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3ware disk failure -> hang
by Joshua Baker-LePain 18 Jan '06

18 Jan '06

I've got an i386 server running centos 4.2 with 3 3ware controllers in it -- an 8006-2 for the system disks and 2 7500-8s. On the 7500s, I'm running an all software RAID50. This morning I came in to find the system hung. Turns out a disk went overnight on one of the 7500s, and rather than a graceful failover I got this: Jan 6 01:03:58 $SERVER kernel: 3w-xxxx: scsi2: Command failed: status = 0xc7,flags = 0x40, unit #3. Jan 6 01:04:02 $SERVER kernel: 3w-xxxx: scsi2: AEN: ERROR: Drive error: Port #3. Jan 6 01:04:10 $SERVER 3w-xxxx[2781]: ERROR: Drive error encountered on port 3 on controller ID:2. Check cables and drives for media errors. (0xa) Jan 6 01:04:10 $SERVER kernel: Debug: sleeping function called from invalid context at include/asm/uaccess.h:556 Jan 6 01:04:10 $SERVER kernel: in_atomic():0[expected: 0], irqs_disabled():1 Jan 6 01:04:10 $SERVER kernel: [<c011fbe9>] __might_sleep+0x7d/0x88 Jan 6 01:04:10 $SERVER kernel: [<f885f056>] tw_ioctl+0x478/0xb07 [3w_xxxx] Jan 6 01:04:10 $SERVER kernel: [<c011fec9>] autoremove_wake_function+0x0/0x2d Jan 6 01:04:10 $SERVER kernel: [<f883f905>] scsi_done+0x0/0x16 [scsi_mod] Jan 6 01:04:10 $SERVER kernel: [<f8860529>] tw_scsi_queue+0x163/0x1f1 [3w_xxxx] Jan 6 01:04:10 $SERVER kernel: [<f883f748>] scsi_dispatch_cmd+0x1e9/0x24f [scsi_mod] Jan 6 01:04:10 $SERVER kernel: [<f884417e>] scsi_request_fn+0x297/0x30d [scsi_mod] Jan 6 01:04:10 $SERVER kernel: [<c0221f68>] __generic_unplug_device+0x2b/0x2d Jan 6 01:04:10 $SERVER kernel: [<c0221f7f>] generic_unplug_device+0x15/0x21 Jan 6 01:04:10 $SERVER kernel: [<c022288d>] blk_execute_rq+0x88/0xb0 Jan 6 01:04:10 $SERVER kernel: [<c022096e>] elv_set_request+0xa/0x17 Jan 6 01:04:10 $SERVER kernel: [<c022251f>] get_request+0x1de/0x1e8 Jan 6 01:04:10 $SERVER kernel: [<c01a97c3>] task_has_capability+0x4a/0x52 Jan 6 01:04:10 $SERVER kernel: [<c0225cd5>] sg_scsi_ioctl+0x2bf/0x3c1 Jan 6 01:04:10 $SERVER kernel: [<c02261aa>] scsi_cmd_ioctl+0x3d3/0x475 Jan 6 01:04:10 $SERVER kernel: [<c014d41b>] handle_mm_fault+0xbd/0x175 Jan 6 01:04:10 $SERVER kernel: [<c011ad67>] do_page_fault+0x1ae/0x5c6 Jan 6 01:04:10 $SERVER kernel: [<c014e4a6>] vma_adjust+0x286/0x2d6 Jan 6 01:04:10 $SERVER kernel: [<f88228ea>] sd_ioctl+0xb3/0xd4 [sd_mod] Jan 6 01:04:10 $SERVER kernel: [<c02246e8>] blkdev_ioctl+0x328/0x334 The 3ware boards are running the latest firmware and I'm using the stock driver in the kernel. I *did* have to upgrade mdadm to 1.12.0, as the stock version doesn't support stacked arrays. 3dmd is running. Any ideas as to what I can do to prevent this in the future? Having the system hang every time a disk dies is, well, less than optimal. Thanks. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University

9 38

unconfig'ing a machine
by Mark Belanger 18 Jan '06

18 Jan '06

The sys-unconfig script does not really work as advertised. For one thing it doesn't change the hostname. Is there an documentation about how to do the following: - Change the hostname, IP, networking etc for a currently networked machine - Change the hostname, IP, networking etc for a currently non-networked machine - Turn a networked machine into a non-networked machine. On a higher level - I'm looking for a turnkey way to send a box to someone, and have them set up the host and networking info. tia, -Mark

3 2

yum groupinstall "MySQL Database"
by Alexandru E. Ungur 17 Jan '06

17 Jan '06

Hi all, I have a question related to yum groupinstall. I just tried a: yum groupinstall "MySQL Database" I expected that I would end up with a MySQL Database server, but it installed a bunch of .rpms *except* mysql-server. No big deal, I'm just curious if it was intended this way or not, that's all. Thank you and, Have a nice evening everyone, Alex

