CentOS 8.3 XXX Cluster Initialization Configuration

一、CentOS 8.3 XXX Cluster Initialization Configuration

1 节点规划

官方建议节点数量为奇数个

2 设置主机名

sudo hostnamectl set-hostname master01
sudo hostnamectl set-hostname slave01
sudo hostnamectl set-hostname slave02

3 配置hosts本地解析

cat > /etc/hosts <<EOF
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.80.31 master01
192.168.80.32 slave01
192.168.80.33 slave02
EOF

4 关闭防火墙 / Selinux

# 关闭防火墙
systemctl stop firewalld
systemctl disable --now firewalld

# 关闭Selinux
# 永久关闭
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
# 临时关闭
setenforce 0
# 检查
cat /etc/selinux/config
/usr/sbin/sestatus -v

5 互相免密

Master 节点执行免密操作

ssh-keygen -t rsa

# 定义 master 列表
MASTER_LIST=(
192.168.80.32
192.168.80.33
)

# 配置免密登录
for i in ${MASTER_LIST[@]};do
    ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
done

# yes
# 输入密码