Kubernetes
These are some notes on how to install Kubernetes...
Install Docker
sudo yum -y install docker-engine
sudo systemctl enable docker
sudo systemctl start docker
Install Kubernetes
sudo yum -y install kubeadm
Modify Firewall Rules
sudo firewall-cmd --add-masquerade --permanent
sudo firewall-cmd --add-port=10250/tcp --permanent
sudo firewall-cmd --add-port=8472/udp --permanent
#master node only:
sudo firewall-cmd --add-port=6443/tcp --permanent
sudo systemctl restart firewalld
sudo iptables -P FORWARD ACCEPT
Oracle Container Registry
From browser, login to container-registry.oracle.com, click 'Kubernetes' and accept the license.
sudo docker login container-registry.oracle.com/kubernetes
Username: jeff@mcdonald.net
Password: *********
Configure Kubernetes
sudo kubeadm-setup.sh up
Use 'down' to reset Kubernetes.
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
export KUBECONFIG=$HOME/.kube/config
echo 'export KUBECONFIG=$HOME/.kube/config' >> $HOME/.bashrc
To untain the master node so pods will run on it:
kubectl taint nodes --all node-role.kubernetes.io/master-
Enable Dashboard
To allow external dashboard access
kubectl create clusterrolebinding NAME --clusterrole=cluster-admin --user=system:anonymous
Create 'dashboard-adminuser.yaml'.
kubectl apply -f dashboard-adminuser.yaml
Browser Login:
To generate token for login:
kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Install Helm
Do not run as root!
curl -L https://git.io/get_helm.sh | bash
helm init