On this repository, we are going to discuss on how to create a docker image and container associated from latest git repo. Iam using a build server to create the image and a test server to create the container.
- yum
- pip
- service
- git
- docker_image
- docker_container
- docker_login
git clone https://github.com/Jibincl/Ansible-image-and-container-creation-using-latest-git-repo.git
cd Ansible-image-and-container-creation-using-latest-git-repo
ansible-playbook -i hosts main.yml
[build]
18.118.254.184 ansible_user="ec2-user" ansible_port=22 ansible_ssh_private_key_file="key.pem"
[test]
3.145.56.23 ansible_user="ec2-user" ansible_port=22 ansible_ssh_private_key_file="key.pem"
---
- name: "Building Docker Image in build server"
hosts: build
become: true
vars:
packages:
- git
- pip
- docker
repo_url: "https://github.com/Jibincl/git-flask-app.git"
repo_dir: "/home/ec2-user/flaskapp/"
docker_user: "jibincl"
docker_password: "dEe5SH2ujB58ezt"
image_name: "jibincl/flaskrep"
tasks:
- name: " installing packages"
yum:
name: "{{ packages }}"
state: present
- name: "Installing docker client for python"
pip:
name: docker-py
- name: "adding ec2-user to docker group"
user:
name: "ec2-user"
groups:
- docker
append: true
- name: "Restarting/enabling Docker"
service:
name: docker
state: started
enabled: true
- name: "Clonning the repo using {{ repo_url }}"
git:
repo: "{{repo_url}}"
dest: "{{ repo_dir }}"
register: git_status
- name: "Logging into the docker-hub official"
when: git_status.changed == true
docker_login:
username: "{{ docker_user }}"
password: "{{ docker_password }}"
- name: "Creating docker Image and push to hub"
when: git_status.changed == true
docker_image:
source: build
build:
path: "{{ repo_dir }}"
pull: yes
name: "{{ image_name }}"
tag: "{{ item }}"
push: true
force_tag: yes
force_source: yes
with_items:
- "{{ git_status.after }}"
- latest
- name: "Logout from hub"
when: git_status.changed == true
docker_login:
username: "{{ docker_user }}"
password: "{{ docker_password }}"
state: absent
- name: "Removing docker image from build server"
when: git_status.changed == true
docker_image:
name: "{{ image_name }}"
tag: "{{ item }}"
state: absent
with_items:
- "{{ git_status.after }}"
- latest
- name: "creating container in test server"
hosts: test
become: true
vars:
packages:
- pip
- docker
image_name: "jibincl/flaskrep"
tasks:
- name: " installing packages"
yum:
name: "{{ packages }}"
state: present
- name: "Installing docker client for python"
pip:
name: docker-py
- name: "adding ec2-user to docker group"
user:
name: "ec2-user"
groups:
- docker
append: true
- name: "Restarting/enabling Docker"
service:
name: docker
state: started
enabled: true
- name: "Pulling the docker Image from hub "
docker_image:
name: "{{image_name}}:latest"
source: pull
force_source: true
register: image_status
- name: " Creating the Container from pulled image"
when: image_status.changed == true
docker_container:
name: flaskapp
image: "{{ image_name }}:latest"
recreate: yes
pull: yes
published_ports:
- "80:5000"
Lets run the ansible playbook now,
ansible-playbook -i hosts main.yml
PLAY [Building Docker Image and container from git] *****************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
[WARNING]: Platform linux on host 18.118.254.184 is using the discovered Python interpreter at /usr/bin/python, but future installation of another Python interpreter could change this. See
https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more information.
