I have below YAML file used in Kubernetes of Windows Docker Desktop.
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: thoughts-backend
labels:
app: thoughts-backend
namespace: example
spec:
replicas: 1
selector:
matchLabels:
app: thoughts-backend
template:
metadata:
labels:
app: thoughts-backend
spec:
containers:
- name: thoughts-backend-service
image: thoughts_server:latest
imagePullPolicy: Never
ports:
- containerPort: 8000
env:
- name: DATABASE_ENGINE
value: POSTGRESQL
- name: POSTGRES_DB
value: thoughts
- name: POSTGRES_USER
value: postgres
- name: POSTGRES_PASSWORD
value: somepassword
- name: POSTGRES_PORT
value: "5432"
- name: POSTGRES_HOST
value: "127.0.0.1"
- name: thoughts-backend-db
image: thoughts_backend_db:latest
imagePullPolicy: Never
---
apiVersion: v1
kind: Service
metadata:
namespace: example
labels:
app: thoughts-service
name: thoughts-service
spec:
ports:
- name: thoughts-backend
port: 80
targetPort: 8000
selector:
app: thoughts-backend
type: NodePort
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: thoughts-backend-ingress
namespace: example
spec:
rules:
- host: thoughts.example.local
http:
paths:
- backend:
serviceName: thoughts-service
servicePort: 80
path: /
When I run kubectl get pods -n example I get ErrImageNeverPull error.
> kubectl get pods -n example
NAME READY STATUS RESTARTS AGE
thoughts-backend-55c686f6f5-dhjj2 0/2 ErrImageNeverPull 0 3h43m
>
Following is the output of describe command.
> kubectl describe pod thoughts-backend-55c686f6f5-dhjj2 -n example
Name: thoughts-backend-55c686f6f5-dhjj2
Namespace: example
Priority: 0
Node: docker-desktop/192.168.65.4
Start Time: Sat, 27 Nov 2021 16:31:29 +0530
Labels: app=thoughts-backend
pod-template-hash=55c686f6f5
Annotations: <none>
Status: Pending
IP: 10.1.0.23
IPs:
IP: 10.1.0.23
Controlled By: ReplicaSet/thoughts-backend-55c686f6f5
Containers:
thoughts-backend-service:
Container ID:
Image: thoughts_server:latest
Image ID:
Port: 8000/TCP
Host Port: 0/TCP
State: Waiting
Reason: ErrImageNeverPull
Ready: False
Restart Count: 0
Environment:
DATABASE_ENGINE: POSTGRESQL
POSTGRES_DB: thoughts
POSTGRES_USER: postgres
POSTGRES_PASSWORD: somepassword
POSTGRES_PORT: 5432
POSTGRES_HOST: 127.0.0.1
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-tqssf (ro)
thoughts-backend-db:
Container ID:
Image: thoughts_backend_db:latest
Image ID:
Port: <none>
Host Port: <none>
State: Waiting
Reason: ErrImageNeverPull
Ready: False
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-tqssf (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-tqssf:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning ErrImageNeverPull 3m4s (x326 over 4h1m) kubelet Container image "thoughts_server:latest" is not present with pull policy of Never
The Kubernetes version is
> kubectl.exe version
Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.5", GitCommit:"aea7bbadd2fc0cd689de94a54e5b7b758869d691", GitTreeState:"clean", BuildDate:"2021-09-15T21:10:45Z", GoVersion:"go1.16.8", Compiler:"gc", Platform:"windows/amd64"}
Server Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.5", GitCommit:"aea7bbadd2fc0cd689de94a54e5b7b758869d691", GitTreeState:"clean", BuildDate:"2021-09-15T21:04:16Z", GoVersion:"go1.16.8", Compiler:"gc", Platform:"linux/amd64"}
I am not sure what is this error and how to fix this in Docker-Desktop? Can anyone help me? I run Kubernetes in Docker-desktop application on Windows.
"thoughts_server:latest" is not present with pull policy of Never
Further, added output of docker images for help in debugging.
> docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
k8s.gcr.io/ingress-nginx/controller <none> ae1a7201ec95 3 days ago 285MB
httpd latest ad17c88403e2 8 days ago 143MB
nginx latest ea335eea17ab 10 days ago 141MB
kubernetesui/dashboard v2.4.0 72f07539ffb5 6 weeks ago 221MB
k8s.gcr.io/ingress-nginx/kube-webhook-certgen <none> c41e9fcadf5a 6 weeks ago 47.7MB
docker/desktop-kubernetes kubernetes-v1.21.5-cni-v0.8.5-critools-v1.17.0-debian 967a1c03eb00 2 months ago 290MB
k8s.gcr.io/kube-apiserver v1.21.5 7b2ac941d4c3 2 months ago 126MB
k8s.gcr.io/kube-scheduler v1.21.5 8e60ea3644d6 2 months ago 50.8MB
k8s.gcr.io/kube-controller-manager v1.21.5 184ef4d127b4 2 months ago 120MB
k8s.gcr.io/kube-proxy v1.21.5 e08abd2be730 2 months ago 104MB
kubernetesui/metrics-scraper v1.0.7 7801cfc6d5c0 5 months ago 34.4MB
docker/desktop-vpnkit-controller v2.0 8c2c38aa676e 6 months ago 21MB
docker/desktop-storage-provisioner v2.0 99f89471f470 7 months ago 41.9MB
k8s.gcr.io/pause 3.4.1 0f8457a4c2ec 10 months ago 683kB
k8s.gcr.io/coredns/coredns v1.8.0 296a6d5035e2 13 months ago 42.5MB
k8s.gcr.io/etcd 3.4.13-0 0369cf4303ff 15 months ago 253MB
Further, added output of kubernetes get pod -o wide command
> kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
docker-desktop Ready control-plane,master 21h v1.21.5 192.168.65.4 <none> Docker Desktop 5.4.72-microsoft-standard-WSL2 docker://20.10.10
2
Answers
Per docs,
You use
imagePullPolicy: Neverdirective in your Deployment and when you try to deploy your manifest, kubelet fails to find required images locally.To get your local cluster to use a local image, you need to make two changes to your Kubernetes deployment configuration: