Welcome to the fascinating world of Kubernetes, where managing and scaling applications becomes a streamlined process. If you’re just starting your journey into Kubernetes, you might find yourself surrounded by a sea of new terms and concepts. Today, we’re going to focus on two key players in the Kubernetes ecosystem: DaemonSets and ReplicaSets. These might …
David Cao
In Kubernetes, you cannot directly “stop” and then “start” a pod in the same way you might stop and start a virtual machine. Pods in Kubernetes are designed to be ephemeral and stateless entities, managed by higher-level controllers like Deployments, StatefulSets, or DaemonSets. The lifecycle of a pod is tied to the lifecycle of the …
You can effectively restart a pod in Kubernetes, but not in the same way you might restart a service on a traditional VM using a command like systemctl restart. Since Kubernetes manages pods based on desired states, you have to use Kubernetes operations to trigger a restart. Here are several methods to restart a pod: …
Deploying PostgreSQL in a Kubernetes (K8s) environment involves several steps, including creating a Deployment or StatefulSet for PostgreSQL, setting up persistent storage to ensure data durability, and configuring network access. Below is a detailed guide to get you started. Prerequisites A Kubernetes cluster kubectl command-line tool, configured to communicate with your cluster Basic understanding of …
In Kubernetes, when you deploy workloads using container images, the images are typically pulled from a container image registry specified in the deployment configuration. To check which image registry is being used by your containers in Kubernetes, you need to inspect the image field in the pod specifications of your deployments, stateful sets, daemon sets, …
Welcome to the world of Kubernetes, where managing applications becomes a breeze! If you’re new here, you might wonder what all the buzz is about. Think of Kubernetes like a magical tool that helps keep your app’s pieces running smoothly, just like a conductor in an orchestra. Today, we’re going to focus on two key …
To create a PostgreSQL pod in Kubernetes, you’ll need to define a pod configuration in a YAML file that specifies the PostgreSQL image and any necessary configurations such as environment variables for setting up the database. Create PostgreSQL pod in Kubernetes Here’s a basic guide to creating a PostgreSQL pod: Create a PostgreSQL Pod Configuration …
In Kubernetes, both Deployments and ReplicaSets are pivotal concepts that help manage the lifecycle of your applications by ensuring that a specified number of pod replicas are running at any given time. Understanding the differences between a Deployment and a ReplicaSet is crucial for effective Kubernetes management. ReplicaSet – maintain a stable set of replica …
When a Kubernetes pod is in a Pending state, it means that the pod has been accepted by the cluster, but it cannot be scheduled to run on any node. Several reasons could cause this, ranging from insufficient resources to scheduling constraints. 8 Reasons Why Kubernetes pod is in a Pending state Here’s a systematic …
To list all the containers running in a Kubernetes cluster, you would typically start by listing all Pods, as containers are encapsulated within Pods in Kubernetes. Each Pod can run one or more containers. Here’s how you can list all containers across all namespaces in a Kubernetes cluster: Using kubectl to list all the containers …