KodeKloud Engineer

Hi folks 👋

• This repository is my journey at KodeKloud Engineer, my solutions will be updated here.
• I also updated the way to solve Linux problems, instead of doing some boring Linux commands, my solution will solve it by leveraging Ansible

Ranking

• Update 24/09/2023: Promoted to Senior DevOps Engineer

SSH commands

Service Name	Command
Nautilus App 1	ssh [email protected]
Nautilus App 2	ssh [email protected]
Nautilus App 3	ssh [email protected]
Nautilus HTTP LBR	ssh [email protected]
Nautilus DB Server	ssh [email protected]
Nautilus Storage Server	ssh [email protected]
Nautilus Backup Server	ssh [email protected]
Nautilus Mail Server	ssh [email protected]
Jenkins Server for CI/CD	ssh [email protected]

SSH to server with sshpass

sudo yum install sshpass -y

Server Name	Purpose	Command
stapp01	Nautilus App 1	sshpass -p Ir0nM@n ssh -o StrictHostKeyChecking=no [email protected]
stapp02	Nautilus App 2	sshpass -p Am3ric@ ssh -o StrictHostKeyChecking=no [email protected]
stapp03	Nautilus App 3	sshpass -p BigGr33n ssh -o StrictHostKeyChecking=no [email protected]
stlb01	Nautilus HTTP LBR	sshpass -p Mischi3f ssh -o StrictHostKeyChecking=no [email protected]
stdb01	Nautilus DB Server	sshpass -p 'Sp!dy' ssh -o StrictHostKeyChecking=no [email protected]
ststor01	Nautilus Storage Server	sshpass -p Bl@kW ssh -o StrictHostKeyChecking=no [email protected]
stbkp01	Nautilus Backup Server	sshpass -p H@wk3y3 ssh -o StrictHostKeyChecking=no [email protected]
stmail01	Nautilus Mail Server	sshpass -p Gr00T123 ssh -o StrictHostKeyChecking=no [email protected]
jenkins	Jenkins Server for CI/CD	sshpass -p 'j@rv!s' ssh -o StrictHostKeyChecking=no [email protected]

Getting Started

Jump server information

• Jumphost: CentOS 8

  • user: thor
  • password: mjolnir123

• Nautilus App Servers: CentOS 7

How to solve Linux problems

• Clone the repository: git clone https://github.com/ntheanh201/kodekloud-engineer.git
• Go to folder: cd kodekloud-engineer
• Install Ansible: ./install_ansible.sh
• Solve Linux tasks by running Ansible playbook

Test environment

ansible-playbook -i test-environments curriculum/<module_name>/<task>/<level>/solution.yaml

Nautilus environment

ansible-playbook -i environments curriculum/<module_name>/<task>/<level>/solution.yaml

Curriculum

Linux (automated with Ansible)

• See: Linux

Level 1

• Linux Timezones Setting
• Linux User Expiry
• Linux User with Non-interactive Shell
• Linux User Without Home
• Linux File Permissions
• Selinux Installation
• Linux Run Levels
• Disable Root Login
• Linux NTP Setup
• Web Server Security
• Setup SSL for Nginx
• Create a group
• Create a user
• Linux Access Control List
• Linux User Files
• Linux Remote Copy
• Cron schedule deny to users
• Linux Firewalld Rules
• Linux Resource Limits

Level 2

• Create a Cron Job
• Linux Postfix Troubleshooting
• Linux String Substitute
• MariaDB Troubleshooting
• Linux Services
• Linux Banner
• Linux Collaborative Directories
• DNS Troubleshooting
• Linux SSH Authentication
• Linux Find Command
• Linux LogRotate
• Linux Configure sudo
• Install a package
• Linux GPG Encryption
• Configure Local Yum repos
• Linux Bash Scripts
• Application Security
• Add Response Headers in Apache
• Install Ansible
• Linux Firewalld Setup
• Linux Postfix Mail Server
• Install and Configure HaProxy LBR
• Haproxy LBR Troubleshooting
• Apache Troubleshooting

