K8s: Difference between revisions
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==K8s Lens== | |||
<syntaxhighlight lang="bash"> | |||
# install from snapcraft | |||
sudo snap install kontena-lens --classic | |||
# license version | |||
curl -fsSL https://downloads.k8slens.dev/keys/gpg\ | |||
| sudo gpg --dearmor -o /etc/apt/keyrings/k8slens.gpg | |||
cat << EOF | sudo tee /etc/apt/sources.list.d/k8slens.list >/dev/null | |||
deb [arch=$(dpkg --print-architecture)\ | |||
signed-by=/etc/apt/keyrings/k8slens.gpg]\ | |||
https://downloads.k8slens.dev/apt/debian stable main | |||
EOF | |||
sudo apt install lens | |||
lens-desktop | |||
</syntaxhighlight> | |||
==Kind== | ==Kind== | ||
{| | {| | ||
Line 30: | Line 49: | ||
{| | {| | ||
|valign='top'| | |valign='top'| | ||
< | <syntaxhighlight lang="properties"> | ||
cat <<EOF | kubectl apply -f - | cat <<EOF | kubectl apply -f - | ||
apiVersion: v1 | apiVersion: v1 | ||
Line 67: | Line 86: | ||
storageClassName: chorke-local-storage | storageClassName: chorke-local-storage | ||
EOF | EOF | ||
</ | </syntaxhighlight> | ||
|valign='top'| | |valign='top'| | ||
< | <syntaxhighlight lang="properties"> | ||
cat <<EOF | kubectl delete -f - | cat <<EOF | kubectl delete -f - | ||
apiVersion: v1 | apiVersion: v1 | ||
Line 107: | Line 126: | ||
storageClassName: chorke-local-storage | storageClassName: chorke-local-storage | ||
EOF | EOF | ||
</ | </syntaxhighlight> | ||
|- | |- | ||
Line 126: | Line 145: | ||
|} | |} | ||
==Storage== | |||
# Ceph RBD | |||
# GlusterFS | |||
# OpenEBS | |||
# Longhorn | |||
# Rook | |||
==Argo CD== | ==Argo CD== | ||
Line 176: | Line 202: | ||
kubectl get pods -A -o jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.image}{", "}{end}{end}' |sort | kubectl get pods -A -o jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.image}{", "}{end}{end}' |sort | ||
kubectl get pods -A -o jsonpath="{.items[*].spec.containers[*].image}" |tr -s '[[:space:]]' '\n' |sort |uniq -c | kubectl get pods -A -o jsonpath="{.items[*].spec.containers[*].image}" |tr -s '[[:space:]]' '\n' |sort |uniq -c | ||
kubectl delete pod academia-<hash> -n chorke --force --grace-period=0 | |||
kubectl delete pod academia-<hash> -n chorke | |||
kubectl get pod academia-<hash> -n chorke -o yaml | kubectl get pod academia-<hash> -n chorke -o yaml | ||
kubectl describe pod academia-<hash> -n chorke | kubectl describe pod academia-<hash> -n chorke | ||
kubectl edit pod academia-<hash> -n chorke | kubectl edit pod academia-<hash> -n chorke | ||
kubectl get pod academia-<hash> -n chorke | kubectl get pod academia-<hash> -n chorke | ||
kubectl logs academia-<hash> -n chorke | |||
kubectl get events -n chorke | |||
==Knowledge== | ==Knowledge== | ||
Line 191: | Line 221: | ||
|valign="top"| | |valign="top"| | ||
< | <syntaxhighlight lang='bash'> | ||
minikube addons enable default-storageclass | minikube addons enable default-storageclass | ||
minikube addons enable metrics-server | minikube addons enable metrics-server | ||
minikube addons enable metallb | minikube addons enable metallb | ||
</ | </syntaxhighlight> | ||
|valign="top"| | |valign="top"| | ||
< | <syntaxhighlight lang='bash'> | ||
minikube addons configure metallb | minikube addons configure metallb | ||
minikube addons enable olm | minikube addons enable olm | ||
minikube addons list | minikube addons list | ||
</ | </syntaxhighlight> | ||
|- | |- | ||
Line 229: | Line 259: | ||
| valign="top" | | | valign="top" | | ||
minikube addons enable ingress-dns | minikube addons enable ingress-dns | ||
nslookup academia | nslookup academia.local $(minikube ip) | ||
kubectl get configmap coredns -n kube-system -o yaml | kubectl get configmap coredns -n kube-system -o yaml | ||
Line 256: | Line 286: | ||
* [https://spacelift.io/blog/crashloopbackoff K8s » CrashLoopBackOff » Spacelift] | * [https://spacelift.io/blog/crashloopbackoff K8s » CrashLoopBackOff » Spacelift] | ||
