Kubernetes Exam

kube-exam.sh

# Shortcut commands
alias k=kubectl
alias kgn='kubectl get ns'

alias kgp='kubectl get pods'
alias kgs='kubectl get service'
alias kgd='kubectl get deployment'

alias kep='kubectl edit pod'
alias ked='kubectl edit deployment'
alias kes='kubectl edit service'

# set default namespace 
alias ksn='kubectl config set-context --current --namespace'


# journalctl
journalctl -u kube-apiserver
journalctl -u kubelet


# Static Pods

## Option-01
### updating the kubelet service configuration file and adding parameter --manifest= to yaml file

vi /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

# and add --manifest-url=

### example
echo `
[Unit]
Wants=docker.socket

[Service]
ExecStart=
ExecStart=/var/lib/minikube/binaries/v1.21.2/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --config=/var/lib/kubelet/config.yaml --container-runtime=docker --hostname-override=minikube --kubeconfig=/etc/kubernetes/kubelet.conf --node-ip=192.168.99.105 --manifest-url=https://gist.githubusercontent.com/rezamt/6e0b1b1b2fea42317ff420d11654fa69/raw/4f2f023223e8484de6fd6480b9721b3590201248/webpod.yaml

[Install]` > 

systemctl reload kubelet
systemctl restart kubelet




# Option 02 - check the path inside the kubelet/config.yaml
grep ^staticPodPath /var/lib/kubelet/config.yaml

# result: staticPodPath: /etc/kubernetes/manifests

# now just add your static config yaml under folder  /etc/kubernetes/manifests.
systemctl restart kubelet

# All api-server, scheduler, controller, kubelet configuration when you setup using kubeadm can be found under:

/etc/kubernetes/manifests

https://github.com/ohmyzsh/ohmyzsh/blob/master/plugins/kubectl/kubectl.plugin.zsh