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  }