Posts Tagged ‘Parallels’

Missing Parallels Plesk for Linux updates

Saturday, February 11th, 2012

If you’re using Parallels Plesk 9.x with Postfix as the MTA, there appears to be a bug which can stop Plesk from displaying important updates that are available, including the micro-updates which provide important bug fixes and security updates.

If you are using the Updates section of the Plesk web interface, then no error message is displayed, so it just looks like there are no updates available. However, you can also check for updates using the Parallels autoinstaller utility from the command line:

/usr/local/psa/admin/sbin/autoinstaller –check-updates

After downloading all of the .inf3 files from Parallels, this will give you a badly translated error message:

Unable to process patch config: PSA_9.5.4/plesk-patches-9.5.4-cos5-x86_64.inf3: Failed to parse the patch file at (line 34 column 13)
Group named ‘qmail’ is not exists on this system.

Despite the qmail MTA not being installed because the Postifx MTA is being used, the Plesk autoinstaller utility (which is also used by the web interface) seems to be checking for a “qmail” group. The fix for this is incredibly simple – just create an empty ‘qmail” group:

/usr/sbin/groupadd qmail

Now if you refresh the Updates section in the Plesk web interface or re-run the Parallels autoinstaller from the command line then you should now see the available updates, which you can install in the normal manner.

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Regenerate statistics in Parallels Plesk for Linux

Monday, February 6th, 2012

Every night Parallels Plesk for Linux servers run a cron job to process various log files and generate statistics. This includes generating the HTML for the AWStats or Webalizer log analysis packages used for the Plesk “web statistics” features as well as updating the disk usage and bandwidth usage for each domain.

Sometimes you need to re-run this task, such as if it failed or if you need to process a particular domain name again. One common reason for this is to correct the disk and/or bandwidth usage figures for a domain.

You can either regenerate the statistics for all domain names (the equivalent of the daily cron job) using:

/usr/local/psa/admin/sbin/statistics –calculate-all

Or you can re-generate the statistics for a single domain name (“example.com” in this case) using:

/usr/local/psa/admin/sbin/statistics –calculate-one –domain-name=example.com

There is a similar tool in Parallels Plesk for Windows under C:\Program Files (x86)\Parallels\Plesk\admin\bin\statistics.exe, however this requires different arguments.

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Unable to send attachments in Horde

Thursday, September 29th, 2011

I recently came across a bizzare issue in the version of Horde webmail shipped with Parallels Plesk 9.5.2 where it would allow you to attach files to an e-mail you are composing, but when you send the e-mail the attachment never arrives. Sending the same attachment via the Atmail webmail client or a traditional SMTP client wasn’t a problem and the mail server logs didn’t indicate that the attachment was getting stripped, so it was eveidently never getting attached to the e-mail in the first place.

For some reason Parallels Plesk doesn’t specify a seperate ErrorLog for the Horde webmail.domain.com vhost in /etc/httpd/conf.d/zzz_horde_vhost.conf so all of the logs from Horde end up in the main Apachce HTTPD error log at /var/log/httpd/error_log.

In the logs there should be PHP errors where Horde is unable to load one of it’s shared libraries that is used for processing attachments:

PHP Fatal error: Can’t load Horde/Serialize.php, open_basedir restriction. in /usr/share/psa-horde/lib/Horde/SessionObjects.php on line 134,

The easiest way to fix this is to change the relative path to the file (Horde/Serialize.php) to an asbolute path, so take a copy of /usr/share/psa-horde/lib/Horde/SessionObjects.php as a backup then open the file up and
look for two lines that say:

require_once ‘Horde/Serialize.php’;

And edit these two lines to have the full path:

require_once ‘/usr/share/psa-horde/lib/Horde/Serialize.php’;

Now all you have to do is save the file and test that Horde has started working as expected. Remember that future updates to Horde from Parallels will overwrite this file and you will have to re-apply your change.

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