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What is the use of Fetch module in ansible?

Posted on September 4, 2022 by Author

What is the use of Fetch module in ansible?

When to use the fetch module vs copy module The fetch module is used when you want to move files from the remote host to the local host (i.e. fetch a file from the remote host). The copy module is used when you want to put files onto the remote host, or you want to copy files to another location on the remote host.

What is flat in ansible?

flat. no. Allows you to override the default behavior of appending hostname/path/to/file to the destination. If dest ends with ‘/’, it will use the basename of the source file, similar to the copy module.

How copy file from remote server to local ansible?

To copy a file from remote to local in ansible we use ansible fetch module. Fetch module is used to fetch the files from remote to local machine. In the following example i will show you how to copy a file from remote to local using ansible fetch module. Note: If you execute above playbook the target.

What is a module in ansible playbook?

Ansible modules are reusable, standalone scripts that can be used by the Ansible API, or by the ansible or ansible-playbook programs. They return information to ansible by printing a JSON string to stdout before exiting. They take arguments in one of several ways which we’ll go into as we work through this tutorial.

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How do I fetch a file from a remote server?

The scp command issued from the system where /home/me/Desktop resides is followed by the userid for the account on the remote server. You then add a “:” followed by the directory path and file name on the remote server, e.g., /somedir/table. Then add a space and the location to which you want to copy the file.

What is Run_once in Ansible?

Ansible run_once parameter is used with a task, which you want to run once on first host. When used, this forces the Ansible controller to attempt execution on first host in the current hosts batch, then the result can be applied to the other remaining hosts in current batch.

What does Set_fact do in Ansible?

Ansible set_fact is a useful tool. This helps you to gather information from your remote hosts and adds the flexibility of modifying it before assigning it. Also, you may acknowledge that if you have a lot of hosts to be managed by Ansible, then working with set_fact is quite complex.

How do I use a playbook in Ansible?

There are four ways to run ansible playbook locally and we have listed them all here.

  1. Method1: Specify Localhost in your hosts directive of your playbook.
  2. Method2: Using local_action clause in the ansible playbook.
  3. Method3: Add an entry in your Inventory.
  4. Method4: Specify in the Ansible Command line.
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How do I list ansible modules?

You can execute modules from the command line.

  1. ansible webservers -m service -a “name=httpd state=started” ansible webservers -m ping ansible webservers -m command -a “/sbin/reboot -t now”
  2. – name: reboot the servers command: /sbin/reboot -t now.
  3. – name: restart webserver service: name: httpd state: restarted.

How do I use custom modules in ansible?

You can add a local module in any of below locations as Ansible automatically loads all executable files found in those directories as modules.

  1. ~/.ansible/plugins/modules/
  2. /usr/share/ansible/plugins/modules/
  3. any directory in ANSIBLE_LIBRARY environment variable.

How do I transfer files to a remote server?

To copy files from a local system to a remote server or remote server to a local system, we can use the command ‘scp’ . ‘scp’ stands for ‘secure copy’ and it is a command used for copying files through the terminal. We can use ‘scp’ in Linux, Windows, and Mac.

How to efficiently use Ansible fetch module?

To efficiently use Ansible fetch module, one much learn about all available parameters, their acceptable values. Also, there are some parameters that have default values set always, which will be realized to your playbook even if you do not mention the related parameter in the playbook. So these become more important to know.

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Why is my Ansible playbook not working?

This will cause the playbook failure when Ansible is unable to read files on source systems, reason can be anything like permission, non-existence, etc. Available values are yes and no. flat: Default is no. Acceptable values are yes and no. This is to set the override the default behavior of the fetch module.

What is the use of Ansible Buildin copy?

This module works like ansible.builtin.copy, but in reverse. It is used for fetching files from remote machines and storing them locally in a file tree, organized by hostname. Files that already exist at dest will be overwritten if they are different than the src.

Why does my Ansible file transfer take up so much memory?

When running fetch with become, the ansible.builtin.slurp module will also be used to fetch the contents of the file for determining the remote checksum. This effectively doubles the transfer size, and depending on the file size can consume all available memory on the remote or local hosts causing a MemoryError.

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