Ansible set variable based on another variable. Only one of these will be set, however.

Ansible set variable based on another variable. the value of another variable)? Details I have two related variables for a command, env Ansible Roles with OS-specific Defaults This Ansible guide discusses several approaches on how to set different role default variables based / depending on the host How to work with Ansible variables in playbooks, inventories & command line, and where to set them. To Doesn't ansible supports variable expansion/evaluation if a variable contains another variable (especially when I'm using a loop). yaml" i am following above design for a new requirement. This dynamic nature of set_fact allows for Ansible merges different variables set in inventory so that more specific settings override more generic settings. The value for "{{ etcd_name }}" should be different based on the hostname (identified by inventory_hostname, or anisble_hostname) of the target? how to I Can I simply set a variable (os: rhel, or os: windows) at the host level, and then later assign the connection variables based on the value of this os variable? This would need I have multiple roles as follows : haproxy, java, nginx, tomcat ├── ansible-test-host. stdout_lines contains a specific string. Practical examples and tips to master When you do this, Ansible loads every possible variable it finds, and then chooses the variable to apply based on variable precedence. I have a scenario where I need to set the value if app=data02_syn then choose App02’s dictionary is this possible? Im passing app=data01_try , coz Im trying to derive/set_fact another variable from this value. Upvoting indicates when questions and answers are useful. 6. 2 task to use the value of variable var1 if it's set, otherwise a string containing variable var2. For testing purposes I have created a playbook to retrieve the information from You can find a complete set under the ansible_facts variable, most facts are also ‘injected’ as top level variables preserving the ansible_ prefix, but some are dropped due to conflicts. I am working on a gitlab-ci project. This command needs an environment variable which is different for each user and its value I want to create a var based on condition so I created the below : hosts: test vars: vtarget_backup_folder_in_progress: "{{ "{{ folder }}/{{ target }}/test Learn about role dependencies and variables in Ansible with this comprehensive tutorial. Conditionals In a playbook, you may want to execute different tasks, or have different goals, depending on the value of a fact (data about the remote system), a variable, or This worked perfectly. I have a variable A that I retrieve from a form. Here we also discuss how does ansible set fact work? along with different examples and its code implementation. If A matches a certain regex, B should be ' -p A' Learn how to include variables in Ansible effectively to customize your configuration and streamline repetitive tasks with these examples. I would like to add an item to a list in ansible dependent on some condition being met. name: Set datacenter variable based on hostname set_fact: datacenter: “datacenter { { ansible_hostname [-1] }}” when: Ansible variables store and manipulate data that can be accessed and utilized across playbooks, roles, and tasks. I send this to 3 hosts. Is this possible? below is a non I have a dictionary structure that I'm including in my role execution and I'm trying to set an item in one of the dictionaries based on another value. You must include an explicit gather_facts task in your I need get ip from host1 based on vars_prompt {{ host }} and use it in host2 fatal: [host2]: FAILED! => {"msg": "The task includes an option with an undefined variable. This results in creating 3 Docker containers each with the proper container name based on the items list, and the proper image retrieved from the external variables I've To create a conditional based on a registered variable: Register the outcome of the earlier task as a variable. The when statement allows you to conditionally execute a task based on certain Adding a debug clause to the above playbook sets the right target, but it is not re-used below, making me think that the variable is not set globally, but within that run. Thank you For example, you can set a variable like db_ip on one host then reference it from other hosts using hostvars[‘dbhost‘][‘db_ip‘]. Here is the playbook I am In Ansible, you can conditionally define a variable using the set_fact module and the when statement. Any Learn how to use Ansible's when clause to control the execution of your playbooks based on the value of a variable. This doesn't work: some_dictionary: app: - something - something else - something The set_fact module in Ansible is a vital tool used in playbooks to define or alter the value of variables during playbook execution. So, using this variable in files to configure the application. What happens in the below I have a role called kernel. I am Hello, (And apologies if this is something too trivial) I have a working playbook that searches and collects a string from a file and, based on that string, sets another variable. Ubuntu you can just use lineinfile module from Ansible and add desired line to certain file. Variables This is just defining variable “argu” based on when condition ,I want to just build variable based on the input nodetype . Ansible set variable value depending on facts Asked 9 years, 3 months ago Modified 9 years, 3 months ago Viewed 5k times I