Kubernetes

Kubernetes I*n* Docker (KI*n*D)

• #BUG: enable mermaid

graph LR
  image([image]) --> |used by|container
  subgraph pod
    direction TB
    container
  end

• #BUG: enable mermaid

graph LR

  subgraph deployment
    direction TB

    subgraph pod
      container
    end

  end

We can easily create a cluster using
kubernetes-kind-cluster.

To create simple (trivial) resources you can use
kubectl directly. For a complete
example look at kubernetes-create-simple-resource{.interpreted-text
role="ref"}.

Alternative --- Install minikube

• Follow the instructions in minikube
  start

• Download minikube.exe

New-Item -Path 'c:\' -Name 'minikube' -ItemType Directory -Force
Invoke-WebRequest -OutFile 'c:\minikube\minikube.exe' -Uri 'https://github.com/kubernetes/minikube/releases/latest/download/minikube-windows-amd64.exe' -UseBasicParsing

• Add the executable to your path

$oldPath = [Environment]::GetEnvironmentVariable('Path', [EnvironmentVariableTarget]::User)
if ($oldPath.Split(';') -inotcontains 'C:\minikube'){ `
  [Environment]::SetEnvironmentVariable('Path', $('C:\minikube;{0}' -f $oldPath), [EnvironmentVariableTarget]::User) `
}

• Reload your path. The easiest way is to stop and start your terminal
  again.

If you use VS Code do not use Developer: Reload Window. You will
need to close and open the full application.

The same applies to other tools like JetBrains products if you use
them.

Get-Command minikube

Output:

CommandType     Name                                               Version    Source
-----------     ----                                               -------    ------
Application     minikube.exe                                       0.0.0.0    C:\minikube\minikube.exe

Kubernetes CPU limits

How to start a Pod

kubectl run nginx --image=nginx

How to delete a Pod

kubectl delete pod nginx

How to get a Pod

kubectl get pod nginx