How to use Nexus docker registry

Configure Nexus Docker registry

Open your Nexus tab in your browser log in in Nexus Go to the toothed wheel, and select Create repository Choose docker registry hosted

Enter name myregistry Set HTTP port to 30999
allow anonymous docker pull
Enable Docker v1 API
Tick Allow anonymous docker pull Deployment policy to Allow redeploy Hit Create repository Go to Security -> Realms
Set active Docker Bearer Token Realm

Hit Save

Change docker daemon config

Add the following lines in /etc/docker/daemon.json

{
  
        "insecure-registries":["nexus:30999"]
}

Add nexus entry in /etc/hosts as the example below On your local host Add the nexus container private address ip
Check portainer

127.0.0.1 localhost nexus  # add nexus after localhost
51.68.28.209 jenkins jenkins external.local
172.16.0.11 internal.local

Sanity Tests

nc -vz nexus 30999 # should be succeeded

cd 
cd jenkins-pic 
source venv/bin/activate
docker-compose down 
 sudo systemctl restart docker
docker-compose up -d 
# wait a while
docker login -u admin -p 12345678 nexus:30999

Manage Nexus docker registry in Jenkins

Create a job petclinic-image-in-nexus
Copy from petclinic-docker-run
In bindings, change credentials to nexuslogin

docker login -u $USERNAME -p $PASSWORD nexus:30999
RS=`docker images --all   --filter=reference='robotshop/*:ccbb706a189c'  --format "{{.Repository}}"`
docker tag <your_dockerhub_account>/petclinic nexus:30999/petclinic
docker push nexus:30999/petclinic

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