3 2

Netfilter conntrack problem...
by Maciej Żenczykowski 17 Jan '06

17 Jan '06

Hi folks, I have the following in my firewall (condensed version) [CentOS 4.2: 2.6.9-11.EL.i686 kernel]: INPUT: --state ESTABLISHED,RELATED -j ACCEPT -p tcp -j REJECT --reject-with tcp-reset -j REJECT OUTPUT: ACCEPT The connection is over a wireless link so packets _do_ get dropped even though throughput is around 100-400 kB/s (depending on atmospheric conditions, etc.) Now I've noticed that sometimes connections are broken, I've narrowed the problem down to _this_ firewall (as in it's not the only one, but I'm pretty sure that it's at fault here...) Tcpdumping a "ssh somewhere cat /dev/zero > /dev/null" session on the firewall to an external host (a few hops away, reliable links, except for the single wireless link) on a prematurely terminated connection reveals the following (near the very end): # tcpdump -i eth1 host $TARGET -n -nn SRC=$FIREWALL:38945 DST=$TARGET:22 (all stream counts (acks) where 1728xxxxx so 1728 has been replaced with nil to gain on readability...) 034006 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026606 838569311,nop,nop,sack sack 3 {11403:12851}{07059:09955} 068320 IP DST > SRC: . 12851:14299(1448) ack 85975 win 8576 <nop,nop,timestamp 838569322 603026606> 068421 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026641 838569311,nop,nop,sack sack 3 {11403:14299}{07059:09955} 101781 IP DST > SRC: P 14299:15747(1448) ack 85975 win 8576 <nop,nop,timestamp 838569325 603026641> 101879 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026674 838569311,nop,nop,sack sack 2 {11403:18643}{07059:09955} 133870 IP DST > SRC: . 18643:20091(1448) ack 85975 win 8576 <nop,nop,timestamp 838569328 603026674> 133969 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026706 838569311,nop,nop,sack sack 2 {11403:20091}{07059:09955} 164262 IP DST > SRC: . 20091:21539(1448) ack 85975 win 8576 <nop,nop,timestamp 838569332 603026706> 164358 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026737 838569311,nop,nop,sack sack 2 {11403:21539}{07059:09955} 198287 IP DST > SRC: . 21539:22987(1448) ack 85975 win 8576 <nop,nop,timestamp 838569335 603026737> 198386 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026771 838569311,nop,nop,sack sack 2 {11403:22987}{07059:09955} 230168 IP DST > SRC: . 22987:24435(1448) ack 85975 win 8576 <nop,nop,timestamp 838569338 603026771> 230285 IP SRC > DST: . ack 05611 win 23688 <nop,nop,timestamp 603026803 838569311,nop,nop,sack sack 2 {11403:24435}{07059:09955} 252786 IP DST > SRC: . 05611:07059(1448) ack 85975 win 8576 <nop,nop,timestamp 838569340 603026771> 252857 IP SRC > DST: R 1475625677:1475625677(0) win 0 As far as I can tell, the second to last packet is perfectly valid - it is a valid retransmit of a missing/dropped piece. For some reason it results in a reset being sent from the tcp-reset rule (counter increases). Thus it would seem the packet is not matching the ESTABLISHED rule. Any ideas? Is this a bug? Has this been fixed in a/the newer kernel (I've got 156 days of uptime and a lot of junk on the box so I don't really want to reset it... :( ) Is the firewall configuration above correct - ie. is that a valid spot to generate TCP Resets? I doubt DROP'ing the packets will help since it'll just cause a stall, with future retransmits not getting through due to not matching as ESTABLISHED anyway... Cheers, MaZe.

1 0

vsftpd bug "or" feature ?
by Robert Hanson 17 Jan '06

17 Jan '06

greetings today i was expanding my knowledge of vsftpd on a low traffic CentOS 4 production environment server i have fyi, i was working on learning to setup a chroot environment by the simple editing of /etc/vsftpd/vsftpd.conf so, as i normally do when i start making changes i did this cd /etc/vsftpd/ cp -a vsftpd.conf bak-vsftpd.conf then i made the edits in /etc/vsftpd/vsftpd.conf that i needed to make for testing a chroot env for some users and saved my work then i did this service vsftpd stop service vsftpd start and to my amazement when i did a ps ax that i saw the vsftpd process had taken bak-vsftpd.conf as it's default config file and looked something like this 8890 pts/0 S 0:00 /usr/sbin/vsftpd /etc/vsftpd/bak-vsftpd.conf questions... known issue? can anyone duplicate? is it a bug?????? or a feature??? ;-> thanks and kind regards, - rh -- Robert Hanson - Abba Communications Computer & Internet Services (509) 624-7159 - www.abbacomm.net

2 2

upgrade MySQL
by JC 17 Jan '06

17 Jan '06

Hi, Anybody know how to upgrade MySQL 4.1.12 that come with Centos 4.2 to 5.0 Thanks, JC