* [https://www.blinkops.com/blog/troubleshooting-the-crashloopbackoff-error K8s » CrashLoopBackOff » Blinkops] | * [https://www.blinkops.com/blog/troubleshooting-the-crashloopbackoff-error K8s » CrashLoopBackOff » Blinkops] | ||
* [https://minikube.sigs.k8s.io/docs/handbook/addons/ingress-dns/ K8s » | * [https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/ K8s » DNS Service » Customizing] | ||
* [https://medium.com/kubernetes-tutorials/kubernetes-dns-for-services-and-pods-664804211501 K8s » DNS for Services and Pods] | |||
* [https://stackoverflow.com/questions/50952240/ K8s » Connect to Host Database] | |||
* [https://minikube.sigs.k8s.io/docs/handbook/addons/ingress-dns/ K8s » Minikube » Ingress DNS] | |||
* [https://www.keycloak.org/server/hostname K8s » Keycloak » Hostname] | * [https://www.keycloak.org/server/hostname K8s » Keycloak » Hostname] | ||
* [https://medium.com/@pczarkowski/kubernetes-tip-run-an-interactive-pod-d701766a12 K8s » Interactive Pod] | |||
* [https://spacelift.io/blog/restart-kubernetes-pods-with-kubectl K8s » Restart Pods] | |||
| valign="top" | | |||
* [https://microk8s.io/compare K8s » MicroK8s vs K3s vs Minikube] | |||
* [https://georgepaw.medium.com/how-to-run-the-cheapest-kubernetes-cluster-at-1-per-day-9287abb90cee K8s » Cheapest Cluster $1/Day] | |||
* [https://cert-manager.io/docs/ K8s » Ingress » Cert Manager] | |||
* [https://docs.k8slens.dev/getting-started/install-lens/ K8s » Lens » Getting Started] | |||
* [https://getbetterdevops.io/k8s-ingress-with-letsencrypt/ K8s » Ingress » Letsencrypt] | |||
* [https://github.com/MuhammedKalkan/OpenLens/releases K8s » OpenLens] | |||
* [https://microk8s.io/docs/getting-started K8s » MicroK8s] | |||
* [https://www.rancher.com/quick-start K8s » Rancher] | |||
* [https://min.io/docs/minio/kubernetes/upstream/index.html K8s » MinIO] | |||
* [https://github.com/lensapp/lens K8s » Lens] | |||
|- | |||
| colspan="3" | | |||
---- | |||
|- | |||
| valign="top" | | |||
* [https://itnext.io/deciphering-the-kubernetes-networking-maze-navigating-load-balance-bgp-ipvs-and-beyond-7123ef428572 K8s » Deciphering the Networking Maze] | |||
* [https://www.hostafrica.com/blog/new-technologies/install-kubernetes-cluster-windows-server-worker-nodes/ K8s » Windows Server Worker Nodes] | |||
* [https://aws.amazon.com/blogs/aws/introducing-karpenter-an-open-source-high-performance-kubernetes-cluster-autoscaler/ K8s » Introducing Karpenter] | |||
* [https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands K8s » Kubectl Command] | |||
* [https://kubernetes.io/docs/reference/kubectl/#resource-types K8s » Resource types] | |||
* [https://kubernetes.io/docs/reference/setup-tools/kubeadm/ K8s » Kubeadm] | |||
* [https://kubernetes.io/docs/reference/kubectl/ K8s » Kubeactl] | |||
* [https://kubernetes.io/docs/reference/networking/virtual-ips/ K8s » IPVS] | |||
* [https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/ K8s » CNI] | |||
| valign="top" | | |||
* [[K8s/CSI Hostpath Driver|K8s » CSI Hostpath Driver]] | |||
| valign="top" | | | valign="top" | |
Latest revision as of 09:01, 1 August 2024
K8s Lens
# install from snapcraft
sudo snap install kontena-lens --classic
# license version
curl -fsSL https://downloads.k8slens.dev/keys/gpg\
| sudo gpg --dearmor -o /etc/apt/keyrings/k8slens.gpg
cat << EOF | sudo tee /etc/apt/sources.list.d/k8slens.list >/dev/null
deb [arch=$(dpkg --print-architecture)\
signed-by=/etc/apt/keyrings/k8slens.gpg]\
https://downloads.k8slens.dev/apt/debian stable main
EOF
sudo apt install lens
lens-desktop
Kind
|
||
| ||
Volume
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: PersistentVolume
metadata:
name: chorke-pv
spec:
capacity:
storage: 10Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: chorke-local-storage
