Ansible: A clienteles Infra as a code

Introduction

Laymen explanation

When you deploy your software solution and you are configuring manually, then you may forgot and need to look back what is missed. Anyway, it will take long time to configure and troubleshot is very likely. Infra as a code can help in this regard.

Technical explanation

Install in MacBook

Refer here and then set the Path via here (needed for locating the Ansible binary)

Playbook keywords

https://docs.ansible.com/ansible/latest/reference_appendices/playbooks_keywords.html#task

Troubleshhot Playbook

To enable verbose, use the -vvv command

https://stackoverflow.com/questions/42417079/how-to-debug-ansible-issues

FAQs

How to specify username in hosts file

https://stackoverflow.com/questions/34334377/how-to-specify-user-name-in-host-file-of-ansible

Sudo command on target device without password

Edit /etc/sudoers file to allow password less sudo

Refer:https://stackoverflow.com/questions/25582740/missing-sudo-password-in-ansible

Run docker-compose in task

Refer: https://docs.ansible.com/ansible/2.3/docker_service_module.html

Override docker-compose file name in task

Use files option

Refer: https://docs.ansible.com/ansible/2.6/modules/docker_service_module.html

Specify username in the playbook

Refer: https://stackoverflow.com/questions/24095807/ansible-get-the-username-from-the-command-line

Run bash command with docker-compose

Use shell option in Task

Refer: https://docs.ansible.com/ansible/latest/modules/shell_module.html

For running multiple commands, use with_items

Ref: https://docs.ansible.com/ansible/latest/plugins/lookup/items.html

Perform backup of a file in the target machine

Refer: https://docs.ansible.com/ansible/latest/modules/copy_module.html

To add timestamp in the file name

Refer: http://www.mydailytutorials.com/working-date-timestamp-ansible/

Using variables in playbook

Refer: https://www.tutorialspoint.com/ansible/ansible_variables.htm

Run multiple playbooks in sequence

Refer: https://docs.ansible.com/ansible/latest/modules/import_playbook_module.html

Pull git code with specific release version

Refer: https://www.serverlab.ca/tutorials/dev-ops/automation/how-to-use-ansible-to-deploy-your-website/

Setting file/folder owner and group owner

Use become_user

Refer: https://stackoverflow.com/questions/31640637/ansible-how-to-clone-a-repository-as-other-user

Use file for reading variables

Use vars_files

Refer: https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html

Run docker command for non-root user

Add user to docker group so that command can be run without any sudo

Ref: https://groups.google.com/forum/#!topic/ansible-project/MrfR-FfsVMg

Add user to docker group

Ref: https://docs.ansible.com/ansible/latest/modules/user_module.html

Configure environment variable

Ref: https://docs.ansible.com/ansible/latest/reference_appendices/faq.html

https://stackoverflow.com/questions/27733511/how-to-set-linux-environment-variables-with-ansible

Run specific task in a playbook

Example: % ansible-playbook deploy/deploy_neo4jdb.yml --tags "configure"

Use tag in the playbook task

Refer: https://docs.ansible.com/ansible/latest/user_guide/playbooks_tags.html

Reference

https://www.youtube.com/watch?v=4nKW2eF-nIw

https://www.serverlab.ca/tutorials/dev-ops/automation/how-to-use-ansible-to-deploy-your-website/