1package daemon // import "github.com/docker/docker/daemon" 2 3import ( 4 "encoding/json" 5 "fmt" 6 7 "github.com/docker/docker/daemon/config" 8 "github.com/docker/docker/daemon/discovery" 9 "github.com/sirupsen/logrus" 10) 11 12// Reload reads configuration changes and modifies the 13// daemon according to those changes. 14// These are the settings that Reload changes: 15// - Platform runtime 16// - Daemon debug log level 17// - Daemon max concurrent downloads 18// - Daemon max concurrent uploads 19// - Daemon max download attempts 20// - Daemon shutdown timeout (in seconds) 21// - Cluster discovery (reconfigure and restart) 22// - Daemon labels 23// - Insecure registries 24// - Registry mirrors 25// - Daemon live restore 26func (daemon *Daemon) Reload(conf *config.Config) (err error) { 27 daemon.configStore.Lock() 28 attributes := map[string]string{} 29 30 defer func() { 31 jsonString, _ := json.Marshal(daemon.configStore) 32 33 // we're unlocking here, because 34 // LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes() 35 // holds that lock too. 36 daemon.configStore.Unlock() 37 if err == nil { 38 logrus.Infof("Reloaded configuration: %s", jsonString) 39 daemon.LogDaemonEventWithAttributes("reload", attributes) 40 } 41 }() 42 43 if err := daemon.reloadPlatform(conf, attributes); err != nil { 44 return err 45 } 46 daemon.reloadDebug(conf, attributes) 47 daemon.reloadMaxConcurrentDownloadsAndUploads(conf, attributes) 48 if err := daemon.reloadMaxDownloadAttempts(conf, attributes); err != nil { 49 return err 50 } 51 daemon.reloadShutdownTimeout(conf, attributes) 52 daemon.reloadFeatures(conf, attributes) 53 54 if err := daemon.reloadClusterDiscovery(conf, attributes); err != nil { 55 return err 56 } 57 if err := daemon.reloadLabels(conf, attributes); err != nil { 58 return err 59 } 60 if err := daemon.reloadAllowNondistributableArtifacts(conf, attributes); err != nil { 61 return err 62 } 63 if err := daemon.reloadInsecureRegistries(conf, attributes); err != nil { 64 return err 65 } 66 if err := daemon.reloadRegistryMirrors(conf, attributes); err != nil { 67 return err 68 } 69 if err := daemon.reloadLiveRestore(conf, attributes); err != nil { 70 return err 71 } 72 return daemon.reloadNetworkDiagnosticPort(conf, attributes) 73} 74 75// reloadDebug updates configuration with Debug option 76// and updates the passed attributes 77func (daemon *Daemon) reloadDebug(conf *config.Config, attributes map[string]string) { 78 // update corresponding configuration 79 if conf.IsValueSet("debug") { 80 daemon.configStore.Debug = conf.Debug 81 } 82 // prepare reload event attributes with updatable configurations 83 attributes["debug"] = fmt.Sprintf("%t", daemon.configStore.Debug) 84} 85 86// reloadMaxConcurrentDownloadsAndUploads updates configuration with max concurrent 87// download and upload options and updates the passed attributes 88func (daemon *Daemon) reloadMaxConcurrentDownloadsAndUploads(conf *config.Config, attributes map[string]string) { 89 // If no value is set for max-concurrent-downloads we assume it is the default value 90 // We always "reset" as the cost is lightweight and easy to maintain. 91 maxConcurrentDownloads := config.DefaultMaxConcurrentDownloads 92 if conf.IsValueSet("max-concurrent-downloads") && conf.MaxConcurrentDownloads != nil { 93 maxConcurrentDownloads = *conf.MaxConcurrentDownloads 94 } 95 daemon.configStore.MaxConcurrentDownloads = &maxConcurrentDownloads 96 logrus.Debugf("Reset Max Concurrent Downloads: %d", *daemon.configStore.MaxConcurrentDownloads) 97 98 // If no value is set for max-concurrent-upload we assume it is the default value 99 // We always "reset" as the cost is lightweight and easy to maintain. 100 maxConcurrentUploads := config.DefaultMaxConcurrentUploads 101 if conf.IsValueSet("max-concurrent-uploads") && conf.MaxConcurrentUploads != nil { 102 maxConcurrentUploads = *conf.MaxConcurrentUploads 103 } 104 daemon.configStore.MaxConcurrentUploads = &maxConcurrentUploads 105 logrus.Debugf("Reset Max Concurrent Uploads: %d", *daemon.configStore.MaxConcurrentUploads) 106 107 if daemon.imageService != nil { 108 daemon.imageService.UpdateConfig(&maxConcurrentDownloads, &maxConcurrentUploads) 109 } 110 111 // prepare reload event attributes with updatable configurations 112 attributes["max-concurrent-downloads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentDownloads) 113 // prepare reload event attributes with updatable configurations 114 attributes["max-concurrent-uploads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentUploads) 115} 116 117// reloadMaxDownloadAttempts updates configuration with max concurrent 118// download attempts when a connection is lost and updates the passed attributes 119func (daemon *Daemon) reloadMaxDownloadAttempts(conf *config.Config, attributes map[string]string) error { 120 if err := config.ValidateMaxDownloadAttempts(conf); err != nil { 121 return err 122 } 123 124 // If no value is set for max-download-attempts we assume it is the default value 125 // We always "reset" as the cost is lightweight and easy to maintain. 