// +build linux freebsd package daemon import ( "fmt" "net" "github.com/docker/docker/opts" flag "github.com/docker/docker/pkg/mflag" runconfigopts "github.com/docker/docker/runconfig/opts" "github.com/docker/engine-api/types" "github.com/docker/go-units" ) var ( defaultPidFile = "/var/run/docker.pid" defaultGraph = "/var/lib/docker" defaultExecRoot = "/var/run/docker" ) // Config defines the configuration of a docker daemon. // It includes json tags to deserialize configuration from a file // using the same names that the flags in the command line uses. type Config struct { CommonConfig // Fields below here are platform specific. CgroupParent string `json:"cgroup-parent,omitempty"` ContainerdAddr string `json:"containerd,omitempty"` EnableSelinuxSupport bool `json:"selinux-enabled,omitempty"` ExecRoot string `json:"exec-root,omitempty"` RemappedRoot string `json:"userns-remap,omitempty"` Ulimits map[string]*units.Ulimit `json:"default-ulimits,omitempty"` Runtimes map[string]types.Runtime `json:"runtimes,omitempty"` DefaultRuntime string `json:"default-runtime,omitempty"` OOMScoreAdjust int `json:"oom-score-adjust,omitempty"` } // bridgeConfig stores all the bridge driver specific // configuration. type bridgeConfig struct { commonBridgeConfig // Fields below here are platform specific. EnableIPv6 bool `json:"ipv6,omitempty"` EnableIPTables bool `json:"iptables,omitempty"` EnableIPForward bool `json:"ip-forward,omitempty"` EnableIPMasq bool `json:"ip-masq,omitempty"` EnableUserlandProxy bool `json:"userland-proxy,omitempty"` DefaultIP net.IP `json:"ip,omitempty"` IP string `json:"bip,omitempty"` FixedCIDRv6 string `json:"fixed-cidr-v6,omitempty"` DefaultGatewayIPv4 net.IP `json:"default-gateway,omitempty"` DefaultGatewayIPv6 net.IP `json:"default-gateway-v6,omitempty"` InterContainerCommunication bool `json:"icc,omitempty"` } // InstallFlags adds command-line options to the top-level flag parser for // the current process. // Subsequent calls to `flag.Parse` will populate config with values parsed // from the command-line. func (config *Config) InstallFlags(cmd *flag.FlagSet, usageFn func(string) string) { // First handle install flags which are consistent cross-platform config.InstallCommonFlags(cmd, usageFn) // Then platform-specific install flags cmd.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, usageFn("Enable selinux support")) cmd.StringVar(&config.SocketGroup, []string{"G", "-group"}, "docker", usageFn("Group for the unix socket")) config.Ulimits = make(map[string]*units.Ulimit) cmd.Var(runconfigopts.NewUlimitOpt(&config.Ulimits), []string{"-default-ulimit"}, usageFn("Default ulimits for containers")) cmd.BoolVar(&config.bridgeConfig.EnableIPTables, []string{"#iptables", "-iptables"}, true, usageFn("Enable addition of iptables rules")) cmd.BoolVar(&config.bridgeConfig.EnableIPForward, []string{"#ip-forward", "-ip-forward"}, true, usageFn("Enable net.ipv4.ip_forward")) cmd.BoolVar(&config.bridgeConfig.EnableIPMasq, []string{"-ip-masq"}, true, usageFn("Enable IP masquerading")) cmd.BoolVar(&config.bridgeConfig.EnableIPv6, []string{"-ipv6"}, false, usageFn("Enable IPv6 networking")) cmd.StringVar(&config.ExecRoot, []string{"-exec-root"}, defaultExecRoot, usageFn("Root directory for execution state files")) cmd.StringVar(&config.bridgeConfig.IP, []string{"#bip", "-bip"}, "", usageFn("Specify network bridge IP")) cmd.StringVar(&config.bridgeConfig.Iface, []string{"b", "-bridge"}, "", usageFn("Attach containers to a network bridge")) cmd.StringVar(&config.bridgeConfig.FixedCIDR, []string{"-fixed-cidr"}, "", usageFn("IPv4 subnet for fixed IPs")) cmd.StringVar(&config.bridgeConfig.FixedCIDRv6, []string{"-fixed-cidr-v6"}, "", usageFn("IPv6 subnet for fixed IPs")) cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv4, ""), []string{"-default-gateway"}, usageFn("Container default gateway IPv4 address")) cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv6, ""), []string{"-default-gateway-v6"}, usageFn("Container default gateway IPv6 address")) cmd.BoolVar(&config.bridgeConfig.InterContainerCommunication, []string{"#icc", "-icc"}, true, usageFn("Enable inter-container communication")) cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultIP, "0.0.0.0"), []string{"#ip", "-ip"}, usageFn("Default IP when binding container ports")) cmd.BoolVar(&config.bridgeConfig.EnableUserlandProxy, []string{"-userland-proxy"}, true, usageFn("Use userland proxy for loopback traffic")) cmd.BoolVar(&config.EnableCors, []string{"#api-enable-cors", "#-api-enable-cors"}, false, usageFn("Enable CORS headers in the remote API, this is deprecated by --api-cors-header")) cmd.StringVar(&config.CgroupParent, []string{"-cgroup-parent"}, "", usageFn("Set parent cgroup for all containers")) cmd.StringVar(&config.RemappedRoot, []string{"-userns-remap"}, "", usageFn("User/Group setting for user namespaces")) cmd.StringVar(&config.ContainerdAddr, []string{"-containerd"}, "", usageFn("Path to containerd socket")) cmd.BoolVar(&config.LiveRestoreEnabled, []string{"-live-restore"}, false, usageFn("Enable live restore of docker when containers are still running")) config.Runtimes = make(map[string]types.Runtime) cmd.Var(runconfigopts.NewNamedRuntimeOpt("runtimes", &config.Runtimes, stockRuntimeName), []string{"-add-runtime"}, usageFn("Register an additional OCI compatible runtime")) cmd.StringVar(&config.DefaultRuntime, []string{"-default-runtime"}, stockRuntimeName, usageFn("Default OCI runtime for containers")) cmd.IntVar(&config.OOMScoreAdjust, []string{"-oom-score-adjust"}, -500, usageFn("Set the oom_score_adj for the daemon")) config.attachExperimentalFlags(cmd, usageFn) } // GetRuntime returns the runtime path and arguments for a given // runtime name func (config *Config) GetRuntime(name string) *types.Runtime { config.reloadLock.Lock() defer config.reloadLock.Unlock() if rt, ok := config.Runtimes[name]; ok { return &rt } return nil } // GetDefaultRuntimeName returns the current default runtime func (config *Config) GetDefaultRuntimeName() string { config.reloadLock.Lock() rt := config.DefaultRuntime config.reloadLock.Unlock() return rt } // GetAllRuntimes returns a copy of the runtimes map func (config *Config) GetAllRuntimes() map[string]types.Runtime { config.reloadLock.Lock() rts := config.Runtimes config.reloadLock.Unlock() return rts } // GetExecRoot returns the user configured Exec-root func (config *Config) GetExecRoot() string { return config.ExecRoot } func (config *Config) isSwarmCompatible() error { if config.ClusterStore != "" || config.ClusterAdvertise != "" { return fmt.Errorf("--cluster-store and --cluster-advertise daemon configurations are incompatible with swarm mode") } if config.LiveRestoreEnabled { return fmt.Errorf("--live-restore daemon configuration is incompatible with swarm mode") } return nil }