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- package daemon
- import (
- "encoding/json"
- "fmt"
- "github.com/Sirupsen/logrus"
- "github.com/docker/docker/daemon/config"
- "github.com/docker/docker/daemon/discovery"
- "github.com/docker/docker/libcontainerd"
- )
- // 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() {
- // we're unlocking here, because
- // LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes()
- // holds that lock too.
- daemon.configStore.Unlock()
- if err == nil {
- daemon.LogDaemonEventWithAttributes("reload", attributes)
- }
- }()
- daemon.reloadPlatform(conf, attributes)
- daemon.reloadDebug(conf, attributes)
- daemon.reloadMaxConcurrentDowloadsAndUploads(conf, attributes)
- daemon.reloadShutdownTimeout(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 nil
- }
- // 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)
- }
- // reloadMaxConcurrentDowloadsAndUploads updates configuration with max concurrent
- // download and upload options and updates the passed attributes
- func (daemon *Daemon) reloadMaxConcurrentDowloadsAndUploads(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.
- if conf.IsValueSet("max-concurrent-downloads") && conf.MaxConcurrentDownloads != nil {
- *daemon.configStore.MaxConcurrentDownloads = *conf.MaxConcurrentDownloads
- } else {
- maxConcurrentDownloads := config.DefaultMaxConcurrentDownloads
- daemon.configStore.MaxConcurrentDownloads = &maxConcurrentDownloads
- }
- logrus.Debugf("Reset Max Concurrent Downloads: %d", *daemon.configStore.MaxConcurrentDownloads)
- if daemon.downloadManager != nil {
- daemon.downloadManager.SetConcurrency(*daemon.configStore.MaxConcurrentDownloads)
- }
- // prepare reload event attributes with updatable configurations
- attributes["max-concurrent-downloads"] = fmt.Sprintf("%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.
- if conf.IsValueSet("max-concurrent-uploads") && conf.MaxConcurrentUploads != nil {
- *daemon.configStore.MaxConcurrentUploads = *conf.MaxConcurrentUploads
- } else {
- maxConcurrentUploads := config.DefaultMaxConcurrentUploads
- daemon.configStore.MaxConcurrentUploads = &maxConcurrentUploads
- }
- logrus.Debugf("Reset Max Concurrent Uploads: %d", *daemon.configStore.MaxConcurrentUploads)
- if daemon.uploadManager != nil {
- daemon.uploadManager.SetConcurrency(*daemon.configStore.MaxConcurrentUploads)
- }
- // 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).Warnf("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 retore 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
- if err := daemon.containerdRemote.UpdateOptions(libcontainerd.WithLiveRestore(conf.LiveRestoreEnabled)); err != nil {
- return err
- }
- }
- // prepare reload event attributes with updatable configurations
- attributes["live-restore"] = fmt.Sprintf("%t", daemon.configStore.LiveRestoreEnabled)
- return nil
- }
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