Patching a Kubernetes deployment involves making updates or changes to an existing deployment. This can be useful for various reasons, such as fixing bugs, applying security updates, introducing new features, or making configuration changes. Kubernetes provides several mechanisms to patch deployments, and the choice depends on the nature of the changes you want to make. […]
AKS
How to renew Kubernetes expired certificates?
How do you renew the kubernetes expired certificate? Kubernetes uses various certificates for secure communication within the cluster. These certificates are essential for securing communication between various components, such as API servers, kubelets, and etcd. Environment: root@kmaster1:~# kubectl version –shortClient Version: v1.22.0Server Version: v1.22.15root@kmaster1:~# Here are some of the important certificates used in Kubernetes: How […]
How do you create a first helm chart? Kubernetes Package Manager
Helm is a package manager for Kubernetes that allows you to define, install, and upgrade even the most complex Kubernetes applications. Helm is one of the most vital tools in DevOps. Kustomize is a built-in tool for Kubernetes that allows you to customize raw, template-free YAML files for multiple purposes, including managing multiple versions of […]
Kubernetes: How Blue-Green Deployment works?
Blue-green deployment involves simultaneously operating two application environments within a production cluster. In this deployment approach, the stable version of the application is deployed in the first environment (blue), while the new version is deployed in the second environment (green). By default, Kubernetes performs a rolling update of a deployment. As part of the rollout […]
Kubernetes – How to cleanup the failed pods from all namespaces ?
In the Kubernetes environment, we could often see that pods might fail due to various reasons. Most of the time, it could be related to config issues or capacity-related issues. In such conditions, you could see the pod status could be “pending”, “Crashloopbackoff”, “evicted”, “Failed”, “ContainerCannotRun”, “Error”, “ContainerCreating” etc. As a DevOps engineer, you need […]