLayer) (err error) { return err } // if errConfigNotFound proceed to migrate.. + var configFiles = []string{ + getConfigFile(), + getConfigFile() + ".deprecated", + configFile, + } var config = &serverConfig{} - if _, err = Load(getConfigFile(), config); err != nil { - if !os.IsNotExist(err) { - return err - } - // Read from deprecate file as well if necessary. - if _, err = Load(getConfigFile()+".deprecated", config); err != nil { + for _, cfgFile := range configFiles { + if _, err = Load(cfgFile, config); err != nil { if !os.IsNotExist(err) { return err } - // If all else fails simply initialize the server config. - return newSrvConfig(objAPI) + continue } - + break + } + if os.IsNotExist(err) { + // Initialize the server config, if no config exists. + return newSrvConfig(objAPI) } return saveServerConfig(context.Background(), objAPI, config) } diff --git a/cmd/config.go b/cmd/config.go index 4b53f6ca3..e9948540f 100644 --- a/cmd/config.go +++ b/cmd/config.go @@ -49,10 +49,6 @@ func saveServerConfig(ctx context.Context, objAPI ObjectLayer, config *serverCon } configFile := path.Join(minioConfigPrefix, minioConfigFile) - if globalEtcdClient != nil { - return saveConfigEtcd(ctx, globalEtcdClient, configFile, data) - } - // Create a backup of the current config oldData, err := readConfig(ctx, objAPI, configFile) if err == nil { @@ -71,15 +67,8 @@ func saveServerConfig(ctx context.Context, objAPI ObjectLayer, config *serverCon } func readServerConfig(ctx context.Context, objAPI ObjectLayer) (*serverConfig, error) { - var configData []byte - var err error - configFile := path.Join(minioConfigPrefix, minioConfigFile) - if globalEtcdClient != nil { - configData, err = readConfigEtcd(ctx, globalEtcdClient, configFile) - } else { - configData, err = readConfig(ctx, objAPI, configFile) - } + configData, err := readConfig(ctx, objAPI, configFile) if err != nil { return nil, err } @@ -152,44 +141,24 @@ func initConfig(objAPI ObjectLayer) error { return errServerNotInitialized } - configFile := path.Join(minioConfigPrefix, minioConfigFile) - - if globalEtcdClient != nil { - if err := checkConfigEtcd(context.Background(), globalEtcdClient, getConfigFile()); err != nil { - if err == errConfigNotFound { - // Migrates all configs at old location. - if err = migrateConfig(); err != nil { - return err - } - // Migrates etcd ${HOME}/.minio/config.json to '/config/config.json' - if err = migrateConfigToMinioSys(objAPI); err != nil { - return err - } - } else { - return err - } - } - - // Watch config for changes and reloads them. - go watchConfigEtcd(objAPI, configFile, loadConfig) - - } else { - if isFile(getConfigFile()) { - if err := migrateConfig(); err != nil { - return err - } - } - // Migrates ${HOME}/.minio/config.json or config.json.deprecated - // to '/.minio.sys/config/config.json' - // ignore if the file doesn't exist. - if err := migrateConfigToMinioSys(objAPI); err != nil { + if isFile(getConfigFile()) { + if err := migrateConfig(); err != nil { return err } + } - // Migrates backend '/.minio.sys/config/config.json' to latest version. - if err := migrateMinioSysConfig(objAPI); err != nil { - return err - } + // Migrates ${HOME}/.minio/config.json or config.json.deprecated + // to '/.minio.sys/config/config.json' + // ignore if the file doesn't exist. + // If etcd is set then migrates /config/config.json + // to '/.minio.sys/config/config.json' + if err := migrateConfigToMinioSys(objAPI); err != nil { + return err + } + + // Migrates backend '/.minio.sys/config/config.json' to latest version. + if err := migrateMinioSysConfig(objAPI); err != nil { + return err } return loadConfig(objAPI) diff --git a/docs/federation/lookup/README.md b/docs/federation/lookup/README.md index 27703d5d1..43e74f1b6 100644 --- a/docs/federation/lookup/README.md +++ b/docs/federation/lookup/README.md @@ -9,8 +9,8 @@ Install MinIO - [MinIO Quickstart Guide](https://docs.min.io/docs/minio-quicksta ### 2. Run MinIO in federated mode Bucket lookup from DNS federation requires two dependencies -- etcd (for config, bucket SRV records) -- CoreDNS (for DNS management based on populated bucket SRV records, optional) +- etcd (for bucket DNS service records) +- CoreDNS (for DNS management based on populated bucket DNS service records, optional) ## Architecture