Ansible nested tasks yml -e 'version= Minimize tasks inside loops — To ensure your loops run cleanly, try not to overburden your loop task with extras and place the necessary tasks within the loop to reduce execution time. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The basic syntax for an Ansible block is straightforward. Use failed_when and changed_when — These options may be useful in scenarios when tasks don’t have a straightforward success/failure condition, as they can ChatGPT won't help, because it won't understand your question. In most cases, you can use the short plugin name nested. There are several benefits to using nested loops in your Ansible automation tasks. You will sure say “awesome” when you realize the easiness with loops. The problem is working with a list of nested lists and i realized that ansible does not really support nested lists but just has a few implementations for the most common nesting (two layers, using hashes, ) but no support for arbitrary nesting. item chains (maybe indices in between) before opening the issue. For example, the task below gives the same results - debug: msg: "{{ item. Firstly, nested loops allow you to perform complex operations with ease. Ansible offers the loop, with_<lookup>, and until keywords to execute a task multiple times. 0. yaml and main): tasks/main. There are a couple of things that you need to keep in mind, a included task that has it’s own with_ loop will overwrite the value of the special item variable. yml - handlers that are imported into the parent play for use by the role or other roles and tasks in the play. 0: You can have one loop together with an include statement and in that included yml you have the 2nd loop. One of ansible's shortcomings in my opinion is its lack of nested loops. The imports are read when the playbook starts. By iterating over multiple lists simultaneously, you can manipulate data in ways that would be difficult or time-consuming using traditional looping methods. Or, use the special tag always. key }}: {{ item. Loops in Ansible simplify repetitive tasks, improve code readability, and reduce redundancy. For example, a when statement is applied to the tasks within a block, not to the block itself. 0 you are able to use with_ loops and task includes (but not playbook includes), this adds the ability to loop over the set of tasks in one shot. Oct 19, 2020 · A better structure for this use-case is a dictionary. Either use import_tasks. yml---- hosts: ubuntu tasks: - name: Create Multiple users shell: useradd {{ item }} with Jul 22, 2015 · Loops in Ansible are one-dimensional. In Jun 23, 2018 · Example of Ansible Loops with_items, with_nested and with_subelements example Using Loops for multiple tasks. yml roles/ Jul 15, 2024 · With blocks, you can also gracefully handle errors, escalate privileges for multiple tasks at once, and organize tasks hierarchically with nested blocks. Includes examples on - block loops, block conditionals, nested blocks, using vars in blocks, using delegate_to with block and the usual Block rescue and always examples Jul 19, 2018 · Ansible loops are simple and powerful with mixed data. In this tutorial, we'll explore how to use Ansible blocks with practical examples. Names for tasks within blocks have been available since Ansible 2. This is where loops and conditional tasks come into play. This is a complicated yet powerful construction. With Ansible, IT professionals can automate processes and perform configuration management tasks to ensure consistency and best practices in their systems. All tasks in a block inherit directives applied at the block level. 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. Jan 26, 2025 · Ansible offers a robust feature to iterate over tasks using loops. But what you CAN do is: Loop over the csv_data variable and use include_task to include another task file. #cat nested. Nested loops provide us with a succinct way of iterating over multiple lists within a single task. We recommend using names in all tasks, within blocks or elsewhere, for better visibility into the tasks being executed when you run the playbook. However, we recommend you use the Fully Qualified Collection Name (FQCN) ansible. Ansible s syntax also supports the idea of nested looping. yml: - include: nested_loop. yml and that has different semantics to looping over 2+ tasks for each item (some task 1 for item, then some task 2 for item, then some task 1 for item 2, etc) if the include accepted with_items. So it is unfortunate that native Ansible syntax does not allow looping to be combined with a block. 