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Copy pathKubernetes_Cluster_Nodes_Setup.txt
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Kubernetes_Cluster_Nodes_Setup.txt
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# source: https://computingforgeeks.com/deploy-kubernetes-cluster-on-ubuntu-with-kubeadm/
# kubeadm - a CLI tool that will install and configure the various components of a cluster in a standard way.
# kubelet - a system service/program that runs on all nodes and handles node-level operations.
# kubectl - a CLI tool used for issuing commands to the cluster through its API Server.
# remove older docker version
sudo apt-get purge -y docker* containerd* runc && sudo apt autoremove -y
# setup your OS
sudo apt-get update && sudo apt-get install -y apt-transport-https gnupg2 curl gnupg-agent software-properties-common
# add google repository for docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
# add google repository for kubernetes
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee -a /etc/apt/sources.list.d/kubernetes.list
# disable firewall
systemctl stop ufw.service
systemctl disable ufw.service
# Disable local swap
sudo swapoff -a
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
# install kubernetes
sudo apt-get update && sudo apt install -y kubeadm kubectl kubelet
# Configure sysctl.
sudo modprobe overlay
sudo modprobe br_netfilter
sudo tee /etc/sysctl.d/kubernetes.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
sudo sysctl --system
# install the 19.03 version for kubernetes 1.20.2 # check the repository versions 'apt-cache madison docker-ce'
sudo apt-get update && sudo apt-get install -y docker-ce=5:19.03.14~3-0~ubuntu-focal docker-ce-cli=5:19.03.14~3-0~ubuntu-focal containerd.io
# change cgdriver to systemd (fix install error in kubeadm)
# Create required directories
sudo mkdir -p /etc/systemd/system/docker.service.d
# Create daemon json config file
sudo tee /etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
EOF
# Start and enable Services
sudo systemctl daemon-reload
sudo systemctl restart docker
sudo systemctl enable docker
# check docker installed version
docker --version
# check if the dicker service is enabled
systemctl status docker.service
# enable the docker service if its not enable
# systemctl enable docker.service
# reload and restart systemctl
# sudo systemctl daemon-reload
# sudo systemctl restart docker
# add node to kubernetes cluster host from the host setup
kubeadm join 192.168.50.71:6443 --token XXX \
--discovery-token-ca-cert-hash sha256:XXX
# check if kubectl service is running
sudo systemctl status kubelet.service
# keep packages from updating
sudo apt-mark hold docker-ce docker-ce-cli kubelet kubeadm kubectl
cat <<EOF | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.10/ /
EOF
cat <<EOF | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable:cri-o:1.20.list
deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/1.20/xUbuntu_20.04/ /
EOF
curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.10/Release.key | sudo apt-key --keyring /etc/apt/trusted.gpg.d/libcontainers.gpg add -
curl -L https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:1.20/xUbuntu_20.04/Release.key | sudo apt-key --keyring /etc/apt/trusted.gpg.d/libcontainers-cri-o.gpg add -
sudo apt-get update
sudo apt-get install cri-o cri-o-runc=1.19
sudo systemctl daemon-reload
sudo systemctl start crio
# fix error detected "cgroupfs" as the Docker cgroup driver. Create the .conf file to load the modules at bootup
cat <<EOF | sudo tee /etc/modules-load.d/crio.conf
overlay
br_netfilter
EOF
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF