![Configuration of ansible
• Do the following on the Server machine
• Create the list of client machines you wish to access via this server
• vi /etc/ansible/hosts ( And enter the following lines and save file)
• [Servers]
• 192.168.85.135
• 192.168.85.136
• Run the ping command below to see if indeed you are reaching both client
nodes
• ansible -m ping all](https://image.slidesharecdn.com/ansiblepresentation-240401034727-a7bf2fad/85/ansible-presentation-with-documentation-pptx-8-320.jpg)
ansible-presentation-with-documentation.pptx
- 1. Introduction to Ansible Presented by Frank Kuse
- 2. Introduction to Ansible • Ansible is a radically simple IT automation platform that makes your applications and systems easier to deploy. • It support configuration management with examples as below. • Configuration of servers • Application deployment • Continuous testing of already install application • Provisioning • Orchestration • Automation of tasks
- 3. Why Automation? • Tasks in code • Collaboration • Eliminate errors • Write once • Laziness • Etc….
- 4. Why Ansible • It is a free open source application • Agent-less – No need for agent installation and management • Phython/yaml based • Highly flexible and configuration management of systems. • Large number of ready to use modules for system management • Custom modules can be added if needed • Configuration roll-back in case of error • Simple and human readable • Self documenting
- 6. Installation of Ansible • Install packages below on the Server Machine • sudo apt-get install python-yaml python-jinja2 python-paramiko python-crypto python-keyczar ansible • Install packages below on the client Machines • sudo apt-get install python-crypto python-keyczar
- 7. Create the RSA Key Pair • The first step is to create the key pair on the Server machine • ssh-keygen –t rsa • Once you have entered the Gen Key command, you will get a few more questions: • Enter file in which to save the key (/home/test/.ssh/id_rsa): • Enter no password for the next prompt • Copy the Public Key • ssh-copy-id test@192.168.85.135 • Repeat the same process for other machines you wish to login automatically with. • Ensure the test username has sudo access to the remote clients
- 8. Configuration of ansible • Do the following on the Server machine • Create the list of client machines you wish to access via this server • vi /etc/ansible/hosts ( And enter the following lines and save file) • [Servers] • 192.168.85.135 • 192.168.85.136 • Run the ping command below to see if indeed you are reaching both client nodes • ansible -m ping all
- 9. Examples of ansible commands • The output show ping result success as shown below
- 10. Examples of ansible commands (Cnt) • How to run commands to fetch hard drives utilization • ansible -m command -a 'df -h' Servers • How to run commands to fetch system uptime • ansible -m command -a ‘uptime' Servers
- 11. Examples of ansible commands ( Cnt) • The full configuration environment inventory of a particular client machine can be obtain using the command below. • ansible -m setup 192.168.85.135 ( output as shown below)
- 12. Creating an ansible-playbook template • Create a template to enable the installation of an NTP service with content as shown below and file saved as ntp.yml
- 13. Understanding ansible playbook configurations • In order to use ansible with SSH passwords you will need to install the program below • sudo apt-get install sshpass • Ansible-playbook command can be executed to run the ntp.yml file as below • ansible-playbook -k -K ntp.yml • The –k –K switches allow you to be able to use your ssh key and passwordless sudo. • Every playbook configuration begins with triple dash ( ----) • The hosts, tasks, name, action are various instructions commands to help automate your ntp installation process.
- 14. Understanding ansible playbook configurations (cnt) • The output of the ansible-playbook command as below
- 15. Ansible Documentations • You can find more explanation in the Ansible Docs. • Ad-hoc commands • Inventories • Variables • Modules • Playbook Roles • Similar tools that does the same function as Ansible are as below. • Puppet • Chef • Salt