在Ubuntu Server 16上安装networking后，如何强制PostgreSQL启动？

PostgreSQL无法绑定套接字，因为它在networking安装之前启动。

我使用Ubuntu服务器16.04.1 LTS和PostgreSQL 9.5。我通过互联网阅读了很多文档，但没有解决我的问题。

我很确定问题是： PostgreSQL服务尝试在networking接口正确设置之前创build一个套接字。

sudo systemctl status postgresql@9.5-main.service ● [email protected] - PostgreSQL Cluster 9.5-main Loaded: loaded (/lib/systemd/system/[email protected]; disabled; vendor preset: enabled) Active: failed (Result: exit-code) since Wed 2016-07-27 09:42:36 UTC; 1min 43s ago Process: 5274 ExecStart=postgresql@%i --skip-systemctl-redirect %i start (code=exited, status=1/FAILURE) Jul 27 09:42:34 airpy-server systemd[1]: Starting PostgreSQL Cluster 9.5-main... Jul 27 09:42:36 airpy-server [email protected][5274]: The PostgreSQL server failed to start. Please check the log outp Jul 27 09:42:36 airpy-server [email protected][5274]: 2016-07-27 09:42:36 UTC [5332-1] LOG: could not bind IPv4 socke Jul 27 09:42:36 airpy-server [email protected][5274]: 2016-07-27 09:42:36 UTC [5332-2] HINT: Is another postmaster al Jul 27 09:42:36 airpy-server [email protected][5274]: 2016-07-27 09:42:36 UTC [5332-3] WARNING: could not create list Jul 27 09:42:36 airpy-server [email protected][5274]: 2016-07-27 09:42:36 UTC [5332-4] FATAL: could not create any TC Jul 27 09:42:36 airpy-server systemd[1]: [email protected]: Control process exited, code=exited status=1 Jul 27 09:42:36 airpy-server systemd[1]: Failed to start PostgreSQL Cluster 9.5-main. Jul 27 09:42:36 airpy-server systemd[1]: [email protected]: Unit entered failed state. Jul 27 09:42:36 airpy-server systemd[1]: [email protected]: Failed with result 'exit-code'.

我必须使用DHCP（而且我不能改变它）和一个固定租约。由于我已将listen_address='fixed_ip'为postgresql.conf因此集群不会在启动时启动。这是一切开始…

而且我浪费了两天时间，试图让postgreSQL等待networkingconfiguration没有成功。它在Ubuntu Server 14.04上的工作就像一个魅力（我没有configuration任何东西），现在它不适用于新的LTS版本。