ansible append string to items in list
or filter to manipulate an unsorted list of VLAN integers into a sorted string list of Data manipulation in Ansible: string transformation. For example, to join 4 values in the previous example, you can do the following. ANSIBLE VERSION. Let’s say you have an external dict (hostvars) where you take one element by a key (f.e. https://stackoverflow.com/questions/29399581/using-set-facts-and-with-i…, In reply to what version of ansible do by Robert. Let’s assume we want to filter the interfaces list to include only “eth” or “wlan” types of interfaces. Yep this is the way to go saves you relying on declaring an empty list elsewhere. Example. Joining multiple strings in Ansible. As we use with_items, this is done for every dictionary in the mounts list. Contribute to betrcode/ansible-append-list development by creating an account on GitHub. Virtualization and Containerization Guides, Controlling how Ansible behaves: precedence rules. Here my answer. Ansible dictionaries example. ACTUAL RESULTS // but only displayed the finally appended value As you can find here in Jinja2 docs, we can use the “select” filter to filter the list. This element is a list. Unfortunately, I'm now not able to remember which project that was, nor how I fixed it, but I know I spent a couple hours trying to vary what syntax I was using to set the variable initially, then concatenate values inside the dict using set_fact. hostvars[host].foobar). When I run it where two indexes have the same name but different values, it only adds the first one it encounters to the collection. This method only seems to work when all entries are unique. Despite that, we recommend you use the FQCN for easy linking to the module documentation and to avoid conflicting with other collections that may have the same module name. Star 25 Fork 1 Star Code Revisions 11 Stars 25 Forks 1. Method #1 : Using + operator + list conversion In this method, we first convert the string into a list and then perform the task of append using + operator. Loops¶. I want to reuse those mountdirs during the creation of a Jinja2 template for Borg Backup. Fortunately, there are many looping options to choose from. Add command line arguments. Uncomment a line. item 2 name - bar, item 2 value - x ansible shell expect example, Ansible AD HOC Command Examples - Ansible Cheat Sheet. As we also need our original data fields, and not just age and password, we combine item and ansible_facts.tmp_user in a similar way. Last updated on Mar 11, 2021. Append a string to a line (before/after). Other useful references and examples on Ansible Dictionaries. installations. Start of the file. This question may look strange as something like this is not implemented in real life. You can also use the + operator to combine lists, or use slices to insert items at specific positions.. Add an item to the end: append() Combine lists: extend(), + operator Insert an item at specified index: insert() Add another list or tuple at specified index: slice Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. I have tried to make it very general. We have a list of numbers or strings, and we want to append items to a list. When I used set_fact, the list contained only one ec2 instance. Specifically, I'm trying to register a list of instance IDs and their forwarding ports to an AWS Application ELB. Despite that, we recommend you use the FQCN for easy linking to the module GitHub Gist: instantly share code, notes, and snippets. 1. Recently on #ansible in IRC, a person queried how to modify all items in a list. Viewed 14k times 1. Nice example in a exemplary way , thanks to Jeff adoring ansible . The length of the list increases by one. In computer programming, this is called a loop. Our playbook after modifications: Let’s say you want to remove from your dictionary (object) all elements with value of empty string.. “How to filter a dictionary in Ansible” is published by George Shuklin in OpsOps. Active 1 year, 7 months ago. Really awesome, nice way to use set_fact module. It will return a string which is the result of concatenating all the string in the list. Here's the playbook I used: Before building the ec2_security_group_names list, I made sure to set it as an empty list in vars (ec2_security_group_names: []). Ansible: Broke string to list. ansible 2.5.1 config file = /etc/ansible/ansible.cfg configured module search path = [u'/home/ijiffry/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python2.7/site-packages/ansible executable location = /usr/bin/ansible python version = 2. ansible - with_items - jinja2 append string to list Proper way to concatenate variable strings (2) As simple as joining lists in python itself. item 4 name - bar, item 4 value - z, what version of ansible do you use? You need to keep it as list and prepend (add at front) a string. - hosts: localhost. It was less than intuitive; dicts seem to behave a bit differently than arrays in this regard. Ansible ad hoc commands are one-liners designed to achieve a very specific task they are like quick snippets and your compact swiss army knife