Re: Problem about connecting PostgreSQL through TCP/IP - Mailing list pgsql-php
| From | Matthew Terenzio |
|---|---|
| Subject | Re: Problem about connecting PostgreSQL through TCP/IP |
| Date | |
| Msg-id | ee2aa556c95d6a67036023dc63cfdba9@jobsforge.com Whole thread Raw |
| In response to | Problem about connecting PostgreSQL through TCP/IP (Hui Chen <gray.chenhui@gmail.com>) |
| List | pgsql-php |
>
> restart posgresql by
> /sbin/service postgresql restart
> The server was restarted OK.
>
I usually use pg_ctl to start.
With it and other methods of starting postgres you have to include the
-i flag to get it to listen over TCP/IP
perhaps your method of restarting needs this flag as well?
> The PHP script used to connect database is as follows,
> <?php
> $conn = pg_connect("host=localhost port=5432 dbname=foodb user=foo
> password=foo") or die ("Can not connect to postgres");
> $result=pg_exec("SELECT * FROM footbl");
> $fetch = pg_fetch_row($result);
> print "<html><body>";
> print $fetch[0];
> print "<body></html>";
>
> pg_close($conn); // Close this connection
> ?>
>
> Assume this PHP script is named as "connectdb.php", then on
> commandline, when I run the following,
> php connectedb.php
> I see correct results, e.g.,
> <html><body>foo<body></html>
>
> On commandline again, I used the following to connect database,
> psql -d foodb -h localhost -p 5432 -U foo
> Password: ************
> Welcome to psql 8.0.3, the PostgreSQL interactive terminal.
>
> Type: \copyright for distribution terms
> \h for help with SQL commands
> \? for help with psql commands
> \g or terminate with semicolon to execute query
> \q to quit
>
> foodb=>
>
> It is OK. Then I disabled "iptables" temporarily for testing purpose by
> /sbin/service iptables stop
> Flushing firewall rules: [ OK ]
> Setting chains to policy ACCEPT: filter [ OK ]
> Unloading iptables modules: [ OK ]
>
> On localhost, I tried this command,
> telnet localhost 5432
> after hit "enters", telnet exited. I checked postgresql_%S.log and see
> "LOG: invalid length of startup packet"
> which means postgresql server indeed saw the telnet connection.
>
> I tried this on any of my other machines in the LAN, I observed the
> same thing.
>
> In summary, it seemed the postgresql allowed TCP/IP connection, and
> worked well. However, when I ran the PHP script through web browser, I
> did not get connection. Instead, in Apache web server's error_log, I
> see
> [client 192.168.1.10] PHP Warning: pg_connect() [<a
> href='function.pg-connect'>function.pg-connect</a>]: Unable to connect
> to PostgreSQL server: could not connect to server: Permission
> denied\n\tIs the server running on host "localhost" and
> accepting\n\tTCP/IP connections on port 5432? in /foo/connectdb.php on
> line 2
>
> Interestingly, when I checked the log file for postgresql again, it
> did not have anything for this connection failure. It seemed the
> connection did not send to the database server at all. However,
> 1) I disabled firewall
> 2) I can telnet the ports
> 3) I can run the script from commandline
>
> What could go wrong?
>
> Thanks a lot for your reading this lengthy email. Waiting for your
> help!
>
> Gray
>
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