Merge pull request #984 from AkihiroSuda/sd-notify

buildkitd: support sd_notify

cmd/buildkitd/main.go

@@ -19,6 +19,7 @@ import (
 	"github.com/containerd/containerd/pkg/seed"
 	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/containerd/sys"
+	sddaemon "github.com/coreos/go-systemd/daemon"
 	"github.com/docker/docker/pkg/reexec"
 	"github.com/docker/go-connections/sockets"
 	"github.com/gofrs/flock"
@@ -267,6 +268,10 @@ func main() {
 		}
 
 		logrus.Infof("stopping server")
+		if os.Getenv("NOTIFY_SOCKET") != "" {
+			notified, notifyErr := sddaemon.SdNotify(false, sddaemon.SdNotifyStopping)
+			logrus.Debugf("SdNotifyStopping notified=%v, err=%v", notified, notifyErr)
+		}
 		server.GracefulStop()
 
 		return err
@@ -304,6 +309,11 @@ func serveGRPC(cfg config.GRPCConfig, server *grpc.Server, errCh chan error) err
 		}
 		listeners = append(listeners, l)
 	}
+
+	if os.Getenv("NOTIFY_SOCKET") != "" {
+		notified, notifyErr := sddaemon.SdNotify(false, sddaemon.SdNotifyReady)
+		logrus.Debugf("SdNotifyReady notified=%v, err=%v", notified, notifyErr)
+	}
 	for _, l := range listeners {
 		func(l net.Listener) {
 			eg.Go(func() error {

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3
 	github.com/containerd/ttrpc v0.0.0-20190411181408-699c4e40d1e7 // indirect
 	github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd // indirect
-	github.com/coreos/go-systemd v0.0.0-20161114122254-48702e0da86b // indirect
+	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e
 	github.com/docker/cli v0.0.0-20190321234815-f40f9c240ab0
 	github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible
 	github.com/docker/docker v1.14.0-0.20190319215453-e7b5f7dbe98c

go.sum

@@ -28,8 +28,8 @@ github.com/containerd/ttrpc v0.0.0-20190411181408-699c4e40d1e7 h1:SKDlsIhYxNE1LO
 github.com/containerd/ttrpc v0.0.0-20190411181408-699c4e40d1e7/go.mod h1:PvCDdDGpgqzQIzDW1TphrGLssLDZp2GuS+X5DkEJB8o=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd h1:JNn81o/xG+8NEo3bC/vx9pbi/g2WI8mtP2/nXzu297Y=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kwCdlkCfMSHURc+r6fwoGH6/F1hH3S4sg0rLFWPc=
-github.com/coreos/go-systemd v0.0.0-20161114122254-48702e0da86b h1:+mtZ0WjVZwTX0RVrXMXDwuYVaNeHGvWBW1UwJeMR+2M=
-github.com/coreos/go-systemd v0.0.0-20161114122254-48702e0da86b/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9/ZjdUKyjop4mf3Qdd+1TvvltAvM3m8=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=