github.com/mhy12345/docker@v1.12.3/daemon/config_unix.go (about) 1 // +build linux freebsd 2 3 package daemon 4 5 import ( 6 "fmt" 7 "net" 8 9 "github.com/docker/docker/opts" 10 flag "github.com/docker/docker/pkg/mflag" 11 runconfigopts "github.com/docker/docker/runconfig/opts" 12 "github.com/docker/engine-api/types" 13 "github.com/docker/go-units" 14 ) 15 16 var ( 17 defaultPidFile = "/var/run/docker.pid" 18 defaultGraph = "/var/lib/docker" 19 defaultExecRoot = "/var/run/docker" 20 ) 21 22 // Config defines the configuration of a docker daemon. 23 // It includes json tags to deserialize configuration from a file 24 // using the same names that the flags in the command line uses. 25 type Config struct { 26 CommonConfig 27 28 // Fields below here are platform specific. 29 CgroupParent string `json:"cgroup-parent,omitempty"` 30 ContainerdAddr string `json:"containerd,omitempty"` 31 EnableSelinuxSupport bool `json:"selinux-enabled,omitempty"` 32 ExecRoot string `json:"exec-root,omitempty"` 33 RemappedRoot string `json:"userns-remap,omitempty"` 34 Ulimits map[string]*units.Ulimit `json:"default-ulimits,omitempty"` 35 Runtimes map[string]types.Runtime `json:"runtimes,omitempty"` 36 DefaultRuntime string `json:"default-runtime,omitempty"` 37 OOMScoreAdjust int `json:"oom-score-adjust,omitempty"` 38 } 39 40 // bridgeConfig stores all the bridge driver specific 41 // configuration. 42 type bridgeConfig struct { 43 commonBridgeConfig 44 45 // Fields below here are platform specific. 46 EnableIPv6 bool `json:"ipv6,omitempty"` 47 EnableIPTables bool `json:"iptables,omitempty"` 48 EnableIPForward bool `json:"ip-forward,omitempty"` 49 EnableIPMasq bool `json:"ip-masq,omitempty"` 50 EnableUserlandProxy bool `json:"userland-proxy,omitempty"` 51 DefaultIP net.IP `json:"ip,omitempty"` 52 IP string `json:"bip,omitempty"` 53 FixedCIDRv6 string `json:"fixed-cidr-v6,omitempty"` 54 DefaultGatewayIPv4 net.IP `json:"default-gateway,omitempty"` 55 DefaultGatewayIPv6 net.IP `json:"default-gateway-v6,omitempty"` 56 InterContainerCommunication bool `json:"icc,omitempty"` 57 } 58 59 // InstallFlags adds command-line options to the top-level flag parser for 60 // the current process. 61 // Subsequent calls to `flag.Parse` will populate config with values parsed 62 // from the command-line. 63 func (config *Config) InstallFlags(cmd *flag.FlagSet, usageFn func(string) string) { 64 // First handle install flags which are consistent cross-platform 65 config.InstallCommonFlags(cmd, usageFn) 66 67 // Then platform-specific install flags 68 cmd.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, usageFn("Enable selinux support")) 69 cmd.StringVar(&config.SocketGroup, []string{"G", "-group"}, "docker", usageFn("Group for the unix socket")) 70 config.Ulimits = make(map[string]*units.Ulimit) 71 cmd.Var(runconfigopts.NewUlimitOpt(&config.Ulimits), []string{"-default-ulimit"}, usageFn("Default ulimits for containers")) 72 cmd.BoolVar(&config.bridgeConfig.EnableIPTables, []string{"#iptables", "-iptables"}, true, usageFn("Enable addition of iptables rules")) 73 cmd.BoolVar(&config.bridgeConfig.EnableIPForward, []string{"#ip-forward", "-ip-forward"}, true, usageFn("Enable net.ipv4.ip_forward")) 74 cmd.BoolVar(&config.bridgeConfig.EnableIPMasq, []string{"-ip-masq"}, true, usageFn("Enable IP masquerading")) 75 cmd.BoolVar(&config.bridgeConfig.EnableIPv6, []string{"-ipv6"}, false, usageFn("Enable IPv6 networking")) 76 cmd.StringVar(&config.ExecRoot, []string{"-exec-root"}, defaultExecRoot, usageFn("Root directory for execution state files")) 77 