github.com/jiasir/docker@v1.3.3-0.20170609024000-252e610103e7/daemon/reload.go (about) 1 package daemon 2 3 import ( 4 "encoding/json" 5 "fmt" 6 7 "github.com/Sirupsen/logrus" 8 "github.com/docker/docker/daemon/config" 9 "github.com/docker/docker/daemon/discovery" 10 "github.com/docker/docker/libcontainerd" 11 ) 12 13 // Reload reads configuration changes and modifies the 14 // daemon according to those changes. 15 // These are the settings that Reload changes: 16 // - Platform runtime 17 // - Daemon debug log level 18 // - Daemon max concurrent downloads 19 // - Daemon max concurrent uploads 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 26 func (daemon *Daemon) Reload(conf *config.Config) (err error) { 27 daemon.configStore.Lock() 28 attributes := map[string]string{} 29 30 defer func() { 31 // we're unlocking here, because 32 // LogDaemonEventWithAttributes() -> SystemInfo() -> GetAllRuntimes() 33 // holds that lock too. 34 daemon.configStore.Unlock() 35 if err == nil { 36 daemon.LogDaemonEventWithAttributes("reload", attributes) 37 } 38 }() 39 40 daemon.reloadPlatform(conf, attributes) 41 daemon.reloadDebug(conf, attributes) 42 daemon.reloadMaxConcurrentDowloadsAndUploads(conf, attributes) 43 daemon.reloadShutdownTimeout(conf, attributes) 44 45 if err := daemon.reloadClusterDiscovery(conf, attributes); err != nil { 46 return err 47 } 48 if err := daemon.reloadLabels(conf, attributes); err != nil { 49 return err 50 } 51 if err := daemon.reloadAllowNondistributableArtifacts(conf, attributes); err != nil { 52 return err 53 } 54 if err := daemon.reloadInsecureRegistries(conf, attributes); err != nil { 55 return err 56 } 57 if err := daemon.reloadRegistryMirrors(conf, attributes); err != nil { 58 return err 59 } 60 if err := daemon.reloadLiveRestore(conf, attributes); err != nil { 61 return err 62 } 63 return nil 64 } 65 66 // reloadDebug updates configuration with Debug option 67 // and updates the passed attributes 68 func (daemon *Daemon) reloadDebug(conf *config.Config, attributes map[string]string) { 69 // update corresponding configuration 70 if conf.IsValueSet("debug") { 71 daemon.configStore.Debug = conf.Debug 72 } 73 // prepare reload event attributes with updatable configurations 74 attributes["debug"] = fmt.Sprintf("%t", daemon.configStore.Debug) 75 } 76 77 // reloadMaxConcurrentDowloadsAndUploads updates configuration with max concurrent 78 // download and upload options and updates the passed attributes 79 func (daemon *Daemon) reloadMaxConcurrentDowloadsAndUploads(conf *config.Config, attributes map[string]string) { 80 // If no value is set for max-concurrent-downloads we assume it is the default value 81 // We always "reset" as the cost is lightweight and easy to maintain. 82 if conf.IsValueSet("max-concurrent-downloads") && conf.MaxConcurrentDownloads != nil { 83 *daemon.configStore.MaxConcurrentDownloads = *conf.MaxConcurrentDownloads 84 } else { 85 maxConcurrentDownloads := config.DefaultMaxConcurrentDownloads 86 daemon.configStore.MaxConcurrentDownloads = &maxConcurrentDownloads 87 } 88 logrus.Debugf("Reset Max Concurrent Downloads: %d", *daemon.configStore.MaxConcurrentDownloads) 89 if daemon.downloadManager != nil { 90 daemon.downloadManager.SetConcurrency(*daemon.configStore.MaxConcurrentDownloads) 91 } 92 93 // prepare reload event attributes with updatable configurations 94 attributes["max-concurrent-downloads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentDownloads) 95 96 // If no value is set for max-concurrent-upload we assume it is the default value 97 // We always "reset" as the cost is lightweight and easy to maintain. 