github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/cmd/dockerd/config_unix.go (about) 1 // +build linux freebsd 2 3 package main 4 5 import ( 6 "os/exec" 7 8 "github.com/demonoid81/moby/daemon/config" 9 "github.com/demonoid81/moby/opts" 10 "github.com/demonoid81/moby/rootless" 11 units "github.com/docker/go-units" 12 "github.com/opencontainers/runc/libcontainer/cgroups" 13 "github.com/pkg/errors" 14 "github.com/spf13/pflag" 15 ) 16 17 // installConfigFlags adds flags to the pflag.FlagSet to configure the daemon 18 func installConfigFlags(conf *config.Config, flags *pflag.FlagSet) error { 19 // First handle install flags which are consistent cross-platform 20 if err := installCommonConfigFlags(conf, flags); err != nil { 21 return err 22 } 23 24 // Then install flags common to unix platforms 25 installUnixConfigFlags(conf, flags) 26 27 conf.Ulimits = make(map[string]*units.Ulimit) 28 conf.NetworkConfig.DefaultAddressPools = opts.PoolsOpt{} 29 30 // Set default value for `--default-shm-size` 31 conf.ShmSize = opts.MemBytes(config.DefaultShmSize) 32 33 // Then platform-specific install flags 34 flags.BoolVar(&conf.EnableSelinuxSupport, "selinux-enabled", false, "Enable selinux support") 35 flags.Var(opts.NewNamedUlimitOpt("default-ulimits", &conf.Ulimits), "default-ulimit", "Default ulimits for containers") 36 flags.BoolVar(&conf.BridgeConfig.EnableIPTables, "iptables", true, "Enable addition of iptables rules") 37 flags.BoolVar(&conf.BridgeConfig.EnableIPForward, "ip-forward", true, "Enable net.ipv4.ip_forward") 38 flags.BoolVar(&conf.BridgeConfig.EnableIPMasq, "ip-masq", true, "Enable IP masquerading") 39 flags.BoolVar(&conf.BridgeConfig.EnableIPv6, "ipv6", false, "Enable IPv6 networking") 40 flags.StringVar(&conf.BridgeConfig.FixedCIDRv6, "fixed-cidr-v6", "", "IPv6 subnet for fixed IPs") 41 flags.BoolVar(&conf.BridgeConfig.EnableUserlandProxy, "userland-proxy", true, "Use userland proxy for loopback traffic") 42 defaultUserlandProxyPath := "" 43 if rootless.RunningWithRootlessKit() { 44 var err error 45 // use rootlesskit-docker-proxy for exposing the ports in RootlessKit netns to the initial namespace. 46 defaultUserlandProxyPath, err = exec.LookPath(rootless.RootlessKitDockerProxyBinary) 47 if err != nil { 48 return errors.Wrapf(err, "running with RootlessKit, but %s not installed", rootless.RootlessKitDockerProxyBinary) 49 } 50 } 51 flags.StringVar(&conf.BridgeConfig.UserlandProxyPath, "userland-proxy-path", defaultUserlandProxyPath, "Path to the userland proxy binary") 52 flags.StringVar(&conf.CgroupParent, "cgroup-parent", "", "Set parent cgroup for all containers") 53 flags.StringVar(&conf.RemappedRoot, "userns-remap", "", "User/Group setting for user namespaces") 54 flags.BoolVar(&conf.LiveRestoreEnabled, "live-restore", false, "Enable live restore of docker when containers are still running") 55 flags.IntVar(&conf.OOMScoreAdjust, "oom-score-adjust", -500, "Set the oom_score_adj for the daemon") 56 flags.BoolVar(&conf.Init, "init", false, "Run an init in the container to forward signals and reap processes") 57 flags.StringVar(&conf.InitPath, "init-path", "", "Path to the docker-init binary") 58 flags.Int64Var(&conf.CPURealtimePeriod, "cpu-rt-period", 0, "Limit the CPU real-time period in microseconds for the parent cgroup for all containers") 59 flags.Int64Var(&conf.CPURealtimeRuntime, "cpu-rt-runtime", 0, "Limit the CPU real-time runtime in microseconds for the parent cgroup for all containers") 60 flags.StringVar(&conf.SeccompProfile, "seccomp-profile", "", "Path to seccomp profile") 61 flags.Var(&conf.ShmSize, "default-shm-size", "Default shm size for containers") 62 flags.BoolVar(&conf.NoNewPrivileges, "no-new-privileges", false, "Set no-new-privileges by default for new containers") 63 flags.StringVar(&conf.IpcMode, "default-ipc-mode", config.DefaultIpcMode, `Default mode for containers ipc ("shareable" | "private")`) 64 flags.Var(&conf.NetworkConfig.DefaultAddressPools, "default-address-pool", "Default address pools for node specific local networks") 65 // rootless needs to be explicitly specified for running "rootful" dockerd in rootless dockerd (#38702) 66 // Note that defaultUserlandProxyPath and honorXDG are configured according to the value of rootless.RunningWithRootlessKit, not the value of --rootless. 67 flags.BoolVar(&conf.Rootless, "rootless", rootless.RunningWithRootlessKit(), "Enable rootless mode; typically used with RootlessKit") 68 defaultCgroupNamespaceMode := "host" 69 if cgroups.IsCgroup2UnifiedMode() { 70 defaultCgroupNamespaceMode = "private" 71 } 72 flags.StringVar(&conf.CgroupNamespaceMode, "default-cgroupns-mode", defaultCgroupNamespaceMode, `Default mode for containers cgroup namespace ("host" | "private")`) 73 return nil 74 }