Ansible - Post - 6 - Ansible Inventory Folder Structure:
In this blog post, we will see how to create the ansible inventory folder structure, as the configuration data grows , it will be hard to maintain the information in a single inventory file, that is where the folder structure comes into play, you can download demo2.tar.gz from the bottom of the post, you can later scp that tar.gz to your virtual box and extract it in acs home directory.
scp demo2.tar.gz [email protected]:/tmp
tar -xvf /tmp/demo2.tar.gz .
post extraction , this is how the tree structure of the folders will be.
We can see that the inventoy_prod file is similar to the inventory file that we had created earlier.
We have YAML files defined under group_vars directory and host_vars directory, the host_vars directory always take precedence that the group_vars directory. Lets taken an example of creating a user in the target system, lets see which YAML file under the vars directories takes precedence.
In “all” YAML file , we have defined the username as all_username. Please note that all the YAML file starts with 3 dashes at the top.
In “webservers” YAML file , we have defined the username as group_user, please remember that with in the group_vars directory the “webservers” YAML file takes precedence than the “all” YAML file.
Under host_vars directory, we have defined “web1” YAML file which has defined the username as web1_user
Now lets go ahead and create the user in for the servers under the group webservers. You can see that “web1_user” took precedence from the “web1” YAML file under the host_vars directory.
As you can see we are also getting a permission denied error , this is because we don’t have the root privileges for the user vagrant to create a new user in the target system .
To overcome this , we can use the “ - - sudo” command at the end which will give the root permissions.
Now the use is created successfully on the target system.
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