Create a Docker container for your development web server in Ansible on MacOS

Overview

• I tried to create a docker container for the development environment using ansible, but the method using ansible-bender seems to require podman and buildah (Reference: Launch docker container using Ansible) , It seems that buildah for MacOS is not distributed, so I tried to find another method.
• Modules included in ansible's community.docker can't do anything you want, such as installing packages, because ansible eventually assumes an ssh connection. (You can touch the image and container from the outside, but you cannot operate the contents.)
• Therefore, instead of manipulating the docker image or container from the ansible side, when building the docker image with Dockefile, install ansible in the image and run ansible locally in that image to yourself. Make sure to install and configure the required packages. (Although the advantage of ansible's agentlessness will be lost)

environment

• macOS Catalina (10.15.1)
• Docker version 20.10.0, build 7287ab3
• ansible 2.10.3

What i did

• Copy all directories, files, and rpm packages required to execute ansible to the docker container side. To run ansible locally inside the container.

• Install python and pip.

• Install the required roles from ansible-galaxy. (community.general, community.crypto)

• Unset the start of some services (chrony, http, mackerel, sshd). This is because docker has the concept of one container and one service, and it is premised on controlling by starting and stopping the container itself, not controlling the service in the container, and it is not possible to control the start and stop of services.

• Open the required port in Dockerfile (EXPOSE 80 443) and specify it when starting the container with docker run.

• Dockerfile

  FROM centos:centos8
  
  RUN dnf clean all && rm -r /var/cache/dnf  && dnf upgrade -y && dnf update -y
  
  RUN dnf install -y sudo
  
  RUN dnf install -y python3-pip
  RUN pip3 install ansible
  RUN ansible-galaxy collection install community.crypto
  RUN ansible-galaxy collection install community.general
  
  

Copy the configuration file required to execute ansible together with the directory,

Read them all from the dev.yml file

COPY ./ ./.
RUN ansible-playbook dev.yml

EXPOSE 80 443

CMD ["/bin/bash"]
~~~

• Example of execution when creating an image and starting a container

Image construction

$ cd (directory with Dockerfile) $ docker build -t web/dev:1.0 .

Start container

$ docker run -itd -p 80:80 -p 443:443 --name test web/dev:1.0
~~~

reference

• Creating a Docker image with Ansible + Dockerfile
• Launch Docker container using Ansible (module version)

that's all.