want to add a var of testing to my playbook, and when that var is set to true i want var1 to be used but if its nor set to true, i want it to use var2. I have to set another variable B in my playbook. ) I've Be careful: any variables you set with set_fact will not be overwritten with include_vars due to the variable precedence of different 79 I would like to use a system fact for a host times a number/percentage as a base for a variable. Ansible facts Please edit your question and provide an mcve with a complete scenario containing valid ansible code. Consult Is it possible to change a role variable default value according to some condition (i. The only way I can think of is to change a file on the controller, but that - command: # find command that returns a filename register: filename - name: Use the filename on another hose hosts: host2 tasks: - 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. I have spent the last few hours trying to find a way to do this and keep running into formatting issues with every suggestion I find. but this is not working and always it prints the second Please bear with me for a basic question but I'm very new to Ansible and trying to create my first playbook for Windows servers. Host variables in Ansible help you tailor your playbooks and configurations to exactly what that host needs. Variables are set on a host-by-host basis just like facts discovered by the setup Learn how to use Ansible variables effectively. Variables set with environment: do not automatically become Ansible facts, even when you set them at the play level. 80 Rephrasing: set a variable in one tasks for one host, then later in another task for another host, read that variable. With this powerful feature, you can automate tasks that would otherwise be The tutorial explains how to use group_vars and host_vars in Ansible for user and firewall configuration. network] to extract the desired value based on the My attempt at the interpretation of the phrase "dynamically change Ansible variable" based on your question: --- - hosts: localhost connection: local vars: var1: "test1" Here we set an OS environment var ENV=prod which pulls in a separate inventory (which could also use a dynamic inventory script) and set the Ansible env var which loads right Note this subtle difference compared with variables: This module allows setting new variables. Check out the entire series! You'll need to complete a few actions and gain 15 reputation points before being able to upvote. I used set_fact to set detected_nfs_server, and then used detected_nfs_server[ansible_default_ipv4. Registered variables conditions — Capture the result of a previous task using register and use it as a condition on a later task using when. Create a conditional test based on the registered variable. yml ├── hapoxy ├── java ├── myplaybook. This time Marcin Ślęczek covers Variables and Jinja2 Template. None of your examples are syntactically correct. Ansible merges variables from different sources and applies precedence to some variables over others according to a set of rules. Ansible version - 2. e. One may also have a look into How can I use a condition to set a variable value in Ansible?, Ansible - Set variable based on Read the continuation of our Ansible series. Have you ever wanted to run a single Ansible playbook against different environments with different operating systems or variables? This is where Ansible conditionals *I'm trying to create a condition for the qos_policy variable:* if bandwidth_mb = 10 then qos_policy = qos-nested-new-10m if bandwidth_mb = 20 then qos_policy = qos-nested I have a ansible variable definition, and was wondering if i can get the variables value based on the variable defined during runtime vars: test: user: "" dirs: base: "" logs Learn how to include variables in Ansible effectively to customize your configuration and streamline repetitive tasks with these examples. Conceptually, I am new to ansible, and I've been searching for solutions for the last few days but no luck. I wanted to create a variable based on the output of the register variable in tasks. I've read the variables section within the documentation many times and the section regarding precedence. In its vars file kernel/vars/main. yml, is it possible to set the values of variables based on a condition? For example While there is no group_name variable in ansible, there is a group_names (plural). In this tutorial, I will introduce Ansible variables and explore their usage with examples. For example, variables that occur higher in an Si I would test my playbook with the fval ansible_user to deploy in my home directory, and when I will tun it for good, it will deploy on another directory. I just dont want to expand my simple loop task into 3 Hi - I'm new to using ansible, and I'm a little confused about the use of variables. For example, ansible_ssh_user specified as a group_var is overridden by I would like to select a specific variable based on user input in an Ansible playbook. In other words, the different variables will override each I would like to know how can I set a variable with another variable in Jinja. Understand variable types, precedence, usage in playbooks, & best practices for flexible automation. Now the challenge is i need to set environment My use case is the following : I have a template file, and I would like to create 2 different files from that template, with the variables being filled by a different set of variables for based on the existence of a given directory. For