Get started on your journey bycreating a free trial account. Change the way of searching for the specified pattern. You want part of that information in one file, part in another one. merged variable. You are using a variable in Ansible. "PyPI", "Python Package Index", and the blocks logos are registered trademarks of the Python Software Foundation. For example, create /etc/ansible/facts.d/preferences.fact with this content: Make sure the file is not executable as this will break the ansible.builtin.setup module. If the linting seems too annoying, it probably is! Variables related to Ansible are called magic variables. Now if you want to pass dicts or lists you can define it in a external json or yaml file If you have a long FQDN, you can use inventory_hostname_short, which contains the part up to the first period, without the rest of the domain. Ad-hoc additions to roles blurs separation (Ep. Purpose of Ansible Lookups When it comes to automation, we handle different types of data and files such as csv, txt and sometimes we might even need # something that applies to all app servers. Here, since some options are shared between users, instead of rewriting the same values, we share the common ones with the anchor, . Please make sure that make test-all exits zero. Yes. When I run my playbook, referencing both inventories, inventory does not seem to occur and I get these errors. When keyword and positional parameters are used together, positional parameters must be listed before keyword parameters: lookup ('community.general.merge_variables', term1, term2, key1=value1, key2=value2) and query ('community.general.merge_variables', term1, term2, key1=value1, key2=value2) Examples It'll be especially cumbersome when we have multilevel configuration When we want to reuse and share variables, we can leverage YAML anchors and aliases. Most projects I'm building an AMI with packer and providing it with Ansible. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. how do i use a var or vars combined to make a var name? Appending to lists or adding keys to dictionaries in Ansible just tasks executed on hosts and sprinkled with variables. Sign in First, we have the global scope where the values are set for all hosts. I want to make breaking changes to my language, what techniques exist to allow a smooth transition of the ecosystem? Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Thank you for reading, and I hope you enjoyed this Ansible Variables article as much as I did. in our project. This variable should be visible in roles. Issue Tracker more than one variable. Prior to Ansible 2.4, Is it possible to play in D-tuning (guitar) on keyboards? In order for the community to handle your issue effectively, we need a bit more information. Download the file for your platform. This works with lists, of course. 589), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Unable to run playbooks using Ansible best practices layout, Ansible - stop when host is success, exit with IP, Prevent misspelled variables passed to Ansible roles, Ansible: Backing up variable value doesn't work as expected. need to do in the .pylintrc at the root of this repository to maintain Is it possible combine remote results to local a register in Ansible In the same directory where we keep our Ansible inventory or playbook files, we can create two folders named group_vars and host_vars that would contain our variable files. that would contain our variable files. folder adjacent to the running playbook. This plugin is tested with the latest release of each minor version of Ansible >= In the same directory where we keep our. Let's say that for every variable x partial variables shall be named maintain. @govindborgaonkar: Greetings! Always give descriptive and clear names to your variables. Add files to the directory to supply your custom facts. Share combine two variables into one Issue #34484 ansible/ansible It has no effect when the merged vars are dictionaries. Submit a bug report For example, role defaults are overridden by mostly every other option. Merging variables in Ansible with roles - Server Fault If you are open to change the structure of your apps definition you can use a hash and set your hash_behavior=merge. key/value pair of all the groups in the inventory with all the hosts that belong to each group. This can be done with: Connection variables are used to define how the machine that runs Ansible connects to remote hosts during the execution of tasks and playbooks. shell> cat comb_list vm1,vm2 Share magic variable. Reddit - Dive into anything Let's say I have two inventory files. It's actually mentioned in The result is that user_1 and user_2 are added to groups devs and support, while user_3 is added only to the support group. With facts, you can use the behavior or state of one system as configuration on other systems. Variables are supposed to change the location where ansible looks for action plugins, see the Ansible Ansible: How to joint string and integer to become new string By default, you can also access some Ansible facts as top-level variables with the ansible_ prefix. They are very similar to variables in programming languages, helping you manage complex tasks more efficiently by allowing the same playbook or role to be applied across different environments, systems, or contexts without the need for hardcoding specific information. How to reclassify all contiguous pixels of the same class in a raster? Simple variables combine a variable name with a single value. Why do disk brakes generate "more stopping power" than rim brakes? Last updated on Jul 10, 2023. lookup('community.general.merge_variables'. If you can stop by there, we'd appreciate it. Variables are defined in B and I want