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requirements.sh
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requirements.sh
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#!/bin/bash
echo "[TASK 1] update hosts"
echo '192.168.10.100 master master' | tee -a /etc/hosts
init=2
stop=$1+1
for (( c=$init; c<=$stop; c++ ))
do
worker="$(($c-1))"
echo "192.168.10.$c worker$worker worker$worker" | tee -a /etc/hosts
done
echo "[TASK 2] Install docker"
export DEBIAN_FRONTEND=noninteractive
apt-get install apt-transport-https ca-certificates curl software-properties-common -y
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - >/dev/null 2>&1
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
apt-get update -y
apt-cache policy docker-ce
apt-get install docker-ce -y
# add ccount to the docker group
usermod -aG docker vagrant
# Enable docker service
echo "[TASK 3] Enable and start docker service"
cat > /etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
EOF
systemctl enable docker >/dev/null 2>&1
systemctl daemon-reload
systemctl restart docker
# Add sysctl settings
echo "[TASK 4] Add sysctl settings"
cat >>/etc/sysctl.d/kubernetes.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system >/dev/null 2>&1
# Disable swap
echo "[TASK 5] Disable SWAP"
sed -i '/swap/d' /etc/fstab
swapoff -a
# Install apt-transport-https pkg
echo "[TASK 6] Installing apt-transport-https pkg"
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 - >/dev/null 2>&1
# Add he kubernetes sources list into the sources.list directory
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
ls -ltr /etc/apt/sources.list.d/kubernetes.list
apt-get update -y
# Install Kubernetes
echo "[TASK 7] Install Kubernetes kubeadm, kubelet and kubectl 1.17.3"
apt-get install -y kubelet=1.17.3-00 kubeadm=1.17.3-00 kubectl=1.17.3-00
# Start and Enable kubelet service
echo "[TASK 8] Enable and start kubelet service"
systemctl enable kubelet >/dev/null 2>&1
systemctl start kubelet >/dev/null 2>&1