DevOps (3) - Ansible —

Mulodo Vietnam Co., Ltd.

Our Purpose Make ourselves ‘Dev Company’ from ‘factory’.

Points Engineering knowledge <- * TODAY * Logical Thinking Co-operation work

— Study Group —

What’s DevOps? Mindset of filling gap between Dev and Ops. It’s not any technologies or solutions.

C.A.M.S Culture

Bust silos. Don’t say “no”. Involve everyone. Automation

XXX as Code. Ask machines to do same things. Metrics

monitor, find failure, Improve, make a plan. Share

Dev->Ops, Ops->Dev, share metrics.

Feedback of previous study

Feedback of previous study (2)

What’s Vagrant? manager of Virtual Machines

Vagrant can manage … Virtual Box VMware (Fusion) AWS EC2 ….

Trigger of automation engine. Vagrant run …

Ansible Chef Puppet ….

Ansible simple IT automation engine

What’s Ansible?

Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs.

(http://www.ansible.com/)

Goal

Server Apps

Apache

PHP

MySQL

Product Apps

Source

Data

Cron

Virtual server

Vagrant+ ansible+ fabric

automation

Today: learn Ansible

Goal

Server Apps

Apache

PHP

MySQL

Product Apps

Source

Data

Cron

Virtual server

Vagrant+ ansible+ fabric

automation

Today: learn Ansible

Goal

Server Apps

Apache

PHP

MySQL

Product Apps

Source

Data

Cron

Virtual server

Vagrant+ ansible+ fabric

automation

Today: learn Ansible

How Ansible work?Hosts[httpd] 192.168.33.40 192.168.33.41 [backend] 192.168.33.50

Playbook (YAML file)- hosts: httpd become: yes tasks: - name: be sure httpd is installed yum: name=httpd state=installed

- name: be sure httpd is running and enabled service: name=httpd state=started enabled=yes

target serves

tasks

Create hosts file- Location

- Anywhere you want. - Default: as you installed Ansible..

$ ansible --help Usage: ansible <host-pattern> [options] : -i INVENTORY, --inventory-file=INVENTORY specify inventory host file (default=/usr/local/etc/ansible/hosts) : $

$ cd TEST <— Your test Vagrant location TEST$ emacs hosts : TEST$ cat hosts [test-servers] 192.168.33.10 <— IP address of Your Vagrant server TEST$

Create playbook- Location

- Anywhere you want. (No Default)

$ cd TEST <— Your test Vagrant location TEST$ mkdir playbooks TEST$ cd playbooks TEST/playbooks$ emacs httpd.yml : TEST$ cat httpd.yml - hosts: httpd-server become: yes tasks: - name: be sure httpd is installed yum: name=httpd state=installed

- name: be sure httpd is running and enabled service: name=httpd state=started enabled=yes TEST$

Try your playbook1. check your network

- Anywhere you want. (No Default)

TEST$ ansible -i hosts all -m ping 192.168.33.50 | success >> { "changed": false, "ping": "pong" }

TEST$ ansible -i hosts httpd-server -m ping 192.168.33.50 | success >> { "changed": false, "ping": "pong" }

ssh troubles?Any Trouble? -> check your ssh configuration

TEST$ vagrant ssh-config : IdentityFile /XXXXXX/private_key : TEST$ ssh -i /XXXXXX/private_key vagrant@192.168.33.50

— ANY TROUBLE? —

1. remove information from .ssh/know_hosts 2. set ssh configuration to .ssh/config

Host 192.168.33.50 User vagrant TCPKeepAlive yes IdentityFile /XXXXXXX/private_key IdentitiesOnly yes ControlPersist 2h

Try your playbook (2)2. check your playbook

TEST$ ansible-playbook -i ./hosts playbooks/httpd.yml --syntax-check

playbook: playbooks/httpd.yml

TEST$ ansible-playbook -i ./hosts playbooks/httpd.yml --list-tasks

playbook: playbooks/httpd.yml

play #1 (httpd-server): TAGS: [] be sure httpd is installed TAGS: [] be sure httpd is running and enabled TAGS: []

air:nemo@~/TEST_STUDY$

— set sandbox —set sandbox to test many times

TEST$ vagrant sandbox status [default] Sandbox mode is off TEST$ vagrant sandbox on [default] Starting sandbox mode... 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% TEST$ vagrant sandbox status [default] Sandbox mode is on TEST$

