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web: expose a version information endpoint

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This commit is contained in:
Fabian Reinartz 2015-06-16 14:57:30 +02:00
parent 39edc2df7a
commit 119801027f
1 changed files with 22 additions and 13 deletions
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35
web/web.go
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@ -14,6 +14,7 @@
package web package web
import ( import (
"encoding/json"
"fmt" "fmt"
"io" "io"
"io/ioutil" "io/ioutil"
@ -56,10 +57,10 @@ type Handler struct {
apiV1 *v1.API apiV1 *v1.API
apiLegacy *legacy.API apiLegacy *legacy.API
router *route.Router router *route.Router
quitCh chan struct{} quitCh chan struct{}
options *Options options *Options
status *PrometheusStatus statusInfo *PrometheusStatus
muAlerts sync.Mutex muAlerts sync.Mutex
} }
@ -107,10 +108,10 @@ func New(st local.Storage, qe *promql.Engine, rm *rules.Manager, status *Prometh
router := route.New() router := route.New()
h := &Handler{ h := &Handler{
router: router, router: router,
quitCh: make(chan struct{}), quitCh: make(chan struct{}),
options: o, options: o,
status: status, statusInfo: status,
ruleManager: rm, ruleManager: rm,
queryEngine: qe, queryEngine: qe,
@ -137,9 +138,10 @@ func New(st local.Storage, qe *promql.Engine, rm *rules.Manager, status *Prometh
instrf := prometheus.InstrumentHandlerFunc instrf := prometheus.InstrumentHandlerFunc
instrh := prometheus.InstrumentHandler instrh := prometheus.InstrumentHandler
router.Get("/", instrf("status", h.statush)) router.Get("/", instrf("status", h.status))
router.Get("/alerts", instrf("alerts", h.alerts)) router.Get("/alerts", instrf("alerts", h.alerts))
router.Get("/graph", instrf("graph", h.graph)) router.Get("/graph", instrf("graph", h.graph))
router.Get("/version", instrf("version", h.version))
router.Get("/heap", instrf("heap", dumpHeap)) router.Get("/heap", instrf("heap", dumpHeap))
@ -259,19 +261,26 @@ func (h *Handler) graph(w http.ResponseWriter, r *http.Request) {
h.executeTemplate(w, "graph", nil) h.executeTemplate(w, "graph", nil)
} }
func (h *Handler) statush(w http.ResponseWriter, r *http.Request) { func (h *Handler) status(w http.ResponseWriter, r *http.Request) {
h.status.mu.RLock() h.statusInfo.mu.RLock()
defer h.status.mu.RUnlock() defer h.statusInfo.mu.RUnlock()
h.executeTemplate(w, "status", struct { h.executeTemplate(w, "status", struct {
Status *PrometheusStatus Status *PrometheusStatus
Info map[string]string Info map[string]string
}{ }{
Status: h.status, Status: h.statusInfo,
Info: version.Map, Info: version.Map,
}) })
} }
func (h *Handler) version(w http.ResponseWriter, r *http.Request) {
dec := json.NewEncoder(w)
if err := dec.Encode(version.Map); err != nil {
http.Error(w, fmt.Sprintf("error encoding JSON: %s", err), http.StatusInternalServerError)
}
}
func (h *Handler) quit(w http.ResponseWriter, r *http.Request) { func (h *Handler) quit(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Requesting termination... Goodbye!") fmt.Fprintf(w, "Requesting termination... Goodbye!")
close(h.quitCh) close(h.quitCh)