Kubernetes: Difference between revisions
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==Knowledge== | ==Knowledge== | ||
cat /proc/cgroups | |||
sudo apt install upx-ucl | |||
dpkg --print-architecture | |||
apt-cache madison kubelet | |||
apt-cache madison kubeadm | |||
apt-cache madison kubectl | |||
apt-cache madison docker-ce | |||
journalctl -u kubelet | |||
sudo rm -rf /root/.kube | |||
rm -rf /home/${USER}/.kube | |||
sudo rm -rf /etc/kubernetes | |||
sudo rm -rf /var/lib/kubelet | |||
sudo rm /etc/containerd/config.toml | |||
sudo systemctl daemon-reload | |||
systemctl restart containerd | |||
sudo systemctl restart docker | |||
sudo systemctl enable docker | |||
sudo ifup docker0 | |||
sudo ifdown docker0 | |||
sudo apt install netscript | |||
sudo systemctl restart NetworkManager | |||
sudo systemctl restart systemd-resolved | |||
sudo systemctl daemon-reload | |||
sudo apt purge docker-ce kubelet kubeadm kubectl | |||
sudo apt autoremove docker-ce kubelet kubeadm kubectl | |||
sudo apt-mark unhold docker-ce kubelet kubeadm kubectl | |||
<source lang="powershell"> | <source lang="powershell"> | ||
choco -v | choco -v | ||
Revision as of 12:05, 17 May 2022
Preferred Kubernetes environments are Minikube, Kind and K3s. It's depends on your use case.
- Minikube: Getting started with Fully Kubernetes environment
- Kind: Kubernetes environment for clusters and more than a single node
- K3s: Kubernetes environment for a low spec machine that uses fewer resources
| Nature | Minikube | Kind | K3s |
|---|---|---|---|
| Runtimes | VM |
Container |
Native
|
| CPU Architectures | AMD64 |
AMD64 |
AMD64, ARMv7, ARM64
|
| Container Runtimes | Docker, CRI-O, containerd, gvisor |
Docker |
Docker, containerd
|
| Startup Time | 5:19 / 3:15 |
2:48 / 1:06 |
0:15 / 0:15
|
| Memory | 2GB |
8GB (Windows, MacOS) |
512 MB
|
| Root Access Required | ✕ |
✕ |
✓
|
| Multi-Cluster | ✓ |
✓ |
✕
|
| Multi-Node | ✕ |
✓ |
✓
|
| Project Home | Minikube | Kind | K3s |
Install
Minikube
Get-ComputerInfo OsName,OsVersion,OsBuildNumber
choco install docker-desktop -y
choco install minikube -y
# minikube start --driver=hyperv
# minikube start --driver=none
minikube start
minikube delete
minikube start --v=7
kubectl get nodes
Kind
choco install kubernetes-cli -y
choco install kind -y
# kind create cluster
# kind delete cluster
kind create cluster --name k8s-ns12-pc04
# kind delete cluster --name k8s-ns12-pc04
kubectl cluster-info --context kind-k8s-ns12-pc04
cat <<EOF > kind-config.yaml
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
- role: worker
- role: worker
EOF
K3s
choco install multipass -y
multipass launch -n node1
multipass list
multipass set local.driver=hyperv
multipass set local.driver=virtualbox
Get-NetConnectionProfile
Set-NetConnectionProfile -InterfaceIndex 13 -NetworkCategory Private
multipass list
cat C:\Windows\System32\drivers\etc\hosts.ics
multipass delete --purge --all
multipass exec node1 -- bash -c "curl -sfL https://get.k3s.io | sh -"
multipass exec node1 -- sudo kubectl get nodes
Knowledge
cat /proc/cgroups sudo apt install upx-ucl dpkg --print-architecture
apt-cache madison kubelet apt-cache madison kubeadm apt-cache madison kubectl apt-cache madison docker-ce
journalctl -u kubelet
sudo rm -rf /root/.kube
rm -rf /home/${USER}/.kube
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm /etc/containerd/config.toml
sudo systemctl daemon-reload systemctl restart containerd sudo systemctl restart docker sudo systemctl enable docker
sudo ifup docker0 sudo ifdown docker0 sudo apt install netscript sudo systemctl restart NetworkManager sudo systemctl restart systemd-resolved
sudo systemctl daemon-reload sudo apt purge docker-ce kubelet kubeadm kubectl sudo apt autoremove docker-ce kubelet kubeadm kubectl sudo apt-mark unhold docker-ce kubelet kubeadm kubectl
choco -v
wsl -l -v
wsl --list --verbose
Restart-Service LxssManager
Get-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V
Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V
#Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
apt install -y conntrack
apt install -yqq daemonize dbus-user-session fontconfig
docker --help
docker version
kubectl proxy
kubectl --help
kubectl version
kubectl get nodes
kubectl cluster-info
kubectl cluster-info dump
kubectl cluster-info --context kind-kind
kubectl get all --all-namespaces
kubectl get all --namespace kubernetes-dashboard
kubectl patch node $NODENAME -p '{"metadata":{"finalizers":[]}}' --type=merge
kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')