github.com/ssdev-go/moby@v17.12.1-ce-rc2+incompatible/daemon/reload.go (about) 1 package daemon 2 3 import ( 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 shutdown timeout (in seconds) 20 // - Cluster discovery (reconfigure and restart) 21 // - Daemon labels 22 // - Insecure registries 23 // - Registry mirrors 24 // - Daemon live restore 25 func (daemon *Daemon) Reload(conf *config.Config) (err error) { 26 daemon.configStore.Lock() 27 attributes := map[string]string{} 28 29 defer func() { 30 // we're unlocking here, because 31 // LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes() 32 // holds that lock too. 33 daemon.configStore.Unlock() 34 if err == nil { 35 daemon.LogDaemonEventWithAttributes("reload", attributes) 36 } 37 }() 38 39 if err := daemon.reloadPlatform(conf, attributes); err != nil { 40 return err 41 } 42 daemon.reloadDebug(conf, attributes) 43 daemon.reloadMaxConcurrentDownloadsAndUploads(conf, attributes) 44 daemon.reloadShutdownTimeout(conf, attributes) 45 46 if err := daemon.reloadClusterDiscovery(conf, attributes); err != nil { 47 return err 48 } 49 if err := daemon.reloadLabels(conf, attributes); err != nil { 50 return err 51 } 52 if err := daemon.reloadAllowNondistributableArtifacts(conf, attributes); err != nil { 53 return err 54 } 55 if err := daemon.reloadInsecureRegistries(conf, attributes); err != nil { 56 return err 57 } 58 if err := daemon.reloadRegistryMirrors(conf, attributes); err != nil { 59 return err 60 } 61 if err := daemon.reloadLiveRestore(conf, attributes); err != nil { 62 return err 63 } 64 if err := daemon.reloadNetworkDiagnosticPort(conf, attributes); err != nil { 65 return err 66 } 67 return nil 68 } 69 70 // reloadDebug updates configuration with Debug option 71 // and updates the passed attributes 72 func (daemon *Daemon) reloadDebug(conf *config.Config, attributes map[string]string) { 73 // update corresponding configuration 74 if conf.IsValueSet("debug") { 75 daemon.configStore.Debug = conf.Debug 76 } 77 // prepare reload event attributes with updatable configurations 78 attributes["debug"] = fmt.Sprintf("%t", daemon.configStore.Debug) 79 } 80 81 // reloadMaxConcurrentDownloadsAndUploads updates configuration with max concurrent 82 // download and upload options and updates the passed attributes 83 func (daemon *Daemon) reloadMaxConcurrentDownloadsAndUploads(conf *config.Config, attributes map[string]string) { 84 // If no value is set for max-concurrent-downloads we assume it is the default value 85 // We always "reset" as the cost is lightweight and easy to maintain. 86 if conf.IsValueSet("max-concurrent-downloads") && conf.MaxConcurrentDownloads != nil { 87 *daemon.configStore.MaxConcurrentDownloads = *conf.MaxConcurrentDownloads 88 } else { 89 maxConcurrentDownloads := config.DefaultMaxConcurrentDownloads 90 daemon.configStore.MaxConcurrentDownloads = &maxConcurrentDownloads 91 } 92 logrus.Debugf("Reset Max Concurrent Downloads: %d", *daemon.configStore.MaxConcurrentDownloads) 93 if daemon.downloadManager != nil { 94 daemon.downloadManager.SetConcurrency(*daemon.configStore.MaxConcurrentDownloads) 95 } 96 97 // prepare reload event attributes with updatable configurations 98 attributes["max-concurrent-downloads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentDownloads) 99 100 // If no value is set for max-concurrent-upload we assume it is the default value 101 // We always "reset" as the cost is lightweight and easy to maintain. 102 if conf.IsValueSet("max-concurrent-uploads") && conf.MaxConcurrentUploads != nil { 103 *daemon.configStore.MaxConcurrentUploads = *conf.MaxConcurrentUploads 104 } else { 105 maxConcurrentUploads := config.DefaultMaxConcurrentUploads 106 daemon.configStore.MaxConcurrentUploads = &maxConcurrentUploads 107 } 108 logrus.Debugf("Reset Max Concurrent Uploads: %d", *daemon.configStore.MaxConcurrentUploads) 109 if daemon.uploadManager != nil { 110 daemon.uploadManager.SetConcurrency(*daemon.configStore.MaxConcurrentUploads) 111 } 112 113 // prepare reload event attributes with updatable configurations 114 