| package daemon // import "github.com/docker/docker/daemon" |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| |
| "github.com/docker/docker/daemon/config" |
| "github.com/docker/docker/daemon/discovery" |
| "github.com/sirupsen/logrus" |
| ) |
| |
| // Reload reads configuration changes and modifies the |
| // daemon according to those changes. |
| // These are the settings that Reload changes: |
| // - Platform runtime |
| // - Daemon debug log level |
| // - Daemon max concurrent downloads |
| // - Daemon max concurrent uploads |
| // - Daemon shutdown timeout (in seconds) |
| // - Cluster discovery (reconfigure and restart) |
| // - Daemon labels |
| // - Insecure registries |
| // - Registry mirrors |
| // - Daemon live restore |
| func (daemon *Daemon) Reload(conf *config.Config) (err error) { |
| daemon.configStore.Lock() |
| attributes := map[string]string{} |
| |
| defer func() { |
| jsonString, _ := json.Marshal(daemon.configStore) |
| |
| // we're unlocking here, because |
| // LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes() |
| // holds that lock too. |
| daemon.configStore.Unlock() |
| if err == nil { |
| logrus.Infof("Reloaded configuration: %s", jsonString) |
| daemon.LogDaemonEventWithAttributes("reload", attributes) |
| } |
| }() |
| |
| if err := daemon.reloadPlatform(conf, attributes); err != nil { |
| return err |
| } |
| daemon.reloadDebug(conf, attributes) |
| daemon.reloadMaxConcurrentDownloadsAndUploads(conf, attributes) |
| daemon.reloadShutdownTimeout(conf, attributes) |
| daemon.reloadFeatures(conf, attributes) |
| |
| if err := daemon.reloadClusterDiscovery(conf, attributes); err != nil { |
| return err |
| } |
| if err := daemon.reloadLabels(conf, attributes); err != nil { |
| return err |
| } |
| if err := daemon.reloadAllowNondistributableArtifacts(conf, attributes); err != nil { |
| return err |
| } |
| if err := daemon.reloadInsecureRegistries(conf, attributes); err != nil { |
| return err |
| } |
| if err := daemon.reloadRegistryMirrors(conf, attributes); err != nil { |
| return err |
| } |
| if err := daemon.reloadLiveRestore(conf, attributes); err != nil { |
| return err |
| } |
| return daemon.reloadNetworkDiagnosticPort(conf, attributes) |
| } |
| |
| // reloadDebug updates configuration with Debug option |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadDebug(conf *config.Config, attributes map[string]string) { |
| // update corresponding configuration |
| if conf.IsValueSet("debug") { |
| daemon.configStore.Debug = conf.Debug |
| } |
| // prepare reload event attributes with updatable configurations |
| attributes["debug"] = fmt.Sprintf("%t", daemon.configStore.Debug) |
| } |
| |
| // reloadMaxConcurrentDownloadsAndUploads updates configuration with max concurrent |
| // download and upload options and updates the passed attributes |
| func (daemon *Daemon) reloadMaxConcurrentDownloadsAndUploads(conf *config.Config, attributes map[string]string) { |
| // If no value is set for max-concurrent-downloads we assume it is the default value |
| // We always "reset" as the cost is lightweight and easy to maintain. |
| maxConcurrentDownloads := config.DefaultMaxConcurrentDownloads |
| if conf.IsValueSet("max-concurrent-downloads") && conf.MaxConcurrentDownloads != nil { |
| maxConcurrentDownloads = *conf.MaxConcurrentDownloads |
| } |
| daemon.configStore.MaxConcurrentDownloads = &maxConcurrentDownloads |
| logrus.Debugf("Reset Max Concurrent Downloads: %d", *daemon.configStore.MaxConcurrentDownloads) |
| |
| // If no value is set for max-concurrent-upload we assume it is the default value |
| // We always "reset" as the cost is lightweight and easy to maintain. |
| maxConcurrentUploads := config.DefaultMaxConcurrentUploads |
| if conf.IsValueSet("max-concurrent-uploads") && conf.MaxConcurrentUploads != nil { |
| maxConcurrentUploads = *conf.MaxConcurrentUploads |
| } |
| daemon.configStore.MaxConcurrentUploads = &maxConcurrentUploads |
| logrus.Debugf("Reset Max Concurrent Uploads: %d", *daemon.configStore.MaxConcurrentUploads) |
| |
| if daemon.imageService != nil { |
| daemon.imageService.UpdateConfig(&maxConcurrentDownloads, &maxConcurrentUploads) |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| attributes["max-concurrent-downloads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentDownloads) |
