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reload.go
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reload.go
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package 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() {
// we're unlocking here, because
// LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes()
// holds that lock too.
daemon.configStore.Unlock()
if err == nil {
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)
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
}
if err := daemon.reloadNetworkDiagnosticPort(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)
}
// 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.
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
}
// 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 diagnose mode if the config is valid
func (daemon *Daemon) reloadNetworkDiagnosticPort(conf *config.Config, attributes map[string]string) error {
if conf == nil || daemon.netController == nil {
return nil
}
// Enable the network diagnose if the flag is set with a valid port withing the range
if conf.IsValueSet("network-diagnostic-port") && conf.NetworkDiagnosticPort > 0 && conf.NetworkDiagnosticPort < 65536 {
logrus.Warnf("Calling the diagnostic start with %d", conf.NetworkDiagnosticPort)
daemon.netController.StartDiagnose(conf.NetworkDiagnosticPort)
} else {
daemon.netController.StopDiagnose()
}
return nil
}