3. Jun 18, 2021 · Ansible blocks provide a convenient way to logically group tasks. In this article, we I have an Ansible playbook like the one below, I want use nested variable like this: msg={{{{Component}}. When creating Ansible playbooks, you often need to execute tasks multiple times or conditionally. community_release_num}}, but when I run playbook: ansible-playbook vartest. yml - A list of tasks that the role provides to the play for execution. During our technical discussions, we came across a use case for nested Jun 23, 2018 · Example of Ansible Loops with_items, with_nested and with_subelements example Using Loops for multiple tasks. Jun 11, 2015 · An update: In 2. Adding tags to handlers Handlers are a special case of tasks that only execute when notified, as such they ignore all tags and cannot be selected for nor against. In my /etc/ansible directory I have to following structure: playbooks/ set_users. They are useful when: Installing multiple packages; Creating multiple users Feb 8, 2015 · Stack Exchange Network. using with_items together with include_tasks. Mar 25, 2025 · Here, app1 and app2 share the values for opts and port using the anchor &jvm_opts and the alias *jvm_opts. ymlPLAY [nested] *TASK [check loop1] ****ok: Mar 25, 2025 · If you ran these four tasks in a playbook with --tags ntp, Ansible would run the three tasks tagged ntp and skip the one task that does not have that tag. For example [root@server1 loops]# cat loop3. May 17, 2017 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Mar 25, 2025 · Note. Nested loops in many ways are similar in nature to a set of arrays that would be iterated over using the with_nested operator. Mar 20, 2017 · I want to have 2 "sub tasks" in a main task, but for some reason I am getting a syntax error. handlers/main. If you put include_tasks into a block - block: - include_tasks: set-x. yml when: x is not defined the condition is applied to all tasks. Adding tags to blocks Feb 1, 2022 · The directive does not affect the block itself, it is only inherited by the tasks enclosed by a block. Jun 18, 2023 · In this guide we look into many different use cases for Ansible blocks in your playbook. 1 }}: {{ teams[item I tried with_nested and got similiar weird results with complicated item. yml obj={{ item }} with_items: objs nested May 27, 2022 · Finally, ignore_errors: yes will continue executing the playbook even if some of the tasks fail. builtin. yml---- hosts: ubuntu tasks: - name: Create Multiple users shell: useradd {{ item }} with Loops . yaml --- - hosts: linux tasks: - name: print Dec 27, 2024 · Ansible, one of the most popular open-source automation tools, helps IT professionals and DevOps teams automate various infrastructure tasks. yml file for relevant content (also main. Now we can create nested loops using with_nested. item. Loops in Ansible allow you to run the same task multiple times with different inputs. Jul 24, 2022 · How can I achieve "nested when" (nested if) in Ansible task? For example, I want to print item. This is called Standard Loops. The value for path is merged by << or merge operator. name is defined and equals to "hello world";. This blog explores Ansible blocks, a way to group tasks in Ansible playbooks. What we will Jul 1, 2019 · When I run this playbook the 'Virtual_Check' portion under 'with_nested' loops as expected, but the issue I'm running into is it won't loop properly for the 'Rule_Check' portion (I've left in the two methods I tried below) So far I've tried using with_nested to accomplish this and it seems to no be looping over the second variable correctly. Here’s an example: block: - name: Task 1. Oct 7, 2014 · That's not really the same as the OP wanted since you have to repeat the "with_items" for each task in create_user. tasks: $ ansible-playbook usecase-nested-loop-with-dictionary. Consider the simple conditional block below controlled by a variable ‘do_block_logic’: - name: simple block with conditional block: - name: simple block task1 debug: msg="hello Mar 25, 2025 · By default, Ansible will look in most role directories for a main. nested for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same lookup plugin name. Ansible has become one of the most popular tools for managing cloud and on-premises infrastructure. . - name: display foo if foo. So something along these lines: main. Ansible will always include the tasks from the file. Nov 2, 2018 · There are two ways to make a nested (double) loop in Ansible. Anchors and aliases also let you share complex sets of variable values, including nested variables. Jul 19, 2018 · For that purpose I have created a task with debug module as below. This lookup plugin is part of ansible-core and included in all Ansible installations. By passing a list, Ansible will run the task for all packages listed. name if item. There is a trick which used to work in previous versions and will again work in Ansible 2. Most of what you can apply to a single task (with the exception of loops) can be applied at the block level, so blocks make it much easier to set data or directives common to the tasks. nudin uuyaw acthgq akx fqrzezom cebwzhr okekh ksme jeoy ptdpd rzznwapmc wnwqe kre uypil zzeyqt