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daemon/daemon_unix.go

@@ -0,0 +1,76 @@
+// +build !windows
+
+package daemon
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+const dockerExe = "/usr/local/bin/docker"
+const dockerdExe = "/usr/local/bin/dockerd"
+
+func startDaemon(daemon Daemon) {
+	cmd := commandDaemon(daemon)
+	if daemon.Debug {
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+	} else {
+		cmd.Stdout = ioutil.Discard
+		cmd.Stderr = ioutil.Discard
+	}
+	go func() {
+		trace(cmd)
+		cmd.Run()
+	}()
+}
+
+// helper function to create the docker daemon command.
+func commandDaemon(daemon Daemon) *exec.Cmd {
+	args := []string{
+		"--data-root", daemon.StoragePath,
+		"--host=unix:///var/run/docker.sock",
+	}
+
+	if _, err := os.Stat("/etc/docker/default.json"); err == nil {
+		args = append(args, "--seccomp-profile=/etc/docker/default.json")
+	}
+
+	if daemon.StorageDriver != "" {
+		args = append(args, "-s", daemon.StorageDriver)
+	}
+	if daemon.Insecure && daemon.Registry != "" {
+		args = append(args, "--insecure-registry", daemon.Registry)
+	}
+	if daemon.IPv6 {
+		args = append(args, "--ipv6")
+	}
+	if len(daemon.Mirror) != 0 {
+		args = append(args, "--registry-mirror", daemon.Mirror)
+	}
+	if len(daemon.Bip) != 0 {
+		args = append(args, "--bip", daemon.Bip)
+	}
+	for _, dns := range daemon.DNS {
+		args = append(args, "--dns", dns)
+	}
+	for _, dnsSearch := range daemon.DNSSearch {
+		args = append(args, "--dns-search", dnsSearch)
+	}
+	if len(daemon.MTU) != 0 {
+		args = append(args, "--mtu", daemon.MTU)
+	}
+	if daemon.Experimental {
+		args = append(args, "--experimental")
+	}
+	return exec.Command(dockerdExe, args...)
+}
+
+// trace writes each command to stdout with the command wrapped in an xml
+// tag so that it can be extracted and displayed in the logs.
+func trace(cmd *exec.Cmd) {
+	fmt.Fprintf(os.Stdout, "+ %s\n", strings.Join(cmd.Args, " "))
+}