126 maxDownloadAttempts := config.DefaultDownloadAttempts 127 if conf.IsValueSet("max-download-attempts") && conf.MaxDownloadAttempts != nil { 128 maxDownloadAttempts = *conf.MaxDownloadAttempts 129 } 130 daemon.configStore.MaxDownloadAttempts = &maxDownloadAttempts 131 logrus.Debugf("Reset Max Download Attempts: %d", *daemon.configStore.MaxDownloadAttempts) 132 133 // prepare reload event attributes with updatable configurations 134 attributes["max-download-attempts"] = fmt.Sprintf("%d", *daemon.configStore.MaxDownloadAttempts) 135 return nil 136} 137 138// reloadShutdownTimeout updates configuration with daemon shutdown timeout option 139// and updates the passed attributes 140func (daemon *Daemon) reloadShutdownTimeout(conf *config.Config, attributes map[string]string) { 141 // update corresponding configuration 142 if conf.IsValueSet("shutdown-timeout") { 143 daemon.configStore.ShutdownTimeout = conf.ShutdownTimeout 144 logrus.Debugf("Reset Shutdown Timeout: %d", daemon.configStore.ShutdownTimeout) 145 } 146 147 // prepare reload event attributes with updatable configurations 148 attributes["shutdown-timeout"] = fmt.Sprintf("%d", daemon.configStore.ShutdownTimeout) 149} 150 151// reloadClusterDiscovery updates configuration with cluster discovery options 152// and updates the passed attributes 153func (daemon *Daemon) reloadClusterDiscovery(conf *config.Config, attributes map[string]string) (err error) { 154 defer func() { 155 // prepare reload event attributes with updatable configurations 156 attributes["cluster-store"] = conf.ClusterStore 157 attributes["cluster-advertise"] = conf.ClusterAdvertise 158 159 attributes["cluster-store-opts"] = "{}" 160 if daemon.configStore.ClusterOpts != nil { 161 opts, err2 := json.Marshal(conf.ClusterOpts) 162 if err != nil { 163 err = err2 164 } 165 attributes["cluster-store-opts"] = string(opts) 166 } 167 }() 168 169 newAdvertise := conf.ClusterAdvertise 170 newClusterStore := daemon.configStore.ClusterStore 171 if conf.IsValueSet("cluster-advertise") { 172 if conf.IsValueSet("cluster-store") { 173 newClusterStore = conf.ClusterStore 174 } 175 newAdvertise, err = config.ParseClusterAdvertiseSettings(newClusterStore, conf.ClusterAdvertise) 176 if err != nil && err != discovery.ErrDiscoveryDisabled { 177 return err 178 } 179 } 180 181 if daemon.clusterProvider != nil { 182 if err := conf.IsSwarmCompatible(); err != nil { 183 return err 184 } 185 } 186 187 // check discovery modifications 188 if !config.ModifiedDiscoverySettings(daemon.configStore, newClusterStore, newAdvertise, conf.ClusterOpts) { 189 return nil 190 } 191 192 // enable discovery for the first time if it was not previously enabled 193 if daemon.discoveryWatcher == nil { 194 discoveryWatcher, err := discovery.Init(newClusterStore, newAdvertise, conf.ClusterOpts) 195 if err != nil { 196 return fmt.Errorf("failed to initialize discovery: %v", err) 197 } 198 daemon.discoveryWatcher = discoveryWatcher 199 } else if err == discovery.ErrDiscoveryDisabled { 200 // disable discovery if it was previously enabled and it's disabled now 201 daemon.discoveryWatcher.Stop() 202 } else if err = daemon.discoveryWatcher.Reload(conf.ClusterStore, newAdvertise, conf.ClusterOpts); err != nil { 203 // reload discovery 204 return err 205 } 206 207 daemon.configStore.ClusterStore = newClusterStore 208 daemon.configStore.ClusterOpts = conf.ClusterOpts 209 daemon.configStore.ClusterAdvertise = newAdvertise 210 211 if daemon.netController == nil { 212 return nil 213 } 214 netOptions, err := daemon.networkOptions(daemon.configStore, daemon.PluginStore, nil) 215 if err != nil { 216 logrus.WithError(err).Warn("failed to get options with network controller") 217 return nil 218 } 219 err = daemon.netController.ReloadConfiguration(netOptions...) 220 if err != nil { 221 logrus.Warnf("Failed to reload configuration with network controller: %v", err) 222 } 223 return nil 224} 225 226// reloadLabels updates configuration with engine labels 227// and updates the passed attributes 228func (daemon *Daemon) reloadLabels(conf *config.Config, attributes map[string]string) error { 229 // update corresponding configuration 230 if conf.IsValueSet("labels") { 231 daemon.configStore.Labels = conf.Labels 232 } 233 234 // prepare reload event attributes with updatable configurations 235 if daemon.configStore.Labels != nil { 236 labels, err := json.Marshal(daemon.configStore.Labels) 237 if err != nil { 238 return err 239 } 240 attributes["labels"] = string(labels) 241 } else { 242 attributes["labels"] = "[]" 243 } 244 245 return nil 246} 247 248// reloadAllowNondistributableArtifacts updates the configuration with allow-nondistributable-artifacts options 249// and updates the passed attributes. 