Periodically check for newer versions of scope.

prog/app.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/gorilla/mux"
+	"github.com/weaveworks/go-checkpoint"
 	"github.com/weaveworks/weave/common"
 
 	"github.com/weaveworks/scope/app"
@@ -42,6 +43,19 @@ func appMain() {
 
 	defer log.Print("app exiting")
 
+	// Start background version checking
+	params := checkpoint.CheckParams{
+		Product:       "scope-app",
+		Version:       app.Version,
+		SignatureFile: signatureFile,
+	}
+	checkpoint.CheckInterval(&params, 2*60*time.Minute, func(r *checkpoint.CheckResponse, err error) {
+		if r.Outdated {
+			log.Printf("Scope version %s is availible; please update at %s",
+				r.CurrentVersion, r.CurrentDownloadURL)
+		}
+	})
+
 	rand.Seed(time.Now().UnixNano())
 	app.UniqueID = strconv.FormatInt(rand.Int63(), 16)
 	app.Version = version

prog/probe.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/armon/go-metrics"
+	"github.com/weaveworks/go-checkpoint"
 	"github.com/weaveworks/weave/common"
 
 	"github.com/weaveworks/scope/common/hostname"
@@ -30,6 +31,31 @@ import (
 	"github.com/weaveworks/scope/report"
 )
 
+const (
+	signatureFile = "/etc/weave/signature"
+)
+
+func check() {
+	handleResponse := func(r *checkpoint.CheckResponse, err error) {
+		if err != nil {
+			log.Printf("Error checking version: %v", err)
+		} else if r.Outdated {
+			log.Printf("Scope version %s is availible; please update at %s",
+				r.CurrentVersion, r.CurrentDownloadURL)
+		}
+	}
+
+	// Start background version checking
+	params := checkpoint.CheckParams{
+		Product:       "scope-probe",
+		Version:       version,
+		SignatureFile: signatureFile,
+	}
+	resp, err := checkpoint.Check(&params)
+	handleResponse(resp, err)
+	checkpoint.CheckInterval(&params, 2*60*time.Minute, handleResponse)
+}
+
 // Main runs the probe
 func probeMain() {
 	var (
@@ -77,6 +103,7 @@ func probeMain() {
 		hostID   = hostName // TODO(pb): we should sanitize the hostname
 	)
 	log.Printf("probe starting, version %s, ID %s", version, probeID)
+	go check()
 
 	addrs, err := net.InterfaceAddrs()
 	if err != nil {

scope

@@ -92,6 +92,7 @@ check_not_running() {
 launch_command() {
     echo docker run --privileged -d --name=$SCOPE_CONTAINER_NAME --net=host --pid=host \
             -v /var/run/docker.sock:/var/run/docker.sock \
+            -v /etc/weave:/etc/weave \
             $WEAVESCOPE_DOCKER_ARGS $SCOPE_IMAGE --probe.docker true "$@"
 }