The inventory is a simple ini file that lists all devices to configure. Now, back on the control node, you can copy the public ssh key with ssh-copy-id example: The user must have administrator privileges: sudo adduser ansible sudoĪnd to make management easier, I will configure sudo such that no password is required for user ansible: sudo visudoĪnd add the following line at the end: ansible ALL=(ALL) NOPASSWD:ALL So you should first generate a ssh key pair on the control server: ssh-keygen -t ed25519 Managed node configurationįor this example, I will create a dedicated user for ansible (but this is not required): sudo adduser ansible Sudo add-apt-repository -yes -update ppa:ansible/ansibleīy default, Ansible assumes you connect to managed devices using ssh keys.
#Ssh copy id ansible install
Sudo apt install software-properties-common Control node installationĮasiest way to install Ansible on the control node is using apt: sudo apt update So it is not optimal if the managed nodes are hidden behind a NAT, or only intermittently available (like laptops). The drawback of this architecture is that the managed nodes must be reachable from the control node. The main advantage is that there is (almost) nothing to install on the managed nodes: Ansible uses SSH to connect to the managed nodes (so there must be an SSH server installed), and python to run the modules. With Ansible the master, called 'control node' pushes the desired configuration to the 'managed nodes'. For the example we use servers running Ubuntu 22.04.
#Ssh copy id ansible how to
In this blog post we will show how to get started with Ansible. For this reasons, Ansible is sometimes coined as an infrastructure automation engine.
Moreover, Ansible modules exist to manage a wide variety of devices like Linux and Windows computers, but also network equipment like switches and routers, kubernetes clusters and other cloud services like AWS, GCE and Azure. Indeed, it relies on a system of modules (plugins) that allow to perform different tasks like software provisioning, system and application configuration management, application-deployment etc. Ansible is able to perform a wide range of tasks on a large and heterogeneous ensemble of devices. Ansible is an extremely powerful configuration management system.
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