vault backup: 2025-08-23 01:21:38

This commit is contained in:
falsfour 2025-08-23 01:21:38 +02:00
parent cabf03e8e3
commit 352feb730c
2 changed files with 10 additions and 7 deletions

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@ -205,17 +205,20 @@
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@ -39,8 +39,11 @@ Earn IBM Fullstack developer certificate (but afte)
- `kubectl describe pod myapp-pod` - `kubectl describe pod myapp-pod`
- `kubectl run redis --image=redis123 --dry-run=client -o yaml > redis.yaml` create yaml specification file for a pod - `kubectl run redis --image=redis123 --dry-run=client -o yaml > redis.yaml` create yaml specification file for a pod
- `kubectl get replicaset` and `kubectl get replicacontroller` - `kubectl get replicaset` and `kubectl get replicacontroller`
- - `kubectl scale --replicas=6 -f replicaset-definition.yml` better than `kubectl scale --replicas=6 replicaset myapp-replicaset` because latter only modifies deployed definition and not source file
- `kubectl apply -f replicaset-definition.yml`
- `kubectl get all` (lists deployment, then replicaset, then pods)
- 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 - 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
- deployment: recreate (all down, then all new up) vs rollingUpdate (default, scales down/up replicasets by one at a time). `kubectl rollout undo deployment/myapp-deployment` will roll back
- minikube: bundles master node programs and node programs on one machine. requires virtualization (via hypervisor KVM, VirtualBox... or docker but latter is not recommended) - 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 - ctr: CLI for containerD, not very user friendly and mostly for debugging
- It is advised to use nerdctl instead - It is advised to use nerdctl instead