Ansible intro
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This document provides an overview of Ansible, an IT automation tool. It discusses Ansible's features such as being agentless, using SSH, and being idempotent. It also covers installing Ansible, using Ansible modules, writing playbooks in YAML format, managing inventory, and using ad-hoc commands and roles for automation.
![o Config Order
1. ANSIBLE_CONFIG environment variable
2. ./ansible.cfg
3. ~/.ansible.cfg
4. /etc/ansible/ansible.cfg
o control:~ # cat /etc/ansible/ansible.cfg
[defaults]
ansible_python_interpreter = /usr/bin/python2
nocows = 1
...
Config File
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![---
- hosts: all
tasks:
- name: Hello World
shell: echo "hello world"
[
{host: "all”},
{
tasks: [
{ name: "Hello World",
shell: "echo "hello world“”}
]
}
]
YAML & JSON
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Ansible intro
- 2. o Introduction o Install o Inventory o Ad-Hoc/CLI o Playbook Outline © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY2
- 3. o What • Ansible is an IT automation tool. It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous deployments or zero downtime rolling updates. o Current version • Community: Ansible 2.2(stable), 2.3(devel) • Enterprise: Ansible tower o Feature • SSH Protocol • Agent-less (push mode) • Idempotent • Role defined • DSL: YAML(yml), Jinja2(j2) Introduction © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY3 https://www.ansible.com/
- 4. Workflow © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY4 control playbook managed ad-hoc/cli SSH
- 5. o Requirements • Python 2.6, 2.7 for control • Python 2.4, 2.5 for managed o # method1: install via yum centos:~ # yum install epel-release centos:~ # yum install ansible o # method2: install via pip centos:~ # pip install ansible Install © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY5
- 6. o Config Order 1. ANSIBLE_CONFIG environment variable 2. ./ansible.cfg 3. ~/.ansible.cfg 4. /etc/ansible/ansible.cfg o control:~ # cat /etc/ansible/ansible.cfg [defaults] ansible_python_interpreter = /usr/bin/python2 nocows = 1 ... Config File © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY6
- 7. o Main command • ansible • ansible-playbook • ansible-doc o Other command • ansible-galaxy • ansible-pull • ansible-console • ansible-vault Command © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY7
- 8. Inventory © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY8 Ref: http://docs.ansible.com/ansible/intro_inventory.html host group group of group group variable
- 9. o control:~ # cat hosts node1 ansible_ssh_host=192.168.0.11 ansible_ssh_user=root ansible_ssh_pass=password ansible_become_pass=password node2 ansible_ssh_host=192.168.0.12 ansible_ssh_user=root ansible_ssh_private_key_file=private_file o # run ansible via ad-hoc control:~ # ansible all -i hosts -m ping -vvv control:~ # ansible node1 -i hosts -m command -a uptime Ad-Hoc/CLI © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY9 module host inventory
- 10. o Ansible Module • http://docs.ansible.com/ansible/modules_by_category.html Module © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY10
- 11. Module – setup (gather fact) © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY11 playbook content
- 12. --- - hosts: all tasks: - name: Hello World shell: echo "hello world" [ {host: "all”}, { tasks: [ { name: "Hello World", shell: "echo "hello world“”} ] } ] YAML & JSON © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY12
- 13. Playbook - content © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY13 module disable gather fact
- 14. Playbook - execute © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY14
- 15. Playbook - vars © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY15
- 16. Playbook - example © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY16 copy file from control to managed loop notify condition
- 17. Playbook - roles © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY17
- 18. Directory Structure © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY18
- 19. Playbook - tags © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY19
- 20. Playbook - tasks © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY20
- 21. o Ansible o Ansible Document o Ansible: Up and Running o 現代 IT 人一定要知道的 Ansible 自動化組態技巧 Reference © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY21
- 22. Thank you! © 2016 BROCADE COMMUNICATIONS SYSTEMS, INC. INTERNAL USE ONLY @ruckuswirelessfacebook.com/ruckuswirelesswww.ruckuswireless.com 22