when you want to do a quick task across multiple machines. How to append or add an element to ansible dictionary. I always get only the last element of the iterated list added to the list ( created by set_fact ) as described in the OP here: Contribute to dcode/ansible-append-list development by creating an account on GitHub. I know you can do something like: - name: this is a hack shell: echo "{% originalvar.append('x') %}New value of originalvar is {{originalvar}}" but is there really no sort of meta task or helper to do this? As we also need our original data fields, and not just age and password, we combine item and ansible_facts.tmp_user in a similar way. This module is part of ansible-base and included in all Ansible installations. https://blog.crisp.se/2016/10/20/maxwenzin/how-to-append-to-lists-in-an…. In the first example, we looked at a simple standard loop where the array was a list of string values representing users to be added to the remote target. Ansible string manipulation. You can also use the + operator to combine lists, or use slices to insert items at specific positions.. Add an item to the end: append() Combine lists: extend(), + operator Insert an item at specified index: insert() Add another list or tuple at specified index: slice ansible - example of using filters to change each item in a list - 00_description. I think there's also a Jinja2 filter that can combine dicts better than using +. if you do not want flattening nor any other transformation look at the ‘list’ lookup. By passing a list, Ansible will run the task for all packages listed. Embed. # List of string listOfStrings = ['Hi' , 'hello', 'at', 'this', 'there', 'from'] Now let’s check if given list contains a string element ‘at’ , Check if element exists in list … a list of mount points: mymounts: basedir: /srv/mymounts mounts:-name: first_mount opts: defaults-name: second_mount opts: noauto,x-systemd.automount,_netdev,reconnect-name: third_mount opts: defaults. I wanted to use the jinja 'map' filter to modify each item in a string, in this simple : example, adding '.conf' to each item. Search . ---. Let’s discuss certain ways in which we can perform string append operation in list of integers. How to append to a list in Ansible. In this article we will discuss different ways to check if a given element exists in list or not. The append() method adds a single item to the existing list. Ansible find file contains string Home; Cameras; Sports; Accessories; Contact Us Embed. Note. ec2_security_group_names: "{{ ec2_security_group_names }} + {{ [item.group_name] }}" Raw. Moreover, you need to join those lists together. The Problem Ansible is a great configuration management platform with a very, very extensible language for expressing yoru infrastructure as code. How to append to a list in Ansible. Please be sure to answer the question. Mount an AWS EFS filesystem on an EC2 instance with Ansible, Highly-Available Infrastructure Provisioning and Configuration with Ansible, Changing a deeply-nested dict variable in an Ansible playbook, https://stackoverflow.com/questions/29399581/using-set-facts-and-with-i…. This is called Standard Loops. Edit an existing line. If you have a list of hashes, you can reference subkeys using things like: This is a regression since 2.4.2 where it worked. 11 Feb, 2018 in Ansible by Enis Özgen (updated on 01/01/2019) Table of Contents. Provide details and share your research! I need to do a |from_json for each, build a hash/dict with keys I care about and push it onto an array....struggling :(. documentation and to avoid conflicting with other collections that may have To begin with, we can make our Standard Loop (with_items) more powerful by passing in a list of item 1 name - foo, item 1 value - w After a line/pattern. Ask Question Asked 2 years, 10 months ago. Jinja2 provides a filter for this purpose. You can now run the playbook to create the users using the ansible-playbook command as shown below: $ ansible-playbook -i inventory.txt create_users.yaml. tasks: In Python, use list methods append(), extend(), and insert() to add items (elements) to a list or combine other lists. That way the first time the loop adds a group_name, it has something to add to (an empty list)! Either of these examples would be the equivalent of: - name: Add user testuser1 ansible.builtin.user: name: "testuser1" state: present groups: "wheel" - name: Add user testuser2 ansible.builtin.user: name: "testuser2" state: present groups: "wheel". In most cases, you can use the short module name dict even without specifying the collections: keyword. It doesn't return a new list; rather it modifies the original list. Note. halberom / 00_description. Common return values are documented here, the following are the fields unique to this lookup: © Copyright 2021 Red Hat, Inc. In most cases, you can use the short module name lineinfile even without specifying the collections: keyword. We can use variable.find for checking the contents. The map function can be used to apply int function into every element that is present as a string in the given list. STEPS TO REPRODUCE. iAugur / ansible-add-string-to-line.yml. Last active Dec 7, 2020. How to add items to ansible dictionaries and how to create List or array of Dictionaries. Also, there might be other conditions you need to satisfy like, Add multiple lines. ec2_security_group_names: "{{ ec2_security_group_names + [item.group_name] }}". In Ansible you have a list of dictionaries containing some values, e.g. This element is a list. Recently on #ansible in IRC, a person queried how to modify all items in a list. with_items: - { role_name: app_components_role, index_names: 'docker-*, logstash-*, .kibana, springxd-*', privileges: 'read, view_index_metadata' } Maybe adjust your item to look like this? Ansible isn't going to magically add them, at least not when you are j ust using 'index_names' as a string. I found that by default, it’s not as easy as you might think. list_merge. This module is part of ansible-base and included in all Ansible installations. Contribute to betrcode/ansible-append-list development by creating an account on GitHub. In reply to There was a regression in by Jeff Geerling. All content copyright Jeff Geerling. Try upgrading to the latest version. Like the previous example, we do not need any functions like combine to add a new element to list (or) array, this can be simply done with the + plus sign . Ansible Dict creation and adding elements. ... Add a comment | Your Answer Thanks for contributing an answer to Server Fault! In most cases, you can use the short module name Passing variable to Ansible; Passing list to Ansible; TLDR. The yum and apt modules use with_items to execute fewer package manager transactions. how to create dictionaries runtime in Ansible playbook. Top of page. The actual requirement had to do with having users [Alice, Bob, Carol], and needing to pass conf file names to another role in the form [Alice.conf, Bob.conf, Carol.conf]. In the following example, the task will only run when the variable test1 contains the string “World”. 3 ansible: why I cannot use {{ ansible_facts['ansible_distribution_release'] }} in playbook Before a line/pattern. What would you like to do? Where item is original list element and ansible_facts has tmp_user. Whilst the with_items style loops are very handy, and very nice to have, you will likely need something more complex as you spend more time with Ansible. Since set_fact is a module like any other, you can use a with_items loop to loop over an existing list, and pull out a value from that list to add to another list. Suppose we have a list of strings i.e. Skip to content. Ansible isn't going to magically add them, at least not when you are j ust using 'index_names' as a string. Edit an existing line. Also, there might be other conditions you need to satisfy like, Add multiple lines. example: After I upgrade ansible from 2.5.1 to 2.6.1, ec2_id list includes all ec2 instances. For example, today I needed to retrieve a list of all the AWS EC2 security groups in a region, then loop through them, building a list of all the security group names. How to merge two lists together: - debug: msg="Append list to list, or merge two lists" - name: Setup two lists to be merged set_fact: list_one: - 1 - 2 - 3 list_two: - 4 - 5 - 6 - name: Merge the two lists set_fact: lists_merged: "{{ list_one + list_two }}" - name: Demonstrate merged lists debug: var=lists_merged Last active Dec 23, 2020. You must either add a leading zero so that Ansible's YAML parser knows it is an octal number (like 0644 or 01777) or quote it (like '644' or '1777') so Ansible receives a string and can do its own conversion from string into number. Note: It does not depend on the value of the hash_behaviour setting in ansible.cfg. I've forked and updated a repo on github for a number of ways to append to lists. It modifies the behaviour of combine when the hashes to merge contain arrays/lists. And on the last step, we can get a "clean" list of users with map filter, extracting only ansible… Let us see how we can do all this with some examples. When using set_fact in a loop to append values to a list defined in group_vars/all.yml, only the last item in the loop is appended. In reply to Nice article. ansible set_fact dict. Example of Ansible Loops with_items, with_nested and with_subelements example Using Loops for multiple tasks. Good information. Thanks, this solved my (very specific) problem after 3 days of searching! when the value of item.group_name has special characters such as ' or newline. I have this playbook that looks at the windows uninstall registry key and try to get specific properties for each key. list.append(item) append() Parameters. In most cases, you can use the short module name items even without specifying the collections: keyword. Ansible default list. Append a string to a line (before/after). Other Useful Filters, To parse multi-document yaml strings, the from_yaml_all filter is provided. Regarding your method 2, it would seem viable to use "with_together", even if it isn't super-efficient (unfortunately comments can't use code tags so this will look odd): - name: Secure ssl keys file: path={{ item[0] }} mode=600 