pod has unbound immediate PersistentVolumeClaims (repeated 3 times) - kubernetes

Question

What is wrong with below.
# config for es data node
apiVersion: v1
kind: ConfigMap
metadata:
namespace: infra
name: elasticsearch-data-config
labels:
app: elasticsearch
role: data
data:
elasticsearch.yml: |-
cluster.name: ${CLUSTER_NAME}
node.name: ${NODE_NAME}
discovery.seed_hosts: ${NODE_LIST}
cluster.initial_master_nodes: ${MASTER_NODES}
network.host: 0.0.0.0
node:
master: false
data: true
ingest: false
xpack.security.enabled: true
xpack.monitoring.collection.enabled: true
---
# service for es data node
apiVersion: v1
kind: Service
metadata:
namespace: infra
name: elasticsearch-data
labels:
app: elasticsearch
role: data
spec:
ports:
- port: 9300
name: transport
selector:
app: elasticsearch
role: data
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
namespace: infra
name: elasticsearch-data
labels:
app: elasticsearch
role: data
spec:
serviceName: "elasticsearch-data"
replicas: 1
template:
metadata:
labels:
app: elasticsearch-data
role: data
spec:
containers:
- name: elasticsearch-data
image: docker.elastic.co/elasticsearch/elasticsearch:7.3.0
env:
- name: CLUSTER_NAME
value: elasticsearch
- name: NODE_NAME
value: elasticsearch-data
- name: NODE_LIST
value: elasticsearch-master,elasticsearch-data,elasticsearch-client
- name: MASTER_NODES
value: elasticsearch-master
- name: "ES_JAVA_OPTS"
value: "-Xms300m -Xmx300m"
ports:
- containerPort: 9300
name: transport
volumeMounts:
- name: config
mountPath: /usr/share/elasticsearch/config/elasticsearch.yml
readOnly: true
subPath: elasticsearch.yml
- name: elasticsearch-data-persistent-storage
mountPath: /data/db
volumes:
- name: config
configMap:
name: elasticsearch-data-config
initContainers:
- name: increase-vm-max-map
image: busybox
command: ["sysctl", "-w", "vm.max_map_count=262144"]
securityContext:
privileged: true
volumeClaimTemplates:
- metadata:
name: elasticsearch-data-persistent-storage
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
statefull output:
Name: elasticsearch-data-0
Namespace: infra
Priority: 0
Node: <none>
Labels: app=elasticsearch-data
controller-revision-hash=elasticsearch-data-76bdf989b6
role=data
statefulset.kubernetes.io/pod-name=elasticsearch-data-0
Annotations: <none>
Status: Pending
IP:
IPs: <none>
Controlled By: StatefulSet/elasticsearch-data
Init Containers:
increase-vm-max-map:
Image: busybox
Port: <none>
Host Port: <none>
Command:
sysctl
-w
vm.max_map_count=262144
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-9nhmg (ro)
Containers:
elasticsearch-data:
Image: docker.elastic.co/elasticsearch/elasticsearch:7.3.0
Port: 9300/TCP
Host Port: 0/TCP
Environment:
CLUSTER_NAME: elasticsearch
NODE_NAME: elasticsearch-data
NODE_LIST: elasticsearch-master,elasticsearch-data,elasticsearch-client
MASTER_NODES: elasticsearch-master
ES_JAVA_OPTS: -Xms300m -Xmx300m
Mounts:
/data/db from elasticsearch-data-persistent-storage (rw)
/usr/share/elasticsearch/config/elasticsearch.yml from config (ro,path="elasticsearch.yml")
/var/run/secrets/kubernetes.io/serviceaccount from default-token-9nhmg (ro)
Conditions:
Type Status
PodScheduled False
Volumes:
elasticsearch-data-persistent-storage:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: elasticsearch-data-persistent-storage-elasticsearch-data-0
ReadOnly: false
config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: elasticsearch-data-config
Optional: false
default-token-9nhmg:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-9nhmg
Optional: false
QoS Class: BestEffort
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
---- ------ ---- ---- -------
Warning FailedScheduling 46s (x4 over 3m31s) default-scheduler pod has unbound immediate PersistentVolumeClaims (repeated 3 times)
kubectl get sc
NAME PROVISIONER AGE
standard (default) kubernetes.io/gce-pd 5d19h
kubectl get pv
No resources found in infra namespace.
kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
elasticsearch-data-persistent-storage-elasticsearch-data-0 Pending gp2 8h

Answer 1

It looks like there is some issue with your PVC.
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
elasticsearch-data-persistent-storage-elasticsearch-data-0 Pending gp2 8h
As you can see your PV is also not created.I think there is an issue with your storage class.Looks like gp2 storage class is not available in your cluster.
Either run this yaml file if you are in AWS EKS
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: gp2
annotations:
storageclass.kubernetes.io/is-default-class: "true"
provisioner: kubernetes.io/aws-ebs
parameters:
type: gp2
fsType: ext4
or simply change the storage class to standard in GCP GKE

Answer 2

From the docs here
The storage for a given Pod must either be provisioned by a
PersistentVolume Provisioner based on the requested storage class, or
pre-provisioned by an admin.
There should be a StorageClass which can dynamically provision the PV and mention that storageClassName in the volumeClaimTemplates or there needs to be a PV which can satisfy the PVC.
volumeClaimTemplates:
- metadata:
name: elasticsearch-data-persistent-storage
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: "standard"
resources:
requests:
storage: 10Gi

Answer 3

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
namespace: default
name: elasticsearch-data
labels:
app: elasticsearch
role: data
spec:
serviceName: "elasticsearch-data"
replicas: 1
template:
metadata:
labels:
app: elasticsearch-data
role: data
spec:
containers:
- name: elasticsearch-data
image: docker.elastic.co/elasticsearch/elasticsearch:7.3.0
env:
- name: CLUSTER_NAME
value: elasticsearch
- name: NODE_NAME
value: elasticsearch-data
- name: NODE_LIST
value: elasticsearch-master,elasticsearch-data,elasticsearch-client
- name: MASTER_NODES
value: elasticsearch-master
- name: "ES_JAVA_OPTS"
value: "-Xms300m -Xmx300m"
ports:
- containerPort: 9300
name: transport
volumeMounts:
- name: config
mountPath: /usr/share/elasticsearch/config/elasticsearch.yml
readOnly: true
subPath: elasticsearch.yml
- name: elasticsearch-data-persistent-storage
mountPath: /data/db
volumes:
- name: config
configMap:
name: elasticsearch-data-config
initContainers:
- name: increase-vm-max-map
image: busybox
command: ["sysctl", "-w", "vm.max_map_count=262144"]
securityContext:
privileged: true
volumeClaimTemplates:
- metadata:
name: elasticsearch-data-persistent-storage
annotations:
volume.beta.kubernetes.io/storage-class: "standard"
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
---
This worked for me. Like Avinash said I simply changed the storage class to standard in GCP GKE