How to upload and download docker images using nexus registry/repository?

Question

I was able to publish a Docker image using the jenkins pipeline, but not pull the docker image from the nexus.I used kaniko to build the image.

deployment.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: test-app
  name: test-app
  namespace: jenkins
spec:
  replicas: 1
  selector:
    matchLabels:
      app: test-app
  template:
    metadata:
      labels:
        app: test-app
    spec:
      hostNetwork: false
      containers:
        - name: test-app
          image: ip_adress/demo:0.1.0
          imagePullPolicy: Always
          resources:
            limits: {}
      imagePullSecrets:
        - name: registrypullsecret

service.yml

apiVersion: v1
kind: Service
metadata:
  labels:
    app: test-app
  name: test-app-service
  namespace: jenkins
spec:
  ports:
    - nodePort: 32225
      port: 8081
      protocol: TCP
      targetPort: 8081
  selector:
    app: test-app
  type: NodePort

Jenkins pipeline main script

stage ('Build Image'){
        container('kaniko'){
                    script {
            sh '''
            /kaniko/executor --dockerfile `pwd`/Dockerfile --context `pwd` --destination="$ip_adress:8082/demo:0.1.0" --insecure --skip-tls-verify
             '''
          }

stage('Kubernetes Deployment'){
            container('kubectl'){
                 withKubeConfig([credentialsId: 'kube-config', namespace:'jenkins']){
                     sh 'kubectl get pods'
                     sh 'kubectl apply -f deployment.yml'
                     sh 'kubectl apply -f service.yml'
                 }

I've created a dockerfile of a Spring boot Java application. I've sent the image to Nexus using the Jenkins pipeline, but I can't deploy it.

kubectl get pod -n jenkins

test-app-... 0/1 ImagePullBackOff

kubectl describe pod test-app-.....

Error from server (NotFound): pods "test-app-.." not found

docker pull $ip_adress:8081/repository/docker-releases/demo:0.1.0 ```

Error response from daemon: Get "https://$ip_adress/v2/": http:server gave HTTP response to HTTPS client

ip adress: private ip address

How can I send as http?

score 0 · Answer 1 · answered Oct 11 '22 at 13:37

0

First of all try to edit /etc/containerd/config.toml and add your registry ip:port like this { "insecure-registries": ["172.16.4.93:5000"] }

if there was still a problem, add your nexus registry credential to yaml kubernetes file like link below https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/

answered Oct 11 '22 at 13:37

Amirhossein eidy

9
4

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Oct 18 '22 at 05:23

score 0 · Answer 2 · answered Dec 22 '22 at 09:08

If we want to use a private registry to pull the images in kubernetes we need to configure the registry endpoint and credentials as a secret and use it in pod deployment configuration.

Note: The secrets must have to be in the same namespace as Pod

Refer this official k8 document to know more details about configuring private registry in Kubernetes

In your case you are using secret registrypullsecret . So check the secret one more time whether it is configured properly or not. If not, try following the documentation mentioned above.

How to upload and download docker images using nexus registry/repository?

2 Answers2