master端：
创建流复制用户
postgres=# CREATE USER repuser replication LOGIN CONNECTION LIMIT 3 ENCRYPTED PASSWORD 'ze0321';
CREATE ROLE
slave端：
/usr/local/pgsql/bin/pg_basebackup -h p0-tkjt-ylcloud-db01-primary -p 5432 -U repuser -w -Fp -Xs -Pv -R -D /data/pgsql_5432/pgdata/