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Configure Ansible Managed Nodes

The power of Ansible comes in being able to remotely manage a fleet of servers. For that to happen though we need to first configure our managed nodes. In this lab we'll practice configuring these nodes. *This course is not approved or sponsored by Red Hat.*

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Path Info

Clock icon Intermediate
Clock icon 30m
Clock icon Oct 18, 2019

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Table of Contents

  1. Challenge

    Set up the Ansible Inventory

    We need to make sure Ansible has the new servers in its inventory. Edit /etc/ansible/hosts and add lines similar to the following:

  2. Challenge

    Set up Passwordless SSH Between Nodes

    Note that we already have a SSH key in root's .ssh directory. We don't have to create a new one though. Let's just re-use what we have.

    Copy that key to one of the new servers:

    ssh-copy-id ansible@WebServer1

    Put in the password and the key will be copied over. Repeat this with the other two servers.

  3. Challenge

    Configure Passwordless Privilege Escalation

    Connect to WebServer1 as cloud_user. From there, use sudo to escalate and have root privileges.

    As root, run visudo. Add ansible ALL=(ALL) NOPASSWD: ALL to the end of the file.

    Repeat this on the other two servers.

  4. Challenge

    Ensure Correct Configuration

    Make sure that everything was done correctly by running ansible all -m ping --become to have Ansible attempt to connect to all the other servers and escalate privileges.

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