I have written a post about how to debug playbooks by dumping all variables in file (on remote server) by using Ansible template file. The following task shows how to declare an array variable in Ansible and how to use the values. You can configure Ansible to allow undefined variables by setting DEFAULT_UNDEFINED_VAR_BEHAVIOR to false. ansible-playbook debug_print_var.yml. By default, Ansible fails if a variable in your playbook or command is undefined. @JohnnyQ Depends on how you want to process the value. Code:---name: This will print one of Ansible facts from remote hosts: all tasks: name: Here we use Ansible debug module the ipv4 of remote debug: Example #3. To make Ansible append to the list, instead of ovewriting the last value, we'll make a few modification. To print an Ansible fact of remote hosts, we can create a simple playbook like. If you configure Ansible to ignore undefined variables, you may want to define some values as mandatory. It is for example possible to provide host_vars and group_vars by creating YAML files in a subfolder named host_vars and group_vars respectively of the folder containing the inventory file.. How can I list all of the variables Ansible would know about a group or host inside a playbook? In the following examples I will show how to use debug module to print variable values, and print variables values with by adding some […] you could do it in a few ways. Variable "devices" holds just one value: "AristaSwitch03". I'm trying to register a variable with the output to a query of a F5 pool and I'm getting this error: "
": "VARIABLE IS NOT DEFINED! According to the Ansible documentation, the return values for registered data structure in loops should return a list per item.However, processing the “results” list is not working as expected which explains why you are still reading my post . Our playbook after modifications: Ansible version is … The message is nothing but any variable values or output of any task. Notice, that you don’t need to surround the variable with curly brackets here. - hosts: all vars: hello: world tasks: - name: Ansible Basic Variable Example debug: msg: "{{ hello }}" 1.2 Ansible List (Array) variables We can also have an array or list variables. The plugin_versions is a list of dictionaries, you can print the name attribute of each dictionary using loops, here are 2 loop examples you could use:--- - hosts: localhost gather_facts: false vars: plugin_versions: - name: ace-editor version: '1.1' - name: analysis-core version: '1.95' - name: ant version: '1.9' tasks: - name: print variable - with_items debug … Ansible variables come from a variety of sources. Ansible Debug Module with Examples Ansible debug module is used to print the message in the log output. ", What is that I'm doing wrong? We will initiate "devices" var, assigning an empty list to it. We will also change the assignment expression to make Ansible append to this variable. Then, you use the debug module along with the var module option to inspect the server_uptime variable. Here is some faster and more convenient way to print multiple variables or all with debug purpose inside a playbook. In that case, you may want to require some variables … Any help Note: I tried ansible -m debug -e 'var… Perhaps you could use a Jinja2 filter to do additional "list" processing in a template. In my example I'd use with_items: nginx_auth and then access as {{item.user}} and {{item.pass}}.With your example I don't see any natural way to iterate over your value-list within the context where with_items would be used. Taking away the with_items from the debug stanza, and just explicitly defining the var or message using first.stdout returns "undefined". Below, the returned data structure debug … The playbook starts by running the uptime command on the proxy group hosts (node1) and registers the command output in the server_uptime variable.