How To SSH Into Docker Container Using Ansible

Hey guys hope you all are doing in today's article we are going to see how can we directly run ansible-playbook directly into the docker container. Isn't it interesting just think one playbook launching container for us updating inventory and when we run another playbook it will configure the container to run an apache web server.

To continue with this practical we will be needed a docker image that has ssh enabled in it you can use any but if don’t know how you can read this article

How to Make Docker Image SSH Enabled

Once you have an image with ssh enabled we are ready to write the playbook we are going to write two playbook one for launching container and updating inventory and one for configuring container

Playbook 1 => To launch container

- hosts: localhost
 tasks:
 — name: Installing Docker-py For Ansible
 block:
 — command: pip3 show docker-py
rescue:
 — pip:
 name: docker-py
 — name: Starting docker
 block:
 — service:
 name: docker
 state: started
 enabled: yes
 rescue:
 — debug:
 msg: ‘Docker service start’
- name: Stoping SELINUX
 ansible.posix.selinux:
 policy: targeted
 state: permissive
 — name: Launching A Docker Container
 community.general.docker_container:
 name: “test”
 image: adity12/ssh:latest
 state: started
 interactive: yes
 detach: yes
 tty: yes
 ports:
 — “8091:80”
 
 — name: Retrieving Docker Container IP
 community.general.docker_container_info:
 name: test
 register: x
- debug:
 var: x.container.NetworkSettings.IPAddress
- name: Updating Inventory File By Docker Container IP
 blockinfile:
 dest: “/ip.txt”
 block: |
 [docker]
 {{ x[‘container’][‘NetworkSettings’][‘IPAddress’] }} ansible_user=test ansible_ssh_pass=aditya ansible_connection=ssh

In above playbook test can be changed to any name as you like want to launch the container. An image I have used my image you can either use this or you can create your own and update in the playbook accordingly.

Image after running playbook 1

Playbook 2 => To configure container

- hosts: docker
 become: yes
 become_user: root
 become_method: sudo
 vars_prompt:
 — name: html_file
 private: no
 prompt: “enter file name”
 — name: cont
 private: no
 prompt: “enter content”
tasks:
 — name: Installing webserver
 apt:
 name: apache2
 state: present
 — name: Start serivce
 service:
 name: apache2
 state: started
 — name: create html file
 copy:
 content: “{{cont}}”
 dest: “/var/www/html/{{html_file}}.html”

The above playbook is used to configure the container here we are configuring an apache web server in a container from ansible master node when we run this playbook it will ask the name of the file and content that we want to put in the file.

NOTE:- Here our ansible controller node is the same as on which docker-engine in running

when we run playbook2

Once you are done with all these things goto your system IP/filename.html one thing to be remembered if you are checking from the system in which docker-engine running locally then ip will be docker ip but if you are using it in some other system then ip will be one of your system ip in which docker engine is running.

here I am using a virtual box inside that one OS on which docker-engine is running so my ip will be os ip on which docker running and we also have to give the port number you can use any here we have used 8091 so final format will for address will IP: PORT (Only when we are running outside the os where docker-engine is running)

Connected to docker and working good

In the above image you can, I am checking the webserver is configured properly or not from windows, and the docker engine is installed in different os in VM so 192.168.1.60 is the ip of my os in which docker engine is running and port is that we used during patting that 8091.

Guys, here we come to the end of this blog I hope you all like it and found it informative. If have any query feel free to reach me :)

Github link:-https://github.com/guptaadi123/Ansible-in-docker-image.git

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