小白安装K8S Kubernetes集群 一起学

 

准备工作

安装系统

wget --no-check-certificate -qO InstallNET.sh 'https://raw.githubusercontent.com/leitbogioro/Tools/master/Linux_reinstall/InstallNET.sh' && chmod a+x InstallNET.sh

bash InstallNET.sh -alpine

reboot

22    root    LeitboGi0ro

挂载模式配置

mount --make-rshared /

修改主机名，主机解析

hostname_use=k8s-master

ipv4_address=$(curl -s ipv4.ip.sb)

echo "$hostname_use" > /etc/hostname 

hostname "$hostname_use"

cat > /etc/hosts << EOF

127.0.0.1 localhost

$ipv4_address $hostname_use

EOF

调整内核网桥参数加载生效

cat <<EOF >  /etc/sysctl.d/k8s.conf

net.bridge.bridge-nf-call-ip6tables = 1

net.bridge.bridge-nf-call-iptables = 1

net.ipv4.ip_forward=1

vm.max_map_count=262144

EOF

modprobe br_netfilter

sysctl -p /etc/sysctl.d/k8s.conf

alpine

安装docker和安装k8s部署工具

apk update && apk upgrade

apk add docker docker-compose kubelet kubeadm kubectl

rc-update add docker default

service docker start

rc-update add kubelet default

service kubelet start

KBS使用

初始化集群

kubeadm init

配置containerd 

containerd config default > /etc/containerd/config.toml

service containerd restart

配置kubectl

mkdir -p $HOME/.kube

cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

chown $(id -u):$(id -g) $HOME/.kube/config

安装calico网络cni插件

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

安装flannel网络cni插件

kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml

atest_version=$(curl -s https://api.github.com/repos/containernetworking/plugins/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")')

filename="cni-plugins-linux-amd64-${latest_version}.tgz"

curl -O -L "https://github.com/containernetworking/plugins/releases/download/${latest_version}/${filename}"

echo "Downloaded the latest version: ${filename}"

mkdir -p /opt/cni/bin

tar -C /opt/cni/bin -xzf $filename

ls /opt/cni/bin

卸载flannel

kubectl delete -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml

rm -rf /etc/cni/net.d/10-flannel.conflist

rm -rf /var/lib/cni/flannel

rm -rf /var/lib/cni/networks

查看pod列表信息

kubectl get pods -A

kubectl get pods -A -o wide

查看单个pod信息

kubectl describe pod coredns -n kube-system

kubectl describe pod calico-node-4rxkf -n kube-system

查看日志

kubectl logs coredns -n kube-system

删除pod

kubectl delete pod calico-node-4rxkf -n kube-system

查看node节点信息

kubectl get nodes

查看集群状态

kubectl get componentstatuses

生成加入命令

kubeadm token create --print-join-command

重启K8S

service kubelet restart