Volume is not mounted even when pvc is created - kubernetes

Question

I am using helm chart for the installation of the application, the volume is not mounted. I am doing something wrong but not sure what is it. I am new to devops
values.yaml
persistence:
enabled: true
existingClaim: grafana-persistent-storage
mountPath: "/dev/grafana/"
pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: grafana-block-pvc
spec:
accessModes:
- ReadWriteOnce
volumeMode: Block
storageClassName: grafana-persistent-storage
resources:
requests:
storage: 10Gi
storageClass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: grafana-persistent-storage
provisioner: kubernetes.io/aws-ebs
parameters:
type: gp2
iopsPerGB: "10"
reclaimPolicy: Retain
allowVolumeExpansion: true
mountOptions:
- debug
volumeBindingMode: Immediate
PVC is creaed
kubectl --kubeconfig=<configfile> get pvc -n grafana
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
grafana-block-pvc Bound pvc-6dc39e0d-471e-11ea-b432-0a505018290a 10Gi RWO grafana-persistent-storage 10m
PV created too
pvc-6dc39e0d-471e-11ea-b432-0a505018290a 10Gi RWO Retain Bound grafana/grafana-block-pvc grafana-persistent-storage 10m
Kubectl describe pod - the description of the pod created.
Name: grafana1-v1-79fb988995-lnnl6
Namespace: grafana
Priority: 0
Node: ip-10-10-108-165.ap-southeast-1.compute.internal/10.10.108.165
Start Time: Tue, 04 Feb 2020 13:15:17 +0530
Labels: app.kubernetes.io/instance=grafana1
app.kubernetes.io/name=grafana1
pod-template-hash=79fb988995
Annotations: kubernetes.io/psp: eks.privileged
sidecar.istio.io/status:
{"version":"761ebc53976754715f22fcf548f05270fb4b8db07324894aebdb31fa81d960","initContainers":["istio-init"],"containers":["istio-proxy"]...
Status: Running
IP: 10.10.127.38
IPs: <none>
Controlled By: ReplicaSet/grafana1-v1-79fb988995
Init Containers:
istio-init:
Container ID: docker://a95db52c5b45c8147fb6c6d0ce4013bef6d495752dc820565188032bc36926
Image: docker.io/istio/proxy_init:1.2.5
Image ID: docker-pullable://istio/proxy_init#sha256:c9964a8c28b85cc631bbc90390eac238c90f82c8f929495d1e9f9a9135b724
Port: <none>
Host Port: <none>
Args:
-p
15001
-u
1337
-m
REDIRECT
-i
*
-x
-b
3000
-d
15020
State: Terminated
Reason: Completed
Exit Code: 0
Started: Tue, 04 Feb 2020 13:15:18 +0530
Finished: Tue, 04 Feb 2020 13:15:19 +0530
Ready: True
Restart Count: 0
Limits:
cpu: 100m
memory: 50Mi
Requests:
cpu: 10m
memory: 10Mi
Environment: <none>
Mounts: <none>
Containers:
grafana1:
Container ID: docker://92338e43bbf69a2c0919e81f5ae16948e6f7966353a3db52274a5a14902599
Image: grafana/grafana:latest
Image ID: docker-pullable://grafana/grafana#sha256:4319ca3e5592ee408f5842ce5b5955312549d89dc1572d2543f2f6d67ca619
Port: 3000/TCP
Host Port: 0/TCP
State: Running
Started: Tue, 04 Feb 2020 13:15:23 +0530
Ready: True
Restart Count: 0
Requests:
cpu: 100m
memory: 200Mi
Environment:
GF_SECURITY_ADMIN_PASSWORD: deskera#reports
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-99rfk (ro)
istio-proxy:
Container ID: docker://21b965ec954474b3bcb941a20782f99642f002bb0e9a212aed20e19838c2f0
Image: docker.io/istio/proxyv2:1.2.5
Image ID: docker-pullable://istio/proxyv2#sha256:8f210c3d09beb6b8658a55d9ac30e25549295834a44083ed67d652ad7453e4
Port: 15090/TCP
Host Port: 0/TCP
Args:
proxy
sidecar
--domain
$(POD_NAMESPACE).svc.cluster.local
--configPath
/etc/istio/proxy
--binaryPath
/usr/local/bin/envoy
--serviceCluster
istio-proxy.grafana
--drainDuration
45s
--parentShutdownDuration
1m0s
--discoveryAddress
istio-pilot.istio-system:15010
--zipkinAddress
zipkin.istio-system:9411
--dnsRefreshRate
300s
--connectTimeout
10s
--proxyAdminPort
15000
--concurrency
2
--controlPlaneAuthPolicy
NONE
--statusPort
15020
--applicationPorts
3000
State: Running
Started: Tue, 04 Feb 2020 13:15:23 +0530
Ready: True
Restart Count: 0
Limits:
cpu: 2
memory: 1Gi
Requests:
cpu: 100m
memory: 128Mi
Readiness: http-get http://:15020/healthz/ready delay=1s timeout=1s period=2s #success=1 #failure=30
Environment:
POD_NAME: grafana1-v1-79fb988995-lnnl6 (v1:metadata.name)
POD_NAMESPACE: grafana (v1:metadata.namespace)
INSTANCE_IP: (v1:status.podIP)
ISTIO_META_POD_NAME: grafana1-v1-79fb988995-lnnl6 (v1:metadata.name)
ISTIO_META_CONFIG_NAMESPACE: grafana (v1:metadata.namespace)
ISTIO_META_INTERCEPTION_MODE: REDIRECT
ISTIO_META_INCLUDE_INBOUND_PORTS: 3000
ISTIO_METAJSON_ANNOTATIONS: {"kubernetes.io/psp":"eks.privileged"}
ISTIO_METAJSON_LABELS: {"app.kubernetes.io/instance":"grafana1","app.kubernetes.io/name":"grafana1","pod-template-hash":"79fb988995"}
Mounts:
/etc/certs/ from istio-certs (ro)
/etc/istio/proxy from istio-envoy (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-99rfk (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
default-token-99rfk:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-99rfk
Optional: false
istio-envoy:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium: Memory
SizeLimit: <unset>
istio-certs:
Type: Secret (a volume populated by a Secret)
SecretName: istio.default
Optional: true
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 13m default-scheduler Successfully assigned grafana/grafana1-v1-79fb988995-lnnl6 to ip-10-10-108-165.ap-southeast-1.compute.internal
Normal Pulled 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Container image "docker.io/istio/proxy_init:1.2.5" already present on machine
Normal Created 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Created container istio-init
Normal Started 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Started container istio-init
Normal Pulling 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Pulling image "grafana/grafana:latest"
Normal Pulled 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Successfully pulled image "grafana/grafana:latest"
Normal Created 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Created container grafana1
Normal Started 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Started container grafana1
Normal Pulled 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Container image "docker.io/istio/proxyv2:1.2.5" already present on machine
Normal Created 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Created container istio-proxy
Normal Started 13m kubelet, ip-10-10-108-165.ap-southeast-1.compute.internal Started container istio-proxy
Please refer the describe part of the pod. The volume is still not mounted even after changing the existing claim to pvc

Answer 1

persistence:
enabled: true
existingClaim: grafana-block-pvc
mountPath: "/dev/grafana/"
Claim name should be grafana-block-pvc rather than grafana-persistent-storage in your values.yaml