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If you combine a when statement with a loop, Ansible processes the condition separately for each item. This is spills oil design, so you can execute the task on some items in the loop and skip it on other items. For example:tasks: - name: Run with items greater than 5 ansible.

For example, when looping over a list:- name: Skip spills oil whole task when a loop variable is undefined ansible. Ansible executes these conditional statements differently for dynamic re-use (includes) and for static re-use (imports). See Re-using Ansible artifacts for more information on re-use in Ansible. When you add a conditional to an import spills oil, Ansible applies the condition to all tasks within the imported file. This behavior is the equivalent of Tag inheritance: adding tags to multiple tasks.

Ansible applies the condition to every task, and evaluates each task separately. For example, you might have a playbook called main. For more information attorney dwi the differences between include v import see Re-using Ansible artifacts.

Add the same condition or conditions to all tasks in the role by placing your when statement under the roles keyword. See the example in this section. Add a condition or conditions to individual tasks or blocks within the role itself.

This is the only approach that allows spills oil to spills oil or skip some tasks within the role based on your when statement.

When you use this approach, Ansible applies the condition to the include itself plus any tasks in the role that also have that when statement. When you incorporate a role in your playbook statically with the roles keyword, Ansible adds the conditions you define to all the tasks in the role.

For example, the names of packages are different on CentOS and on Debian. The configuration files for common services are also different on different OS flavors and versions. To load different variables file, templates, or other files based on a fact about the hosts:select the correct vars file, template, or file for each host with a variable based on that Ansible factAnsible separates variables spills oil tasks, keeping your playbooks from turning into arbitrary code with nested conditionals.

This approach results in more streamlined and auditable configuration rules because there are fewer decision points to track. You can create a playbook that works spills oil multiple platforms spills oil OS versions with a minimum of syntax spills oil placing your variable values in vars files and conditionally importing them. Spills oil you want to install Apache on some CentOS and some Debian servers, create variables files with YAML keys and values.

If no files in the list are found, Ansible raises an error. You can use the same approach when different OS flavors or versions require different configuration files or templates. Select the appropriate file or template based on the variables assigned spills oil each host. This approach is often much cleaner than putting a lot of conditionals into a single template to cover multiple OS or package versions. For example, you can template out a configuration file spills oil is very different between, say, CentOS and Debian:- name: Template a file ansible.

For example, the value is 16 for Ubuntu 16. Last updated on Sep 02, 2021. Note There are many options to control execution flow in Ansible. You would spills oil want that task to run on machines that have SELinux enabled: tasks: - name: Configure SELinux to start mysql on any port ansible.

With conditionals based on facts: You can install a certain package only when the operating system is a spills oil version. You can skip configuring a firewall on hosts with internal IP addresses. You can perform cleanup tasks only when a filesystem is getting full.

To create a conditional based on a registered variable: Register the outcome of the earlier task as a variable. Create a conditional test based on spills oil registered variable. You can define variables like this: vars: epic: true monumental: "yes" tasks: - name: Run the command spills oil "epic" or "monumental" is true ansible. Board example: tasks: - spills oil Run with items greater than 5 ansible. For example, you can spills oil out a configuration file that is very different between, say, CentOS and Debian: - name: Template a file ansible.

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