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Introduction to ansible
- Ansible is an automation tool that allows users to automate tasks like configuration management, application deployment, and other IT needs across multiple servers. - It uses SSH to connect to remote servers and run commands without requiring any agents to be installed on the servers. Users only need to install Ansible on one central system. - Ansible uses simple YAML files called playbooks to define configurations and orchestrate deployments across servers. Playbooks allow rolling updates, delegating tasks, and interacting with other systems.
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Introduction to ansible
- 1. Intro to Ansible DharmitShah @dharm1t
- 2. Who am I? ➔Co-organizerof Ansible Ahmedabad & Docker Ahmedabad ➔Software Engineer @ Red Hat ➔Work on Ansible, CentOS, Docker, Vagrant, Jenkins, etc. ➔I ❤ automation
- 3. Agenda ➔What’s the problem? ➔Whatis Ansible? ➔How does Ansible try to solve it? ➔How is it different from tools in same domain? ➔How to install and use it?
- 4. The Problem ➔ Normallydev, staging and prod environments ➔ Numerous systems in each one of them ➔ Webserver, DB, Mail server, Application server etc. ➔ Different setup and multiple systems for each server type ➔ Security update, bug fix, add new system to environment
- 6. What is Ansible? ➔Radicallysimple IT automation engine ➔Automates: ◆ cloud provisioning ◆ configuration management ◆ application deployment ◆ any many other IT needs ➔Uses no agents, so easy to deploy
- 7. Ansible style solutionand difference ➔ Install Ansible on only one system ➔ SSH access to all other systems ➔ No client process running in any remote system ➔ No daemon process either! ➔ Run a command, sit back and relax
- 8. Installation ➔ pip install ➔dnf install ➔ apt-get install ➔ yum install ansible
- 9. Using Ansible ➔Modify /etc/ansible/hosts(aka Inventory file) ➔Put one or more remote systems in the file ➔Public SSH key must exist in authorized_keys on that system ➔Run ansible; it’s that easy!
- 10. ➔Modules for almostall OSes ➔Supports Docker, Kubernetes, AWS, Azure, Google Cloud, OpenStack, Rackspace, VMware ➔ansible-vault to store secrets ➔Blue-Green deployment Features
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- 12. ➔ansible localhost -msetup ➔ansible do -m ping ➔ansible do -bu root -m shell -a 'yum install nginx' ➔ansible do -bu root -m yum -a 'name=docker state=installed' ➔ansible do -bu root -m service -a 'name=docker state=started' Simple commands Imagine doing that for every package you want to install.
- 14. Ansible Playbooks ➔Configuration, deploymentand orchestration language ➔Manage configurations and deployments of remote sys ➔Rolling updates, delegate to other host, interact with monitoring servers and load balancers! ➔Still human readable!
- 15. Example $ cat playbook.yml -hosts: do remote_user: root tasks: - name: Install Docker yum: name=docker state=installed - name: Install EPEL yum: name=epel-release state=installed - name: Start & Enable Docker service: name=docker enabled=yes state=started $ ansible-playbook playbook.yml
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