Ansible Notes

Create 2 instances and start them

Set up on ACM:

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Step1:

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go to vim /etc/ssh/sshd_config

i

scroll down

remove the # for password Authentication Yes

Add # for password Authentication No

:wq!

Step 2:

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Create password for ec2-user

# passwd ec2-user

Newpassword:

ConfirmPassword:

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Step 3:

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Add ec2-user in sudoers files and give all permission

# vim /etc/sudoers

i

scroll down

under root add like this

ec2-user ALL=NOPASSWD: ALL

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Step 4:

Restart your sshd connection

# systemctl restart sshd

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Repeat all the 4 steps on Host machine also and restart the sshd connection on host machine.

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Install Ansible :

Step 1:

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# yum list | grep ansible // you will not find ansible package as default in yum

So install epel replositories and it will ass ansible to yum repository

# yum install epel-release

// copy the command sudo amazon-linux-extras install epel and execute it

# sudo amazon-linux-extras install epel

give y

Complete!

You will ansible package is now available with yum

# yum list | grep ansible

//ansible will be available (wait for few seconds)

# yum install ansible

press y

again press y

Complete!

# ansible --version

version of ansible isntalled will be displayed.

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CREATE INVENTORY ON ACM and ADD Host details

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# vim /etc/ansible/hosts

Scroll down to end and add

[webservers]

paste private ip of host ==> 172.31.39.169

:wq!

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OPEN SECURE SHELL CONNECTION

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Step 1: change to ec2-user

# su - ec2-user

# ssh-keygen

press enter

press enter

press enter

ssh key will be generated

Step 2: copy key on to the host

# ssh-copy-id -i ec2-user@private ip of host

press yes

enter passowrd ==>

ssh connection will be done

In the message we will have a command to loginto the host from ACM, execute it

# ssh '[email protected]'

we will be connected to the host

exit

back to ACM

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Modules in ANSIBLE

1. adhoc ping command

# ansible -m ping webservers

response will be a pong from all hosts under webservers

Module2 : command

# ansible -m command -a "uptime" webservers

will give the uptime of hosts in webservers

To chekc all modules in ansible

# ansible-doc -l

use up arrow key and down arrow key to scroll up and down.

press q to exit

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Playbook2 -- For TomCat

# sudo vim playbook2.yml

i

---

- hosts: webservers

become: true

become_user: root

tasks:

- name: install tomcat

yum: name=tomcat state=present

- name: start tomcat

service: name=tomcat state=started

- name: deploy war file

get_url:

url=https://tomcat.apache.org/tomcat-7.0-doc/appdev/sample/sample.war

dest=/usr/share/tomcat/webapps

notify: restart tomcat

handlers:

- name: restart tomcat

service: name=tomcat state=restarted

Syntax check:

# ansible-playbook playbook1.yml --syntax-check

# ansible-playbook playbook1.yml

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playbook.yml (httpd) and deploy a html page

# sudo vim playbook.yml

i

---

- hosts: webservers

become: true

become_user: root

tasks:

- name: install httpd

yum: name=httpd state=present

- name: start httpd

service: name=httpd state=started

- name: deploy html file

copy: src=/etc/ansible/index.html dest=/var/www/html

notify: restart httpd

handlers:

- name: restart httpd

service: name=httpd state=restarted

:wq!

Check syntax

# ansible-playbook playbook.yml --syntax-check

Now run the playbook

# ansible-playbook playbook.yml

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docker deplyment

---

- hosts: webservers

become: true

become_user: root

tasks:

- name: install docker

yum: name=docker state=present

- name: start docker

service: name=docker state=started

- name: install git

yum: name=git state=present

- name: get the dockerfile from githib

git: repo=https://github.com/Sonal0409/dockerdemo.git dest=/tmp/gitrepo

- name: build dockerfile

command: chdir=/tmp/gitrepo docker build -t deployimage:ansible .

- name: run the dockerfile

command: docker run -itd -P deployimage:ansible

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