Kubernetes - Yuan's notes

How to install Kubernetes(kubeadm, kubectl & kubelet)?¶

Installation(Ubuntu 20.04)¶

apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get install -y kubelet kubeadm kubectl

apt-mark hold kubelet kubeadm kubectl

Ref: Installing kubeadm, kubelet and kubectl

Delete namespace¶

kubectl delete namespace {ns_name}

Terminating namespace couldn’t be deleted?¶

Solution#1¶

In one terminal:

kubectl proxy

In another terminal:

BTW, you need install jq.

kubectl get ns delete-me -o json | \
  jq '.spec.finalizers=[]' | \
  curl -X PUT http://localhost:8001/api/v1/namespaces/delete-me/finalize -H "Content-Type: application/json" --data @-

Solution#2¶

kubectl patch ns <your_namespace> -p '{"metadata":{"finalizers":null}}'

Reference¶

Ref#1: kubectl proxy & curl
Ref#2: kubectl patch