[ ssic-linux-Bugs-1653220 ] Debian SSIFailover uses findfs, but...

Bugs item #1653220, was opened at 2007-02-06 06:50
Message generated for change (Comment added) made by rogertsang
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Category: Booting / init
Group: v1.9.1
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Debian SSIFailover uses findfs, but...

Initial Comment:
findfs looks in /etc/blkid.tab, which doesn't seem to be a cdsl, so it finds the same device on all nodes.  Rather a problem if two nodes have different names for the same device (can happen for example on shared SCSI).

# onall /sbin/findfs UUID=b7c7645c-1d6f-4943-88c0-269ec640f5d3
(node 1)
/dev/sdc1
(node 2)
/dev/sdc1

# onall sh -c 'blkid -c /dev/null  | grep b7c7645c-1d6f-4943-88c0-269ec640f5d3'
(node 1)
/dev/sda1: LABEL="/root" UUID="b7c7645c-1d6f-4943-88c0-269ec640f5d3" SEC_TYPE="ext3" TYPE="ext2"
(node 2)
/dev/sdc1: LABEL="/root" UUID="b7c7645c-1d6f-4943-88c0-269ec640f5d3" SEC_TYPE="ext3" TYPE="ext2"

Need "mklocalfile /etc/blkid.tab"


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>Comment By: Roger Tsang (rogertsang)
Date: 2007-08-12 19:54

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Fixed in 1.9.3

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Comment By: John Hughes (hughesj)
Date: 2007-06-23 06:02

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Fixed even better by my patch to libblkid to make it work if
/etc/blkid.tab is a cdsl

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Comment By: John Hughes (hughesj)
Date: 2007-02-09 05:41

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Fixed by my hack 

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Comment By: Nobody/Anonymous (nobody)
Date: 2007-02-07 05:25

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Easier "fix" just set env var BLKID_FILE to /dev/null before findfs

Same "fix" works for the fsck on nodeup.

Better fix would to be to libblkid to handle case of /etc/blkid.tab being
a symbolic link - need ssi_realpath.


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Comment By: John Hughes (hughesj)
Date: 2007-02-06 11:51

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So, a simple way to fix the problems is to replace:


   DEVICE=`/sbin/findfs $FSDEV`

with 

   DEVICE=`blkid -c /dev/null -t $FSDEV -o device`

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Comment By: John Hughes (hughesj)
Date: 2007-02-06 10:39

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Problem is blkid_flush_cache function writes temporary then uses rename to
move it into place.

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Comment By: John Hughes (hughesj)
Date: 2007-02-06 10:31

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Doesn't quite work - apparently someone rm's blkid.tab on boot.

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Comment By: John Hughes (hughesj)
Date: 2007-02-06 09:17

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Also, should be running blkid on boot or nodeup?


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