attributes["max-concurrent-uploads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentUploads) 115 } 116 117 // reloadShutdownTimeout updates configuration with daemon shutdown timeout option 118 // and updates the passed attributes 119 func (daemon *Daemon) reloadShutdownTimeout(conf *config.Config, attributes map[string]string) { 120 // update corresponding configuration 121 if conf.IsValueSet("shutdown-timeout") { 122 daemon.configStore.ShutdownTimeout = conf.ShutdownTimeout 123 logrus.Debugf("Reset Shutdown Timeout: %d", daemon.configStore.ShutdownTimeout) 124 } 125 126 // prepare reload event attributes with updatable configurations 127 attributes["shutdown-timeout"] = fmt.Sprintf("%d", daemon.configStore.ShutdownTimeout) 128 } 129 130 // reloadClusterDiscovery updates configuration with cluster discovery options 131 // and updates the passed attributes 132 func (daemon *Daemon) reloadClusterDiscovery(conf *config.Config, attributes map[string]string) (err error) { 133 defer func() { 134 // prepare reload event attributes with updatable configurations 135 attributes["cluster-store"] = conf.ClusterStore 136 attributes["cluster-advertise"] = conf.ClusterAdvertise 137 138 attributes["cluster-store-opts"] = "{}" 139 if daemon.configStore.ClusterOpts != nil { 140 opts, err2 := json.Marshal(conf.ClusterOpts) 141 if err != nil { 142 err = err2 143 } 144 attributes["cluster-store-opts"] = string(opts) 145 } 146 }() 147 148 newAdvertise := conf.ClusterAdvertise 149 newClusterStore := daemon.configStore.ClusterStore 150 if conf.IsValueSet("cluster-advertise") { 151 if conf.IsValueSet("cluster-store") { 152 newClusterStore = conf.ClusterStore 153 } 154 newAdvertise, err = config.ParseClusterAdvertiseSettings(newClusterStore, conf.ClusterAdvertise) 155 if err != nil && err != discovery.ErrDiscoveryDisabled { 156 return err 157 } 158 } 159 160 if daemon.clusterProvider != nil { 161 if err := conf.IsSwarmCompatible(); err != nil { 162 return err 163 } 164 } 165 166 // check discovery modifications 167 if !config.ModifiedDiscoverySettings(daemon.configStore, newClusterStore, newAdvertise, conf.ClusterOpts) { 168 return nil 169 } 170 171 // enable discovery for the first time if it was not previously enabled 172 if daemon.discoveryWatcher == nil { 173 discoveryWatcher, err := discovery.Init(newClusterStore, newAdvertise, conf.ClusterOpts) 174 if err != nil { 175 return fmt.Errorf("failed to initialize discovery: %v", err) 176 } 177 daemon.discoveryWatcher = discoveryWatcher 178 } else if err == discovery.ErrDiscoveryDisabled { 179 // disable discovery if it was previously enabled and it's disabled now 180 daemon.discoveryWatcher.Stop() 181 } else if err = daemon.discoveryWatcher.Reload(conf.ClusterStore, newAdvertise, conf.ClusterOpts); err != nil { 182 // reload discovery 183 return err 184 } 185 186 daemon.configStore.ClusterStore = newClusterStore 187 daemon.configStore.ClusterOpts = conf.ClusterOpts 188 daemon.configStore.ClusterAdvertise = newAdvertise 189 190 if daemon.netController == nil { 191 return nil 192 } 193 netOptions, err := daemon.networkOptions(daemon.configStore, daemon.PluginStore, nil) 194 if err != nil { 195 logrus.WithError(err).Warnf("failed to get options with network controller") 196 return nil 197 } 198 err = daemon.netController.ReloadConfiguration(netOptions...) 199 if err != nil { 200 logrus.Warnf("Failed to reload configuration with network controller: %v", err) 201 } 202 return nil 203 } 204 205 // reloadLabels updates configuration with engine labels 206 // and updates the passed attributes 207 func (daemon *Daemon) reloadLabels(conf *config.Config, attributes map[string]string) error { 208 // update corresponding configuration 209 if conf.IsValueSet("labels") { 210 daemon.configStore.Labels = conf.Labels 211 } 212 213 // prepare reload event attributes with updatable configurations 214 if daemon.configStore.Labels != nil { 215 labels, err := json.Marshal(daemon.configStore.Labels) 216 if err != nil { 217 return err 218 } 219 attributes["labels"] = string(labels) 220 } else { 221 attributes["labels"] = "[]" 222 } 223 224 return nil 225 } 226 227 // reloadAllowNondistributableArtifacts updates the configuration with allow-nondistributable-artifacts options 228 // and updates the passed attributes. 