install_kubernetes-1.9.7-calico.sh

# Install Kubernetes Cluster

# Targets: Master + Workers

# Prepare system
# Disable SELinuw
setenforce 0
sed -i 's/^SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config

# Disable Swap
swapoff `cat /etc/fstab | grep swap | awk '{print $1}'`
sed -i 's/^\([^#].*swap.*\)$/#\1/g' /etc/fstab
mount -a

# Enable IPv4 Forwarding
sed -i 's/^\(net.ipv4.ip_forward\).*/\1 = 1/g' /etc/sysctl.conf
sysctl -p
cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

# Install Docker CE 17.03
yum install -y yum-utils
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y --setopt=obsoletes=0 \
  docker-ce-17.03.2.ce-1.el7.centos \
  docker-ce-selinux-17.03.2.ce-1.el7.centos
systemctl enable docker
systemctl start docker
systemctl status docker

# Install Kubernetes 1.9.7
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=0
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
yum install -y kubelet-1.9.7 kubeadm-1.9.7 kubectl-1.9.7
# Configuration for K8s 1.9.7
sed -i 's/^\(Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=\).*/\1cgroupfs"/g' /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet
systemctl status kubelet



# Targets: Master

# Create K8s Cluster with network 10.244.0.0/16 : internal docker network scope
kubeadm init --pod-network-cidr 10.244.0.0/16
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

# Install Network : Calico
kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/hosted/etcd.yaml
kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/rbac.yaml
kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/hosted/calico.yaml

# Allow deploying pods on Master Node. Beware! Not in Production!
kubectl taint nodes --all node-role.kubernetes.io/master-

# Print Jion CMD to run on Workers (see cmd below)
kubeadm token create --print-join-command



# Targets: Workers

# Join K8s Nodes to Cluster : command given through 'kubeadm init'
kubeadm join --token b26bb6.e040d60287e35dc7 192.168.248.166:6443 --discovery-token-ca-cert-hash sha256:0a7dfc557cc247b630ec20e58e3f367f53c27b1411d491542a9395ba2dc48e3a