to reference them in inventory A. It helps overcome common state management issues and adds several must-have capabilities s for infrastructure management. combinations of Ansible releases and Python versions takes a lot of time. values from later dicts replacing values from earlier dicts. role for managing certain service, common set of resources for this service To collect facts about a specific host, you can run the following command: Also, you can add the gather_facts: yes option to your playbook to ensure facts are collected after executing tasks. ." You can install the necessary packages on your remote hosts using the OS package manager. If you don't want Before running the playbook, ensure that you have added the following directory path to the ANSIBLE_LIBRARY environment variable. Jinja2, so there's no problem with dropping it into an already working project Well occasionally send you account related emails. We set values for a particular host or group of hosts using the host scope. have a set of global configuration settings like address of LDAP server, user variables. As we have previously seen, the most straightforward way is to define variables in a play with the vars section. Connect and share knowledge within a single location that is structured and easy to search. Sure. We can also register new variables in our playbooks by using the returned value of a task. Is there a proper way to merge the hash or declare an inheritance in this case? If you want to configure your database server using the value of a fact from another node, or the value of an inventory variable assigned to another node, you can use hostvars in a template or on an action line: With groups, a list of all the groups (and hosts) in the inventory, you can enumerate all hosts within a group. Does a Wand of Secrets still point to a revealed secret or sprung trap? DEFAULT_SUDO_USER(/home/ubuntu/ansible/ansible.cfg) = root In what ways was the Windows NT POSIX implementation unsuited to real use? Making statements based on opinion; back them up with references or personal experience. can hardcode additional account creation in playbook and call it a day, but it To generate dynamic custom facts using facts.d: Write and test a script to generate the JSON data you want. Ansible directory tree used to describe this solution. localhost : ok=1 changed=0 unreachable=0 failed=0. of Python and Ansible. The goal here is to get rid of task name: Combine facts and set everything under task name: Verify status but without using 'block' I was trying also with this: To check whether it is installed, run ansible-galaxy collection list. With cached facts, you have access to variables and information about all hosts even when you are only managing a small number of servers. Set cacheable to true to save variables across executions using a fact cache. I got this problem because I had a file without any content in a role at 'role/defaults/main'. In Ansible we have: Using set theory filters and combine allows to render configuration based on for custom modules; by default, this is a library directory adjacent to the are leveraged for getting system and hardware facts gathered about the current host during playbook execution. This data is often utilized for creating dynamic inventories, templating, or making decisions based on host-specific attributes. Whether to do deep (recursive) merging of dictionaries, or just merge only at top level and replace values. Please try enabling it if you encounter problems. How are the dry lake runways at Edwards AFB marked, and how are they maintained? ngnetserv@ng-netserv:/home/ubuntu/ansible$ ansible-config dump --only-changed override single dictionary key - Mxx Aug 22, 2014 at 4:08 Add a comment 6 Answers Sorted by: 105 In Ansible 2.0, there is a Jinja filter, combine, for this: - debug: msg=" { { item.key }} = { { item.value }}" with_dict: " { { my_default_values | combine (my_values) }}" Share Improve this answer Follow Released: Feb 5, 2020 An Ansible action plugin to explicitly merge inventory variables Project description ansible_merge_vars: An action plugin for Ansible An Ansible plugin to merge all variables in context with a certain suffix (lists or dicts only) and create a new variable that contains the result of this merge. You're It works similarly to ansible-merge-vars, Change the field label name in lightning-record-form component. We encourage you also to explore how Spacelifts vibrant ecosystem and excellent GitOps flow can greatly assist you in managing and orchestrating Ansible. This problem is not new, so let's review some existing solutions. Some plugins have been consistently This allows us to keep the issue tracker for bugs, pull requests, RFEs and the like. with different variables would erase prior configuration. Thanks for taking the time to open this issue. Variable names can contain only letters, numbers, and underscores and must start with a letter or underscore. Once done, you can parse that file within your playbook, or even write a parser script and execute if from the playbook. Thank you once again and we look forward to seeing you on the list or IRC. Known dependencies include: Linux Network fact gathering - Depends on the ip binary, commonly included in the iproute2 package. This is because Ansible uses Pythons ConfigParser which passes all option names through the optionxform method and this methods default implementation converts option names to lower case. How do I store ready-to-eat salad better? Apart from inventory_hostname, some other essential magic variables are: Ansible facts are leveraged for getting system and hardware facts gathered about the current host during playbook execution. Why do some fonts alternate the vertical placement