229 func (daemon *Daemon) reloadAllowNondistributableArtifacts(conf *config.Config, attributes map[string]string) error { 230 // Update corresponding configuration. 231 if conf.IsValueSet("allow-nondistributable-artifacts") { 232 daemon.configStore.AllowNondistributableArtifacts = conf.AllowNondistributableArtifacts 233 if err := daemon.RegistryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil { 234 return err 235 } 236 } 237 238 // Prepare reload event attributes with updatable configurations. 239 if daemon.configStore.AllowNondistributableArtifacts != nil { 240 v, err := json.Marshal(daemon.configStore.AllowNondistributableArtifacts) 241 if err != nil { 242 return err 243 } 244 attributes["allow-nondistributable-artifacts"] = string(v) 245 } else { 246 attributes["allow-nondistributable-artifacts"] = "[]" 247 } 248 249 return nil 250 } 251 252 // reloadInsecureRegistries updates configuration with insecure registry option 253 // and updates the passed attributes 254 func (daemon *Daemon) reloadInsecureRegistries(conf *config.Config, attributes map[string]string) error { 255 // update corresponding configuration 256 if conf.IsValueSet("insecure-registries") { 257 daemon.configStore.InsecureRegistries = conf.InsecureRegistries 258 if err := daemon.RegistryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil { 259 return err 260 } 261 } 262 263 // prepare reload event attributes with updatable configurations 264 if daemon.configStore.InsecureRegistries != nil { 265 insecureRegistries, err := json.Marshal(daemon.configStore.InsecureRegistries) 266 if err != nil { 267 return err 268 } 269 attributes["insecure-registries"] = string(insecureRegistries) 270 } else { 271 attributes["insecure-registries"] = "[]" 272 } 273 274 return nil 275 } 276 277 // reloadRegistryMirrors updates configuration with registry mirror options 278 // and updates the passed attributes 279 func (daemon *Daemon) reloadRegistryMirrors(conf *config.Config, attributes map[string]string) error { 280 // update corresponding configuration 281 if conf.IsValueSet("registry-mirrors") { 282 daemon.configStore.Mirrors = conf.Mirrors 283 if err := daemon.RegistryService.LoadMirrors(conf.Mirrors); err != nil { 284 return err 285 } 286 } 287 288 // prepare reload event attributes with updatable configurations 289 if daemon.configStore.Mirrors != nil { 290 mirrors, err := json.Marshal(daemon.configStore.Mirrors) 291 if err != nil { 292 return err 293 } 294 attributes["registry-mirrors"] = string(mirrors) 295 } else { 296 attributes["registry-mirrors"] = "[]" 297 } 298 299 return nil 300 } 301 302 // reloadLiveRestore updates configuration with live retore option 303 // and updates the passed attributes 304 func (daemon *Daemon) reloadLiveRestore(conf *config.Config, attributes map[string]string) error { 305 // update corresponding configuration 306 if conf.IsValueSet("live-restore") { 307 daemon.configStore.LiveRestoreEnabled = conf.LiveRestoreEnabled 308 } 309 310 // prepare reload event attributes with updatable configurations 311 attributes["live-restore"] = fmt.Sprintf("%t", daemon.configStore.LiveRestoreEnabled) 312 return nil 313 } 314 315 // reloadNetworkDiagnosticPort updates the network controller starting the diagnose mode if the config is valid 316 func (daemon *Daemon) reloadNetworkDiagnosticPort(conf *config.Config, attributes map[string]string) error { 317 if conf == nil || daemon.netController == nil { 318 return nil 319 } 320 // Enable the network diagnose if the flag is set with a valid port withing the range 321 if conf.IsValueSet("network-diagnostic-port") && conf.NetworkDiagnosticPort > 0 && conf.NetworkDiagnosticPort < 65536 { 322 logrus.Warnf("Calling the diagnostic start with %d", conf.NetworkDiagnosticPort) 323 daemon.netController.StartDiagnose(conf.NetworkDiagnosticPort) 324 } else { 325 daemon.netController.StopDiagnose() 326 } 327 return nil 328 }