Some short commands
List out all messages currently in queue by running:
/var/qmail/bin/qmail-qread
Count the number of messages in the queue currently by running:
/var/qmail/bin/qmail-qstat
Delete all mails from queue
/usr/local/psa/admin/sbin/mailqueuemng -D
Well today a new problem.
I have try to install the letsencrypt  module on a plesk centos 6 server . That have python 2.6 and you will get a warning I think that is not working with python2.6 but the problem is other module.
The error’s look something like this
Fehler: Fehler bei der Installation des SSL-Zertifikats von Let’s Encrypt: Failed letsencrypt execution: /usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/cryptography/__init__.py:25: DeprecationWarning: Python 2.6 is no longer supported by the Python core team, please upgrade your Python.
DeprecationWarning
Traceback (most recent call last):
File "/usr/local/psa/var/modules/letsencrypt/venv/bin/letsencrypt", line 11, in <module>
sys.exit(main())
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/letsencrypt/cli.py", line 1950, in main
plugins = plugins_disco.PluginsRegistry.find_all()
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/letsencrypt/plugins/disco.py", line 168, in find_all
plugin_ep = PluginEntryPoint(entry_point)
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/letsencrypt/plugins/disco.py", line 31, in __init__
self.plugin_cls = entry_point.load()
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/pkg_resources/__init__.py", line 2201, in load
self.require(*args, **kwargs)
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/pkg_resources/__init__.py", line 2218, in require
items = working_set.resolve(reqs, env, installer)
File "/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages/pkg_resources/__init__.py", line 835, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
ContextualVersionConflict: (cryptography 1.1 (/usr/local/psa/var/modules/letsencrypt/venv.gUBSl/lib/python2.6/site-packages), Requirement.parse(‘cryptography>=1.3’), set([‘PyOpenSSL’]))
The problem actually is the crypthography module.
So the fix is
cd /usr/local/psa/var/modules/letsencrypt/venv/bin
./pip install –upgrade cryptography
Hello
Well it appear that on a plesk server with only os reloaded we see some load.
I search the raid but it was finished to re sync so no load should be there .
After debugging with iotop I see this
505 be/3 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [jbd2/md1-8]
After a little search it appear that is from ext4 journaling.
Not to disable ext4 journaling is not so easy because you have to umount the partition, or to be monuted in read only .
After a little search I found out that rsyslog was the problem was hitting the limit, and was writing a lot of information into the log. After disabling the rsyslog everything was back to normal . However I am waiting again the problem to see what pid was causing this.
Any way strange problem .
Regards
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