Prateek S.’s Post

🚀 Understanding Restart Policies in Kubernetes 🚀 Kubernetes restart policies are vital when it comes to controlling pod behavior Restart Policies: Always: - This ensures the restart of a container irrespective of its exit status. - It is best suited for running services that need to be up all the time. OnFailure: - This will only restart the container if it exits with a non-zero status. - It is great for batch jobs where you want retries to occur on failure. Never: - The container upon exiting never gets restarted, regardless of whether the exit status was good or bad. - Helpful in cases where you have one-time tasks and would like to handle failures manually. Key Points: - Pods: The value of restartPolicy determines the behavior for all containers in the Pod including init containers and sidecars - Init Containers: Normally they use Never or OnFailure but this could be set as Always, so that it can continue running as supporting services - Sidecar Containers: Usually they use Always hence they offer continuous support functions. #Kubernetes #DevOps #RestartPolicies

Elevate your debugging game with Runme – turn kubectl commands into documented procedures. Watch your Kubernetes issues unravel in the face of well-documented precision. 🚧🔍 #KubernetesOps #DevOps #Infrastructure

Evicted Pods means where a running pod is forcibly terminated & removed from a node by the #Kubernetes scheduler or node manager. It happens due to several reasons, like resource constraints or node issues. #k8s #Kubernetes #DevOps

Remember - the Kubernetes Control Plane is the brains of the operation. The Worker Nodes RUN workloads. The Control Plane lays the foundational ability to do so. For example, let’s take the Kubelet which is a component of the Worker Node. The Kubelet is an agent that has a few different jobs, but one job is to watch the API Server for new tasks. If the Kubelet can’t run the task, it reports back to the Control Plane, but it does not find another Node to run the workload on. It just says “hey Control Plane, I can’t run this task, find another Node”. Worker Nodes run the tasks and the Control Plane tells the Worker Nodes how to run the tasks. #kubernetes #devops #platformengineering

🚀 Kubernetes Troubleshooting: Container Image Pull Failures🚀 One frustrating issue in Kubernetes is when your pods fail to start due to Container Image Pull Failures. This can happen for a variety of reasons, including incorrect image names, authentication issues with private registries, or the image not being available. 💡 Troubleshooting Steps: 1. Check Pod Status with `kubectl get pods` to see which pods are failing. 2. View Pod Events with `kubectl describe pod <pod-name>` to check for image pull errors. 3. Verify Image Reference in your deployment to ensure the correct image name and tag. 4. Check Registry Access if using a private repository—make sure credentials are properly configured. Solving image pull issues can be tricky, but following these steps can help you get your containers running smoothly! Have you encountered any other Kubernetes deployment issues? Drop a comment, and let’s work through them together! ⬇️ #Kubernetes #DevOps #CloudComputing #Containerization #ImagePullError #TechTips #CI_CD #K8s #Containers

Kubernetes Deployments, StatefulSets, and DaemonSets 👇 First, they're all higher-level Controllers. What this means is instead of deploying a Pod by itself, it's managed by a higher-level Controller. The Controller gives the ability to have reconciliation loops, which confirm that the current state is the desired state of the workload. You may know this as "self-healing". Let's break down each: ✅ Deployments 1. The most common for stateless applications. 2. Self-healing capabilities. 3. Pretty common method of getting Pods deployed. 4. Use of ReplicaSets available. ✅ StatefulSets 1. Just like a Deployment, except for stateful workloads. 2. Ties a unique ID (network identifier) to each Pod. 3. If a Pod is deleted or shuts down, a new Pod comes up with the same unique ID as the old Pod. ✅ DaemonSets 1. Confirm that one Pod is running on each Worker Node. 2. No ReplicaSets. 3. If you have three Worker Nodes, that means you have three Pods (one on each Worker Node). #kubernetes #devops #platformengineering

Understanding Kubernetes CrashLoopBackOff and How to Fix It CrashLoopBackOff is a status in Kubernetes that signifies a Pod is stuck in a cycle of crashing and restarting. It's not an error itself but an indicator that something is amiss. This status occurs when a container within a Pod fails, prompting Kubernetes to continuously attempt restarts. If the failure persists, Kubernetes progressively increases the wait time between restarts. Common Causes of CrashLoopBackOff: - Configuration Issues: Small mistakes in configuration files can trigger crashes. - Resource Problems: Unavailable resources like a PersistentVolume can prevent Pod initialization. - Incorrect Arguments: Providing incorrect command-line arguments can lead to failures. - Application Bugs: Bugs or exceptions within the application can cause crashes. - Network and Permissions Issues: Bind attempts to a port already in use or low memory limits can cause problems too. How to Fix CrashLoopBackOff: 1. Check Pod Description: Use `kubectl describe pod <pod-name>` to view the Pod's state and reasons for failures. 2. View Logs: Check logs using `kubectl logs <pod-name> --all-containers` or `kubectl logs <pod-name> -c <container-name>` to identify issues. 3. Check Events: Run `kubectl get events` to review recent events associated with the Pod. 4. Inspect Deployment: Use `kubectl describe deployment <deployment-name>` to identify any misconfigurations affecting the Pod. #Kubernetes #CrashLoopBackOff #DevOps #Containerization #Troubleshooting

Spinning up a K8s Cluster is Easy. Managing K8s Reliability at Scale is HARD. Komodor ensures Continuous Kubernetes Reliability at scale by streamlining cluster maintenance, and proactively detecting risky trends on both the infra and pod layers. Let me know if you think otherwise ;) #kubernetes #devops #platformengineering #sre #

Lack of visibility could present potential risks when trying to reduce costs! Discover how Cynet Security gained insight into their Kubernetes environment and streamlined Kubernetes cost optimization with PerfectScale. https://hubs.la/Q02lbFSH0 #PerfectScale #Kubernetes #K8s #Devops #devopsengineer #SRE #platformengineering #finops #CTO #EKS #AKS #GKE #openshift

What is "CreateContainerConfigError" in Kubernetes?👨🏻💻 CreateContainerConfigError occurs when kubelet tries to create a container in a pod but fails before the container enters the Running state. Why this error occurs? This error occurs when a ConfigMap or Secret is missing. But how to identify whether the ConfigMap is missing or the Secret is missing? You can identify this by describing the pod. When you will describe the pod you will know what exactly is missing. How to fix this issue? To fix this issue, you have to create the ConfigMap or the Secret whichever is missing. Let me know if you were aware of this or not. #kubernetes #devops