Automating with Ansible
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Ricardo Schmidt gave a presentation on Ansible, an open source tool for configuration management, application deployment, provisioning, and orchestration. He explained that Ansible is fast, clear, complete, and secure. It uses SSH to connect to nodes agentlessly without requiring additional firewall rules or open ports. Key components include the inventory to define hosts and groups, modules to run tasks on nodes, and playbooks to orchestrate tasks across multiple hosts. The presentation demonstrated Ansible's capabilities through examples and a demo of its core features.
![Inventory: Groups
[webservers]
web1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.50
web2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.51
web3.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.52
[database]
mysql1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.54
mysql2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.55](https://image.slidesharecdn.com/ansible-150117150858-conversion-gate02/85/Automating-with-Ansible-15-320.jpg)
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Automating with Ansible
- 1. Ricardo Schmidt / [email protected] Automating with Ansible
- 3. Who Am I? - - - - define devops user - user: name=Ricardo Schmidt [email protected] accent=Brazilian
- 4. What we will use in this presentation - Linux - YAML My examples use: - Vagrant - EC2/AWS
- 5. What’s Ansible? • Open source tool, created +- 3 years ago by Michael DeHaan. • Configuration Management + Application Deployment + Provisioning + Orchestration. • Written in Python. • Competes with Puppet, Chef, Salt Stack.
- 6. Ansible is… • Fast • Clear • Complete • Secure
- 7. Fast • Minimal Setup • Manage 5 or 5000 nodes • Short learning curve - It is easy to learn
- 8. Clear • Developers • System Administrators • IT Management
- 10. Secure • Go Agentless! • SSH transport • No additional firewall rules • No additional open ports • Use your own user • You can sudo
- 11. Dynamic Provisioning • Ansible can manage your cloud.
- 12. Key Components of Ansible • Inventory • Modules/Tasks • Ad-Hocs • Plays • Playbooks
- 13. Inventory • Hosts and Groups • Port and address • Remote/sudo usernames
- 14. Inventory: Hosts web1.example.com ansible_ssh_port=5555 ansible_ssh_host=192.168.1.50 Inventory Name SSH port Connection address
- 15. Inventory: Groups [webservers] web1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.50 web2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.51 web3.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.52 [database] mysql1.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.54 mysql2.example.com ansible_ssh_port=22 ansible_ssh_host=192.168.1.55
- 16. Modules • Bits of code copied to the target system. • Modules avoid changes to the system unless a change needs to be made. • You can write your own modules.
- 17. Modules: Commonly Used • apt/yum • copy • ec2 • file • service • git • user 200+ Ansible Modules
- 18. Tasks Task is a declaration about the state of a system. - name: install memcached yum: name=memcached state=present - name: Create database user with all database privileges mysql_user: name=bob password=12345 priv=*.*:ALL state=present
- 20. Ad-Hoc commands $ ansible web-hosts -m file -a "path=/opt/cache state=directory" $ ansible web-hosts -m yum -a "name=nginx state=present" $ ansible web-hosts -m service -a "name=nginx enabled=yes state=started"
- 21. Playbook / Play --- - name: This is Play 1 hosts: web-servers remote_user: fred sudo: yes tasks: - name: create user user: name=ricardo - name: install nginx yum: name=nginx state=present - name: This is Play 2 hosts: memcache-1 remote_user: root tasks: - name: install memcached yum: name=memcached state=present - name: start memcached service: name=memcached state=started - name: copy file ABC to somewhere files: name=/etc/abc state=/etc/abc
- 22. Demo Time • inventory • ad-hoc commands • playbook
- 23. Support to Windows Starting in version 1.7, Ansible also contains support for managing Windows machines. This uses native powershell remoting, rather than SSH.
- 24. Ansible Galaxy • Collection of 500 roles • Community reviewed • Great starting point http://galaxy.ansible.com
- 25. What we didn’t talk… • Variables • Templates • Roles • Ansible-vault • Ansible Tower
- 26. How should I start with Ansible? ansible.com docs.ansible.com twitter: @ansible
- 27. Q&A Thanks! Looking for a new Job? strut.ly is hiring! Talk to me! Ricardo Schmidt - [email protected]
Editor's Notes
- #9: It's easy to write, read, maintain, and evolve
- #10: - Provisioning - Create a new node (for example an EC2 node), bootstrap it and then do the configuration management you want to. - Configuration management involves modifying servers from a state A to a desired state B (Install packages, make sure services are running, create users, etc). - Orchestration is when you combine multiple automation tasks for a specific purpose, where the result of the event A can be used in the event B (deploy a web application stack, network, firewalls).
- #25: Presenter 2