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 Post subject: Re: 1and1 ASL Kernel Problem
Unread postPosted: Thu Aug 25, 2011 6:40 pm 
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Joined: Thu Feb 07, 2008 7:49 pm
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Location: Chantilly, VA
Do you think its the Centos raid-sync issue? If so, then yes, although since we dont know for sure what your issue is I can't say for sure if that will resolve your present issue.

The upside is Centos 6, hey its newer! :-)

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Michael Shinn
Atomicorp - Security For Everyone

Co-Author of Troubleshooting Linux Firewalls.


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 Post subject: Re: 1and1 ASL Kernel Problem
Unread postPosted: Wed Sep 07, 2011 3:55 am 
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I've just had another instance myself but think my contribution may have been a red hearing from the start, at least regarding a RAID Sync ... any suggestions on the below?

1&1 Dedicated server went unreachable... mail, httpd, nagios agent all unresponsive.

Serial console was reachable and pinging http://www.google.com was showing packet loss.

Code:
PING www.l.google.com (74.125.39.103) 56(84) bytes of data.
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=1 ttl=55 time=174 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=2 ttl=55 time=124 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=5 ttl=55 time=156 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=8 ttl=55 time=154 ms

--- www.l.google.com ping statistics ---
11 packets transmitted, 4 received, 63% packet loss, time 10006ms
rtt min/avg/max/mdev = 124.610/152.596/174.816/18.000 ms

Attempted service network restart - no change in behaviour

Did full reboot and this fixed the issue. Saw a couple of warnings/errors in reboot process. The one regarding a kernel module was the worrying one.

Code:
The system is going down for reboot NOW!
INIT: Sending pStopping atd: [  OK  ]
Stopping psmon: [  OK  ]
Shutting down mailman: [  OK  ]
Stopping httpd: [  OK  ]
Stopping psa:  Stopping Plesk...                                     done
Stopping mail handlers tmpfs storage
[  OK  ]
Stopping tortixd: [  OK  ]
Stopping sshd: [  OK  ]
Stopping Courier-IMAP server:
   Stopping imap [  OK  ]
   Stopping imap-ssl [  OK  ]
   Stopping pop3 [  OK  ]
   Stopping pop3-ssl [  OK  ]

Stopping : Stopping mysqld:  [  OK  ]
Stopping Clam AntiVirus Daemon: [  OK  ]
Stopping xinetd: [  OK  ]
Stopping crond: [  OK  ]
Stopping monitoring for VG vg00:   3 logical volume(s) in volume group "vg00" unmonitored
[  OK  ]
Shutting down ntpd: [  OK  ]
Stopping named: .[  OK  ]
Shutting down kernel logger: [  OK  ]
Shutting down system logger: [  OK  ]
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
iptables: Flushing firewall rules: [  OK  ]
iptables: Setting chains to policy ACCEPT: mangle nat filter [  OK  ]
iptables: Unloading modules:  iptable_mangle iptable_nat[FAILED]
Disabling ondemand cpu frequency scaling: FATAL: Error removing cpufreq_ondemand (/lib/modules/2.6.32.43-6.art.x86_64/kernel/drivers/cpufreq/cpufreq_ondemand.ko): Operation not permitted
[  OK  ]
Starting killall:  Shutting down spamd: [  OK  ]
[  OK  ]
Sending all processes the TERM signal...
Sending all processes the KILL signal...
Saving random seed: 
Syncing hardware clock to system time grsec: time set by /sbin/hwclock[hwclock:7653] uid/euid:0/0 gid/egid:0/0, parent /etc/rc.d/init.d/halt[S01reboot:6836] uid/euid:0/0 gid/egid:0/0

Turning off swap: 
Unmounting file systems:  umount2: Device or resource busy
umount: /usr: device is busy
umount2: Device or resource busy
umount: /usr: device is busy

Unmounting file systems (retry):  umount2: Device or resource busy
umount: /usr: device is busy
umount2: Device or resource busy
umount: /usr: device is busy

Unmounting file systems (retry):  umount2: Device or resource busy
umount: /usr: device is busy
umount2: Device or resource busy
umount: /usr: device is busy

umount2: Device or resource busy
umount: /usr: device is busy
umount2: Device or resource busy
umount: /usr: device is busy
Please stand by while rebooting the system...

Thanks,
Steve


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 Post subject: Re: 1and1 ASL Kernel Problem
Unread postPosted: Wed Sep 07, 2011 6:33 am 
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Atomicorp Staff - Site Admin
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Joined: Thu Feb 07, 2008 7:49 pm
Posts: 3657
Location: Chantilly, VA
Quote:
Disabling ondemand cpu frequency scaling: FATAL: Error removing cpufreq_ondemand (/lib/modules/2.6.32.43-6.art.x86_64/kernel/drivers/cpufreq/cpufreq_ondemand.ko): Operation not permitted


Thats both benign and expected. You can ignore it and anything like. ASL kernels can be configured (and set this way by default) to lock themselves. Please see this FAQ:

https://www.atomicorp.com/wiki/index.ph ... el_modules.

Quote:
Serial console was reachable and pinging http://www.google.com was showing packet loss.

Code:
PING www.l.google.com (74.125.39.103) 56(84) bytes of data.
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=1 ttl=55 time=174 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=2 ttl=55 time=124 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=5 ttl=55 time=156 ms
64 bytes from fx-in-f103.1e100.net (74.125.39.103): icmp_seq=8 ttl=55 time=154 ms

--- www.l.google.com ping statistics ---
11 packets transmitted, 4 received, 63% packet loss, time 10006ms
rtt min/avg/max/mdev = 124.610/152.596/174.816/18.000 ms


Do you see any kernel errors in /var/log/messages that show something happened to the network drivers? If not, then you can rule out the kernel, if you do see opps errors please post them.

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Michael Shinn
Atomicorp - Security For Everyone

Co-Author of Troubleshooting Linux Firewalls.


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 Post subject: Re: 1and1 ASL Kernel Problem
Unread postPosted: Wed Sep 07, 2011 3:41 pm 
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Joined: Tue Apr 27, 2010 2:21 am
Posts: 30
I've checked the /var/log/messages file around the time of the problem this morning and there's no kernel errors...

Seems it must have been a network issue at 1&1 yet strange how a reboot fixed it...


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