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// +build !windows,!solaris
package main
import (
"fmt"
"net"
"os"
"os/signal"
"path/filepath"
"strconv"
"github.com/docker/docker/cmd/dockerd/hack"
"github.com/docker/docker/daemon"
"github.com/docker/docker/libcontainerd"
"github.com/docker/libnetwork/portallocator"
"golang.org/x/sys/unix"
)
const defaultDaemonConfigFile = "/etc/docker/daemon.json"
// setDefaultUmask sets the umask to 0022 to avoid problems
// caused by custom umask
func setDefaultUmask() error {
desiredUmask := 0022
unix.Umask(desiredUmask)
if umask := unix.Umask(desiredUmask); umask != desiredUmask {
return fmt.Errorf("failed to set umask: expected %#o, got %#o", desiredUmask, umask)
}
return nil
}
func getDaemonConfDir(_ string) string {
return "/etc/docker"
}
// setupConfigReloadTrap configures the USR2 signal to reload the configuration.
func (cli *DaemonCli) setupConfigReloadTrap() {
c := make(chan os.Signal, 1)
signal.Notify(c, unix.SIGHUP)
go func() {
for range c {
cli.reloadConfig()
}
}()
}
func (cli *DaemonCli) getPlatformRemoteOptions() []libcontainerd.RemoteOption {
opts := []libcontainerd.RemoteOption{
libcontainerd.WithDebugLog(cli.Config.Debug),
libcontainerd.WithOOMScore(cli.Config.OOMScoreAdjust),
}
if cli.Config.ContainerdAddr != "" {
opts = append(opts, libcontainerd.WithRemoteAddr(cli.Config.ContainerdAddr))
} else {
opts = append(opts, libcontainerd.WithStartDaemon(true))
}
if daemon.UsingSystemd(cli.Config) {
args := []string{"--systemd-cgroup=true"}
opts = append(opts, libcontainerd.WithRuntimeArgs(args))
}
if cli.Config.LiveRestoreEnabled {
opts = append(opts, libcontainerd.WithLiveRestore(true))
}
opts = append(opts, libcontainerd.WithRuntimePath(daemon.DefaultRuntimeBinary))
return opts
}
// getLibcontainerdRoot gets the root directory for libcontainerd/containerd to
// store their state.
func (cli *DaemonCli) getLibcontainerdRoot() string {
return filepath.Join(cli.Config.ExecRoot, "libcontainerd")
}
// getSwarmRunRoot gets the root directory for swarm to store runtime state
// For example, the control socket
func (cli *DaemonCli) getSwarmRunRoot() string {
return filepath.Join(cli.Config.ExecRoot, "swarm")
}
// allocateDaemonPort ensures that there are no containers
// that try to use any port allocated for the docker server.
func allocateDaemonPort(addr string) error {
host, port, err := net.SplitHostPort(addr)
if err != nil {
return err
}
intPort, err := strconv.Atoi(port)
if err != nil {
return err
}
var hostIPs []net.IP
if parsedIP := net.ParseIP(host); parsedIP != nil {
hostIPs = append(hostIPs, parsedIP)
} else if hostIPs, err = net.LookupIP(host); err != nil {
return fmt.Errorf("failed to lookup %s address in host specification", host)
}
pa := portallocator.Get()
for _, hostIP := range hostIPs {
if _, err := pa.RequestPort(hostIP, "tcp", intPort); err != nil {
return fmt.Errorf("failed to allocate daemon listening port %d (err: %v)", intPort, err)
}
}
return nil
}
// notifyShutdown is called after the daemon shuts down but before the process exits.
func notifyShutdown(err error) {
}
func wrapListeners(proto string, ls []net.Listener) []net.Listener {
switch proto {
case "unix":
ls[0] = &hack.MalformedHostHeaderOverride{ls[0]}
case "fd":
for i := range ls {
ls[i] = &hack.MalformedHostHeaderOverride{ls[i]}
}
}
return ls
}
|