| // prepare reload event attributes with updatable configurations |
| attributes["max-concurrent-uploads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentUploads) |
| } |
| |
| // reloadShutdownTimeout updates configuration with daemon shutdown timeout option |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadShutdownTimeout(conf *config.Config, attributes map[string]string) { |
| // update corresponding configuration |
| if conf.IsValueSet("shutdown-timeout") { |
| daemon.configStore.ShutdownTimeout = conf.ShutdownTimeout |
| logrus.Debugf("Reset Shutdown Timeout: %d", daemon.configStore.ShutdownTimeout) |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| attributes["shutdown-timeout"] = fmt.Sprintf("%d", daemon.configStore.ShutdownTimeout) |
| } |
| |
| // reloadClusterDiscovery updates configuration with cluster discovery options |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadClusterDiscovery(conf *config.Config, attributes map[string]string) (err error) { |
| defer func() { |
| // prepare reload event attributes with updatable configurations |
| attributes["cluster-store"] = conf.ClusterStore |
| attributes["cluster-advertise"] = conf.ClusterAdvertise |
| |
| attributes["cluster-store-opts"] = "{}" |
| if daemon.configStore.ClusterOpts != nil { |
| opts, err2 := json.Marshal(conf.ClusterOpts) |
| if err != nil { |
| err = err2 |
| } |
| attributes["cluster-store-opts"] = string(opts) |
| } |
| }() |
| |
| newAdvertise := conf.ClusterAdvertise |
| newClusterStore := daemon.configStore.ClusterStore |
| if conf.IsValueSet("cluster-advertise") { |
| if conf.IsValueSet("cluster-store") { |
| newClusterStore = conf.ClusterStore |
| } |
| newAdvertise, err = config.ParseClusterAdvertiseSettings(newClusterStore, conf.ClusterAdvertise) |
| if err != nil && err != discovery.ErrDiscoveryDisabled { |
| return err |
| } |
| } |
| |
| if daemon.clusterProvider != nil { |
| if err := conf.IsSwarmCompatible(); err != nil { |
| return err |
| } |
| } |
| |
| // check discovery modifications |
| if !config.ModifiedDiscoverySettings(daemon.configStore, newClusterStore, newAdvertise, conf.ClusterOpts) { |
| return nil |
| } |
| |
| // enable discovery for the first time if it was not previously enabled |
| if daemon.discoveryWatcher == nil { |
| discoveryWatcher, err := discovery.Init(newClusterStore, newAdvertise, conf.ClusterOpts) |
| if err != nil { |
| return fmt.Errorf("failed to initialize discovery: %v", err) |
| } |
| daemon.discoveryWatcher = discoveryWatcher |
| } else if err == discovery.ErrDiscoveryDisabled { |
| // disable discovery if it was previously enabled and it's disabled now |
| daemon.discoveryWatcher.Stop() |
| } else if err = daemon.discoveryWatcher.Reload(conf.ClusterStore, newAdvertise, conf.ClusterOpts); err != nil { |
| // reload discovery |
| return err |
| } |
| |
| daemon.configStore.ClusterStore = newClusterStore |
| daemon.configStore.ClusterOpts = conf.ClusterOpts |
| daemon.configStore.ClusterAdvertise = newAdvertise |
| |
| if daemon.netController == nil { |
| return nil |
| } |
| netOptions, err := daemon.networkOptions(daemon.configStore, daemon.PluginStore, nil) |
| if err != nil { |
| logrus.WithError(err).Warn("failed to get options with network controller") |
| return nil |
| } |
| err = daemon.netController.ReloadConfiguration(netOptions...) |
| if err != nil { |
| logrus.Warnf("Failed to reload configuration with network controller: %v", err) |
| } |
| return nil |
| } |
| |
| // reloadLabels updates configuration with engine labels |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadLabels(conf *config.Config, attributes map[string]string) error { |
| // update corresponding configuration |
| if conf.IsValueSet("labels") { |
| daemon.configStore.Labels = conf.Labels |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| if daemon.configStore.Labels != nil { |
| labels, err := json.Marshal(daemon.configStore.Labels) |
| if err != nil { |
| return err |
| } |
| attributes["labels"] = string(labels) |
| } else { |
| attributes["labels"] = "[]" |
| } |
| |
| return nil |
| } |
| |
| // reloadAllowNondistributableArtifacts updates the configuration with allow-nondistributable-artifacts options |
| // and updates the passed attributes. |
| func (daemon *Daemon) reloadAllowNondistributableArtifacts(conf *config.Config, attributes map[string]string) error { |
