Ansible is a configuration management tool released by Redhat which helps IT Admins and Devops engineers take and keep control of their IT platforms. I’ve never had the chance to play with Ansible before and plan to add this into my VRA home lab setup so i need to get the base install done. The below is not best practice and should not be deployed into a production environment in this manor, please review the official documentation.
To start i like to take a snaphot of my VM so i was have a place to go back to if i make a mistake and i’m to far down a hole and have to rebuild. I also have a second CentOs server that i’m going to use as my target machine, this is a clean install also.
to Start i’ll run a update on my ansible server to update all the packages for the OS
sudo yum -y update
Then we need to install the EPEL Repo this is Extra Packages for Enterprise Linux
sudo yum install epel-release
you can check that this is installed by running
sudo yum repolist
we can now install Ansible
sudo yum install ansible -y
When that has installed check the version
create a SSL key so the the master server will be able to connect to the target servers and do a ssh copy to the target server
you should now be able to ssh to the target server using ssh root@<TargetServerIP> without getting a password prompt
Next step is to add this target server to the hosts file in Ansible
Uncomment a section or create a new one using [ ] as the header, i’m using [LabServers] as per below. Enter the IP address of the target server. Make sure there are no spaces in the header name otherwise it will throw an error.
when you run a ansible ping you should get a success message
ansible -m ping all
to test this is now working we will use the script module to install a web server on the target and start the web services.
vi Webserver.sh File contents: sudo yum update httpd -y sudo yum install httpd -y sudo firewall-cmd --permanent --add-service=http sudo firewall-cmd --permanent --add-service=https sudo firewall-cmd --reload sudo systemctl start httpd
write and close the file and then run the below command
ansible -m script -a './Webserver.sh' all
you should see a output like this
on the target server the before and after the script has been executed
To follow on from this post i will be integrating Ansible into VRA 8.x and then calling some of these configurations as part of VRA blueprints.