github.com/devdivbcp/moby@v17.12.0-ce-rc1.0.20200726071732-2d4bfdc789ad+incompatible/cmd/dockerd/config_unix.go (about)

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