如何在Mac OS X上启动PostgreSQL服务器？ - How to start PostgreSQL server on Mac OS X?

问题：

FINAL UPDATE: 最终更新：

I had forgotten to run the initdb command. 我忘了运行initdb命令。

< /FINAL UPDATE> </ FINAL UPDATE>

by running this command 经过运行此命令

ps auxwww | grep postgres

I see that postgres is not running 我看到postgres没有运行

> ps auxwww | grep postgres
remcat          1789   0.0  0.0  2434892    480 s000  R+   11:28PM   0:00.00 grep postgres

this raises the question: How do I start the postgresql server? 这引出了一个问题：如何启动postgresql服务器？

update: 更新：

>pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start
server starting
sh: /usr/local/var/postgres/server.log: No such file or directory

update 2: 更新2：

The touch was not successful so I did this instead: 触摸不成功因此我这样作了：

> mkdir /usr/local/var/postgres
> vi /usr/local/var/postgres/server.log
> ls /usr/local/var/postgres/          
server.log

But when I try to start rails server, I still see this: 可是当我尝试启动rails服务器时，我仍然看到：

Is the server running on host "localhost" and accepting
TCP/IP connections on port 5432?

update 3: 更新3：

> pg_ctl -D /usr/local/var/postgres status
pg_ctl: no server running

update 4: 更新4：

I found that there WAS NO pg_hba.conf (only pg_hba.conf.sample) so I modified the sample and renamed it (to remover the .sample). 我发现没有pg_hba.conf（只有pg_hba.conf.sample）因此我修改了样本并将其重命名（以移除.sample）。 Here are the contents: 如下是内容：

# IPv4 local connections:
 host    all             all             127.0.0.1/32           trust
 # IPv6 local connections:
 host    all             all             ::1/128                trust

but I don't understand this: 但我不明白这个：

> pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start     
server starting
> pg_ctl -D /usr/local/var/postgres status                                     
pg_ctl: no server running

also: 也：

sudo find / -name postgresql.conf
find: /dev/fd/3: Not a directory
find: /dev/fd/4: Not a directory

update 5: 更新5：

sudo pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start
Password:
pg_ctl: cannot be run as root
Please log in (using, e.g., "su") as the (unprivileged) user that will own the server process.

update 6: 更新6：

this seems odd: 这看起来很奇怪：

> egrep 'listen|port' /usr/local/var/postgres/postgresql.conf
egrep: /usr/local/var/postgres/postgresql.conf: No such file or directory

though, I did do this: 不过，我这样作了：

>sudo find / -name "*postgresql.conf*"
find: /dev/fd/3: Not a directory
find: /dev/fd/4: Not a directory
/usr/local/Cellar/postgresql/9.0.4/share/postgresql/postgresql.conf.sample
/usr/share/postgresql/postgresql.conf.sample

so I did this: 因此我这样作了：

egrep 'listen|port' /usr/local/Cellar/postgresql/9.0.4/share/postgresql/postgresql.conf.sample 
#listen_addresses = 'localhost'     # what IP address(es) to listen on;
#port = 5432                # (change requires restart)
                # supported by the operating system:
                #   %r = remote host and port

so I tried this: 因此我试过这个：

> cp /usr/local/Cellar/postgresql/9.0.4/share/postgresql/postgresql.conf.sample /usr/local/Cellar/postgresql/9.0.4/share/postgresql/postgresql.conf        
> cp /usr/share/postgresql/postgresql.conf.sample /usr/share/postgresql/postgresql.conf

still getting the same "Is the server running?" 仍然是相同的“服务器正在运行吗？” message. 信息。

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解决方案：

参考一： https://stackoom.com/question/XSo0/如何在Mac-OS-X上启动PostgreSQL服务器
参考二： https://oldbug.net/q/XSo0/How-to-start-PostgreSQL-server-on-Mac-OS-X