hostPath:
path: /home/shahed/.chorke/academia/var/k8s
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: k8s.io/minikube-hostpath
operator: In
values:
- node-hostname
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: chorke-pvc
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: chorke-local-storage
EOF
|
cat <<EOF | kubectl delete -f -
apiVersion: v1
kind: PersistentVolume
metadata:
name: chorke-pv
spec:
capacity:
storage: 10Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: chorke-local-storage
hostPath:
path: /home/shahed/.chorke/academia/var/k8s
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: k8s.io/minikube-hostpath
operator: In
values:
- node-hostname
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: chorke-pvc
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: chorke-local-storage
EOF
|
| |
| |
Storage
- Ceph RBD
- GlusterFS
- OpenEBS
- Longhorn
- Rook
Argo CD
kubectl create namespace argocd kubectl get namespace -A kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml kubectl get -n=argocd pod kubectl get -n=argocd service -n argocd kubectl port-forward -n=argocd service/argocd-server 8080:80 kubectl get -n=argocd -o=yaml secret argocd-initial-admin-secret echo RE83Uk81QTU5clZyLTlsdg== | base64 --decode https://localhost:8080/login
kubectl get -n=argocd configmap kubectl get -n=argocd deployment kubectl get -n=argocd service kubectl get -n=argocd secret kubectl get -n=argocd event kubectl get -n=argocd pod |
kubectl edit -n=argocd configmap argocd-rbac-cm kubectl edit -n=argocd configmap argocd-cm kubectl edit -n=argocd deployment argocd-redis kubectl edit -n=argocd service argocd-redis kubectl edit -n=argocd secret argocd-secret kubectl edit -n=argocd pod argocd-app-ctrl-0 |
kubectl get -n=argocd -o=yaml configmap argocd-rbac-cm kubectl get -n=argocd -o=yaml configmap argocd-cm kubectl get -n=argocd -o=yaml deployment argocd-redis kubectl get -n=argocd -o=yaml service argocd-redis kubectl get -n=argocd -o=yaml secret argocd-secret kubectl get -n=argocd -o=yaml pod argocd-app-ctrl-0 |
Docker Config
kubectl create secret -n chorke generic image-pull-secret --from-file=.dockerconfigjson=${HOME}/.docker/config.json --type=kubernetes.io/dockerconfigjson kubectl get secret -n chorke image-pull-secret -o "jsonpath={.data.\.dockerconfigjson}" | base64 --decode kubectl get secret -n chorke image-pull-secret -o yaml kubectl delete secret -n chorke image-pull-secret
kubectl get pods -A -o jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.image}{", "}{end}{end}' |sort kubectl get pods -A -o jsonpath="{.items[*].spec.containers[*].image}" |tr -s 'space:' '\n' |sort |uniq -c
kubectl delete pod academia-<hash> -n chorke --force --grace-period=0 kubectl delete pod academia-<hash> -n chorke
kubectl get pod academia-<hash> -n chorke -o yaml kubectl describe pod academia-<hash> -n chorke kubectl edit pod academia-<hash> -n chorke kubectl get pod academia-<hash> -n chorke kubectl logs academia-<hash> -n chorke kubectl get events -n chorke
Knowledge
snap services maas snap services juju snap services lxd |
minikube addons enable default-storageclass
minikube addons enable metrics-server
minikube addons enable metallb
|
minikube addons configure metallb
minikube addons enable olm
minikube addons list
|
| ||
kubectl exec -it <pod-nmae-hash> -- bash kubectl exec -it <pod-name-hash> -n <ns> -- bash kubectl exec -it <pod-name-hash> -n <ns> -- printenv |
kubectl logs <pod-nmae-hash> kubectl logs <pod-nmae-hash> -n <ns> kubectl logs <pod-nmae-hash> -n <ns> -p |
minikube addons enable ingress kubectl get pods -n ingress-nginx kubectl logs <pod-nmae-hash> -c <image-name> -n <ns> |
| ||
minikube addons enable ingress-dns nslookup academia.local $(minikube ip) kubectl get configmap coredns -n kube-system -o yaml |
References
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