util: enable golang profiling

Add support for golang profiling.
Standard tools like go tool pprof and curl
work. example:
$ go tool pprof http://localhost:8080/debug/pprof/profile
$ go tool pprof http://localhost:8080/debug/pprof/heap
$ curl http://localhost:8080/debug/pprof/heap?debug=1

https://golang.org/pkg/net/http/pprof/ contains
more details about the pprof interface.

Fixes: #1699

Signed-off-by: Yati Padia <ypadia@redhat.com>

charts/ceph-csi-cephfs/templates/nodeplugin-daemonset.yaml

@@ -75,6 +75,9 @@ spec:
             - "--drivername=$(DRIVER_NAME)"
 {{- if .Values.topology.enabled }}
             - "--domainlabels={{ .Values.topology.domainLabels | join "," }}"
+{{- end }}
+{{- if .Values.nodeplugin.profiling.enabled }}
+            - "--enableprofiling={{ .Values.nodeplugin.profiling.enabled }}"
 {{- end }}
           env:
             - name: POD_IP

charts/ceph-csi-cephfs/templates/provisioner-deployment.yaml

@@ -136,6 +136,9 @@ spec:
             - "--endpoint=$(CSI_ENDPOINT)"
             - "--v={{ .Values.logLevel }}"
             - "--drivername=$(DRIVER_NAME)"
+{{- if .Values.provisioner.profiling.enabled }}
+            - "--enableprofiling={{ .Values.provisioner.profiling.enabled }}"
+{{- end }}
           env:
             - name: POD_IP
               valueFrom:

charts/ceph-csi-cephfs/values.yaml

@@ -74,6 +74,9 @@ nodeplugin:
       loadBalancerIP: ""
       loadBalancerSourceRanges: []
 
+  profiling:
+    enabled: false
+
   registrar:
     image:
       repository: k8s.gcr.io/sig-storage/csi-node-driver-registrar
@@ -144,6 +147,9 @@ provisioner:
       loadBalancerIP: ""
       loadBalancerSourceRanges: []
 
+  profiling:
+    enabled: false
+
   provisioner:
     image:
       repository: k8s.gcr.io/sig-storage/csi-provisioner

charts/ceph-csi-rbd/templates/nodeplugin-daemonset.yaml

@@ -73,6 +73,9 @@ spec:
             - "--drivername=$(DRIVER_NAME)"
 {{- if .Values.topology.enabled }}
             - "--domainlabels={{ .Values.topology.domainLabels | join "," }}"
+{{- end }}
+{{- if .Values.nodeplugin.profiling.enabled }}
+            - "--enableprofiling={{ .Values.nodeplugin.profiling.enabled }}"
 {{- end }}
           env:
             - name: POD_IP

charts/ceph-csi-rbd/templates/provisioner-deployment.yaml

@@ -142,6 +142,9 @@ spec:
             {{- if .Values.provisioner.skipForceFlatten }}
             - "--skipforceflatten={{ .Values.provisioner.skipForceFlatten }}"
             {{- end }}
+            {{- if .Values.provisioner.profiling.enabled }}
+            - "--enableprofiling={{ .Values.provisioner.profiling.enabled }}"
+            {{- end }}
           env:
             - name: POD_IP
               valueFrom:

charts/ceph-csi-rbd/values.yaml

@@ -85,6 +85,10 @@ nodeplugin:
       loadBalancerIP: ""
       loadBalancerSourceRanges: []
 
+  profiling:
+    # enable profiling to check for memory leaks
+    enabled: false
+
   registrar:
     image:
       repository: k8s.gcr.io/sig-storage/csi-node-driver-registrar
@@ -169,6 +173,10 @@ provisioner:
       loadBalancerIP: ""
       loadBalancerSourceRanges: []
 
+  profiling:
+    # enable profiling to check for memory leaks
+    enabled: false
+
   provisioner:
     image:
       repository: k8s.gcr.io/sig-storage/csi-provisioner