k8s-JZTXT

设置域名映射
cat /etc/hosts
{IP} {HOSTNAMW}
关闭防火墙

sudo systemctl disable firewalld --now

关闭selinux

#临时生效
sudo setenforce 0
# 永久生效
sed -ri 's/(SELINUX=).*/\1disabled/g' /etc/selinux/config

设置内核模块

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
modprobe -- br_netfilter
modprobe -- ipip
EOF
 
# 生效ipvs模块
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules
 
# 验证
lsmod | grep -e ip_vs -e nf_conntrack -e br_netfilter

设置内核参数

cat > /etc/sysctl.d/kubernetes.conf << EOF
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
EOF

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

时间同步

yum install -y chrony
sed -ri 's/(server .* iburst)/# \1/g' /etc/chrony.conf
echo "server ntp.aliyun.com iburst" >> /etc/chrony.conf
systemctl restart chronyd
chronyc sources

关闭swap分区

#临时生效
swapoff -a
 
#永久生效，需要重启
sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

安装docker

yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2

yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

yum install docker-ce-18.09.9 -y

设置docker cgroupdriver

mkdir -p /etc/docker  
vi /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors" : [
    "https://ot2k4d59.mirror.aliyuncs.com/"
  ]
}

启动docker

systemctl enable docker --now

安装初始化kuebrnets集群相关命令

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

# master节点
yum install kubelet-1.18.18 kubeadm-1.18.18 kubectl-1.18.18

# node节点
yum install kubelet-1.18.18

初始化集群

kubeadm init --kubernetes-version=v1.18.18 --image-repository gcr.azk8s.cn/google_containers