DevOps

All my DevOps work will be submitted here.

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As per architecture We needed 3 machines, (EC2-A, EC2-B and EC2-C). EC2-A (redhat linux) will be having ansible installed on it. EC2-B will be used as a machine to install Jenkins tool. We will generate ssh key on EC2-A , without password and use it to connect to EC2-B machine.

Steps to Generate SSH key and adding it to remote server.

Steps:

1. Generate ssh key on EC2-A using command ssh-keygen -t rsa -C "name of the key/identifier". It will generate provate and public key at this location. ~/.ssh/.
2. Copy content of id_rsa.pub.
3. Login to remote machines EC2-B and EC2-C and go to location ~/.ssh/. open authorized_keys file in vi editor using command sudo vi authorized_keys and add content of public key into this file and save it.
4. Now you can test if these SSH keys are working for you. Go to EC2-A and run command ssh <ip_address of EC2-B/EC2-C>. If successful, then you're all set.

Steps to add Hosts in ansible file.

Steps:

1. Go to the client machine EC2-A, where ansible is installed.

2. change directory to /etc/ansible using command cd /etc/ansible.

3. Update hosts file using vi or nano editor and add following lines at the end of hosts file.

   [yodha]

   host1 ansible_ssh_host=

   host2 ansible_ssh_host=

4. Now, you need to test if you ansible machine can actually reach to other 2 machines. To do so, run following commenad.

   ansible -m ping all

5. If machines added successfully in hosts file, you will see success message after running ansible -m ping all like this.

   ec2-user:/etc/ansible $ ansible -m ping all
   The authenticity of host '34.221.214.11 (34.221.214.11)' can't be established.
   ECDSA key fingerprint is SHA256:Lhpx6Uushgqb6URqSfBkBriTA2O5ZHNCw+IawbaSzuU.
   ECDSA key fingerprint is MD5:3c:ad:98:a8:78:04:da:56:5f:b9:5e:14:b3:dd:82:16.
   Are you sure you want to continue connecting (yes/no)? yes
   host1 | SUCCESS => {
   "changed": false,
   "ping": "pong"
   }

   OR

   host2 | SUCCESS => {
   > "changed": false,
   > "ping": "pong"
   }
   host1 | SUCCESS => {
   > "changed": false,
   > "ping": "pong"
   }

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First time run of Ansible Playbook

ec2-user:~/environment/GIT/DevOps/ansible (master) $ ansible-playbook playbook_yodha1.yaml [DEPRECATION WARNING]: Instead of sudo/sudo_user, use become/become_user and make sure become_method is 'sudo' (default). This feature will be removed in version 2.6. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.

PLAY [yodha1_apache] ********************************************************************************************************************************************

TASK [Gathering Facts] ****************************************************************************************************************************************** ok: [host1]

TASK [Install apache packages] ********************************************************************************************************************************** ok: [host1]

TASK [ensure httpd is running] ********************************************************************************************************************************** ok: [host1]

PLAY [yodha1_jenkins] *******************************************************************************************************************************************

TASK [Gathering Facts] ****************************************************************************************************************************************** ok: [host2]

TASK [Install yum] ********************************************************************************************************************************************** changed: [host2]

TASK [Download jenkins.repo] ************************************************************************************************************************************ changed: [host2]

TASK [Import Jenkins Key] *************************************************************************************************************************************** changed: [host2]

TASK [Install Jenkins] ****************************************************************************************************************************************** changed: [host2]

TASK [Start & Enable Jenkins] *********************************************************************************************************************************** changed: [host2]

TASK [Sleep for 30 seconds and continue with play] ************************************************************************************************************** ok: [host2]

TASK [Get init password Jenkins] ******************************************************************************************************************************** ok: [host2]

TASK [Print init password Jenkins] ****************************************************************************************************************************** ok: [host2] => { "result.stdout": "pwd" }

PLAY RECAP ****************************************************************************************************************************************************** host1 : ok=3 changed=0 unreachable=0 failed=0
host2 : ok=9 changed=5 unreachable=0 failed=0

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