From 57b2c9d339375fafe202ebc8fd0e3a91f54a36de Mon Sep 17 00:00:00 2001 From: Dave Wysochanski Date: Mon, 4 Feb 2008 20:26:14 +0000 Subject: [PATCH] Fix default preferred_names filter to use /dev/mapper/mpath devices. If these devices exist, we should be using them for multipath rather than any underlying device names. Reference: http://kbase.redhat.com/faq/FAQ_96_11196.shtma bz195685 --- doc/example.conf | 6 ++++-- man/lvm.conf.5 | 6 +++++- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/doc/example.conf b/doc/example.conf index d8cba0e0a..73b69a97a 100644 --- a/doc/example.conf +++ b/doc/example.conf @@ -23,9 +23,11 @@ devices { # same block device and the tools need to display a name for device, # all the pathnames are matched against each item in the following # list of regular expressions in turn and the first match is used. - preferred_names = [ ] + # If device-mapper multipath is used, we should always use the mpath + # devices rather than the underlying paths. + preferred_names = [ "^/dev/mapper/mpath" ] - # preferred_names = [ "^/dev/mpath/", "^/dev/[hs]d" ] + # preferred_names = [ "^/dev/mapper/mpath", "^/dev/[hs]d" ] # A filter that tells LVM2 to only use a restricted set of devices. # The filter consists of an array of regular expressions. These diff --git a/man/lvm.conf.5 b/man/lvm.conf.5 index c67ce94bc..aa92da975 100644 --- a/man/lvm.conf.5 +++ b/man/lvm.conf.5 @@ -84,7 +84,10 @@ Defaults to "/dev". \fBpreferred_names\fP \(em List of patterns compared in turn against all the pathnames referencing the same device in in the scanned directories. The pathname that matches the earliest pattern in the list is the -one used in any output. +one used in any output. As an example, if device mapper multipathing +is used, the following will select multipath device names: +.br +\fBdevices { preferred_names = [ "^/dev/mapper/mpath" ] }\fP .IP \fBfilter\fP \(em List of patterns to apply to devices found by a scan. Patterns are regular expressions delimited by any character and preceded @@ -98,6 +101,7 @@ in /dev), if any name matches any \fBa\fP pattern, the device is accepted; otherwise if any name matches any \fBr\fP pattern it is rejected; otherwise it is accepted. As an example, to ignore /dev/cdrom you could use: +.br \fBdevices { filter=["r|cdrom|"] }\fP .IP \fBcache_dir\fP \(em Persistent filter cache file directory.