Im new to Devops and im learning the Ansible as a beginner with AWS EC2 Ubuntu 16.04 LTS.
initially i have launched 2 EC2 instances with SSH port 22 open in security group, i named the instances as Master and Slave.
I ssh'ed into Master Instances when all is up and running. I will list steps one by one as follow
1. I created a user called ansible and issued password
ubuntu@ip-172-31-17-94:~$ sudo su
root@ip-172-31-17-94:/home/ubuntu# adduser ansible
Adding user `ansible' ...
Adding new group `ansible' (1001) ...
Adding new user `ansible' (1001) with group `ansible' ...
Creating home directory `/home/ansible' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for ansible
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
2. uncommented PermitRootLogin yes and PasswordAuthentication yes in /etc/ssh/sshd_config and restarted ssh
3.Changed the Visudo file adding root access to ansible user
root@ip-172-31-17-94:/home/ubuntu# visudo
edited
# User privilege specification
root ALL=(ALL:ALL) ALL
ansible ALL=(ALL:ALL) ALL
saved and closed
4.Generated ssh keygen
ansible@ip-172-31-17-94:~$ ssh-keygen -t rsa -b 4096
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ansible/.ssh/id_rsa):
Created directory '/home/ansible/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/ansible/.ssh/id_rsa.
Your public key has been saved in /home/ansible/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:wah0yD9Ngf7hzLIihkEFvNYjPNrzcLubNxGnqFKYrik ansible@ip-172-31-17-94
The key's randomart image is:
+---[RSA 4096]----+
|... .. |
| . o ..o . |
|. + +.o + |
| B + +ooo. |
|++o o.oOS. |
|= = o +.= |
|.+ * . + |
|Eo+ +.+ |
|=o .+= . |
+----[SHA256]-----+
5. Installing Ansible packages
$ sudo apt-get install software-properties-common
$ sudo apt-add-repository ppa:ansible/ansible
$ sudo apt-get update
$ sudo apt-get install ansible
Awesome!.. all is up and ansible is install in master server I issued a command to test the ansible
ansible@ip-172-31-17-94:~$ ansible --version
ansible 2.3.0.0
config file = /etc/ansible/ansible.cfg
configured module search path = Default w/o overrides
python version = 2.7.12 (default, Nov 19 2016, 06:48:10) [GCC 5.4.0 20160609]
6. Edited the /etc/ansible/hosts and added my slave server private ip (My ec2 are in same subnet in same availability zone ) so i used private Ip
[my]
172.31.29.197 .save and closed
7.ssh'ed in Slave Server and repeated the 1, 2 ,3 steps and logout
8.shh'ed into Master server
local@host $ shh ansible@<Master Ip>
9.Copying public Key to the Slave Server from Master server
ansible@ip-172-31-17-94:~$ ssh-copy-id 172.31.29.197
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/ansible/.ssh/id_rsa.pub"
The authenticity of host '172.31.29.197 (172.31.29.197)' can't be established.
ECDSA key fingerprint is SHA256:qOW0ZktetcpTNmxRsubxn1kcr8egyNmcA5Uk9+oWc7A.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
[email protected]'s password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh '172.31.29.197'"
and check to make sure that only the key(s) you wanted were added
ansible@ip-172-31-17-94:~$ ssh 172.31.29.197
Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-1013-aws x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
Get cloud support with Ubuntu Advantage Cloud Guest:
http://www.ubuntu.com/business/services/cloud
14 packages can be updated.
12 updates are security updates.
Last login: Sat Apr 22 06:27:15 2017 from 42.109.141.238
ansible@ip-172-31-29-197:~$ logout
Connection to 172.31.29.197 closed.
And successfully configured the Mater to Slave password-less ssh connection
Till then i haven't faced any issue.
when i issued a command Ansible -m ping all
i got an error
172.31.29.197 | FAILED! => {
"changed": false,
"failed": true,
"module_stderr": "Shared connection to 172.31.29.197 closed.\r\n",
"module_stdout": "/bin/sh: 1: /usr/bin/python: not found\r\n",
"msg": "MODULE FAILURE",
"rc": 0
}
later when i gooogled i got some chunks i followed listed step by the solution.
the solution is i repeated step no.5 from above list in slave server. when issued ansible -m ping from the Master server i got success Message
My question that how to install agent-less anible in a Slave, The main feature of ansible agent-less!
Help me if i missed any of step