of numerical glyphs in relation to baseline? When a variable of higher precedence wins, it will replace the other value. These include magic variables, connection variables, and facts. Host variables are boring, since we can't This runs a code linter, if the entry value is a list, it merges the values as lists (merge_list), if the entry value is a dict, it merges the values (recursively) as dicts (merge_dict), any other values: just replace (use last). I've heard of merging inventories so share variables across but I haven't gotten this to work. To run aginst just one combination, you can list all of the combinations They provide us with great flexibility in handling shared variables and help us reduce the repetition of data. Ansible provides many options on setting variables, and the ultimate decision on where to set them lies with us based on the scope we would like them to have. to avoid repeating ourselves as much as possible. This is not a bug, but caused by a user issue trying to combine 2 incompatible data types. Checking the Keycloak container logs, I get the following. Thanks! ansible.builtin.combine filter - combine two dictionaries To see all available qualifiers, see our documentation. Conditionals based on variables Using conditionals in loops Loading custom facts Conditionals with re-use Conditionals with imports Conditionals with includes Conditionals with roles Selecting variables, files, or templates based on facts Selecting variables files based on facts Selecting files and templates based on facts Commonly-used facts Ansible Group variables are overwritten, not merged, this is an expected behaviour, but can by circumvented by parsing group configuration files. How to explain that integral calculate areas? Variables store values for reuse inside an Ansible project. An Ansible plugin to merge all variables in context with a certain suffix (lists and variables assigned to groups. Failed to combine variables, expected dicts but got a 'dict' and a 588), How terrifying is giving a conference talk? What is the law on scanning pages from a copyright book for a friend? ansible-merge-vars PyPI For example, you can add a list of all users on a host to your facts by creating and running a script in facts.d. What is the law on scanning pages from a copyright book for a friend? Server Fault is a question and answer site for system and network administrators. The text was updated successfully, but these errors were encountered: It might help if you would include the playbook that produced the error. By participating in this project you agree to abide by its terms. How to get variables from all hosts in Ansible? This blog post deep dives into Ansible Variables, which allow us to parametrize different Ansible components. python - merging dictionaries in ansible - Stack Overflow Again, I never used that inventory plugin. Conditionals Ansible Documentation playbook_dir contains the playbook base directory. Must end with, Expected type of the merged variable (one of dict or list). Collecting the output would look something like this -. accounts etc. To put it short: Ansible playbooks are just tasks executed on hosts and sprinkled with variables. When warn and ignore are used, note that it is important to know that the variables are sorted by name before being merged. Some features may not work without JavaScript. Lets check an example that uses variables from an external file and the, Print the value of variable docker_version, Print the value of group variable http_port, Print the value of host variable app_version, ./.vagrant/machines/host1/virtualbox/private_key, ./.vagrant/machines/host2/virtualbox/private_key, The inventory file contains a group named, If we run this playbook, we notice the same value is used in both hosts for the group variable, but a different one for the host variable, Occasionally we might find it helpful to define or override variables at runtime by passing them at the command line with, task override variables from the inventory. How to vet a potential financial advisor to avoid being scammed? A powerful pattern is to combine registered variables with conditionals to create tasks that will only be executed when certain custom conditions are true. How create combined variable in Ansible from multiple hosts Ask Question Asked 2 years, 5 months ago Modified 2 years, 5 months ago Viewed 3k times 0 Scenario example: inventory.ini file: [web-servers] web1.local ansible_host=10.10.10.11 web2.local ansible_host=10.10.10.12 web3.local ansible_host=10.10.10.13 . Ansible has a strict set of rules to create valid variable names. To use it in a playbook, specify: community.general.merge_variables. Why can't Lucene search be used to power LLM applications? To learn more, check out the 44 Ansible Best Practices to Follow. The inventory file contains a group named webservers that includes our two hosts, host1 and host2: If we run this playbook, we notice the same value is used in both hosts for the group variable http_port but a different one for the host variable app_version. In your execution, you're referencing secrets.yaml last, so when aws_ec2.yaml is read, the secrets are still undefined. All file names must end with .fact. 1 possible duplicate of Ansible. Whether to remove duplicates from lists (arrays) after merging. Asking for help, clarification, or responding to other answers. So this setup: would set a merged_users var that looks like this (if it were to be declared in raw yaml): With great power comes great responsibility Let's say we've got a someenvironment group with an open_ports.yml file Jamstack is evolving toward a composable web (Ep. Why don't the first two laws of thermodynamics contradict each other? Is there a way to create fake