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minjae-song
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manifest/k8s_infra_installer.sh
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214
manifest/k8s_infra_installer.sh
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#!/bin/bash
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install_dir=$(dirname "$0")
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. ${install_dir}/k8s.config
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yaml_dir="${install_dir}/yaml"
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os_check=$(awk -F= '/^NAME/{print $2}' /etc/os-release)
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function set_env() {
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echo "========================================================================="
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echo "======================== set env for kubernetes ========================"
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echo "========================================================================="
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# centos
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if [[ ${os_check} == "\"CentOS Linux\"" ]]; then
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# disable firewall
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sudo systemctl disable firewalld
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sudo systemctl stop firewalld
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#swapoff
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sudo swapoff -a
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sudo sed s/\\/dev\\/mapper\\/centos-swap/#\ \\/dev\\/mapper\\/centos-swap/g -i /etc/fstab
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#selinux mode
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sudo setenforce 0
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sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
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#crio-kube set
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sudo modprobe overlay
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sudo modprobe br_netfilter
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sudo cat << "EOF" | sudo tee -a /etc/sysctl.d/99-kubernetes-cri.conf
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net.bridge.bridge-nf-call-iptables = 1
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net.ipv4.ip_forward = 1
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net.bridge.bridge-nf-call-ip6tables = 1
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EOF
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sudo sysctl --system
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# ubuntu
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elif [[ ${os_check} = "\"Ubuntu\"" ]]; then
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#swapoff
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sudo swapoff -a
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sudo sed s/\\/swap.img/#\ \\/swap.img/g -i /etc/fstab
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# others
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else
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sudo echo "This OS is not supported."
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sudo exit 100
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fi
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}
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function install_crio() {
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echo "========================================================================="
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echo "========================== start install crio =========================="
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echo "========================================================================="
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#centos
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if [[ ${os_check} == "\"CentOS Linux\"" ]]; then
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# install crio
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sudo yum install -y cri-o
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sudo systemctl enable crio
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sudo systemctl start crio
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# check crio
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sudo systemctl status crio
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rpm -qi cri-o
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# remove cni0
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sudo rm -rf /etc/cni/net.d/100-crio-bridge.conf
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sudo rm -rf /etc/cni/net.d/200-loopback.conf
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# edit crio config
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sudo sed -i 's/\"\/usr\/libexec\/cni\"/\"\/usr\/libexec\/cni\"\,\"\/opt\/cni\/bin\"/g' /etc/crio/crio.conf
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sudo sed -i 's/\#insecure\_registries = \"\[\]\"/\insecure\_registries = \[\"{imageRegistry}\"\]/g' /etc/crio/crio.conf
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sudo sed -i 's/\#registries = \[/registries = \[\"{imageRegistry}\"\]/g' /etc/crio/crio.conf
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sed -i 's/k8s.gcr.io/{imageRegistry}\/k8s.gcr.io/g' /etc/crio/crio.conf
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sed -i 's/registry.fedoraproject.org/{imageRegistry}/g' /etc/containers/registries.conf
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sudo sed -i "s|{imageRegistry}|${imageRegistry}|g" /etc/crio/crio.conf
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sudo sed -i "s|{imageRegistry}|${imageRegistry}|g" /etc/containers/registries.conf
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sudo systemctl restart crio
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elif [[ ${os_check} = "\"Ubuntu\"" ]]; then
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# install crio
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sudo apt-get -y install cri-o-${crioVersion}
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sudo systemctl enable crio.service
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sudo systemctl start crio.service
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# check crio
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sudo systemctl status crio
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# remove cni0
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sudo rm -rf /etc/cni/net.d/100-crio-bridge.conf
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sudo rm -rf /etc/cni/net.d/200-loopback.conf
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# edit crio config
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sudo systemctl restart crio
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# others
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else
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sudo echo "This OS is not supported."
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sudo exit 100
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fi
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}
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function install_kube() {
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echo "========================================================================="
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echo "======================= start install kubernetes ======================"
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echo "========================================================================="
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#install kubernetes
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if [[ -z ${k8sVersion} ]]; then
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k8sVersion=1.17.6
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else
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k8sVersion=${k8sVersion}
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fi
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if [[ -z ${apiServer} ]]; then
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apiServer=127.0.0.1
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else
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apiServer=${apiServer}
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fi
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if [[ -z ${podSubnet} ]]; then
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podSubnet=10.244.0.0/16
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else
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podSubnet=${podSubnet}
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fi
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# centos
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if [[ ${os_check} == "\"CentOS Linux\"" ]]; then
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#install kubernetes components
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sudo yum install -y kubeadm-${k8sVersion}-0 kubelet-${k8sVersion}-0 kubectl-${k8sVersion}-0
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sudo systemctl enable --now kubelet
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# ubuntu
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elif [[ ${os_check} = "\"Ubuntu\"" ]]; then
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#install kubernetes components
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sudo apt-get install -y kubeadm-${k8sVersion}-0 kubelet-${k8sVersion}-0 kubectl-${k8sVersion}-0
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sudo systemctl enable kubelet
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# others
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else
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echo "This OS is not supported."
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exit 100
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fi
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sudo echo '1' > /proc/sys/net/ipv4/ip_forward
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sudo echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables
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#change kubeadm yaml
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sudo sed -i "s|{k8sVersion}|v${k8sVersion}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|{apiServer}|${apiServer}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|{podSubnet}|\"${podSubnet}\"|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|{imageRegistry}|${imageRegistry}|g" ${yaml_dir}/kubeadm-config.yaml
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# kube init
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sudo kubeadm init --config=${yaml_dir}/kubeadm-config.yaml --upload-certs
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mkdir -p $HOME/.kube
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sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
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sudo chown $(id -u):$(id -g) $HOME/.kube/config
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echo "========================================================================="
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echo "====================== complete install kubernetes ===================="
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echo "========================================================================="
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}
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function uninstall() {
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kubeadm reset -f
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sudo sed -i "s|v${k8sVersion}|{k8sVersion}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|${apiServer}|{apiServer}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|\"${podSubnet}\"|{podSubnet}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo sed -i "s|${imageRegistry}|{imageRegistry}|g" ${yaml_dir}/kubeadm-config.yaml
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sudo rm -rf $HOME/.kube
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}
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function main(){
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case "${1:-}" in
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up)
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set_env
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install_crio
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install_kube
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;;
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delete)
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uninstall
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;;
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*)
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set +x
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echo " service list:" >&2
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echo " $0 up" >&2
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echo " $0 delete" >&2
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;;
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esac
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}
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main $1
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