98 if conf.IsValueSet("max-concurrent-uploads") && conf.MaxConcurrentUploads != nil { 99 *daemon.configStore.MaxConcurrentUploads = *conf.MaxConcurrentUploads 100 } else { 101 maxConcurrentUploads := config.DefaultMaxConcurrentUploads 102 daemon.configStore.MaxConcurrentUploads = &maxConcurrentUploads 103 } 104 logrus.Debugf("Reset Max Concurrent Uploads: %d", *daemon.configStore.MaxConcurrentUploads) 105 if daemon.uploadManager != nil { 106 daemon.uploadManager.SetConcurrency(*daemon.configStore.MaxConcurrentUploads) 107 } 108 109 // prepare reload event attributes with updatable configurations 110 attributes["max-concurrent-uploads"] = fmt.Sprintf("%d", *daemon.configStore.MaxConcurrentUploads) 111 } 112 113 // reloadShutdownTimeout updates configuration with daemon shutdown timeout option 114 // and updates the passed attributes 115 func (daemon *Daemon) reloadShutdownTimeout(conf *config.Config, attributes map[string]string) { 116 // update corresponding configuration 117 if conf.IsValueSet("shutdown-timeout") { 118 daemon.configStore.ShutdownTimeout = conf.ShutdownTimeout 119 logrus.Debugf("Reset Shutdown Timeout: %d", daemon.configStore.ShutdownTimeout) 120 } 121 122 // prepare reload event attributes with updatable configurations 123 attributes["shutdown-timeout"] = fmt.Sprintf("%d", daemon.configStore.ShutdownTimeout) 124 } 125 126 // reloadClusterDiscovery updates configuration with cluster discovery options 127 // and updates the passed attributes 128 func (daemon *Daemon) reloadClusterDiscovery(conf *config.Config, attributes map[string]string) (err error) { 129 defer func() { 130 // prepare reload event attributes with updatable configurations 131 attributes["cluster-store"] = conf.ClusterStore 132 attributes["cluster-advertise"] = conf.ClusterAdvertise 133 134 attributes["cluster-store-opts"] = "{}" 135 if daemon.configStore.ClusterOpts != nil { 136 opts, err2 := json.Marshal(conf.ClusterOpts) 137 if err != nil { 138 err = err2 139 } 140 attributes["cluster-store-opts"] = string(opts) 141 } 142 }() 143 144 newAdvertise := conf.ClusterAdvertise 145 newClusterStore := daemon.configStore.ClusterStore 146 if conf.IsValueSet("cluster-advertise") { 147 if conf.IsValueSet("cluster-store") { 148 newClusterStore = conf.ClusterStore 149 } 150 newAdvertise, err = config.ParseClusterAdvertiseSettings(newClusterStore, conf.ClusterAdvertise) 151 if err != nil && err != discovery.ErrDiscoveryDisabled { 152 return err 153 } 154 } 155 156 if daemon.clusterProvider != nil { 157 if err := conf.IsSwarmCompatible(); err != nil { 158 return err 159 } 160 } 161 162 // check discovery modifications 163 if !config.ModifiedDiscoverySettings(daemon.configStore, newClusterStore, newAdvertise, conf.ClusterOpts) { 164 return nil 165 } 166 167 // enable discovery for the first time if it was not previously enabled 168 if daemon.discoveryWatcher == nil { 169 discoveryWatcher, err := discovery.Init(newClusterStore, newAdvertise, conf.ClusterOpts) 170 if err != nil { 171 return fmt.Errorf("failed to initialize discovery: %v", err) 172 } 173 daemon.discoveryWatcher = discoveryWatcher 174 } else if err == discovery.ErrDiscoveryDisabled { 175 // disable discovery if it was previously enabled and it's disabled now 176 daemon.discoveryWatcher.Stop() 177 } else if err = daemon.discoveryWatcher.Reload(conf.ClusterStore, newAdvertise, conf.ClusterOpts); err != nil { 178 // reload discovery 179 return err 180 } 181 182 daemon.configStore.ClusterStore = newClusterStore 183 daemon.configStore.ClusterOpts = conf.ClusterOpts 184 daemon.configStore.ClusterAdvertise = newAdvertise 185 186 if daemon.netController == nil { 187 return nil 188 } 189 netOptions, err := daemon.networkOptions(daemon.configStore, daemon.PluginStore, nil) 190 if err != nil { 191 logrus.WithError(err).Warnf("failed to get options with network controller") 192 return nil 193 } 194 err = daemon.netController.ReloadConfiguration(netOptions...) 