1、创建用户postgresansible all -m shell -a "useradd postgres"
3、批量安装基础软件包ansible all -m shell -a "yum install -y flex biso荏鱿胫协n readline-devel zlib-devel openjade docbook-style-dsssl gcc"
5、全部节点都创建pg垓矗梅吒xc路径，用来存放postgres文件ansible all -m shell -a "su - postgres -艘早祓胂c 'mkdir -p /home/postgres/pgxc/nodes/'"
7、关闭iptablessystemctl stop iptables.servicesystemctl disable iptables.service关闭SELinuxsetenforce 0
