OSX Docker customization on start up

This image and docker-compose file creates a container that will adds files to /etc and certificates to your native Docker for Mac instance.

I have created this repository because unless Docker for Mac is stable version, you can change files inside the Docker engine but those changes will not persist after restarting your Docker engine. So, this is the way I found to "persist" those changes after restarting the Docker engine.

How it works

• First, an image with the files and certificates you want to persist in your Docker engine will be created.
• Runing docker-compose a new container will be created form the image created before.
• Every time the container is run, the changes will be applied to the Docker engine files.
• The container will be set to restart always. So, everytime you restart your Docker engine, the container will be run automatically and the changes will be applied to the files.

Usage

Clone the repository

git clone https://github.com/aferrandini/DockerForMacCustomizer.git

Adding certificates

To add some certificates to your Docker instance, just add your certificates to the build/certificates folder as follows:

.
└── build
    └── certificates
        ├── hostname_1:port
        |   └── ca-certificates.crt
        └── hostname_2:port
            └── ca-certificates.crt

Customizing /etc files

To customize /etc files you have to create the file inside build/etc folder and the content will be attached to the file. If the file does not exists, the script will create it.

.
└── build
    └── etc
        ├── my-file.txt
        └── hosts

In this example, the container will attach the content of your build/etc/hosts file to the Docker machine /etc/hosts file, and will create a new file at /etc/my-file.txt with the content of your build/etc/my-file.txt.

Applaing the changes to Docker Engine

Once you have create the files inside the folder structure, you have to run build the image and run a container. This will be done with docker-compose. You have to run this command:

docker-compose build && docker-compose up -d

This command will build the image and run a container that should be running forever in your Docker for Mac instance.

After restarting Docker service, you will see the container running and your files updated inside your Docker engine.

Next steps

For the next release, I want to create an image and use a volume to attach the files and the certificates, instead of building the image with docker-compose.

Colaborating

Please, feel free to colaborate and make any sugestions about this repository and how this problem is solved.