halftone holes across the entire object that doesn't completely cuts? You can leverage. Instead let's save these macros in templates/macros.j2 file You switched accounts on another tab or window. left for user. Donate today! Learn more in our Complete YAML Guide. are used to define how the machine that runs Ansible connects to remote hosts during the execution of tasks and playbooks. py2 To reference a specific value from the list we must select the correct field. Connect and share knowledge within a single location that is structured and easy to search. Lastly, we have the play scope, where values are set for all hosts in the context of a play. Here is my secrets.yaml file: --- aws_access_key: xxxxx aws_secret_key: xxxxx aws_security_token: xxxxx When I run my playbook, referencing both inventories, inventory does not seem to occur and I get these errors. Note that the implicit localhost does not match 'all', [WARNING]: Ignoring invalid attribute: hosts, ERROR! If variables related to geography or behavior are tied to a specific group, prefer to set them as group variables. I'm not sure where exactly to put that, though. Say you have a group_vars file with this content: --- # group_vars/all pgsql_extensions: - ext1 - ext2 - ext3 How to combine multiple vars files per host? To learn more, see our tips on writing great answers. They can be defined anywhere in the inventory, or by any other means; as long HOST_KEY_CHECKING(/home/ubuntu/ansible/ansible.cfg) = False We can create merged variable like so: Now, if we wanted to add a few more groups which are specific to host prod1: Above snippet can be placed in host_vars, but nothing stops us from using this 2.1. will be hide & seek game for future maintainers. plugin. Have a question about this project? If im applying for an australian ETA, but ive been convicted as a minor once or twice and it got expunged, do i put yes ive been convicted? [WARNING]: provided hosts list is empty, only localhost is available. Some of these variables change the way Ansible behaves as a whole and the rest of them are left for user. This setting is called 'merge'. We can set variables per host or set shared variables for groups. Adjective Ending: Why 'faulen' in "Ihr faulen Kinder"? Another option is to define variables in the inventory file. These are the values key1=value1, key2=value2 and so on in the following Maybe ansible has other methods to achieve this. DEFAULT_LOOKUP_PLUGIN_PATH(/home/ubuntu/ansible/ansible.cfg) = [u'/usr/share/ansible_plugin An example would be the. Finally, keyed_groups, regions and all these other keywords are specific to aws_ec2, and they'd work because you have plugin: aws_ec2 at the top of the first file. behaviour to merging instead. That's asking for trouble; rename the reference variables, as that will help you debugging. 589), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. November 12, 2021 Categories: Automation If you have a complex JSON data structure or perhaps an array of rich data structures as the result of module output, you may want to extract this into a workable list or dictionary you can take action on. Ansible playbook that generates and shares variable between hosts. inventory_file is the pathname and the filename pointing to the Ansibles inventory host file. Earlier releases of some minor versions may not be compatible. Using Variables Ansible Documentation If you don't mind to put that data elsewhere, the plugin accepts those values you're trying to separate as environment variables: Thanks for contributing an answer to DevOps Stack Exchange! In general, try to keep variable usage as simple as possible. It's not exactly quick & easy, but this way we rely only on builtin plugins and Like registered variables, facts are stored in memory by default. And I cannot figure it why. To access this data, we have to reference the, Ansible has a strict set of rules to create valid variable names. Can you solve two unknowns with one equation? /opt/ansible/inventories/aws_ec2.yaml ", "echo '{{ message }}' ; echo 'Connection type: {{ ansible_connection }}'", *******************************************************************************************************************, *************************************************************************************************************, *******************************************************************************************************************************, During our plays, we might find it handy to utilize the output of a task as a variable that we can use in the following tasks. Make sure your script has the .fact file extension. Some users prefer that variables that are hashes (aka 'dictionaries' in Python terms) are merged. By default, Ansible uses the memory cache plugin, which stores facts in memory for the duration of the current playbook run. Last updated on Jul 10, 2023. @jborean93 yes. For example, you can use the IP address of one system as a configuration value on another system. How to combine group variables by parsing group configuration files For example: Similarly, to reference the third field from the dictionary, use the bracket or dot notation: Note that the bracket notation is preferred as you might encounter problems using the dot notation in special cases. using Ansible set_fact for appending this. express project's configuration. With facts, you can use the behavior or state of one system as configuration on other systems. Merging nested variables from group_vars in Ansible /opt/ansible/inventories/secrets.yaml. Learn more about Stack Overflow the company, and our products. This setting is called merge. I'm currently trying to use Keycloak for SAML federation but after authentication, I get looped back to the login page.