How do you repeat an Ansible task?

How do you repeat an Ansible task?

How to repeat tasks using ansible loop with examples

1. Iterating over a simple loop.
2. Register output to a variable.
3. Iterating over list of hashes.
4. Iterate over dictionary.
5. What’s Next.

What is loop control in Ansible?

Ansible loop is used to repeat any task or a part of code multiple times in an Ansible-playbook. It includes the creation of multiple users using the user module, installing multiple packages using apt or yum module or changing permissions on several files or folders using the file module.

Does Ansible do until loops?

To use this loop in task you essentially need to add 3 arguments to your task arguments: until – condition that must be met for loop to stop. That is Ansible will continue executing the task until expression used here evaluates to true. retry – specifies how many times we want to run the task before Ansible gives up.

What is With_item in Ansible?

What is Ansible with_items? The Ansible with_items is a handy plugin to perform loop operations in a playbook. The plugin accepts items and then passes them to the calling module. For example, you can pass a list of packages to install and then give each item in the list to the install task.

How do you use nested loops in Ansible?

Ansible’s syntax also supports the idea of nested looping. Nested loops in many ways are similar in nature to a set of arrays that would be iterated over using the with_nested operator. Nested loops provide us with a succinct way of iterating over multiple lists within a single task.

Which loop can be used to iterate over files in a directory Ansible?

Looping over Filetrees. with_filetree recursively matches all files in a directory tree, enabling you to template a complete tree of files on a target system while retaining permissions and ownership.

Where can we use loops in Ansible?

Examples of commonly-used loops include changing ownership on several files and/or directories with the file module, creating multiple users with the user module, and repeating a polling step until a certain result is reached.

What is With_dict in Ansible?

with_dict: – “{{ zones_hash }}” declares a list with a dict as the first index, and Ansible rightfully complains since it expects a dict. The solution kfreezy mentioned works since it actually gives a dictionary to with_dict and not a list: with_dict: “{{ zones_hash }}” Follow this answer to receive notifications.

What does Set_fact do in Ansible?

This module allows setting new variables. Variables are set on a host-by-host basis just like facts discovered by the setup module. These variables will be available to subsequent plays during an ansible-playbook run. Set cacheable to yes to save variables across executions using a fact cache.

How do you write a nested loop?

Nested loop means a loop statement inside another loop statement. That is why nested loops are also called as “loop inside loop“. Syntax for Nested Do-While loop: do{ do{ // statement of inside loop }while(condition); // statement of outer loop }while(condition);

What is async and poll in ansible?

If you want to run multiple tasks in a playbook concurrently, use async with poll set to 0. When you set poll: 0 , Ansible starts the task and immediately moves on to the next task without waiting for a result. Each async task runs until it either completes, fails or times out (runs longer than its async value).

What is slurp Ansible?

slurp – Slurps a file from remote nodes This module works like fetch. It is used for fetching a base64- encoded blob containing the data in a remote file. This module is also supported for Windows targets.

What is Run_once in Ansible?

6 months ago. by John Otieno. The Ansible run_once parameter detours the lost loop and forces a specific task to be executed on the first host in the batch. The result can then be applied to other active hosts in the playbook.

Are nested loops bad?

Nested loops are frequently (but not always) bad practice, because they’re frequently (but not always) overkill for what you’re trying to do. In many cases, there’s a much faster and less wasteful way to accomplish the goal you’re trying to achieve.

Is it good to use nested for loops?

Nested loops are extraordinarily useful when you have two different arrays that need to be looped through the same function, looping different arrays into properties of various objects, when you need a “2D” array (x and y-axis), and the list goes on.

Is Ansible synchronous?

By default Ansible runs tasks synchronously, holding the connection to the remote node open until the action is completed. This means within a playbook, each task blocks the next task by default, meaning subsequent tasks will not run until the current task completes.

How do you handle long running tasks in Ansible?

By default, for Ansible tasks, the connections stay open until the task is done on each node, but this may not be the desired behavior for some functions as sometimes the task can take more time than SSH timeouts. You can run such long running tasks in the background and check their status later.

What is Local_action in Ansible?

In an Ansible playbook, when local_action is used, Ansible will run the module work mentioned under it on the controller node. Mostly modules used with local_action are shell and command. As you can do almost all the tasks using these modules on the controller node.

What is Delegate_to in Ansible?

Ansible delegate_to property or the keyword specified in the ansible-playbook is used to provide the control to run the task locally or to the other different hosts rather than running on the remote hosts specified on the inventory server list, and this can be the few tasks or running the entire play-book locally and …

What can I use instead of a nested loop?

You can just simply use normal functions like this. Of course you CAN use recursion as others have mentioned, but there’s no need of using recursion unless there’s need for it. Moreover, using recursion in place of nested looping would become quite complex and you would have to think about it.