一、安装要求
1.CPU内核>=2
2.内存>=2G
3.Docker与kubernetes版本匹配
二、安装前配置
1.分别设置计算机名
Hostnamectl set-hostname –static master Hostnamectl set-hostname –static worker1 Hostnamectl set-hostname –static worker2
2.分别配置每台服务器的HOST文件
vim /etc/hosts 192.168.137.20 master 192.168.137.21 worker1 192.168.137.22 worker2
3.分别配置静态IP
cd /etc/sysconfig/network-scripts
vim ifcfg-enp0s3
4.安装依赖
yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstatlibseccomp wget vim net-tools git iproute lrzsz bash-completion tree bridge-utils unzip bind-utils gcc
5.关闭防火墙，禁用交换区, 关闭selinux
System stop firewalld System disable fillwalld Swapoff -a Setenforce 0 sed -i '/swap/s/^\(.*\)$/#\1/g' /etc/fstab sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
#查看结果
getenforce
6.调整内核参数
cat > kubernetes.conf <<EOF net.bridge.bridge-nf-call-iptables=1 net.bridge.bridge-nf-call-ip6tables=1 net.ipv4.ip_forward=1 net.ipv4.tcp_tw_recycle=0 vm.swappiness=8 vm.overcommit_memory=1 vm.panic_on_oom=0 fs.inotify.max_user_instances=8192 fs.inotify.max_user_watches=1048576 fs.file-max=52706963 fs.nr_open=52786963 net.ipv6.conf.all.disable_ipv6=1 net.netfilter.nf_conntrack_max=2310728 EOF
cp kubernetes.conf /etc/sysctl.d/kubernetes.conf sysctl -p /etc/sysctl.d / kubernetes.conf
7.调整文件数
echo "* soft nofile 65536">> /etc/security/limits.conf echo "* hard nofile 65536">> /etc/security/limits.conf
8.开启IPVS前置条件
cat > /etc/sysconfig/modules/ipvs.modules <<EOF # ! /bin/bash modprobe -- ip_vs modprobe -- ip_vs_rr modprobe -- ip_vs_wrr modprobe -- ip_vs_sh modprobe -- nf_conntrack_ipv4 EOF chmod 755 /etc/sysconfig/modules/ipvs.modules&&bash /etc/sysconfig/modules/ipvs.modules &&lsmod |grep -e ip_vs -e nf_conntrack_ipv4
9.配置docker
cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": [
"https://lebkn7ykm.mirror.aliyuncs.com",
"https://docker.mirrors.ustc.edu.cn",
"http://f1361db2.m.daocloud.io"，
"https://registry.docker-cn.com"
]，
"exec-opts": ["native.cgroupdriver=systemd"]，
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
}，
"storage-driver": "overlay2"
}
EOF
三、安装
1.设置K8S镜像源
cat <<EOF > /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF
2.安装Kubeadm,kubelet,kubectl
yum install -y kubelet-1.20.5 kubeadm-1.20.5 kubectl-1.20.5 --disableexcludes=kubernetes systectl start kubelet systemctl enable kubelet
四．Master配置
1.下载配置文件,并修改
kubeadm config print init-defaults >kubeadm-init.yaml
2.根据配置文件初始化K8S
kubeadm init --config kubeadm-init.yaml
3.下载并修改calico网络配置文件
wget https://docs.projectcalico.org/v3.20/manifests/calico.yaml -O
4.构建calico网络
Kubectl apply -f calico.yaml
四、woker加入master
五、安装后检查
