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moby--moby/docker/daemon_unix.go
David Calavera 677a6b3506 Allow to set daemon and server configurations in a file.
Read configuration after flags making this the priority:

1- Apply configuration from file.
2- Apply configuration from flags.

Reload configuration when a signal is received, USR2 in Linux:

- Reload router if the debug configuration changes.
- Reload daemon labels.
- Reload cluster discovery.

Signed-off-by: David Calavera <david.calavera@gmail.com>
2016-01-14 16:44:37 -05:00

65 lines
1.6 KiB
Go

// +build daemon,!windows
package main
import (
"fmt"
"os"
"os/signal"
"syscall"
apiserver "github.com/docker/docker/api/server"
"github.com/docker/docker/daemon"
"github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/system"
_ "github.com/docker/docker/daemon/execdriver/native"
)
const defaultDaemonConfigFile = "/etc/docker/daemon.json"
func setPlatformServerConfig(serverConfig *apiserver.Config, daemonCfg *daemon.Config) *apiserver.Config {
serverConfig.SocketGroup = daemonCfg.SocketGroup
serverConfig.EnableCors = daemonCfg.EnableCors
serverConfig.CorsHeaders = daemonCfg.CorsHeaders
return serverConfig
}
// currentUserIsOwner checks whether the current user is the owner of the given
// file.
func currentUserIsOwner(f string) bool {
if fileInfo, err := system.Stat(f); err == nil && fileInfo != nil {
if int(fileInfo.UID()) == os.Getuid() {
return true
}
}
return false
}
// setDefaultUmask sets the umask to 0022 to avoid problems
// caused by custom umask
func setDefaultUmask() error {
desiredUmask := 0022
syscall.Umask(desiredUmask)
if umask := syscall.Umask(desiredUmask); umask != desiredUmask {
return fmt.Errorf("failed to set umask: expected %#o, got %#o", desiredUmask, umask)
}
return nil
}
func getDaemonConfDir() string {
return "/etc/docker"
}
// setupConfigReloadTrap configures the USR2 signal to reload the configuration.
func setupConfigReloadTrap(configFile string, flags *mflag.FlagSet, reload func(*daemon.Config)) {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP)
go func() {
for range c {
daemon.ReloadConfiguration(configFile, flags, reload)
}
}()
}