195 if err != nil { 196 logrus.Warnf("Failed to reload configuration with network controller: %v", err) 197 } 198 return nil 199 } 200 201 // reloadLabels updates configuration with engine labels 202 // and updates the passed attributes 203 func (daemon *Daemon) reloadLabels(conf *config.Config, attributes map[string]string) error { 204 // update corresponding configuration 205 if conf.IsValueSet("labels") { 206 daemon.configStore.Labels = conf.Labels 207 } 208 209 // prepare reload event attributes with updatable configurations 210 if daemon.configStore.Labels != nil { 211 labels, err := json.Marshal(daemon.configStore.Labels) 212 if err != nil { 213 return err 214 } 215 attributes["labels"] = string(labels) 216 } else { 217 attributes["labels"] = "[]" 218 } 219 220 return nil 221 } 222 223 // reloadAllowNondistributableArtifacts updates the configuration with allow-nondistributable-artifacts options 224 // and updates the passed attributes. 225 func (daemon *Daemon) reloadAllowNondistributableArtifacts(conf *config.Config, attributes map[string]string) error { 226 // Update corresponding configuration. 227 if conf.IsValueSet("allow-nondistributable-artifacts") { 228 daemon.configStore.AllowNondistributableArtifacts = conf.AllowNondistributableArtifacts 229 if err := daemon.RegistryService.LoadAllowNondistributableArtifacts(conf.AllowNondistributableArtifacts); err != nil { 230 return err 231 } 232 } 233 234 // Prepare reload event attributes with updatable configurations. 235 if daemon.configStore.AllowNondistributableArtifacts != nil { 236 v, err := json.Marshal(daemon.configStore.AllowNondistributableArtifacts) 237 if err != nil { 238 return err 239 } 240 attributes["allow-nondistributable-artifacts"] = string(v) 241 } else { 242 attributes["allow-nondistributable-artifacts"] = "[]" 243 } 244 245 return nil 246 } 247 248 // reloadInsecureRegistries updates configuration with insecure registry option 249 // and updates the passed attributes 250 func (daemon *Daemon) reloadInsecureRegistries(conf *config.Config, attributes map[string]string) error { 251 // update corresponding configuration 252 if conf.IsValueSet("insecure-registries") { 253 daemon.configStore.InsecureRegistries = conf.InsecureRegistries 254 if err := daemon.RegistryService.LoadInsecureRegistries(conf.InsecureRegistries); err != nil { 255 return err 256 } 257 } 258 259 // prepare reload event attributes with updatable configurations 260 if daemon.configStore.InsecureRegistries != nil { 261 insecureRegistries, err := json.Marshal(daemon.configStore.InsecureRegistries) 262 if err != nil { 263 return err 264 } 265 attributes["insecure-registries"] = string(insecureRegistries) 266 } else { 267 attributes["insecure-registries"] = "[]" 268 } 269 270 return nil 271 } 272 273 // reloadRegistryMirrors updates configuration with registry mirror options 274 // and updates the passed attributes 275 func (daemon *Daemon) reloadRegistryMirrors(conf *config.Config, attributes map[string]string) error { 276 // update corresponding configuration 277 if conf.IsValueSet("registry-mirrors") { 278 daemon.configStore.Mirrors = conf.Mirrors 279 if err := daemon.RegistryService.LoadMirrors(conf.Mirrors); err != nil { 280 return err 281 } 282 } 283 284 // prepare reload event attributes with updatable configurations 285 if daemon.configStore.Mirrors != nil { 286 mirrors, err := json.Marshal(daemon.configStore.Mirrors) 287 if err != nil { 288 return err 289 } 290 attributes["registry-mirrors"] = string(mirrors) 291 } else { 292 attributes["registry-mirrors"] = "[]" 293 } 294 295 return nil 296 } 297 298 // reloadLiveRestore updates configuration with live retore option 299 // and updates the passed attributes 300 func (daemon *Daemon) reloadLiveRestore(conf *config.Config, attributes map[string]string) error { 301 // update corresponding configuration 302 if conf.IsValueSet("live-restore") { 303 daemon.configStore.LiveRestoreEnabled = conf.LiveRestoreEnabled 304 if err := daemon.containerdRemote.UpdateOptions(libcontainerd.WithLiveRestore(conf.LiveRestoreEnabled)); err != nil { 305 return err 306 } 307 } 308 309 // prepare reload event attributes with updatable configurations 310 attributes["live-restore"] = fmt.Sprintf("%t", daemon.configStore.LiveRestoreEnabled) 311 return nil 312 }