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Install Ansible

  1. To install Ansible on our control1 machine run this command:
sudo apt-get install ansible -y
  1. Firstly, let's check if Ansible is able to do tasks locally and remotely:

Locally:

cd ../vagrant/ansible
ansible control -i myhosts -c local -m command -a hostname

Remotely:

ansible nodes -i myhosts -m command -a hostname

Install Docker using Ansible

  1. Run the installation_docker.yml playbook remotely to install Docker on our nodes:
ansible-playbook -i myhosts -K installation_docker.yml

Deprecated

Install Nagios using Ansible

This part will install Nagios on the control machine to monitor our future application project.

  1. As we are connected to the control machine now, start the installation_nagios.yml playbook locally:
ansible-playbook installation_nagios.yml -i myhosts -c local

The installation process has been separated in two different playbooks to make possible the secure Nagios user password setting up.

  1. So now run this command to set your Nagios admin user password:
sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
  1. After that, we can run the second installation part start_nagios.yml that will actually start your Nagios:
ansible-playbook start_nagios.yml -i myhosts -c local
  1. After that cd to the /tmp/nagios-plugins-release-2.3.3 and run:
sudo make
sudo make install

Note: If you have Ansible installed on your local device, you can run both playbooks from it and that won't require the -c local parameter, however, it will be still required to connect to the control machine to set the Nagios Admin user password.

  1. To test if Nagios is working, open http://{{your control machine IP address}}/nagios in Web browser.

If installation has been processed with errors, you can follow this guide to install it manually: https://www.linuxfordevices.com/tutorials/ubuntu/install-nagios-on-ubuntu