Ansible core concepts
- core concepts
- complex include scenarios
- complex role scenarios
- Install Ansible on your local or on a separate server. Run
brew install ansible, then checkansible --version - Then, Design inventory file to access provisioned machines. Static or dynamic inventory is possible.
- Run,
ansible-playbook FILE_NAME.yaml -i hosts
Addition to core capabilities, below topics are critical to understand ansible.
- designing and grouping host file
- become: user delegation (sudo ..)
- localhost vs host : task delegation (where the task will run)
- handling secret things w/ ansible vault
ansible-galaxy install tansudasli.dummyto get last version of the role.ansible-playbook run-role_dummy.yamlto run the role
There are 3 main steps, and some trade-offs where to use Ansible. So you should consider some critical decisions.
- If you automate machine preparations w/ Ansible, then you may be locked w/ vendor specific things (even it is Ansible thing), or maybe it is not worth it to automate at first.
- So Either do it manually or separate this part (1 and 2) from your logic.
- If you need 1000 nodes, you should consider automate 1 and 2 parts (depending on bare metal, or on cloud).
- Some parts of Ansible intersect w/ build tools. If you have gradle, you may not need create container w/ ansible.
- prepare machines -> get an IP : do it manually at the beginning.
- pre-configurations on the machines: such as user creations, passwordless-ssh etc... Use cloud-init capability. So you can also run these scripts manually in case you need it.
- core installations & configs: leverage Ansible