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Prerequisites for Setup Kubenetes Cluster. You should install these things on each server.
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#!/bin/bash | |
## Generic installation on all nodes | |
sysctl -w net.ipv4.ip_forward=1 | |
sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g' /etc/sysctl.conf | |
sudo sysctl -p /etc/sysctl.conf | |
swapoff -a | |
sed -i '2s/^/#/' /etc/fstab | |
apt-get update | |
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 -y docker-ce | |
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 | |
systemctl daemon-reload | |
systemctl restart docker | |
systemctl enable docker | |
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 install kubernetes-cni -y # not in documentation needed for updates | |
apt-get install kubelet kubeadm kubectl -y | |
apt-mark hold kubelet kubeadm kubectl | |
systemctl daemon-reload | |
systemctl restart kubelet | |
## Create Default Audit Policy | |
mkdir -p /etc/kubernetes | |
cat > /etc/kubernetes/audit-policy.yaml <<EOF | |
apiVersion: audit.k8s.io/v1beta1 | |
kind: Policy | |
rules: | |
- level: Metadata | |
EOF | |
# folder to save audit logs | |
mkdir -p /var/log/kubernetes/audit | |
## Install NFS Client Drivers | |
sudo apt-get update | |
sudo apt-get install nfs-common |
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