Ansible lightning talk at Scale 12

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Justin Garrison

Really simple configuration management and orchestration with Ansible

Technology

# apt-get install ansible
# yum install ansible
# pip install ansible
$ git clone git://github.com/ansible/ansible.git

# /etc/ansible/hosts
app01.xmpl.info

FQDN

# /etc/ansible/hosts
app01.xmpl.info
[web]
Group
web01.xmpl.info
web02.xmpl.info

# /etc/ansible/hosts
app01.xmpl.info
[web]
web[01:05].xmpl.info
Black Magic

# /etc/ansible/hosts
app01.xmpl.info
[web]
web[01:05].xmpl.info
[db]
db-[a:c].xmpl.info ansible_ssh_user=dbadmin
Host Variables

# /etc/ansible/hosts
app01.xmpl.info
[web]
web[01:05].xmpl.info
[db]
db-[a:c].xmpl.info ansible_ssh_user=dbadmin
[production]
web
Nested Groups
db-[a:b].xmpl.info

Modules
http://j.mp/ansible-modules

ec2, gce, rax, quantum, docker
facter, ohai, mount, modprobe, cron
yum, apt, gem, pip, service
mysql, postgresql, redis, riak
nagios, jabber, irc, mail, osx_say,
pingdom

Recap
1. Install Ansible
2. Create inventory (/etc/ansible/hosts)
LOL
3. Install Agent
4. Automate

# ansible production -m apt -a upgrade=dist
everything else
app01.xmpl.info
db-c.xmpl.info

[production]
web
db-[a:b].xmpl.info

# ansible !production -m apt -a upgrade=dist

--- Exit Strategy (GTFO)
- name:
file: path=/ state=absent
recurse=yes
when: theyre_on_to_us|bool
tags: YOLO

--- DNS fix
- name:
template: src=hosts.j2
dest=/etc/hosts
owner=root group=root
mode=0644

$#/etc/hosts 127.0.0.1 localhost {{ansible_hostname}} {% for k,v in hostvars.iteritems() %} {{v['ansible_eth0']['ipv4']['address] }} {{k}} {% endfor %}$

Other Cool Stuff
roles
handlers
loops (with_items)
rolling updates
task delegation

Recap
1. On

the fly orchestration
2. Idempotent playbooks
3. You already have all the
infrastructure you need (SSH)

Further Reading
docs.ansible.com
galaxy.ansible.com
j.mp/ansible-modules
j.mp/ansible-examples
j.mp/ansible-lightning-talk

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1. @rothgar /rothgar

4. # apt-get install ansible # yum install ansible # pip install ansible $ git clone git://github.com/ansible/ansible.git

5. Host Inventory

6. # /etc/ansible/hosts app01.xmpl.info FQDN

7. # /etc/ansible/hosts app01.xmpl.info [web] Group web01.xmpl.info web02.xmpl.info

8. # /etc/ansible/hosts app01.xmpl.info [web] web[01:05].xmpl.info Black Magic

9. # /etc/ansible/hosts app01.xmpl.info [web] web[01:05].xmpl.info [db] db-[a:c].xmpl.info ansible_ssh_user=dbadmin Host Variables

10. # /etc/ansible/hosts app01.xmpl.info [web] web[01:05].xmpl.info [db] db-[a:c].xmpl.info ansible_ssh_user=dbadmin [production] web Nested Groups db-[a:b].xmpl.info

11.

12. THERE ARE NO AGENTS! SSH Python 2.4+

13. Modules http://j.mp/ansible-modules ec2, gce, rax, quantum, docker facter, ohai, mount, modprobe, cron yum, apt, gem, pip, service mysql, postgresql, redis, riak nagios, jabber, irc, mail, osx_say, pingdom

14. Recap 1. Install Ansible 2. Create inventory (/etc/ansible/hosts) LOL 3. Install Agent 4. Automate

15. # ansible production -m apt -a upgrade=dist everything else app01.xmpl.info db-c.xmpl.info [production] web db-[a:b].xmpl.info # ansible !production -m apt -a upgrade=dist

16. Playbooks

17. # ansible-playbook site.yml

18. --- YAML: module: other_options:

19. --- Exit Strategy (GTFO) - name: file: path=/ state=absent recurse=yes when: theyre_on_to_us|bool tags: YOLO

20. --- DNS fix - name: template: src=hosts.j2 dest=/etc/hosts owner=root group=root mode=0644

21. #/etc/hosts 127.0.0.1 localhost {{ansible_hostname}} {% for k,v in hostvars.iteritems() %} {{v['ansible_eth0']['ipv4']['address] }} {{k}} {% endfor %}

22. Other Cool Stuff roles handlers loops (with_items) rolling updates task delegation

23. Recap 1. On the fly orchestration 2. Idempotent playbooks 3. You already have all the infrastructure you need (SSH)

24. Further Reading docs.ansible.com galaxy.ansible.com j.mp/ansible-modules j.mp/ansible-examples j.mp/ansible-lightning-talk

Ansible lightning talk at Scale 12

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