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Setting up your first pod

This guide is how we can create our first pod. I will be pulling latest postgres image (required for my project) but you can use any image you like.

Prerequisites:​

  1. You must have docker installed and running on your system. If you don't know how to do that yet, then you are at the wrong place 🙂.
  2. Kind (kubenetes in docker): Installation guide: Kind is a tool that will help us to run a local kubernetes cluster. It uses Docker containers as cluster nodes.
  3. Kubectl.

Steps:​

1. Pull postgres image​

docker pull postgres:16
docker images // to verify whether you have the postgres image

2. Create a new cluster with kind​

kind create cluster --name my-cluster
kubectl cluster-info
kubectl get nodes

3. Load image into Kind​

Since Kind uses its own docker nodes, we need to load the image into Kind.

kind load docker-image postgres:16 --name my-cluster

// verify that the image exists
docker exec -it my-cluster-control-plane crictl images // basically you are going inside the the control plane and checking whether images got loaded

Note:

  • Once we go inside the my-cluster-control-plane node we can not longer use docker commands.
  • Because docker is not the container runtime inside kubernetes node.
  • Container is the container runtime in kubernetes node.
  • crictl is the tool designed specifically for inspecting and debugging kubernetes

4.​