k8s 架构图:
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##第一章###
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前期准备工作:
(1)关闭防火墙,和selinux
yum -y install wget vim net-tools ntpdate
systemctl stop firewalld
systemctl disable firewalld
sed -i 's/enforcing/disabled/' /etc/selinux/config
setenforce 0
systemctl stop NetworkManager
systemctl disable NetworkManager
(2)时钟同步
echo '*/10 * * * * /usr/sbin/ntpdate -s 10.100.60.6 >/dev/null 2>&1 && /sbin/clock -w' > /var/spool/cron/root
service crond restart
ntpdate -s 10.100.60.6
(3)私有主机禁用swap分区
swapoff -a
[root@master01 ~]# cat /etc/fstab
/dev/mapper/centos-root / xfs defaults 0 0
UUID=8d103c59-0306-4493-94f2-1e3726d87cfb /boot xfs defaults 0 0
#/dev/mapper/centos-swap swap swap defaults 0 0
(4)互相解析
cat >> /etc/hosts << EOF
192.168.187.141 master01
192.168.187.142 master02
192.168.187.143 node01
192.168.187.144 node02
192.168.187.145 node03
EOF
(5)master对node节点ssh互信
[root@master01 ~]# ssh-keygen
[root@master01 ~]# ssh-copy-id node01
[root@master01 ~]# ssh-copy-id node02
(6)修改内核参数
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
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###第二章 ####
###################################################
注意:以下在所有节点执行(master+node),安装docker,kubeadm,kubelet
1、配置docker源
cat >> /etc/yum.repos.d/docker.repo <<EOF
[docker-repo]
name=Docker Repository
baseurl=http://mirrors.aliyun.com/docker-engine/yum/repo/main/centos/7
enabled=1
gpgcheck=0
EOF
#配置kubernetes源
cat >> /etc/yum.repos.d/kubernetes.repo <<EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/