Debug School: Ranjith Kumar Ragupathi

What is Pods?

Ranjith Kumar Ragupathi — Fri, 21 Jul 2023 13:28:25 +0000

Pods are the smallest deployable computing units in Kubernetes, an open source system for container scheduling, orchestration and management.

How Kubernetes works?

Ranjith Kumar Ragupathi — Fri, 21 Jul 2023 13:28:12 +0000

Kubernetes is a platform for managing containerized applications. It does this by providing APIs that allow you to control and manage how your containerized applications are deployed, scaled, and organized. Kubernetes can be used on-premises or in the cloud and is currently the most popular platform for managing containerized applications.

Why We need Kubernetes?

Ranjith Kumar Ragupathi — Fri, 21 Jul 2023 13:27:58 +0000

Kubernetes is used to manage containers and load balancing for container management on single or multiple hosts.

What is Kubernetes?

Ranjith Kumar Ragupathi — Fri, 21 Jul 2023 13:27:42 +0000

Kubernetes automates operational tasks of container management.
It is used to deploying applications, rolling out changes to your applications, scaling your applications up and down to fit changing needs, monitoring your applications, and more—making it easier to manage applications.

Write a Ansible Playbook to install a package called “git”, “wget” and run some bash script.

Ranjith Kumar Ragupathi — Thu, 20 Jul 2023 13:22:40 +0000

root@ip-172-31-87-83:~# cat Playbook_script_Ranjith.yml

name: Install Git and Wget and Run Bash Script hosts: web become: yes # Run tasks with administrative privileges (sudo)

tasks:
- name: Install Git (for Debian/Ubuntu-based systems)
apt:
name: git
state: present
when: ansible_os_family == 'Debian' or ansible_os_family == 'Ubuntu'

- name: Install Wget (for Debian/Ubuntu-based systems)
  apt:
    name: wget
    state: present
  when: ansible_os_family == 'Debian' or ansible_os_family == 'Ubuntu'

Output:

root@ip-172-31-87-83:~# ansible-playbook -i inventory Playbook_script_Ranjith.yml -u ubuntu --key-file=node.pem -b

PLAY [Install Git and Wget and Run Bash Script] *************************************************************************************************************

TASK [Gathering Facts] **************************************************************************************************************************************
ok: [34.239.106.240]
ok: [54.89.178.94]
fatal: [10.1.1.1]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: connect to host 10.1.1.1 port 22: Connection timed out", "unreachable": true}
fatal: [10.22.2.2]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: connect to host 10.22.2.2 port 22: Connection timed out", "unreachable": true}

TASK [Install Git (for Debian/Ubuntu-based systems)] ********************************************************************************************************
ok: [34.239.106.240]
ok: [54.89.178.94]

TASK [Install Wget (for Debian/Ubuntu-based systems)] *******************************************************************************************************
ok: [34.239.106.240]
ok: [54.89.178.94]

PLAY RECAP **************************************************************************************************************************************************
10.1.1.1 : ok=0 changed=0 unreachable=1 failed=0 skipped=0 rescued=0 ignored=0
10.22.2.2 : ok=0 changed=0 unreachable=1 failed=0 skipped=0 rescued=0 ignored=0
34.239.106.240 : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
54.89.178.94 : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

root@ip-172-31-87-83:~#

What is the different between docker pause and unpause?

Ranjith Kumar Ragupathi — Tue, 18 Jul 2023 07:30:46 +0000

"Docker Pause" command will suspend the running process for specified container.
"Docker unpause" command will resume the process for the specified container.

What is Docker and why is it used?

Ranjith Kumar Ragupathi — Mon, 17 Jul 2023 15:26:43 +0000

Docker is container-based platforms.
Docker is used many companies due to its reliability, performance, and functionality.

What is DevSecOps?

Ranjith Kumar Ragupathi — Thu, 13 Jul 2023 16:02:01 +0000

DevSecOps is the methodology of integrating security testing at every stage of the software development process. DevSecOps collaboration between developers, security specialists, and operation teams.

How DevOps and SRE are different?

Ranjith Kumar Ragupathi — Thu, 13 Jul 2023 15:56:35 +0000

DevOps methodology is collaboration between software development team and operation team.

SRE focused reliability and availability. SRE engineers with operational and development skills.

What are the list of DevOps Tools?

Ranjith Kumar Ragupathi — Thu, 13 Jul 2023 15:50:51 +0000

Ansible
Github
Docker
AWS, Azure, Google cloud
Kubernetes
Splunk

What are the list of DevOps Tools?

Ranjith Kumar Ragupathi — Wed, 12 Jul 2023 15:54:50 +0000

Ansible
Github
Docker
AWS, Azure, Google cloud
Kubenetes
Splunk

What exactly do DevOps do?

Ranjith Kumar Ragupathi — Wed, 12 Jul 2023 15:50:38 +0000

DevOps helps to reduce the development cost
It helps to provide quality services
Speed up the development process