DevOpsCube

Kubernetes Swap When you deploy a Pod in Kubernetes, each node uses its physical RAM to run containers. If a node runs out of memory, Kubernetes may start killing Pods to keep the node stable. With kubernetes swap, you can avoid this by allowing the node to use a part of its disk as extra virtual memory. In our latest newsletter, we explained the following in detail. - How Kubernetes Swap Works - Key Use Cases for Swap - Pod QoS Classes and Swap Behavior - How Swap is Allocated for Pods - Hands-on: Testing Swap on Worker Nodes - Identifying Swap-Enabled Nodes using NFD. - Swap Observability Using Metrics 𝗥𝗲𝗮𝗱 𝗶𝘁 𝗛𝗲𝗿𝗲: https://lnkd.in/gwuGPWue Have you tried or used this feature? What was your use case? Let us know in the comments. #kubernetes #devops

Why does a running application suddenly slow down? If there are no code or hardware changes, the slowdown could be due to a page fault What is a page fault? A page fault is an event that happens when a program tries to access data from the RAM, but that data is not there. When this occurs, the operating system pauses the program, locates the required data on the disk, and loads it into RAM. If the RAM is already full, the OS moves some old data from RAM to disk to make space for the new data. Once done, the program continues running. When your system doesn’t have enough memory but you’re running multiple applications, the OS constantly swaps data between memory and disk, and that can slow down your app significantly. Have you ever debugged performance issues caused by memory paging? Share your experience or tips below 14,000+ DevOps engineers read our Devops newsletter 𝗝𝗼𝗶𝗻 𝗛𝗲𝗿𝗲 (𝗜𝘁𝘀 𝗳𝗿𝗲𝗲): https://lnkd.in/gZqQTHRy We send deep dives, practical tips, and guides straight to your inbox. #devops #linux

Want to try AWS services for free on your own computer? In AWS, we need to pay for every service we use. You will get some free limits for services for a limited amount of time, and that is only for new accounts. But, there is a free tool called LocalStack that allows us to test AWS services from our local machine using Docker. Also, not required any AWS account. Link: https://lnkd.in/ebjAQFTa Have you tried LocalStack yet? Comment below your experiences! #devopstools #devops

This Week in DevOpsCube👇 Get discounts, guides, use cases, & CKA Prep course practice tests! Don’t miss out! 🖥️ 𝗗𝗲𝘃𝗢𝗽𝘀 𝗕𝗹𝗼𝗴𝘀 & 𝗜𝗻𝘀𝗶𝗴𝗵𝘁𝘀 1. Linux Networking and Troubleshooting Commands - https://lnkd.in/g6Y27-dD 2. GitLab Architecture - https://lnkd.in/gkHciyeC 3. Kubectl Native Aliases with Kuberc - https://lnkd.in/gwcQsiek 4. Write-Ahead Log(WAL) - https://lnkd.in/g8HH7-J3 5. 28 Monitoring & observability Tools - https://lnkd.in/eET5XiXt 🎓 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 & 𝗗𝗶𝘀𝗰𝗼𝘂𝗻𝘁𝘀 CKA, CKAD, CKS aspirants! This months deal is live! Use code 𝗗𝗖𝗨𝗕𝗘𝟯𝟬 at https://kube.promo/devops to save up to 𝟯𝟴% 𝗢𝗙𝗙 on individual certifications. 👉 CKA course with 80+ practice questions: https://lnkd.in/gGbQ5vYf. Use code 𝗗𝗖𝗨𝗕𝗘𝟯𝟬 to get 𝟯𝟬% 𝗢𝗙𝗙 today 𝗧𝗵𝗶𝘀 𝗪𝗲𝗲𝗸'𝘀 𝗧𝗼𝗽 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗶𝗰𝗸👇 1. Kubernetes Swap Explained: https://lnkd.in/gwuGPWue Which resource are you diving into this week? Drop a comment! #DevOps #Learning #techtips

28 Monitoring & observability Tools Every DevOps Engineer Should Know🚀 Reports show that, Teams with strong observability spot issues way faster and bring downtime down by almost half. Enterprise-level Observability tools use AI and machine learning for, - Anomaly Detection - Predictive Maintenance - Root Cause Analysis - Enhanced Visualization and Insights - Security Monitoring, etc. We have put together a curated list o𝗳 28 tools. 𝗧𝗼𝗼𝗹𝘀 𝗟𝗶𝘀𝘁: https://lnkd.in/eET5XiXt Which tools from this list have you tried? #devops #devopstool