4 3

grub errors after fresh install, partiions with md and lvm
by Keith Morse 17 Jan '06

17 Jan '06

I've done a fresh install on a new system with 2 SATA drives, Seagate 80GB each. This is the first time I've done an installation where I used software raid to provide mirroring capability to the system. The raid is level 1 for mirroring. I used the installation documention on RedHat's enterprise site to go thru the installation/configuration for this. I didn't receive any errors during the installation, but after the system boots grub issues the following messages: ================================================================================ grub loading stage1.5. Error 15 ================================================================================ Using the anaconda graphical installer, I've partitioned the drives as follows: /dev/sda /dev/sdb /dev/sda1 100mb /dev/md0 /boot /dev/sda2 76215mb /dev/md1 LVM VolGroup00 /dev/sdb1 100mb /dev/md0 /boot /dev/sdb2 76215mb /dev/md1 LVM VolGroup00 VolGroup00 76192mb LogVol00 swap 2048mb LogVol01 /root ext3 20480mb LogVol02 /home ext3 20480mb During my research into the error above, it appears as though grub cannot find the /boot partition to continue loading the subsequent stages. I'm hoping to find some general help from the list if possible. A couple of questions come to mind. Can grub boot off of a raid defined partition? If yes, what magic incantations would be appropriate? If no, should I just revert to a bare ext3 partition and don't implement raid on /boot? Relavant parts of /boot/grub/grub.conf are: default=0 timeout=5 splashimage=(hd0,0)/grub/spalsh.xmp.gz hiddenmenu title CentOS-4 i386 (2.6.9-22.EL) root (hd0,0) kernel /vmlinuz-2.6.9-22.EL ro root=/dev/VolGroup00/LogVol01 initrd /initrd-2.6.9-22.EL.img And this is CentOS 4.2.

2 2

dsniff Install Errors CentOS4.1
by Mark Sargent 17 Jan '06

17 Jan '06

Hi All, not too up on this stuff, make gcc -g -O2 -D_BSD_SOURCE -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H -DDSNIFF_LIBDIR=\"/usr/local/lib/\" -I. -I/usr/X11R6/include -I./missing -c ./arpspoof.c ./arpspoof.c: In function `arp_send': ./arpspoof.c:49: warning: passing arg 1 of `libnet_get_hwaddr' from incompatible pointer type ./arpspoof.c:49: error: too many arguments to function `libnet_get_hwaddr' ./arpspoof.c:60: warning: passing arg 6 of `libnet_build_ethernet' from incompatible pointer type ./arpspoof.c:60: error: too few arguments to function `libnet_build_ethernet' ./arpspoof.c:64: error: `ETH_H' undeclared (first use in this function) ./arpspoof.c:64: error: (Each undeclared identifier is reported only once ./arpspoof.c:64: error: for each function it appears in.) ./arpspoof.c:64: error: too few arguments to function `libnet_build_arp' ./arpspoof.c: In function `main': ./arpspoof.c:181: warning: assignment makes pointer from integer without a cast make: *** [arpspoof.o] Error 1 I installed libnet and libnids via yum Installed: libnids.i386 0:1.20-1.2.el4.rf Installed: libnet.i386 0:1.1.2.1-2.2.el4.rf Anyone know what is going on here? I'm studying CCNP, and wish to explore this tool, brought to my attention Sat at TLUG tech meet, here in Tokyo. Cheers. Mark Sargent.

1 0

vpn error message log
by Andrew Rice 17 Jan '06

17 Jan '06

does anyone know much about vpns and the error messages in the logs? I have one saying Informational Exchange is for an unknown (expired?) SA if anyone has a clue what that really means...that would be great. -- Andrew Rice Jr

1 0

clamscan --exclude problems
by rado 17 Jan '06

17 Jan '06

this is strange to me but maybe not to y'all I use clamscan --exclude in other places but this certain one will not work... let me put up my fstab before I explain k: # This file is edited by fstab-sync - see 'man fstab-sync' for details LABEL=/ / ext3 defaults 1 1 LABEL=/boot1 /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 LABEL=/rbbu /rbbu ext3 defaults 1 2 none /sys sysfs defaults 0 0 LABEL=SWAP-hda2 swap swap defaults 0 0 /dev/hdb /media/cdrecorder auto pamconsole,exec,noauto,managed 0 0 /dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0 kk...the line: LABEL=/rbbu /rbbu is hdc. it's a 250gb drive just to act as a backup server for various machines. I want to clamscan the whole system excluding /rbbu clamscan --exclude=/rbbu / just a very basic line...of course there is much more to the real one but this is the problem child. considering the LABEL=/rbbu and /rbbu being the mount point ....I believe this might be where the problem lies but I'm not sure. If I must, I could rename the mount point to something else and now thinking bout it, would not cause that many problems...just a lot of tweaking in lots of scripts which I would rather not but if y'all feel that's the fix then it will be done! thx, John Rose

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