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DevOps & Cloud (AWS, AZURE, GCP) Tech Free Learning
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Here’s a handy list of essential Kubernetes commands to streamline your workflow and boost your productivity. Save this post for quick reference!
# Check cluster info
kubectl cluster-info
# Get all nodes
kubectl get nodes
# Describe a node
kubectl describe node <node-name>
# Check cluster health
kubectl get componentstatuses
# List all namespaces
kubectl get namespaces
# Create a namespace
kubectl create namespace <namespace-name>
# Delete a namespace
kubectl delete namespace <namespace-name>
# List all pods in the default namespace
kubectl get pods
# List pods in a specific namespace
kubectl get pods -n <namespace>
# Describe a pod
kubectl describe pod <pod-name>
# Delete a pod
kubectl delete pod <pod-name>
# List all deployments
kubectl get deployments
# Create a deployment
kubectl create deployment <deployment-name> --image=<image-name>
# Update a deployment
kubectl set image deployment/<deployment-name> <container-name>=<new-image>
# Scale a deployment
kubectl scale deployment <deployment-name> --replicas=<number>
# Delete a deployment
kubectl delete deployment <deployment-name>
# List all services
kubectl get services
# Create a service
kubectl expose deployment <deployment-name> --type=<type> --port=<port>
# Describe a service
kubectl describe service <service-name>
# Delete a service
kubectl delete service <service-name>
# List all ConfigMaps
kubectl get configmaps
# Create a ConfigMap
kubectl create configmap <configmap-name> --from-literal=<key>=<value>
# List all Secrets
kubectl get secrets
# Create a Secret
kubectl create secret generic <secret-name> --from-literal=<key>=<value>
# List all persistent volumes
kubectl get pv
# List all persistent volume claims
kubectl get pvc
# Create a persistent volume
kubectl apply -f <persistent-volume-definition>.yaml
# Create a persistent volume claim
kubectl apply -f <persistent-volume-claim-definition>.yaml
# View logs of a pod
kubectl logs <pod-name>
# View logs of a specific container in a pod
kubectl logs <pod-name> -c <container-name>
# Stream logs of a pod
kubectl logs -f <pod-name>
# Get events
kubectl get events
# Describe a resource
kubectl describe <resource-type> <resource-name>
# Exec into a pod
kubectl exec -it <pod-name> -- /bin/bash
# List custom resource definitions
kubectl get crd
# Describe a custom resource
kubectl describe crd <custom-resource-name>
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If you take out the tools, there are generic role specific requirements that companies will expect from you once you are onboard.
Keeping it simple, there are 4 levels for a DevOps role in IT.
- Collaborate with developers and IT staff to manage code releases.
- Assist in automating processes to improve efficiency.
- Implement and maintain CI/CD pipelines.
- Monitor system performance and troubleshoot issues.
- Assist in the design and implementation of infrastructure as code (IaC).
- Manage and improve CI/CD pipelines.
- Automate operational processes.
- Implement and manage monitoring and logging solutions.
- Collaborate with development and operations teams to ensure smooth deployment and operation of systems.
- Troubleshoot and resolve issues in development, test, and production environments.
- Implement and manage containerization and orchestration technologies (e.g., Docker, Kubernetes).
- Lead and mentor junior members of the DevOps team.
- Architect and design highly available and scalable systems.
- Evaluate new technologies and tools to improve the DevOps process.
- Develop and implement best practices for infrastructure automation and configuration management.
- Collaborate with other teams to improve overall system reliability and performance.
- Define the overall DevOps strategy for the organization.
- Lead large-scale infrastructure and automation projects.
- Drive innovation and continuous improvement within the DevOps team.
- Act as a subject matter expert for DevOps practices and technologies.
- Collaborate with executive leadership to align DevOps initiatives with business goals.
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DevOps is a rapidly growing field that combines software development and operations, enabling organizations to deliver high-quality software at a faster pace. So, let's explore the key skills you need to master on your journey to becoming a DevOps Engineer:
Cloud platforms like AWS, Azure, and GCP are revolutionizing the IT landscape.
Remember, becoming a DevOps Engineer is an ongoing journey. Stay curious, keep learning, and embrace new technologies and practices as they emerge. Engage in open-source projects, attend conferences, and connect with fellow professionals to expand your network and stay up-to-date.
