installtion.txt

Install Docker Engine
---------------------

# 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 >/etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
# apt-get update
# apt-get install -y kubelet kubeadm kubectl 
# apt-mark hold kubelet kubeadm kubectl 

Install Docker packages
---------------------------

# apt-get update && apt-get install apt-transport-https ca-certificates curl software-properties-common -y

# curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -

# add-apt-repository \
  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) \
  stable"

# apt-get update && apt-get install docker-ce=18.06.2~ce~3-0~ubuntu -y

# cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF

# mkdir -p /etc/systemd/system/docker.service.d

# Restart docker.
# systemctl daemon-reload
# systemctl restart docker


# mkdir -p $HOME/.kube
# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
# sudo chown $(id -u):$(id -g) $HOME/.kube/config
# kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr=192.168.0.0/16
# export kubever=$(kubectl version | base64 | tr -d '\n')
# kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever"

verify:

# kubectl get nodes
# kubectl get pods --all-namespaces
# kubectl get nodes --show-lables
# kubectl get namespaces

Recreate tokens:
---------------
# kubeadm token create --print-join-command


Manual token create and add policy:
----------------------------------

#kubeadm token list
#kubeadm token create
#openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null |  openssl dgst         -sha256 -hex | sed 's/^.* //'


# kubeadm join --token <token> <master-ip>:6443 --discovery-token-ca-cert-hash sha256:<hash>



kubectl command handling Methods:


file update

# kubectl apply -f [filename.yaml]

all namespace pods view
------------------------

# kubectl get pods --all-namespaces

# kubectl create namespace twitter
# kubectl get all -n twitter
# kubectl get all -n twitter



#kubectl version
#kubectl cluster-info
#kubectl get pods -n kube-system
#kubectl get events