How to run ansible playbooks on Docker.

Two possible ways:

• WSL2 - copy: Only for WSL2 use.
• Linux - Volumes: A much safer way.

WhatToDo.txt files have simple instructions and you can find more detailed instructions in readme.md -files. Quickstart (below) has main commands.

Quickstart

WSL2 version, done using COPY in Dockerfile:

Used COPY because apparently using volumes to send SSH-keys doesn't work in WSL2.

I did this with W10 computer that has WSL2 and Ubuntu 18.04 distro.
My host-machine is CentOS 7.

Main commands:

Creates ssh-keys:

sudo ssh-keygen 

Build Docker Image:

sudo docker build -t ansible3:3.44 .

Runs the sshkey.yml -playbook that sends SSH-keys to hosts:

sudo docker run --rm -it -v /home/ansible/docker:/ansible/playbooks ansible3:3.44 --private-key=/home/ansible/.ssh/id_rsa sshkey.yml -Kk

Runs testUpdate.yml -playbook, this si how you run playbooks:

sudo docker run --rm -it -v /home/ansible/docker:/ansible/playbooks ansible3:3.44 --private-key=/home/ansible/.ssh/id_rsa testiUpdate.yml

If build command doesn't work in WSL2:

Solution is:
In ~/.docker/config.json change credsStore to credStore

Linux version using volumes (doesn't work on wsl2)

I used volumes here to send ssh-keys and hosts-file to container on run. Much better way than previous COPY one, bc of safety.

I did this with CentOS8 Stream virtual machine. Host was CentOS 7 virtual machine.

Main commands:

Creates ssh-keys:

sudo ssh-keygen 

Chown ssh-keys:

sudo chown 1000 id_rsa
sudo chown 1000 id_rsa.pub 

Build Docker Image:

sudo docker build -t ansible1:1.0 .

Runs the sshkey.yml -playbook that sends SSH-keys to hosts:

sudo docker run --rm -it -v /home/ansible/docker/id_rsa:/home/ansible/.ssh/id_rsa -v /home/ansible/docker/id_rsa.pub:/home/ansible/.ssh/id_rsa.pub -v /home/ansible/docker/hosts:/etc/ansible/hosts -v /home/ansible/docker:/ansible/playbooks ansible1:1.0 --private-key=/home/ansible/docker/.ssh/id_rsa sshkey.yml -Kk

Runs testUpdate.yml -playbook, this is how you run playbooks:

 sudo docker run --rm -it -v /home/ansible/docker/id_rsa:/home/ansible/.ssh/id_rsa -v /home/ansible/docker/id_rsa.pub:/home/ansible/.ssh/id_rsa.pub -v /home/ansible/docker/hosts:/etc/ansible/hosts -v /home/ansible/docker:/ansible/playbooks ansible1:1.0 --private-key=/home/ansible/docker/.ssh/id_rsa testiupdate.yml