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NimJayShabirmean
NimJay
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Shabirmean
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Fix Deployment Details Bug (#699)
* Improve loading of deployment details * Hide missing deployment details labels * Load deployment details once via init() * Add comment about go loadDeploymentDetails() * Simplify deployment_details.go * Remove getDeploymentDetailsIfLoaded() function Co-authored-by: Shabir Mohamed Abdul Samadh <[email protected]>
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+81
-42
lines changed

3 files changed

+81
-42
lines changed

‎src/frontend/deployment_details.go‎

Lines changed: 64 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,64 @@
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package main
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import (
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"net/http"
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"os"
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"time"
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"cloud.google.com/go/compute/metadata"
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"github.com/sirupsen/logrus"
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)
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var deploymentDetailsMap map[string]string
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var log *logrus.Logger
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func init() {
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initializeLogger()
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// Use a goroutine to ensure loadDeploymentDetails()'s GCP API
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// calls don't block non-GCP deployments. See issue #685.
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go loadDeploymentDetails()
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}
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func initializeLogger() {
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log = logrus.New()
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log.Level = logrus.DebugLevel
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log.Formatter = &logrus.JSONFormatter{
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FieldMap: logrus.FieldMap{
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logrus.FieldKeyTime: "timestamp",
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logrus.FieldKeyLevel: "severity",
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logrus.FieldKeyMsg: "message",
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},
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TimestampFormat: time.RFC3339Nano,
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}
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log.Out = os.Stdout
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}
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func loadDeploymentDetails() {
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deploymentDetailsMap = make(map[string]string)
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var metaServerClient = metadata.NewClient(&http.Client{})
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podHostname, err := os.Hostname()
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if err != nil {
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log.Error("Failed to fetch the hostname for the Pod", err)
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}
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podCluster, err := metaServerClient.InstanceAttributeValue("cluster-name")
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if err != nil {
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log.Error("Failed to fetch the name of the cluster in which the pod is running", err)
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}
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podZone, err := metaServerClient.Zone()
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if err != nil {
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log.Error("Failed to fetch the Zone of the node where the pod is scheduled", err)
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}
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deploymentDetailsMap["HOSTNAME"] = podHostname
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deploymentDetailsMap["CLUSTERNAME"] = podCluster
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deploymentDetailsMap["ZONE"] = podZone
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log.WithFields(logrus.Fields{
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"cluster": podCluster,
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"zone": podZone,
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"hostname": podHostname,
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}).Debug("Loaded deployment details")
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}

‎src/frontend/handlers.go‎

Lines changed: 5 additions & 39 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,6 @@ import (
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"strings"
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"time"
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29-
"cloud.google.com/go/compute/metadata"
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"github.com/gorilla/mux"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
@@ -116,7 +115,7 @@ func (fe *frontendServer) homeHandler(w http.ResponseWriter, r *http.Request) {
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"platform_css": plat.css,
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"platform_name": plat.provider,
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"is_cymbal_brand": isCymbalBrand,
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"deploymentDetails": getDeploymentDetails(r),
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"deploymentDetails": deploymentDetailsMap,
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}); err != nil {
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log.Error(err)
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}
@@ -201,7 +200,7 @@ func (fe *frontendServer) productHandler(w http.ResponseWriter, r *http.Request)
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"platform_css": plat.css,
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"platform_name": plat.provider,
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"is_cymbal_brand": isCymbalBrand,
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"deploymentDetails": getDeploymentDetails(r),
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"deploymentDetails": deploymentDetailsMap,
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}); err != nil {
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log.Println(err)
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}
@@ -313,7 +312,7 @@ func (fe *frontendServer) viewCartHandler(w http.ResponseWriter, r *http.Request
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"platform_css": plat.css,
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"platform_name": plat.provider,
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"is_cymbal_brand": isCymbalBrand,
316-
"deploymentDetails": getDeploymentDetails(r),
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"deploymentDetails": deploymentDetailsMap,
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}); err != nil {
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log.Println(err)
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}
@@ -386,7 +385,7 @@ func (fe *frontendServer) placeOrderHandler(w http.ResponseWriter, r *http.Reque
386385
"platform_css": plat.css,
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"platform_name": plat.provider,
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"is_cymbal_brand": isCymbalBrand,
389-
"deploymentDetails": getDeploymentDetails(r),
388+
"deploymentDetails": deploymentDetailsMap,
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}); err != nil {
391390
log.Println(err)
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}
@@ -448,7 +447,7 @@ func renderHTTPError(log logrus.FieldLogger, r *http.Request, w http.ResponseWri
448447
"error": errMsg,
449448
"status_code": code,
450449
"status": http.StatusText(code),
451-
"deploymentDetails": getDeploymentDetails(r),
450+
"deploymentDetails": deploymentDetailsMap,
452451
}); templateErr != nil {
453452
log.Println(templateErr)
454453
}
@@ -517,36 +516,3 @@ func stringinSlice(slice []string, val string) bool {
517516
}
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return false
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}
520-
521-
func getDeploymentDetails(httpRequest *http.Request) map[string]string {
522-
var deploymentDetailsMap = make(map[string]string)
523-
var metaServerClient = metadata.NewClient(&http.Client{})
524-
var log = httpRequest.Context().Value(ctxKeyLog{}).(logrus.FieldLogger)
525-
526-
podHostname, err := os.Hostname()
527-
if err != nil {
528-
log.Error("Failed to fetch the hostname for the Pod", err)
529-
}
530-
531-
podCluster, err := metaServerClient.InstanceAttributeValue("cluster-name")
532-
if err != nil {
533-
log.Error("Failed to fetch the name of the cluster in which the pod is running", err)
534-
}
535-
536-
podZone, err := metaServerClient.Zone()
537-
if err != nil {
538-
log.Error("Failed to fetch the Zone of the node where the pod is scheduled", err)
539-
}
540-
541-
deploymentDetailsMap["HOSTNAME"] = podHostname
542-
deploymentDetailsMap["CLUSTERNAME"] = podCluster
543-
deploymentDetailsMap["ZONE"] = podZone
544-
545-
log.WithFields(logrus.Fields{
546-
"cluster": podCluster,
547-
"zone": podZone,
548-
"hostname": podHostname,
549-
}).Debug("Fetched pod details")
550-
551-
return deploymentDetailsMap
552-
}

‎src/frontend/templates/footer.html‎

Lines changed: 12 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -29,9 +29,18 @@
2929
<br/>
3030
<small>
3131
{{ if $.deploymentDetails }}
32-
<b>Cluster: </b>{{index .deploymentDetails "CLUSTERNAME" }}<br/>
33-
<b>Zone: </b>{{index .deploymentDetails "ZONE" }}<br/>
34-
<b>Pod: </b>{{index .deploymentDetails "HOSTNAME" }}
32+
{{ if index .deploymentDetails "CLUSTERNAME" }}
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<b>Cluster: </b>{{ index .deploymentDetails "CLUSTERNAME" }}<br/>
34+
{{ end }}
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{{ if index .deploymentDetails "ZONE" }}
36+
<b>Zone: </b>{{ index .deploymentDetails "ZONE" }}<br/>
37+
{{ end }}
38+
{{ if index .deploymentDetails "HOSTNAME" }}
39+
<b>Pod: </b>{{ index .deploymentDetails "HOSTNAME" }}
40+
{{ end }}
41+
{{ else }}
42+
Deployment details are still loading.
43+
Try refreshing this page.
3544
{{ end }}
3645
</small>
3746
</p>

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