ok: [18.118.254.184]
TASK [installing packages] ******************************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Installing docker client for python] **************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [adding ec2-user to docker group] ******************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Restarting/enabling Docker] ***********************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Clonning the repo using https://github.com/Jibincl/devops-flask.git] ******************************************************************************************************************
changed: [18.118.254.184]
TASK [Logging into the docker-hub official] *************************************************************************************************************************************************
changed: [18.118.254.184]
TASK [Creating docker Image and push to hub] ************************************************************************************************************************************************
changed: [18.118.254.184] => (item=ad2b2bbc4d13f74b58f5d90308215cd2c61d43b1)
ok: [18.118.254.184] => (item=latest)
TASK [Logout from hub] **********************************************************************************************************************************************************************
changed: [18.118.254.184]
TASK [Removing docker image from build server] **********************************************************************************************************************************************
changed: [18.118.254.184] => (item=ad2b2bbc4d13f74b58f5d90308215cd2c61d43b1)
changed: [18.118.254.184] => (item=latest)
PLAY [creating container in build server] ***************************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
[WARNING]: Platform linux on host 3.145.56.23 is using the discovered Python interpreter at /usr/bin/python, but future installation of another Python interpreter could change this. See
https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more information.
ok: [3.145.56.23]
TASK [installing packages] ******************************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Installing docker client for python] **************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [adding ec2-user to docker group] ******************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Restarting/enabling Docker] ***********************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Pulling the docker Image from hub] ****************************************************************************************************************************************************
changed: [3.145.56.23]
TASK [Creating the Container from pulled image] *********************************************************************************************************************************************
changed: [3.145.56.23]
PLAY RECAP **********************************************************************************************************************************************************************************
18.118.254.184 : ok=10 changed=5 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
3.145.56.23 : ok=7 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
After running the playbook, we could see that container is created on the client server
#docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c68a5ece9750 jibincl/flaskrep:latest "python3 app.py" 3 minutes ago Up 3 minutes 0.0.0.0:80->5000/tcp flaskapp
If we run the same whithout any changes on docker image repository, it will skip the creation and build
PLAY [Building Docker Image and container from git] *****************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
[WARNING]: Platform linux on host 18.118.254.184 is using the discovered Python interpreter at /usr/bin/python, but future installation of another Python interpreter could change this. See
https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more information.
ok: [18.118.254.184]
TASK [installing packages] ******************************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Installing docker client for python] **************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [adding ec2-user to docker group] ******************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Restarting/enabling Docker] ***********************************************************************************************************************************************************
ok: [18.118.254.184]
TASK [Clonning the repo using https://github.com/Jibincl/devops-flask.git] ******************************************************************************************************************
ok: [18.118.254.184]
TASK [Logging into the docker-hub official] *************************************************************************************************************************************************
skipping: [18.118.254.184]
TASK [Creating docker Image and push to hub] ************************************************************************************************************************************************
skipping: [18.118.254.184] => (item=0bcb64af45783c5098e61f0adf8b8b76205793c5)
skipping: [18.118.254.184] => (item=latest)
TASK [Logout from hub] **********************************************************************************************************************************************************************
skipping: [18.118.254.184]
TASK [Removing docker image from build server] **********************************************************************************************************************************************
skipping: [18.118.254.184] => (item=0bcb64af45783c5098e61f0adf8b8b76205793c5)
skipping: [18.118.254.184] => (item=latest)
PLAY [creating container in build server] ***************************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
[WARNING]: Platform linux on host 3.145.56.23 is using the discovered Python interpreter at /usr/bin/python, but future installation of another Python interpreter could change this. See
https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more information.
ok: [3.145.56.23]
TASK [installing packages] ******************************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Installing docker client for python] **************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [adding ec2-user to docker group] ******************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Restarting/enabling Docker] ***********************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Pulling the docker Image from hub] ****************************************************************************************************************************************************
ok: [3.145.56.23]
TASK [Creating the Container from pulled image] *********************************************************************************************************************************************
skipping: [3.145.56.23]
PLAY RECAP **********************************************************************************************************************************************************************************
18.118.254.184 : ok=6 changed=0 unreachable=0 failed=0 skipped=4 rescued=0 ignored=0
3.145.56.23 : ok=6 changed=0 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
In this tutorial, we discussed about creating docker image and container associated from latest git repo. If developer do any change on the dockerfile which placed on git. This will recreate the image and container without skipping.
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