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parsingautomationconfiglvm

Tool for edit lvm.conf file

is there any lvm.conf editor?

I'm trying to set global_filter, use_lvmtad and some other options, currently using sed:

sed -i /etc/lvm/lvm.conf \
      -e "s/use_lvmetad = 1/use_lvmetad = 0/" \
      -e "/^ *[^#] *global_filter/d" \
      -e "/^devices {/a\        global_filter = [ \"r|/dev/drbd.*|\", \"r|/dev/dm-.*|\", \"r|/dev/zd.*|\" ]"

but I don't like this too much, is there any better way?

I found only lvmconfig tool, but it can only display certain configuration sections, and can't edit them.

Solution

  • It seems that augtool is exactly what I was looking for.

    These two packages should be enough to proper processing lvm.conf file:

    apt install augeas-tools augeas-lenses

    Example usage:

    augtool print /files/etc/lvm/lvm.conf

    And you should get the whole parse tree on stdout.

    If the parser fails you won’t get any output, print the error message using:

    augtool print /files/etc/lvm/lvm.conf/error

    The augtool equivalent for the sed command from the original question:

    augtool -s <<EOT
set /files/etc/lvm/lvm.conf/global/dict/use_lvmetad/int "0"
rm /files/etc/lvm/lvm.conf/devices/dict/global_filter
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/0/str "r|^/dev/drbd.*|"
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/1/str "r|/dev/dm-.*|"
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/2/str "r|/dev/zd.*|"
EOT