What is Ansible?
Automation is need of IT industry. We need to automate recurring task, and using Ansible we can automate these tasks using Ansible.
- Control Node
- Managed Node
- Ansible facts
- Ansible Vaults
- Ansible Galaxy
Control Node: – The Node from which we can run Ansible CLI tools. It’s a central Node acts as Ansible Engine, from which we can deploy Playbook, tasks using modules. It should be a Linux Machine with Python Because Ansible can be installed on Linux.
Managed Nodes: – These are also referred as hosts or the targeted devices (Windows or Linux Servers, Network appliances or any computer)
Inventory: – It contains list of managed hosts. Ansible uses Inventory files to work with managed hosts.
Modules: – Tasks get executed on managed hosts using Ansible modules.
E.g.: – yum, copy, fetch, ping, etc.
Plugins: – It’s a piece of code which expands Ansible core functionality.
E.g.: – Connection plugins, Filter plugins and Callback plugins, etc
Collections: – It’s a format through which ansible content gets distributed. It may be a playbook, role, mode or plugin.
AAP: – AAP stands for Ansible Automation Platform, which contains enterprise-level features. And it integrates the Ansible ecosystem: ansible-core, awx, galaxy, and so on.
Playbook: – Playbook contains plays written in YAML. A single playbook may contain multiple tasks.
Plays: – Plays contain variables, roles and an ordered list of tasks (which should run repeatedly)
We can map managed nodes (hosts) to tasks.
Roles: – Using Role we can group multiple tasks together.
Eg: – We can create one role for multiple tasks, one for multiple variables, one for multiple handlers, etc
Tasks: – It specifies which action to carry on managed hosts. The task gets executed using the ad-hoc command.
Handlers: – These are the tasks which runs when notified.
Variables: – We can assign value to it. Variable name should contain letter, number and underscore. But should start with letter.
Ansible Facts: – We used facts to get data from Managed nodes.
Two types of facts: –
Ansible Vaults: – Ansible Vault is a secure store for storing passwords and encrypted files
Ansible Galaxy: – It’s an online repository for Ansible roles.
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