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What is the difference between an Ansible role play and playbook?
Role is a set of tasks and additional files to configure host to serve for a certain role. Playbook is a mapping between hosts and roles.
What is the difference between play and playbook?
A Playbook is a list of plays. It can contain a single play, or many. A Play is a list of tasks and roles that should be run. A Play can also define vars that should be used for that play.
What is difference between roles and tasks in Ansible?
tl;dr A task is a single declaration (operation); a role is one of many ways for grouping tasks. A task in Ansible is a basic unit of work, a kind of counterpart to a line of code in other languages. A task is executed and has a result (ok, changed, failed).
What is Ansible playbook and roles?
In Ansible, the role is the primary mechanism for breaking a playbook into multiple files. This simplifies writing complex playbooks, and it makes them easier to reuse. The breaking of playbook allows you to logically break the playbook into reusable components.
What is the use of roles in Ansible?
They’re groupings of variables, tasks, handlers and other components within a standard file structure. These roles provide a way to break out an Ansible playbook into multiple independent files. In addition to promoting reuse, roles offer an easy way to share Ansible content among multiple users.
What are playbooks?
Playbook is a noun from North America meaning “a book containing a sports team’s strategies and plays, especially in American football”. So, this bit states who is in the incident management team, who is on call, their roles and responsibilities, locations, call out and how they will interact with other teams.
How do you write roles in Ansible?
Follow the aforementioned steps to write a Role:
- Initialise the role structure using the command: ansible-galaxy init <role-name>
- Go to role directory using: cd <role-name>
- Initialise for Git: git init.
- Do the necessary changes required to add role functionality.
- Add files to Git using the command: git add *
What is Ansible Galaxy roles?
Ansible Galaxy is a repository for Ansible Roles that are available to drop directly into your Playbooks to streamline your automation projects. Ansible automates using the SSH protocol. The control machine uses an SSH connection to communicate with its target hosts, which are typically Linux hosts.
What’s the difference between play, role and play in Ansible?
The play is the element that ties tasks to the servers where they’ll run. The key element here is the mandatory keyword hosts. This is the part of Ansible that tells which hosts are being affected and how. So, the structure and behavior is as follows: Playbook: the highest level, just a list of plays. Play: ties tasks to host lists.
When to use a role instead of a playbook?
Playbook is often used to complete simple tasks. When you would like to perform the multiple tasks, restarting services and copying files for a single job, you must consider using “roles” instead of writing the lengthy playbooks. Roles uses the known file structure to keep the various elements in different directories.
What’s the difference between task, role, play?
This is the part of Ansible that tells which hosts are being affected and how. Besides tasks, a play may have pre-tasks, post-tasks and handlers, which are all task-like, and roles. A role is a different thing, as it is not defined within a playbook. Instead, they each have their own subdirectory under the directory roles.
How is task includes included processed in Ansible 2.0?
In Ansible 2.0 there were changes on how ‘task’ includes are processed. The ‘play’ includes are still ‘static’ or unchanged. In previous versions of Ansible, all includes acted as a pre-processor statement and were read during playbook parsing time.