cmd.StringVar(&config.bridgeConfig.IP, []string{"#bip", "-bip"}, "", usageFn("Specify network bridge IP")) 78 cmd.StringVar(&config.bridgeConfig.Iface, []string{"b", "-bridge"}, "", usageFn("Attach containers to a network bridge")) 79 cmd.StringVar(&config.bridgeConfig.FixedCIDR, []string{"-fixed-cidr"}, "", usageFn("IPv4 subnet for fixed IPs")) 80 cmd.StringVar(&config.bridgeConfig.FixedCIDRv6, []string{"-fixed-cidr-v6"}, "", usageFn("IPv6 subnet for fixed IPs")) 81 cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv4, ""), []string{"-default-gateway"}, usageFn("Container default gateway IPv4 address")) 82 cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv6, ""), []string{"-default-gateway-v6"}, usageFn("Container default gateway IPv6 address")) 83 cmd.BoolVar(&config.bridgeConfig.InterContainerCommunication, []string{"#icc", "-icc"}, true, usageFn("Enable inter-container communication")) 84 cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultIP, "0.0.0.0"), []string{"#ip", "-ip"}, usageFn("Default IP when binding container ports")) 85 cmd.BoolVar(&config.bridgeConfig.EnableUserlandProxy, []string{"-userland-proxy"}, true, usageFn("Use userland proxy for loopback traffic")) 86 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")) 87 cmd.StringVar(&config.CgroupParent, []string{"-cgroup-parent"}, "", usageFn("Set parent cgroup for all containers")) 88 cmd.StringVar(&config.RemappedRoot, []string{"-userns-remap"}, "", usageFn("User/Group setting for user namespaces")) 89 cmd.StringVar(&config.ContainerdAddr, []string{"-containerd"}, "", usageFn("Path to containerd socket")) 90 cmd.BoolVar(&config.LiveRestore, []string{"-live-restore"}, false, usageFn("Enable live restore of docker when containers are still running")) 91 config.Runtimes = make(map[string]types.Runtime) 92 cmd.Var(runconfigopts.NewNamedRuntimeOpt("runtimes", &config.Runtimes, stockRuntimeName), []string{"-add-runtime"}, usageFn("Register an additional OCI compatible runtime")) 93 cmd.StringVar(&config.DefaultRuntime, []string{"-default-runtime"}, stockRuntimeName, usageFn("Default OCI runtime for containers")) 94 cmd.IntVar(&config.OOMScoreAdjust, []string{"-oom-score-adjust"}, -500, usageFn("Set the oom_score_adj for the daemon")) 95 96 config.attachExperimentalFlags(cmd, usageFn) 97 } 98 99 // GetRuntime returns the runtime path and arguments for a given 100 // runtime name 101 func (config *Config) GetRuntime(name string) *types.Runtime { 102 config.reloadLock.Lock() 103 defer config.reloadLock.Unlock() 104 if rt, ok := config.Runtimes[name]; ok { 105 return &rt 106 } 107 return nil 108 } 109 110 // GetDefaultRuntimeName returns the current default runtime 111 func (config *Config) GetDefaultRuntimeName() string { 112 config.reloadLock.Lock() 113 rt := config.DefaultRuntime 114 config.reloadLock.Unlock() 115 116 return rt 117 } 118 119 // GetAllRuntimes returns a copy of the runtimes map 120 func (config *Config) GetAllRuntimes() map[string]types.Runtime { 121 config.reloadLock.Lock() 122 rts := config.Runtimes 123 config.reloadLock.Unlock() 124 return rts 125 } 126 127 // GetExecRoot returns the user configured Exec-root 128 func (config *Config) GetExecRoot() string { 129 return config.ExecRoot 130 } 131 132 func (config *Config) isSwarmCompatible() error { 133 if config.ClusterStore != "" || config.ClusterAdvertise != "" { 134 return fmt.Errorf("--cluster-store and --cluster-advertise daemon configurations are incompatible with swarm mode") 135 } 136 if config.LiveRestore { 137 return fmt.Errorf("--live-restore daemon configuration is incompatible with swarm mode") 138 } 139 return nil 140 }