Merge pull request #459 from galal-hussein/check_time

Check if server time before 1/1/1970

pkg/cli/server/server.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	systemd "github.com/coreos/go-systemd/daemon"
 	"github.com/docker/docker/pkg/reexec"
@@ -67,6 +68,10 @@ func run(app *cli.Context, cfg *cmds.Server) error {
 		return runWithLogging(app, cfg)
 	}
 
+	if err := checkUnixTimestamp(); err != nil {
+		return err
+	}
+
 	setupLogging(app)
 
 	if !cfg.DisableAgent && os.Getuid() != 0 && !cfg.Rootless {
@@ -180,3 +185,12 @@ func knownIPs(ips []string) []string {
 	}
 	return ips
 }
+
+func checkUnixTimestamp() error {
+	timeNow := time.Now()
+	// check if time before 01/01/1980
+	if timeNow.Before(time.Unix(315532800, 0)) {
+		return fmt.Errorf("server time isn't set properly: %v", timeNow)
+	}
+	return nil
+}