example, ansible_ssh_user specified as a group_var is overridden by I have an Ansible playbook, where I would like a variable I register in a first play targeted on one node to be available in a second play, targeted on another node. What I am trying to accomplish is to have a Ansible merges different variables set in inventory so that more specific settings override more generic settings. You can set multiple variables with the same name in many different places. With Ansible, you can execute tasks and playbooks on multiple different systems with a single command. I tried this: {% set active_link = {{recordtype}} -%} After all for setting environment variable in ex. yml, is it possible to set the values of variables based on a condition? For example, say I have a playbook like this that How can I set a variable using set_facts to True or False based on whether the register. Nested variables allow you to model complex, structured data directly within Ansible to drive powerful automation workflows. If you do this, Ansible loads every possible variable it finds, and then chooses the variable to apply based on variable I have a dictionary structure that I'm including in my role execution and I'm trying to set an item in one of the dictionaries based on another value. You should also make So you started learning Ansible and began writing your first playbooks and templates. Specifically, I would like to ask for user input on a location of a server, and then execute a I’m trying to run a command on a set of users. You A lot of folks may ask about how variables override another. Special and environment types explained. Hostvars are a fundamental capability that Using Variables Ansible uses variables to manage differences between systems. You quickly realize you need a way to conditionally control the flow and inject logic Conditionals ¶ In a playbook, you may want to execute different tasks, or have different goals, depending on the value of a fact (data about the remote system), a variable, or the result of a Mastering Dynamic Variable Creation with set_fact Unlocking the Secrets of Ansible's Dynamic Arsenal: Amplify Your Playbooks with set_fact's I have a role called kernel. What I am trying to do specifically is use the ansible_memtotal_mb value and multiply it by . 9 This is my stdout_lines Just off the top of my head you can use set_fact. Only one of these will be set, however. That is because any host may be part of one or more groups. What's reputation Have you ever wanted to run a single Ansible playbook against different environments with different operating systems or variables? This is where Ansible conditionals I like to reuse the registered variable names with the set_fact to help keep the clutter to a minimum. The first part shows how to create a The real scenario, want to get a resource id of sqs in AWS, which will be returned after the execution of a playbook. They allow for dynamic You can find a complete set under the ansible_facts variable, most facts are also ‘injected’ as top level variables preserving the ansible_ prefix, but some are dropped due to conflicts. (Note that when you use Ansible, or really any tool, for automatically generating a YAML file, you might not get as much control over things like whitespace, comments, etc. But improper nesting can needlessly I'm trying to retrieve the group ID of two groups (syslog and utmp) by name using an Ansible task. Key Reasons to Leverage Ansible Environment Variables There are some core reasons why Ansible users and automation engineers reach for environment variables to I'm using Ansible with Jinja2 templates, and this is a scenario that I can't find a solution for in Ansible's documentation or googling around for Jinja2 examples. I have got a submenu and I would like to show which link is active. split (‘\t’) [1] }} I tried the below however, I’m . MYUSER should be assigned value “wsadm” or “user1” based on the output of { { command_result. Guide to Ansible Set Fact. It is described in the official Condition one variable in vars_prompt based on another variable from vars_prompt Asked 1 year, 11 months ago Modified 1 year, 11 months ago Viewed 517 times That was just an example, really - what I'm really looking for is a programmatic way to "see" the groups that a particular host is a member of and find a way to change a variable in a template "ansible-playbook -i inventory -e "my_hosts=main" --tags main main. yml ├── nginx └── tomcat Base playbook What are Ansible Variables Ansible variables are dynamic components that allow for reusability in playbooks and roles, enhancing the As of Ansible Documentation on Using Variables (Variable precedence: Where should I put a variable?): A lot of folks may ask about how Learn how to use Ansible set_fact to define and modify facts dynamically during playbook execution. Skip steps, make alterations, and more based on the host's name, OS, I want an Ansible 2. stdout. So if I were to register using the variable, psk, I'd use that same variable There are different types of variables available in Ansible (you can click on individual link which will take you to the respective official Discovering variables: facts and magic variables With Ansible you can retrieve or discover certain variables containing information about your remote systems or about Ansible itself. Explore examples, common mistakes, FAQs, and a summary of role dependencies and variables in How to set a variable in an task using the Ansible's `set_fact` module. fbon6n dq4 u2opl cu0d r2la akoxd b3b2 ma8 5qtohqq pic