Ubuntu 10.04 - Cannot Create TCP/IP Sockets

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Good evening.

I've recently provisioned a new Ubuntu 10.04 server. I ran "apt-get install postgresql-8.4", just like I normally do when I'm setting up a new server. However, this time I got an error about an inability to create TCP/IP sockets. The full error is below.

 * Starting PostgreSQL 8.4 database server
 * The PostgreSQL server failed to start. Please check the log output:
2010-05-03 03:36:06 UTC LOG: could not bind IPv4 socket: Cannot assign requested address 2010-05-03 03:36:06 UTC HINT: Is another postmaster already running on port 5432? If not, wait a few seconds and retry. 2010-05-03 03:36:06 UTC WARNING: could not create listen socket for "localhost"
2010-05-03 03:36:06 UTC FATAL:  could not create any TCP/IP sockets

However, there is nothing on port 5432...

root@coolnewserver:~# netstat -l
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 *:ssh                   *:*                     LISTEN
tcp        0      0 localhost:smtp          *:*                     LISTEN
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN

...and no postgresql processes...

root@coolnewserver:~# ps -ef | grep postgresql
root      7738  3403  0 03:37 pts/0    00:00:00 grep --color=auto postgresql
root@coolnewserver:~# ps -ef | grep postmaster
root      7740  3403  0 03:37 pts/0    00:00:00 grep --color=auto postmaster

Possibly pertinent lines from /etc/postgresql/8.4/main/postgresql.conf...

listen_addresses = 'localhost'
port = 5432
max_connections = 100
unix_socket_directory = '/var/run/postgresql'

...permissions on that last directory are...

drwxrwsr-x 2 postgres postgres   40 2010-05-03 03:10 postgresql

...and localhost is resolving...

root@coolnewserver:~# nslookup localhost
Server:        [IP]
Address:    [IP]#53

Name:    localhost
Address: 127.0.0.1

Using search engines, I've seen this error, and my question, asked on occasion; what I didn't find was what the actual solution was. Anyone remember? I'll be sure to post what I find, so that maybe others can benefit a few years from now. :)

Thanks...


Daniel

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