Merge branch 'master' into dev-2.0

CHANGELOG.md

@@ -1,3 +1,33 @@
+## 1.8.0 / 2017-10-06
+
+* [CHANGE] Rule links link to the _Console_ tab rather than the _Graph_ tab to
+  not trigger expensive range queries by default.
+* [FEATURE] Ability to act as a remote read endpoint for other Prometheus
+  servers.
+* [FEATURE] K8s SD: Support discovery of ingresses.
+* [FEATURE] Consul SD: Support for node metadata.
+* [FEATURE] Openstack SD: Support discovery of hypervisors.
+* [FEATURE] Expose current Prometheus config via `/status/config`.
+* [FEATURE] Allow to collapse jobs on `/targets` page.
+* [FEATURE] Add `/-/healthy` and `/-/ready` endpoints.
+* [FEATURE] Add color scheme support to console templates.
+* [ENHANCEMENT] Remote storage connections use HTTP keep-alive.
+* [ENHANCEMENT] Improved logging about remote storage.
+* [ENHANCEMENT] Relaxed URL validation.
+* [ENHANCEMENT] Openstack SD: Handle instances without IP.
+* [ENHANCEMENT] Make remote storage queue manager configurable.
+* [ENHANCEMENT] Validate metrics returned from remote read.
+* [ENHANCEMENT] EC2 SD: Set a default region.
+* [ENHANCEMENT] Changed help link to `https://prometheus.io/docs`.
+* [BUGFIX] Fix floating-point precision issue in `deriv` function.
+* [BUGFIX] Fix pprof endpoints when -web.route-prefix or -web.external-url is
+  used.
+* [BUGFIX] Fix handling of `null` target groups in file-based SD.
+* [BUGFIX] Set the sample timestamp in date-related PromQL functions.
+* [BUGFIX] Apply path prefix to redirect from deprecated graph URL.
+* [BUGFIX] Fixed tests on MS Windows.
+* [BUGFIX] Check for invalid UTF-8 in label values after relabeling.
+
 ## v2.0.0-rc.0 / 2017-10-05
 
 This release includes numerous changes to the new storage layer. The main changes are:

documentation/examples/remote_storage/remote_storage_adapter/graphite/client.go

@@ -93,7 +93,7 @@ func (c *Client) Write(samples model.Samples) error {
 		t := float64(s.Timestamp.UnixNano()) / 1e9
 		v := float64(s.Value)
 		if math.IsNaN(v) || math.IsInf(v, 0) {
-			level.Warn(c.logger).Log("msg", "cannot send value to Graphite, skipping sample", "value", v, "sample", s)
+			level.Debug(c.logger).Log("msg", "cannot send value to Graphite, skipping sample", "value", v, "sample", s)
 			continue
 		}
 		fmt.Fprintf(&buf, "%s %f %f\n", k, v, t)

documentation/examples/remote_storage/remote_storage_adapter/opentsdb/client.go

@@ -79,7 +79,7 @@ func (c *Client) Write(samples model.Samples) error {
 	for _, s := range samples {
 		v := float64(s.Value)
 		if math.IsNaN(v) || math.IsInf(v, 0) {
-			level.Warn(c.logger).Log("msg", "cannot send value to OpenTSDB, skipping sample", "value", v, "sample", s)
+			level.Debug(c.logger).Log("msg", "cannot send value to OpenTSDB, skipping sample", "value", v, "sample", s)
 			continue
 		}
 		metric := TagValue(s.Metric[model.MetricNameLabel])

web/api/v1/api.go

@@ -106,10 +106,18 @@ type API struct {
 
 	now    func() time.Time
 	config func() config.Config
+	ready  func(http.HandlerFunc) http.HandlerFunc
 }
 
 // NewAPI returns an initialized API type.
-func NewAPI(qe *promql.Engine, q promql.Queryable, tr targetRetriever, ar alertmanagerRetriever, configFunc func() config.Config) *API {
+func NewAPI(
+	qe *promql.Engine,
+	q promql.Queryable,
+	tr targetRetriever,
+	ar alertmanagerRetriever,
+	configFunc func() config.Config,
+	readyFunc func(http.HandlerFunc) http.HandlerFunc,
+) *API {
 	return &API{
 		QueryEngine:           qe,
 		Queryable:             q,
@@ -117,6 +125,7 @@ func NewAPI(qe *promql.Engine, q promql.Queryable, tr targetRetriever, ar alertm
 		alertmanagerRetriever: ar,
 		now:    time.Now,
 		config: configFunc,
+		ready:  readyFunc,
 	}
 }
 
@@ -133,9 +142,9 @@ func (api *API) Register(r *route.Router) {
 				w.WriteHeader(http.StatusNoContent)
 			}
 		})
-		return prometheus.InstrumentHandler(name, httputil.CompressionHandler{
+		return api.ready(prometheus.InstrumentHandler(name, httputil.CompressionHandler{
 			Handler: hf,
-		})
+		}))
 	}
 
 	r.Options("/*path", instr("options", api.options))

web/api/v1/api_test.go

@@ -104,6 +104,7 @@ func TestEndpoints(t *testing.T) {
 		alertmanagerRetriever: ar,
 		now:    func() time.Time { return now },
 		config: func() config.Config { return samplePrometheusCfg },
+		ready:  func(f http.HandlerFunc) http.HandlerFunc { return f },
 	}
 
 	start := time.Unix(0, 0)
@@ -658,7 +659,7 @@ func TestParseDuration(t *testing.T) {
 
 func TestOptionsMethod(t *testing.T) {
 	r := route.New()
-	api := &API{}
+	api := &API{ready: func(f http.HandlerFunc) http.HandlerFunc { return f }}
 	api.Register(r)
 
 	s := httptest.NewServer(r)

web/web.go

@@ -187,6 +187,7 @@ func New(logger log.Logger, o *Options) *Handler {
 			defer h.mtx.RUnlock()
 			return *h.config
 		},
+		h.testReady,
 	)
 
 	if o.RoutePrefix != "/" {