250func (daemon *Daemon) reloadAllowNondistributableArtifacts(conf *config.Config, attributes map[string]string) error { 251 // Update corresponding configuration. 252 if conf.IsValueSet("allow-nondistributable-artifacts") { 253 daemon.configStore.AllowNondistributableArtifacts = conf.AllowNondistributableArtifacts 254 if err := daemon.RegistryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil { 255 return err 256 } 257 } 258 259 // Prepare reload event attributes with updatable configurations. 260 if daemon.configStore.AllowNondistributableArtifacts != nil { 261 v, err := json.Marshal(daemon.configStore.AllowNondistributableArtifacts) 262 if err != nil { 263 return err 264 } 265 attributes["allow-nondistributable-artifacts"] = string(v) 266 } else { 267 attributes["allow-nondistributable-artifacts"] = "[]" 268 } 269 270 return nil 271} 272 273// reloadInsecureRegistries updates configuration with insecure registry option 274// and updates the passed attributes 275func (daemon *Daemon) reloadInsecureRegistries(conf *config.Config, attributes map[string]string) error { 276 // update corresponding configuration 277 if conf.IsValueSet("insecure-registries") { 278 daemon.configStore.InsecureRegistries = conf.InsecureRegistries 279 if err := daemon.RegistryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil { 280 return err 281 } 282 } 283 284 // prepare reload event attributes with updatable configurations 285 if daemon.configStore.InsecureRegistries != nil { 286 insecureRegistries, err := json.Marshal(daemon.configStore.InsecureRegistries) 287 if err != nil { 288 return err 289 } 290 attributes["insecure-registries"] = string(insecureRegistries) 291 } else { 292 attributes["insecure-registries"] = "[]" 293 } 294 295 return nil 296} 297 298// reloadRegistryMirrors updates configuration with registry mirror options 299// and updates the passed attributes 300func (daemon *Daemon) reloadRegistryMirrors(conf *config.Config, attributes map[string]string) error { 301 // update corresponding configuration 302 if conf.IsValueSet("registry-mirrors") { 303 daemon.configStore.Mirrors = conf.Mirrors 304 if err := daemon.RegistryService.LoadMirrors(conf.Mirrors); err != nil { 305 return err 306 } 307 } 308 309 // prepare reload event attributes with updatable configurations 310 if daemon.configStore.Mirrors != nil { 311 mirrors, err := json.Marshal(daemon.configStore.Mirrors) 312 if err != nil { 313 return err 314 } 315 attributes["registry-mirrors"] = string(mirrors) 316 } else { 317 attributes["registry-mirrors"] = "[]" 318 } 319 320 return nil 321} 322 323// reloadLiveRestore updates configuration with live restore option 324// and updates the passed attributes 325func (daemon *Daemon) reloadLiveRestore(conf *config.Config, attributes map[string]string) error { 326 // update corresponding configuration 327 if conf.IsValueSet("live-restore") { 328 daemon.configStore.LiveRestoreEnabled = conf.LiveRestoreEnabled 329 } 330 331 // prepare reload event attributes with updatable configurations 332 attributes["live-restore"] = fmt.Sprintf("%t", daemon.configStore.LiveRestoreEnabled) 333 return nil 334} 335 336// reloadNetworkDiagnosticPort updates the network controller starting the diagnostic if the config is valid 337func (daemon *Daemon) reloadNetworkDiagnosticPort(conf *config.Config, attributes map[string]string) error { 338 if conf == nil || daemon.netController == nil || !conf.IsValueSet("network-diagnostic-port") || 339 conf.NetworkDiagnosticPort < 1 || conf.NetworkDiagnosticPort > 65535 { 340 // If there is no config make sure that the diagnostic is off 341 if daemon.netController != nil { 342 daemon.netController.StopDiagnostic() 343 } 344 return nil 345 } 346 // Enable the network diagnostic if the flag is set with a valid port within the range 347 logrus.WithFields(logrus.Fields{"port": conf.NetworkDiagnosticPort, "ip": "127.0.0.1"}).Warn("Starting network diagnostic server") 348 daemon.netController.StartDiagnostic(conf.NetworkDiagnosticPort) 349 350 return nil 351} 352 353// reloadFeatures updates configuration with enabled/disabled features 354func (daemon *Daemon) reloadFeatures(conf *config.Config, attributes map[string]string) { 355 // update corresponding configuration 356 // note that we allow features option to be entirely unset 357 daemon.configStore.Features = conf.Features 358 359 // prepare reload event attributes with updatable configurations 360 attributes["features"] = fmt.Sprintf("%v", daemon.configStore.Features) 361} 362