Docker Login Error to Nexus Repository in Jenkins Pipeline: HTTP Response to HTTPS Client

Sonatype Nexus Repository
1

I am setting up a CI/CD pipeline on a Windows 10 machine using Jenkins to build a Docker image and then push it to a Nexus repository. All these services are containerized and orchestrated via Docker Compose, and I’m using Docker Desktop for managing the containers. However, during the “Push to Nexus” stage in Jenkins, I encounter an error suggesting Docker is attempting to communicate over HTTPS instead of HTTP, despite my configurations.

The error log from Jenkins is as follows:

Shell Script -- echo 'admin123' | docker login -u admin --password-stdin http://nexus:8082/repository/calculator-docker-repo/ (self time 407ms)
+ echo admin123
+ docker login -u admin --password-stdin http://nexus:8082/repository/calculator-docker-repo/
Error response from daemon: Get "https://nexus:8082/v2/": http: server gave HTTP response to HTTPS client

The relevant part of my Jenkinsfile looks like this:

stage('Push to Nexus') {
    steps {
        script {
            def nexusCreds = withCredentials([usernamePassword(credentialsId: 'Nexus_Admin_Credentials', usernameVariable: 'NEXUS_USERNAME', passwordVariable: 'NEXUS_PASSWORD')]) {
                return [username: NEXUS_USERNAME, password: NEXUS_PASSWORD]
            }
            
            sh "echo '${nexusCreds.password}' | docker login -u ${nexusCreds.username} --password-stdin http://nexus:8082/repository/calculator-docker-repo/"
            sh 'docker tag calculator_image:latest http://nexus:8082/repository/calculator-docker-repo:latest'
            sh 'docker push http://nexus:8082/repository/calculator-docker-repo:latest'
        }
    }
}

I’ve configured the Docker daemon to allow insecure registries and set up the Nexus repository to use an HTTP connector on port 8082. I expected Docker to communicate over HTTP and successfully login to the Nexus repository.

daemon.json configuration:

{
  "builder": {
    "gc": {
      "defaultKeepStorage": "20GB",
      "enabled": true
    }
  },
  "experimental": false,
  "insecure-registries": [
    "http://nexus:8082"
  ]
}

docker-compose.yml configuration for jenkins-docker service:

jenkins-docker:
    environment:
      - DOCKER_INSECURE_REGISTRY="nexus:8082"

Nexus Repository Settings:

Despite these configurations, Docker is still attempting to communicate over HTTPS. I’ve restarted Docker Desktop, reviewed all configurations, and even tried specifying the http:// scheme explicitly in the Jenkinsfile commands, but the error persists.

2

I fixed this. I had to create a daemon.json file inside the same folder as the docker-compose.yml and then recreate the images.

{
  "insecure-registries": ["nexus:8082"]
}
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