pg主机：
开用户
createuser -s -P barman
密码barman1234
创建replication用户
createuser -P --replication streaming_barman
密码streaming_barman1234
ssh-keygen
barman主机：
密码写入~barman/.pgpass
pg:5432:postgres:barman:barman1234
192.168.219.30:5432:postgres:barman:barman1234
pg:5432:postgres:streaming_barman:streaming_barman1234
192.168.219.30:5432:postgres:streaming_barman:streaming_barman1234
使用barman的linux系统用户
psql -c 'select version()' -U barman -h 192.168.219.30 postgres
sudo -u barman psql -U streaming_barman -h pg
-c "IDENTIFY_SYSTEM"
replication=1
ssh-keygen
root@barman:/etc/barman.d# cat streaming-server.conf
[pg]
description = "Example of PostgreSQL Database (Streaming-Only)"
conninfo = host=pg user=barman dbname=postgres
streaming_conninfo = host=pg user=streaming_barman dbname=postgres
backup_method = postgres