owner={{ item[1] }} with_together: - secure_ssl_keys_result.files|map(attribute='path')|list - secure_ssl_keys_result.files|map(attribute='uid')|list … it works like expected with 2.5.4. thank you! Where item is original list element and ansible_facts has tmp_user. We can also make a conditional statement based on whether the variable contains a particular string. items even without specifying the collections: keyword. This is a great example, and a good start on a problem I'm trying to solve: how to create a list of dictionaries. Filter a list in Ansible. That is great! How to append to a list in Ansible. This module is part of ansible-base and included in all Ansible installations. You need to keep it as list and prepend (add at front) a… You can pass a list directly to a parameter for some plugins. What do I need this for? We can use variable.find for checking the contents. Note that the types of items you iterate over with ‘with_items’ do not have to be simple lists of strings. this lookup returns a list of items given to it, if any of the top level items is also a list it will flatten it, but it will not recurse, this is the standard lookup used for loops in most examples, check out the ‘flattened’ lookup for recursive flattening. COMPONENT NAME. But avoid … Asking for help, clarification, or responding to other answers. Ansible when variable contains string. Add command line arguments. vars: facter_blockdevices: sda,sdb,sdc,sdd,sde,sdf. Adding strings to an array in Ansible From time to time, I need to dynamically build a list of strings (or a list of other things) using Ansible's set_fact module. From time to time, I need to dynamically build a list of strings (or a list of other things) using Ansible's set_fact module.. Syntax list.append(item) The single parameter item is the item to be added at the end of the list. use just “+” operator to combine two lists into one, like: " { { ansible_interfaces + [\"VETH-1\", \"VETH-2\"] }}" check here for more advanced example: Advanced list operations in Ansible. Star 11 Fork 4 Star Code Revisions 2 Stars 11 Forks 4. Skip to content. How do I create enhanced sub-lists from existing lists and another variable with Ansible? From time to time, I need to dynamically build a list of strings (or a list of other things) using Ansible's set_fact module. Passing extra variables to ansible as list or dictionary to from cli. I'm using YAML syntax rather than the JSON syntax to create the list of dicts. Ansible: Broke string to list. Ansible default list. EXPECTED RESULTS. Is there any better way to append to a list or add a key to a dictionary in Ansible than (ab)using a jina2 template expression? How to append to a list in Ansible. I think with by Avaz. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. Despite that, we recommend you use the FQCN for easy linking to the module documentation and to avoid conflicting with other collections that may have the same module name. Despite that, we recommend you use the FQCN for easy linking to the module documentation and to avoid conflicting with other collections that may have the same module name. Despite that, we recommend you use the FQCN for easy linking to the module documentation and to avoid conflicting with other collections that may have the same module name. To make Ansible append to the list, instead of ovewriting the last value, we'll make a few modification. I was doing something like "{} + dictionary_here", but the end result was a giant string of all the dictionary data as JSON stuck together. with_items. Sometimes you want to repeat a task multiple times. I found that by default, it’s not as easy as you might think. Append element at the end of the list The result would be something like: "ec2_security_group_names": "[] + [ 'group's name' ] + [ 'group2' ] + [ 'group3' ]", To avoid this we can use either What would you like to do? Extract a single item from a list using regex in Ansible. Since set_fact is a module like any other, you can use a with_items loop to loop over an existing list, and pull out a value from that list to add to another list. Thanks. For example, to join 4 values in the previous example, you can do the following. I basically want to run this play and see all installed software on a server, just getting DisplayName, DisplayVersion etc... At times the properties dict will be empty {} but it should just return {} when it is. This module is part of ansible-base and included in all Ansible Live Demo ansible - example of using filters to change each item in a list - 00_description. In reply to This is a great example, and by Curtis O. I actually ran into this exact same issue when concatenating dictionaries on another project recently. How to process (or) iterate through the ansible dictionary; A real-time example of a complex Nested List and Dictionaries of Ansible We’ll use append() method in Python which adds an item to the end of the list. List can contain any type of data type. In the following example, the task will only run when the variable test1 contains the string “World”. I think it was a syntax issue, e.g.