Articles by Rahul Shivalkar
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Use Node Affinity in Kubernetes
Author: Rahul Shivalkar • Tags: cloud, linux • Comments: 0 • Published: Sep 30, 2020Node affinity in Kubernetes is conceptually similar to nodeSelector -- it allows us to limit which nodes our pod is eligible to be scheduled on, based on labels on the node.
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Configmaps in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Sep 17, 2020In this article, we will see two examples to access data from configmaps in Kubernetes. In one example we will use config maps as environment variables in the pod command and in the other we will populate a volume with data stored in a ConfigMap
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Create a Daemonset in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Sep 10, 2020A DaemonSet ensures that all nodes run a copy of a Pod. Normally, the node that a Pod runs on is selected by the scheduler but DaemonSet pods are created and scheduled by the DaemonSet controller.
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Static pods in Kuberentes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Sep 01, 2020Static Pods are managed directly by the kubelet and the API server does not have any control over these pods. The kubelet is responsible to watch each static Pod and restart it if it crashes.
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Role-based access control (RBAC) in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Aug 18, 2020In this article, we will understand the basics of RBAC and create Role, ClusterRole, RoleBinding and ClusterRoleBinding Objects. We will then create a kubeconfig file to give limited access to a particular user on a selected namespace.
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Limit Ranges in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Aug 11, 2020In this article, we will create a limit range and see how to set minimum and maximum values for the CPU resources used by Containers and Pods. We will see different scenarios with Limit and Request on the CPU.
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Network Policy in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Aug 05, 2020By default, pods accept traffic from any source. A network policy helps to specify how a group of pods can communicate with each other and other network endpoints.
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Storage in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Aug 04, 2020Data cannot be stored in the pod, when the pod is deleted or is terminated the data within it does not stay on the system. To provide long-term and temporary storage to Pods in the cluster, Kubernetes provides different types of storage mechanisms.
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Cheat Sheet for Kubernetes Commands
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Jul 30, 2020While working on Kubernetes it is very important that you know at least the basic commands. In this article, you will find the commands which are needed most of the time while working on the cluster.
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Jobs in Kubernetes
Author: Rahul Shivalkar • Tags: cloud • Comments: 0 • Published: Jul 28, 2020A job creates one or more Pods to perform a particular operation and ensures the pods successfully terminate. When a specified number of pods successfully complete, the job is complete. When a job is deleted, it deletes the Pods it created. A Job can also be used to run multiple Pods in parallel.
