mirror of
https://github.com/moby/moby.git
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125 lines
3.1 KiB
Go
125 lines
3.1 KiB
Go
// +build !windows
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package main
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import (
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"fmt"
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"net"
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"os"
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"os/signal"
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"path/filepath"
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"strconv"
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"github.com/containerd/containerd/runtime/v1/linux"
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"github.com/docker/docker/cmd/dockerd/hack"
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"github.com/docker/docker/daemon"
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"github.com/docker/docker/daemon/config"
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"github.com/docker/docker/libcontainerd/supervisor"
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"github.com/docker/libnetwork/portallocator"
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"golang.org/x/sys/unix"
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)
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const defaultDaemonConfigFile = "/etc/docker/daemon.json"
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// setDefaultUmask sets the umask to 0022 to avoid problems
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// caused by custom umask
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func setDefaultUmask() error {
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desiredUmask := 0022
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unix.Umask(desiredUmask)
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if umask := unix.Umask(desiredUmask); umask != desiredUmask {
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return fmt.Errorf("failed to set umask: expected %#o, got %#o", desiredUmask, umask)
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}
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return nil
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}
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func getDaemonConfDir(_ string) string {
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return "/etc/docker"
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}
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func (cli *DaemonCli) getPlatformContainerdDaemonOpts() ([]supervisor.DaemonOpt, error) {
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opts := []supervisor.DaemonOpt{
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supervisor.WithOOMScore(cli.Config.OOMScoreAdjust),
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supervisor.WithPlugin("linux", &linux.Config{
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Shim: daemon.DefaultShimBinary,
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Runtime: daemon.DefaultRuntimeBinary,
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RuntimeRoot: filepath.Join(cli.Config.Root, "runc"),
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ShimDebug: cli.Config.Debug,
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}),
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}
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return opts, nil
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}
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// setupConfigReloadTrap configures the USR2 signal to reload the configuration.
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func (cli *DaemonCli) setupConfigReloadTrap() {
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c := make(chan os.Signal, 1)
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signal.Notify(c, unix.SIGHUP)
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go func() {
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for range c {
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cli.reloadConfig()
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}
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}()
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}
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// getSwarmRunRoot gets the root directory for swarm to store runtime state
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// For example, the control socket
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func (cli *DaemonCli) getSwarmRunRoot() string {
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return filepath.Join(cli.Config.ExecRoot, "swarm")
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}
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// allocateDaemonPort ensures that there are no containers
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// that try to use any port allocated for the docker server.
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func allocateDaemonPort(addr string) error {
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host, port, err := net.SplitHostPort(addr)
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if err != nil {
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return err
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}
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intPort, err := strconv.Atoi(port)
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if err != nil {
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return err
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}
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var hostIPs []net.IP
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if parsedIP := net.ParseIP(host); parsedIP != nil {
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hostIPs = append(hostIPs, parsedIP)
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} else if hostIPs, err = net.LookupIP(host); err != nil {
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return fmt.Errorf("failed to lookup %s address in host specification", host)
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}
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pa := portallocator.Get()
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for _, hostIP := range hostIPs {
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if _, err := pa.RequestPort(hostIP, "tcp", intPort); err != nil {
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return fmt.Errorf("failed to allocate daemon listening port %d (err: %v)", intPort, err)
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}
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}
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return nil
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}
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func wrapListeners(proto string, ls []net.Listener) []net.Listener {
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switch proto {
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case "unix":
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ls[0] = &hack.MalformedHostHeaderOverride{Listener: ls[0]}
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case "fd":
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for i := range ls {
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ls[i] = &hack.MalformedHostHeaderOverride{Listener: ls[i]}
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}
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}
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return ls
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}
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func newCgroupParent(config *config.Config) string {
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cgroupParent := "docker"
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useSystemd := daemon.UsingSystemd(config)
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if useSystemd {
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cgroupParent = "system.slice"
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}
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if config.CgroupParent != "" {
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cgroupParent = config.CgroupParent
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}
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if useSystemd {
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cgroupParent = cgroupParent + ":" + "docker" + ":"
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}
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return cgroupParent
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}
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