Level 3

• Apache Redirects

Kubernetes

• See: Kubernetes

Level 1

• Create Pods in Kubernetes Cluster
• Create Deployments in Kubernetes Cluster
• Create Namespaces in Kubernetes Cluster
• Set Limits for Resources in Kubernetes
• Rolling Updates in Kubernetes
• Rollback a Deployment in Kubernetes
• Create Replicaset in Kubernetes Cluster
• Create Cronjobs in Kubernetes
• Countdown job in Kubernetes
• Kubernetes Time Check Pod
• Troubleshoot Issue With Pods
• Update an Existing Deployment in Kubernetes
• ReplicationController in Kubernetes
• Fix Issue with VolumeMounts in Kubernetes

Level 2

• Kubernetes Shared Volumes
• Kubernetes Sidecar Containers
• Deploy Nginx Web Server on Kubernetes Cluster
• Print Environment Variables
• Rolling Updates And Rolling Back Deployments in Kubernetes
• Deploy Jenkins on Kubernetes
• Deploy Grafana on Kubernetes Cluster
• Deploy Tomcat App on Kubernetes Cluster
• Deploy Node App on Kubernetes Cluster
• Troubleshoot Deployment issues in Kubernetes
• Fix issue with LAMP Environment in Kubernetes

Level 3

• Deploy Apache Web Server on Kubernetes Cluster
• Deploy LAMP Stack on Kubernetes Cluster
• Init Containers in Kubernetes
• Persistent Volumes in Kubernetes
• Manage Secrets in Kubernetes
• Environment Variables in Kubernetes
• Kubernetes LEMP Setup
• Kubernetes Troubleshooting
• Deploy Iron Gallery App on Kubernetes
• Fix Python App Deployed on Kubernetes Cluster

Level 4

• Deploy Redis Deployment on Kubernetes
• Deploy MySQL on Kubernetes
• Kubernetes Nginx and PhpFPM Setup
• Deploy Drupal App on Kubernetes
• Deploy Guest Book App on Kubernetes

Ansible

• See: Ansible

Level 1

• Ansible Basic Playbook
• Ansible Inventory Update
• Ansible Config File Update
• Ansible Copy Module
• Ansible File Module

Level 2

• Ansible Ping Module Usage
• Ansible Install Package
• Ansible Archive Module
• Ansible Unarchive Module
• Ansible Blockinfile Module

Level 3

• Creating Soft Links Using Ansible
• Managing ACLs Using Ansible
• Ansible Manage Services
• Ansible Lineinfile Module
• Ansible Replace Module

Level 4

• Ansible Facts Gathering
• Ansible Create Users and Groups
• Managing Jinja2 Templates Using Ansible
• Ansible Setup Httpd and PHP
• Using Ansible Conditionals

Docker

• See: Docker

Level 1

• Install Docker Package
• Run a Docker Container
• Docker Delete Container
• Docker Copy Operations
• Docker Container Issue

Level 2

• Pull Docker Image
• Docker Update Permissions
• Create a Docker Image From Container
• Docker EXEC Operations
• Write a Docker File

Level 3

• Create a Docker Network
• Docker Volumes Mapping
• Docker Ports Mapping
• Save, Load and Transfer Docker Image
• Write a Docker Compose File

Level 4

• Resolve Dockerfile Issues
• Resolve Docker Compose Issues
• Deploy an App on Docker Containers
• Docker Node App
• Docker Python App

Git

• See: Git

Level 1

• Git Install and Create Bare Repository
• Git Clone Repositories
• Git Fork a Repository
• Git Repository Update
• Git Delete Branches

Level 2

• Git Install and Create Repository
• Git Create Branches
• Git Merge Branches
• Git Manage Remotes
• Git Revert Some Changes

Level 3

• Git Cherry Pick
• Manage Git Pull Requests
• Git hard reset
• Git Clean
• Git Stash

Level 4

• Git Rebase
• Manage Git Repositories
• Resolve Git Merge Conflicts
• Git Hook
• Git Setup from Scratch

Jenkins

• See: Jenkins

Level 1

• Jenkins Installation
• Jenkins Plugins
• Jenkins Create Users
• Jenkins Folders
• Jenkins Install Packages

Level 2

• Jenkins Views
• Jenkins Parameterized Builds
• Jenkins Workspaces
• Jenkins Database Backup Job
• Jenkins Scheduled Jobs

Level 3

Cloud (AWS) - Coming Soon

Cloud (Azure) - Coming Soon

Cloud (GCP) - Coming Soon

Projects - Coming Soon