Try your playbook (3)3. do your playbook

TEST$ ansible-playbook -i ./hosts playbooks/httpd.yml

PLAY [httpd-server] ***********************************************************

GATHERING FACTS *************************************************************** ok: [192.168.33.50]

TASK: [be sure httpd is installed] ******************************************** changed: [192.168.33.50]

TASK: [be sure httpd is running and enabled] ********************************** changed: [192.168.33.50]

PLAY RECAP ******************************************************************** 192.168.33.50 : ok=3 changed=2 unreachable=0 failed=0

TEST$

—- inside Virtual machine —- [vagrant@vagrant-centos65 init.d]$ ls /etc/init.d/httpd ls: cannot access /etc/init.d/httpd: No such file or directory [vagrant@vagrant-centos65 init.d]$

—- inside Virtual machine —- [vagrant@vagrant-centos65 init.d]$ ls /etc/init.d/httpd /etc/init.d/httpd [vagrant@vagrant-centos65 init.d]$

Insider Playbookplaybook : YAML file

- hosts: httpd-server become: yes tasks: - name: be sure httpd is installed yum: name=httpd state=installed

- name: be sure httpd is running and enabled service: name=httpd state=started enabled=yes

target servers - ‘hosts’ file

do with ‘sudo’Task : definition

name : descriptionTask itself

Inside Playbooktasks inside : Modules

yum: name=httpd state=installed

module Parameters

http://docs.ansible.com/ansible/modules.html http://docs.ansible.com/ansible/modules_by_category.html

— rollback sandbox —Rollback sandbox : back to server environment before install HTTPD

TEST$ vagrant sandbox rollback [default] Rolling back the virtual machine... 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% air:nemo@~/TEST_STUDY$

Set Ansible into VagrantfileVagrantfile

# -*- mode: ruby -*- : # Ansible config.vm.provision “ansible” do |ansible| ansible.playbook = “playbooks/httpd.yml" ansible.inventory_path = “./hosts” ansible.limit = “httpd-server” end : end

https://docs.vagrantup.com/v2/provisioning/ansible.html

set playbook

set inventory(hosts)

set terget server

TEST$ vagrant reload —-provision

Try : do Ansbile with Vagrant

TEST$ vagrant reload --provision ==> default: Attempting graceful shutdown of VM... : ==> default: Machine booted and ready! : ==> default: Running provisioner: ansible...

PLAY [httpd-server] ***********************************************************

GATHERING FACTS *************************************************************** ok: [192.168.33.50]

TASK: [be sure httpd is installed] ******************************************** changed: [192.168.33.50]

TASK: [be sure httpd is running and enabled] ********************************** changed: [192.168.33.50]

PLAY RECAP ******************************************************************** 192.168.33.50 : ok=3 changed=2 unreachable=0 failed=0

air:nemo@~/TEST_STUDY$

server has launched.

start Ansible tasks

Server setting was changed.

Task

Task

Server setting was changed.

Goal : Today’s archive

Server Apps

Apache

PHP

MySQL

Product Apps

Source

Data

Cron

Virtual server

Vagrant+ ansible+ fabric

automation

HomeworkA. Please learn ‘Modules’ of Ansible.

- Note) Use ‘Official document’ - http://docs.ansible.com/ansible/modules.html - http://docs.ansible.com/ansible/modules_by_category.html

- There are many useful ansible modules.

B. Please learn ‘Ansible Provisioner’ of Vagrant.

- Note) Use ‘Official document’ - https://docs.vagrantup.com/v2/provisioning/ansible.html

- There are many useful provisioner related to ansible.

Homework (2)C. Please make playbook of PHP/MySQL.

- currently, there is only httpd playbook.

HINTVagrantfile :

ansible.playbook = “playbooks/setup.yml” :

setup.yml ===== # setup httpd - include: playbooks/httpd.yml # setup mysql - include: playbooks/mysql.yml # setup php - include: playbooks/php.yml =====

Next : Ansible(2)

A) What’s Idempotence??

B) Make spec list. and use tarballs.