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private-registry.md

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Using the Private Docker Registry

DC/OS Vagrant can optionally be deployed with a private Docker registry running on the bootstrap (boot) machine. This functionality must be enabled at deploy time.

The following steps demonstrate how to enable and use the private Docker registry to deploy Nginx:

  1. Enable the private registry:

    $ export DCOS_PRIVATE_REGISTRY=true

  2. Deploy DC/OS Vagrant

  3. SSH into one of the machines:

    $ vagrant ssh boot

  4. Download nginx from Docker Hub:

    $ docker pull nginx

  5. Retag the nginx image:

    $ docker tag $(docker images | grep -m 1 ^nginx.*latest | awk -v N=3 '{print $N}') boot.dcos:5000/nginx

  6. Upload nginx to the private registry:

    $ docker push boot.dcos:5000/nginx

  7. Install the DC/OS CLI:

    The following instructions are tailored to the CentOS base image, dcos-vagrant, and dcos-cli 0.4.4. For general reference, see Installing the DC/OS CLI

    $ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py &&
    sudo python get-pip.py &&
    sudo pip install virtualenv &&
    mkdir dcos &&
    cd dcos &&
        curl -O https://downloads.dcos.io/dcos-cli/install.sh &&
        bash ./install.sh . https://m1.dcos &&
    cd .. &&
    source ./dcos/bin/env-setup

    Enter yes or no when prompted with Modify your bash profile to add DCOS to your PATH? [yes/no].

  8. Prepare a DC/OS service definition:

    

    9. 



$ tee nginx-marathon.json <<-'EOF'
{
"id": "/nginx",
"instances": 1,
"cpus": 0.5,
"mem": 128,
"container": {
"type": "DOCKER",
"docker": {
"image": "boot.dcos:5000/nginx",
"network": "HOST"
}
},
"healthChecks": [
{
"protocol": "COMMAND",
"command": { "value": "service nginx status | grep -q 'nginx is running.'"},
"gracePeriodSeconds": 300,
"intervalSeconds": 60,
"timeoutSeconds": 20,
"maxConsecutiveFailures": 3
}
],
"labels": {
"DCOS_SERVICE_NAME": "nginx",
"DCOS_SERVICE_SCHEME": "http",
"DCOS_SERVICE_PORT_INDEX": "0"
}
}
EOF
```


    

  1. 

    Create a DC/OS service:
    

    $ dcos marathon app add nginx-marathon.json
    

    If auth is enabled, authenticate as instructed by the CLI.
    

    2. 

  2. 

    Test the nginx endpoint
    

    $ curl nginx.marathon.mesos
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>
    

    3.