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- All Git/GitHub Content with use cases
- Git Realtime scenarios
- All Git/GitHub Exercises with solutions
- No More Git PDFs needed
- Easy to Learn from anywhere
- Detailed Explanation guide
- All Git/GitHub Branching Strategies for DevOps guy
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As I've delved into Kubernetes, I've found that monitoring tools are indispensable in maintaining the health and performance of clusters. Tools like Prometheus, elasticsearch, and Jaeger play a crucial role in metrics collection, logging, and tracing, ensuring that every part of the cluster runs smoothly.
By mastering these tools, Kubernetes admins can maintain robust and reliable applications.
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- Deployment manifest files
- Jenkins deployments & configurations
- Kubernetes Ingress files
- Realtime projects manifest files
- Helm charts for any application
- End to End Manifest files for any applications
- Includes AWS ELK Stack (Elasticsearch, Logstash, Kibana)
- Network service configurations templates
- Application monitoring templates for any applications
- Complete application launch manifest files for Realtime projects
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HAPPY LEARNING
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If you are planning to use this repo for learning, please hit the star.
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DEV Community
The Role of Programming and Coding in DevOps: An In-Depth Guide for DevOps Engineers
Introduction In the evolving world of IT, DevOps has emerged as a game-changer, bridging...
Whether you’re just starting out in DevOps or you’re a seasoned pro looking to level up your skills, this guide will provide you with the knowledge you need to succeed in today’s fast-paced tech landscape.
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docker run command do not conflict with existing ports in use on your host system.docker system prune command.docker logs <container_name> to check the container logs for error messages that can help diagnose the problem.-v flag in docker run or docker-compose.--cpu and --memory flags when running containers.Please open Telegram to view this post
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𝟭. 𝗴𝗶𝘁 𝗺𝗲𝗿𝗴𝗲 𝘃𝘀 𝗴𝗶𝘁 𝗿𝗲𝗯𝗮𝘀𝗲:
- 𝘨𝘪𝘵 𝘮𝘦𝘳𝘨𝘦 combines branch changes with new merge commits
- 𝘨𝘪𝘵 𝘳𝘦𝘣𝘢𝘴𝘦 moves branch changes on top, creating a linear history
𝟮. 𝗴𝗶𝘁 𝗿𝗲𝘀𝗲𝘁 𝘃𝘀 𝗴𝗶𝘁 𝗿𝗲𝘃𝗲𝗿𝘁:
- 𝘨𝘪𝘵 𝘳𝘦𝘴𝘦𝘵 undoes changes and moves the branch pointer, discarding subsequent commits
- 𝘨𝘪𝘵 𝘳𝘦𝘷𝘦𝘳𝘵 creates new undo commits, preserving history
𝟯. 𝗴𝗶𝘁 𝗳𝗲𝘁𝗰𝗵 𝘃𝘀 𝗴𝗶𝘁 𝗽𝘂𝗹𝗹:
- 𝘨𝘪𝘵 𝘧𝘦𝘵𝘤𝘩 downloads remote changes without auto-merging
- 𝘨𝘪𝘵 𝘱𝘶𝘭𝘭 fetches and auto-merges remote changes
In short,
DevOps is the most happening and integral part of almost all organizations.
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Jira: Agile project management tool aiding project management, workflows, and bug tracking.
Git: Open-source version control system facilitating collaboration and nonlinear workflows. GitHub extends its collaborative features.
Jenkins: Java-based, open-source tool supporting CI and CD with customizable workflows, easy installation, and numerous plugins.
Selenium: Open-source automated testing framework supporting web app automation across multiple browsers and OS.
Bamboo: Server-based tool tightly integrated with Jira, excelling in complex build plans and parallel testing.
Docker (container management): Packages and executes distributed apps, encouraging collaboration via Docker Hub.
Ansible (configuration management): Automates configuration management and infrastructure orchestration.
Jira Service Management: Centralizes feedback from diverse sources for improved communication.
Parlor: Engages with users to collect real-time contextual insights, integrating with various business tools.
Prometheus: Open-source performance monitoring database enabling robust reporting and visualization.
Opsgenie: Manages incidents, predicts and resolves service disruptions, integrates with various monitoring and communication tools, ensuring appropriate notifications and automated escalations for critical issues.
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If you want to become a Certified Kubernetes Administrator, or you want to become an EXPERT in Kubernetes, learn Kubernetes from scratch and understand everything, this repo is a good choice.
1. Kubernetes
2. Helm
3. Operator
4. Prometheus
5. EKS
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DEV Community
DevOps for Beginners: A Complete Roadmap to Get Started
Introduction The tech landscape is evolving rapidly, and DevOps has emerged as a crucial methodology...
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Tools and frameworks will change. Fundamentals remain intact.
Without fundamentals, you are incomplete.
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