---
id: temporary
aliases: []
tags:
  - default
created: "2025-07-20"
language: English
summary: Temporary notes that are not integrated yet
---
PDF Gear, add to overall IT vault

Führerschein PRO app
shoockygames@gmail.com 
P4th0f3xile?

Sro Golang Projekt verstehen und aufsetzen. Ferdoran bei github

For a weak, dont do things you know are vad and do things you know are good for you

Learn traffic rules
Earn IBM Fullstack developer certificate (but afte)

- Suggested IDE: vscode
	- YAML extension by Red Hat, configure in the extension settings the YAML schema and set this in the settings.json: `"yaml.schemas": {

        "kubernetes": "*.yaml"

    }`
	- restart the IDE afterwards
- kubectl
	- `kubectl run nginx --image=nginx` will fetch the nginx image from docker hub and create a pod
	- `kubectl create deployment nginx --image=nginx` creates a deployment
	- `kubectl create -f pod-definition.yml` create from file (`kubectl apply -f file.yml` works too?)
	- `kubectl get pods`
	- `kubectl describe pod myapp-pod`
- scaling: we create additional pods. a pod can contain multiple containers but one pod shall only contain what is necessary for one instance of the application. we do NOT create additional containers in the same pod
- minikube: bundles master node programs and node programs on one machine. requires virtualization (via hypervisor KVM, VirtualBox... or docker but latter is not recommended)
- ctr: CLI for containerD, not very user friendly and mostly for debugging
	- It is advised to use nerdctl instead
- nerdctl: provides docker-like CLI for containerd, supports docker compose, supports newest features in containerD (encrypted container images, lazy pulling...)
- crictl: provides a CLI for CRI-compatible container runtimes, installed separately, used to inspect and debug container runtimes (not to create containers ideally), works across different runtimes
	- `crictl pods` shows pods
	- `crictl --runtime endpoint` enables you to specify a runtime endpoint (or use CONTAINER_RUNTIME_ENDPOINT env var)
	- other commands are similar to docker

Kubernetes definition file:
```yml
apiVersion: v1
kind: Pod
metadata:  //dictionary, can only have name and labels
	name: myapp-pod
	labels: // can have any sub-attributes
		app: myapp
spec:  //individual for all deployments
  containers:
    - name: nginx-container
      image: nginx
```

## Glossary
- CRI: Container Runtime Interface
	- Kubernetes originally only worked for Docker but then introduced the CRI to be more abstract and allow all sorts of container runtimes
- OCI: Open Container Initiative
	- imagespec: specification on how an image should be build
	- runtimespec: standards on how a container runtime shall be deployed