kubernetes-installation/kube-cluster-worker-install.sh

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2021-10-12 18:11:44 +07:00
#!/bin/bash -e
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echo "Downloading kubectl..."
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
echo "Installing kubectl..."
sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
chmod +x kubectl
mkdir -p ~/.local/bin/kubectl
mv ./kubectl ~/.local/bin/kubectl
echo "Verify kubectl client version"
kubectl version --client
echo "Downloading and install helm3..."
curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
echo "Setup network k8s module..."
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system
echo "Downloading and install CNI plguins..."
CNI_VERSION="v0.8.2"
ARCH="amd64"
sudo mkdir -p /opt/cni/bin
curl -L "https://github.com/containernetworking/plugins/releases/download/${CNI_VERSION}/cni-plugins-linux-${ARCH}-${CNI_VERSION}.tgz" | sudo tar -C /opt/cni/bin -xz
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DOWNLOAD_DIR=/usr/local/bin
sudo mkdir -p $DOWNLOAD_DIR
echo "Downloading and install crictl tools..."
CRICTL_VERSION="v1.17.0"
ARCH="amd64"
curl -L "https://github.com/kubernetes-sigs/cri-tools/releases/download/${CRICTL_VERSION}/crictl-${CRICTL_VERSION}-linux-${ARCH}.tar.gz" | sudo tar -C $DOWNLOAD_DIR -xz
echo "Downloading and install kubeadm and kubelet..."
RELEASE="$(curl -sSL https://dl.k8s.io/release/stable.txt)"
ARCH="amd64"
cd $DOWNLOAD_DIR
sudo curl -L --remote-name-all https://storage.googleapis.com/kubernetes-release/release/${RELEASE}/bin/linux/${ARCH}/{kubeadm,kubelet}
sudo chmod +x {kubeadm,kubelet}
echo "Setting up kubelet service..."
RELEASE_VERSION="v0.4.0"
curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service
sudo mkdir -p /etc/systemd/system/kubelet.service.d
curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
echo "Enabling kubelet service..."
sudo systemctl enable --now kubelet
echo "Verify kubeadm version..."
kubeadm version
echo "Downloading and setup docker, containerd and tools..."
sudo swapoff -a
curl -s -L https://sh.osa.cubetiqs.com/docker-setup.sh | bash
sudo systemctl start docker
sudo systemctl enable docker
echo "Enabling docker daemon for cgroup driver with systemd"
cat <<EOF | sudo tee /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
EOF
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echo "Restart docker service..."
sudo systemctl daemon-reload
sudo systemctl restart docker
echo "Installing socat and conntrack for kubernetes cluster..."
sudo apt-get -y install socat conntrack
echo "Install nfs client tools..."
sudo apt install nfs-common -y
echo "Setting up containerd and configuration..."
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
sudo modprobe overlay
sudo modprobe br_netfilter
# Setup required sysctl params, these persist across reboots. (If using crio)
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# Apply sysctl params without reboot
sudo sysctl --system
sudo mkdir -p /etc/containerd
containerd config default | sudo tee /etc/containerd/config.toml
sudo systemctl restart containerd
echo "Create directory and config in $HOME/.kube"
mkdir -p $HOME/.kube
touch $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
chmod o-r $HOME/.kube/config
chmod g-r $HOME/.kube/config
echo "Finished installation for kubectl, kubeadm and kubelet and some required tools, and now you do cluster :)!"