Application Deployment Using Ansible

APPLICATION DEPLOYMENT USING ANSIBLECliffano Subagio | @cliffano | Sensis

/me> Continuous Integration/Deployment/Delivery> Most important lesson: Never ever write a deployment framework in Ant!

/project> Micro-services architecture> 15 applications> 2 data centers> 2 x 10 app servers> 2 x 3 db servers> Hundreds of deployments to date

ansible> Orchestration + automation engine> Application deployment> System provisioning

why ansible> Push via SSH> No agents on remote systems> Readable playbook> Tasks executed in order> Built-in + custom modules> Community growth

sample usageansible-playbook --inventory-file=hosts.ini --module-path=path/to/custom-modules --extra-vars=”ENV=test VERSION=1.2.3” --tags ci -u username --verbose app-playbook.yml

sample inventory file[foo-dev]devhost1.some.domain.com

[foo-test]testhost1.some.domain.comtesthost2.some.domain.com

[bar-test]testhost1.some.domain.com

sample playbook- hosts: foo-$ENV vars: BASE=/app/ tasks: - name: Send artifact file to remote system copy: src=foo-$VERSION.tar.gz dest=$BASE/builds tags: - ci

separation of concerns> Playbook defines how to deploy an app> Inventory file defines where to deploy those apps

artifacts

app1playbook.yml

app2playbook.yml

app3playbook.yml

app4playbook.yml

app5playbook.yml

app6playbook.yml

projectinventoryfilepackage.json

> Avoid monolithic deployment configuration

deployment flow

artifact-repoapp6-0.0.3.tar.gz

jenkins

deploy-server

devsource-repo

test

stage

prodrelease-repoproject-2.3.4.tar.gz

custom module> Usage: cleanbuilds dir=/app/foo/builds/ keep=5 > Keeps the last N builds> Controls disk usage> Written in python

gnu parallel> Improve deployment time> (echo app1 && echo app2) | parallel ansible-playbook ...> Grouping and ordering of stdout & stderr> Optimised to available CPU cores

what’s next

> Write more common Ansible modules> ControlMaster, 0mq> AnsibleWorks AWX

AWX

conclusions> Ansible really works (no pun intended)> Modules encourage reusability> I’m not writing a deployment framework> Collaboration between dev, devops, ops teams

questions + discussion

slide notes> http://www.ansibleworks.com/> http://www.ansibleworks.com/docs/modules.html> http://jpmens.net/2012/10/01/dramatically-speeding-up-ansible-runs/> http://www.gnu.org/software/parallel> http://ant.apache.org> http://jenkins-ci.org