I try to mount a local folder as PersistentVolume and use it in one of the pods, but seems there is problem with the process and the pod stays on the status "pending".
The following is my pv yaml file:
kind: PersistentVolume
apiVersion: v1
metadata:
name: pv-web
labels:
type: local
spec:
storageClassName: mlo-web
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
local:
path: ${MLO_REPO_DIR}/web/
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- mlo-node
and pvc yaml file:
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvc-web
namespace: mlo-dev
labels:
type: local
spec:
storageClassName: mlo-web
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
and the deployment yaml file :
apiVersion: apps/v1
kind: Deployment
metadata:
name: web-deployment
namespace: mlo-dev
labels:
app: web
spec:
replicas: 1
selector:
matchLabels:
app: web
template:
metadata:
labels:
app: web
spec:
containers:
- name: web
image: xxxxxx/web:latest
ports:
- containerPort: 3000
volumeMounts:
- name: webdir
mountPath: /service
...
volumes:
- name: webdir
persistentVolumeClaim:
claimName: pvc-web
I found that the pod is alway in "pending" status:
web-deployment-d498c7f57-4cfbg 0/1 Pending 0 26m
and when I check the pod status using "kubectl describe", the following is the result:
Name: web-deployment-d498c7f57-4cfbg
Namespace: mlo-dev
Priority: 0
Node: <none>
Labels: app=web
pod-template-hash=d498c7f57
Annotations: <none>
Status: Pending
IP:
IPs: <none>
Controlled By: ReplicaSet/web-deployment-d498c7f57
Containers:
web:
Image: xxxxxx/web:latest
Port: 3000/TCP
Host Port: 0/TCP
Command:
npm
run
mlo-start
Environment:
NODE_ENV: <set to the key 'NODE_ENV' of config map 'env-config'> Optional: false
WEBPACK_DEV_SERVER: <set to the key 'webpack_dev_server' of config map 'env-config'> Optional: false
REDIS_URL_SESSION: <set to the key 'REDIS_URL' of config map 'env-config'> Optional: false
WORKSHOP_ADDRESS: <set to the key 'WORKSHOP_ADDRESS' of config map 'env-config'> Optional: false
USER_API_ADDRESS: <set to the key 'USER_API_ADDRESS' of config map 'env-config'> Optional: false
ENVCUR_API_ADDRESS: <set to the key 'ENVCUR_API_ADDRESS' of config map 'env-config'> Optional: false
WIDGETS_API_ADDRESS: <set to the key 'WIDGETS_API_ADDRESS' of config map 'env-config'> Optional: false
PROGRAM_BULL_URL: <set to the key 'REDIS_URL' of config map 'env-config'> Optional: false
PROGRAM_PUBSUB: <set to the key 'REDIS_URL' of config map 'env-config'> Optional: false
PROGRAM_API_ADDRESS: <set to the key 'PROGRAM_API_ADDRESS' of config map 'env-config'> Optional: false
MARATHON_BULL_URL: <set to the key 'REDIS_URL' of config map 'env-config'> Optional: false
MARATHON_API_ADDRESS: <set to the key 'MARATHON_API_ADDRESS' of config map 'env-config'> Optional: false
GIT_API_ADDRESS: <set to the key 'GIT_API_ADDRESS' of config map 'env-config'> Optional: false
GIT_HTTP_ADDRESS: <set to the key 'GIT_HTTP_ADDRESS' of config map 'env-config'> Optional: false
LOG_URL: <set to the key 'LOG_URL' of config map 'env-config'> Optional: false
LOGGER_PUBSUB: <set to the key 'REDIS_URL' of config map 'env-config'> Optional: false
AUTH0_CLIENT_ID: <set to the key 'AUTH0_CLIENT_ID' of config map 'env-config'> Optional: false
AUTH0_DOMAIN: <set to the key 'AUTH0_DOMAIN' of config map 'env-config'> Optional: false
AUTH0_CALLBACK_URL: <set to the key 'AUTH0_CALLBACK_URL' of config map 'env-config'> Optional: false
AUTH0_LOGOOUT_RETURN: <set to the key 'AUTH0_LOGOOUT_RETURN' of config map 'env-config'> Optional: false
AUTH0_CLIENT_SECRET: <set to the key 'auth0-client-secret' in secret 'env-secret'> Optional: false
SESSION_SECRET: <set to the key 'session-secret' in secret 'env-secret'> Optional: false
Mounts:
/service from webdir (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-w9v7j (ro)
Conditions:
Type Status
PodScheduled False
Volumes:
webdir:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: pvc-web
ReadOnly: false
default-token-w9v7j:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-w9v7j
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 30s (x2 over 30s) default-scheduler 0/1 nodes are available: 1 node(s) had volume node affinity conflict.
The error message I found is :
Warning FailedScheduling 30s (x2 over 30s) default-scheduler 0/1 nodes are available: 1 node(s) had volume node affinity conflict.
Do you know where my problem is? Many Thanks!
You doesn't seem to have a Node that match your affinity requirement.
Remove the affinity requirement on your PersistentVolume:
Remove this part:
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- mlo-node
and only use (and change local to hostPath):
kind: PersistentVolume
apiVersion: v1
metadata:
name: pv-web
labels:
type: local
spec:
storageClassName: mlo-web
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
hostPath:
path: /absolute-path/web/
This is similar to the Configure a Pod to Use a PersistentVolume for Storage example, also using Minikube.