Webmin not accessible for minutes after server reboot

A web-based interface for system administration of UNIX

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#4420 Webmin not accessible for minutes after server reboot

Milestone: 0.82

Status: closed-fixed

Owner: nobody

Labels: None

Priority: 5

Updated: 2014-05-27

Created: 2014-05-25

Creator: Michael Heuberger

Private: No

Hello there

Each time I restart my server, the webmin UI is not accessible for minutes. I really have to wait for about 15 minutes until I can access it.

It is really weird. All the other services on my server work insanely fast after reboot except Virtualmin / Webmin. How come?

Discussion

Jamie Cameron - 2014-05-25

Is Webmin's miniserv.pl process actually running during this period?

The issue may be that it is blocked behind other services in the boot order. If you have access to the console during bootup you should be able to see this.

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Michael Heuberger - 2014-05-25

Okay, I checked the log and see it's having issues during boot:

[23/May/2014:19:35:01 +1200] miniserv.pl started
[23/May/2014:19:35:01 +1200] IPv6 support enabled
[23/May/2014:19:35:01 +1200] Using MD5 module Digest::MD5
[23/May/2014:19:35:01 +1200] PAM authentication enabled
[23/May/2014:20:07:24 +1200] Reloading configuration
Failed to initialize SSL connection

When I manually start with sudo service webmin start few minutes later, it works. Weird.

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Jamie Cameron - 2014-05-26

Those are just warning and diagnostic messages though - they don't indicate startup failure.

At what time did you reboot the system?

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Michael Heuberger - 2014-05-26

Ifound out, that VirtualMin/Webmin use lots of memory. Didn't have enough on my server so I had to buy more. Now Webmin starts faster.

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Jamie Cameron - 2014-05-27

Ok, that would explain it.

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Jamie Cameron - 2014-05-27

status: open --> closed-fixed
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Michael Heuberger - 2014-05-27

Sweet. But tell me, how can I reduce Webmin's numbers of instances?

I see there are many in my process list:

18586 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
18587 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
18588 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
19047 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
19048 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
19051 root 129992 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf
4359 root 125764 kB /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webmin/miniserv.conf

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Jamie Cameron - 2014-05-27

Those instances share most of their memory, so it won't make much of a difference to reduce them. The number is driven by the number of concurrent browser connections.

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