Most DevOps engineers focus on automation. But, DevOps today is much more than CI/CD pipelines. It is also about understanding how systems actually work and how to design them to survive failures. In that context, One concept that every DevOps engineer should know is the Write-Ahead Log (WAL). We recently shared a short post explaining how WAL works, with simple real-world examples. If you want to see how large-scale systems apply this concept in the real world, Netflix’s data platform is a great example. They have built their resilient data platform around the WAL principle for data durability even in case of failures. 👉 𝗥𝗲𝗮𝗱 𝗶𝘁 𝗛𝗲𝗿𝗲: https://lnkd.in/g8HH7-J3 14000+ DevOps engineers read our Devops newsletter. We send deep dives, practical tips, and guides straight to your inbox. Architecture Source: Netflix Tech blog (added in blog) #devops

This is the cleaner way to manage kubectl aliases Before Kubernetes v1.33, We had to manually add them inside .bashrc or .zshrc, mixing them with other shell configs. It was not a native or structured approach. Now, with kuberc, you can define all your kubectl aliases in a dedicated YAML file. It is clean, simple, and you can even version control it. We have created a complete hands-on guide to help you get started. 𝗗𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝗚𝘂𝗶𝗱𝗲: https://lnkd.in/gwcQsiek Have you tried kuberc yet? How are you managing your aliases? Share your setup or tips in the comments. #kubernetes #devops

Gitlab Architecture Explained🚀 In this beginners guide, You will learn the following: - Gitlab Core components - Storage of GitLab - High availability and scalability - Authentication and authorization - Monitoring Gitlab with prometheus and grafana. 𝗗𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝗚𝘂𝗶𝗱𝗲: https://lnkd.in/gkHciyeC PS. Do you use GitLab? If yes, share your experience! ♻️ If you find this useful, Repost with your network! #devops #gitlab

Lot of DevOps folks struggle with basic networking commands. In real-world production systems, knowing how to diagnose DNS failures, slow connections, or blocked ports is a must. Here is a quick cheat sheet 👇 - Website not reachable → use ping, curl, traceroute - Port blocked → use nc, ss -ltnp, iptables -L - DNS not resolving → use dig, resolvectl status - Slow connection → use mtr, iperf3, iftop Even though they look simple, These Linux network commands are part of every DevOps engineer’s daily toolkit. If you want to learn more, check out our full blog on Linux Networking and Troubleshooting Commands: 𝗥𝗲𝗮𝗱 𝗶𝘁 𝗛𝗲𝗿𝗲: https://lnkd.in/gn5WeAac What are your go-to commands for network troubleshooting? #devops #devopsengineer

This Week in DevOpsCube👇 Get discounts, guides, use cases, & CKA Prep course practice tests! Don’t miss out! 🖥️ 𝗗𝗲𝘃𝗢𝗽𝘀 𝗕𝗹𝗼𝗴𝘀 & 𝗜𝗻𝘀𝗶𝗴𝗵𝘁𝘀 1. Paging on OS - https://lnkd.in/gduTSAgv 2. AWS new upgrade on the EBS gp3 volumes - https://lnkd.in/gTF8eg-T 3. Common causes that slows down K8s API server - https://lnkd.in/gRmEUGGR 4. Load image into kind cluster - https://lnkd.in/g5GS_cYF 🎓 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 & 𝗗𝗶𝘀𝗰𝗼𝘂𝗻𝘁𝘀 CKA, CKAD, CKS aspirants! This months deal is live! Use code 𝗗𝗖𝗨𝗕𝗘𝟯𝟬 at https://kube.promo/devops to save up to 𝟯𝟴% 𝗢𝗙𝗙 on individual certifications. 👉 CKA course with 80+ practice questions: https://lnkd.in/gGbQ5vYf. Use code 𝗗𝗖𝗨𝗕𝗘𝟯𝟬 to get 𝟯𝟬% 𝗢𝗙𝗙 today 👉 𝗨𝗱𝗮𝗰𝗶𝘁𝘆: Get 50% OFF on all Udacity courses - https://lnkd.in/g8-TUZDw 𝗧𝗵𝗶𝘀 𝗪𝗲𝗲𝗸'𝘀 𝗧𝗼𝗽 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗶𝗰𝗸👇 1. MostAllocated k8s Scheduling Strategy (Case Study) - https://lnkd.in/gYFRt9GG Which resource are you diving into this week? Drop a comment! #DevOps #Learning #techtips