| // Update corresponding configuration. |
| if conf.IsValueSet("allow-nondistributable-artifacts") { |
| daemon.configStore.AllowNondistributableArtifacts = conf.AllowNondistributableArtifacts |
| if err := daemon.RegistryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil { |
| return err |
| } |
| } |
| |
| // Prepare reload event attributes with updatable configurations. |
| if daemon.configStore.AllowNondistributableArtifacts != nil { |
| v, err := json.Marshal(daemon.configStore.AllowNondistributableArtifacts) |
| if err != nil { |
| return err |
| } |
| attributes["allow-nondistributable-artifacts"] = string(v) |
| } else { |
| attributes["allow-nondistributable-artifacts"] = "[]" |
| } |
| |
| return nil |
| } |
| |
| // reloadInsecureRegistries updates configuration with insecure registry option |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadInsecureRegistries(conf *config.Config, attributes map[string]string) error { |
| // update corresponding configuration |
| if conf.IsValueSet("insecure-registries") { |
| daemon.configStore.InsecureRegistries = conf.InsecureRegistries |
| if err := daemon.RegistryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil { |
| return err |
| } |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| if daemon.configStore.InsecureRegistries != nil { |
| insecureRegistries, err := json.Marshal(daemon.configStore.InsecureRegistries) |
| if err != nil { |
| return err |
| } |
| attributes["insecure-registries"] = string(insecureRegistries) |
| } else { |
| attributes["insecure-registries"] = "[]" |
| } |
| |
| return nil |
| } |
| |
| // reloadRegistryMirrors updates configuration with registry mirror options |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadRegistryMirrors(conf *config.Config, attributes map[string]string) error { |
| // update corresponding configuration |
| if conf.IsValueSet("registry-mirrors") { |
| daemon.configStore.Mirrors = conf.Mirrors |
| if err := daemon.RegistryService.LoadMirrors(conf.Mirrors); err != nil { |
| return err |
| } |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| if daemon.configStore.Mirrors != nil { |
| mirrors, err := json.Marshal(daemon.configStore.Mirrors) |
| if err != nil { |
| return err |
| } |
| attributes["registry-mirrors"] = string(mirrors) |
| } else { |
| attributes["registry-mirrors"] = "[]" |
| } |
| |
| return nil |
| } |
| |
| // reloadLiveRestore updates configuration with live restore option |
| // and updates the passed attributes |
| func (daemon *Daemon) reloadLiveRestore(conf *config.Config, attributes map[string]string) error { |
| // update corresponding configuration |
| if conf.IsValueSet("live-restore") { |
| daemon.configStore.LiveRestoreEnabled = conf.LiveRestoreEnabled |
| } |
| |
| // prepare reload event attributes with updatable configurations |
| attributes["live-restore"] = fmt.Sprintf("%t", daemon.configStore.LiveRestoreEnabled) |
| return nil |
| } |
| |
| // reloadNetworkDiagnosticPort updates the network controller starting the diagnostic if the config is valid |
| func (daemon *Daemon) reloadNetworkDiagnosticPort(conf *config.Config, attributes map[string]string) error { |
| if conf == nil || daemon.netController == nil || !conf.IsValueSet("network-diagnostic-port") || |
| conf.NetworkDiagnosticPort < 1 || conf.NetworkDiagnosticPort > 65535 { |
| // If there is no config make sure that the diagnostic is off |
| if daemon.netController != nil { |
| daemon.netController.StopDiagnostic() |
| } |
| return nil |
| } |
| // Enable the network diagnostic if the flag is set with a valid port within the range |
| logrus.WithFields(logrus.Fields{"port": conf.NetworkDiagnosticPort, "ip": "127.0.0.1"}).Warn("Starting network diagnostic server") |
| daemon.netController.StartDiagnostic(conf.NetworkDiagnosticPort) |
| |
| return nil |
| } |
| |
| // reloadFeatures updates configuration with enabled/disabled features |
| func (daemon *Daemon) reloadFeatures(conf *config.Config, attributes map[string]string) { |
| // update corresponding configuration |
| // note that we allow features option to be entirely unset |
| daemon.configStore.Features = conf.Features |
| |
| // prepare reload event attributes with updatable configurations |
| attributes["features"] = fmt.Sprintf("%v", daemon.configStore.Features) |
| } |
