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ANSIBLE SHELL CMD HOW TO
ANSIBLE SHELL CMD INSTALL

This command will run on all servers from group1, except server2: To include an exception in a pattern, use an exclamation mark, prefixed by the escape character \, as follows.

ansible server1: server2: dbservers -i inventory -m ping.

You can also specify multiple hosts and groups by separating them with colons: For instance, this is how you would check connectivity for every host in a group named servers: When running ad hoc commands with Ansible, you can target individual hosts, as well as any combination of groups, hosts and subgroups.

This example configuration will assign a custom user and SSH key only for connecting to the servers listed in group_a. The following example inventory file sets up the ansible_user variable only for the server1 server:Īnsible_ssh_private_key_file= /home/sammy/.ssh/custom_id Then, you won’t need to provide those parameters in the command line. Once you’re able to connect using the appropriate options, you can adjust your inventory file to automatically set your remote user and private key, in case they are different from the default values assigned by Ansible.

ANSIBLE SHELL CMD HOW TO

Note: For more information on how to connect to nodes, please refer to our How to Use Ansible guide, which demonstrates more connection options.

ansible all -i inventory -m ping -private-key= ~/.ssh/custom_id.

If you’re using a custom SSH key to connect to the remote servers, you can provide it at execution time with the -private-key option:

ansible all -i inventory -m ping -u sammy.

To connect as a different remote user, append the command with the -u flag and the name of the intended user: Adjusting Connection Optionsīy default, Ansible tries to connect to the nodes as a remote user with the same name as your current system user, using its corresponding SSH keypair. Once you get a "pong" reply back from a host, it means the connection is live and you’re ready to run Ansible commands on that server. When prompted, type yes and then hit ENTER to confirm.

If this is the first time you’re connecting to these servers via SSH, you’ll be asked to confirm the authenticity of the hosts you’re connecting to via Ansible. It also features the -i flag, which tells Ansible to ping the hosts listed in the specified inventory file This command uses the current system user and its corresponding SSH key as the remote login, and includes the -m option, which tells Ansible to run the ping module. The following command will test connectivity between your Ansible control node and all your Ansible hosts.

Then, make sure you’re able to connect to your nodes by running the connection test outlined in the section Testing Connection to Ansible Hosts. To set this up, please refer to the guide on How To Set Up Ansible Inventories. Make sure you have a working inventory file containing all your Ansible hosts.

An inventory file set up on the Ansible control node.

To set this up, you can follow Step 2 of How to Set Up SSH Keys on Ubuntu 20.04. This user can be either root or a regular user with sudo privileges.

The Ansible control node’s SSH public key added to the authorized_keys of a system user.

This guide assumes your Ansible hosts are remote Ubuntu 20.04 servers. An Ansible host is any machine that your Ansible control node is configured to automate.

ANSIBLE SHELL CMD INSTALL

To set up Ansible, please follow our guide on How to Install and Configure Ansible on Ubuntu 20.04. Make sure the control node has a regular user with sudo permissions and a firewall enabled, as explained in our Initial Server Setup guide. This guide assumes your control node is an Ubuntu 20.04 machine with Ansible installed and configured to connect to your Ansible hosts using SSH keys. In order to follow this guide, you’ll need: In this cheat sheet guide, you’ll learn how to use Ansible ad hoc commands to perform common tasks such as installing packages, copying files, and restarting services on one or more remote servers, from an Ansible control node. Unlike playbooks - which consist of collections of tasks that can be reused - ad hoc commands are tasks that you don’t perform frequently, such as restarting a service or retrieving information about the remote systems that Ansible manages. With a minimalist design intended to get users up and running quickly, it allows you to control one to hundreds of systems from a central location with either playbooks or ad hoc commands. Ansible is a modern configuration management tool that facilitates the task of setting up and maintaining remote servers.