dejanmm at fastmail
Sep 23, 2010, 3:53 AM
Post #2 of 5
(358 views)
Permalink
|
|
Re: [PATCH 2/2] LVM: accept multiple volume groups
[In reply to]
|
|
Hi,
On Tue, Sep 07, 2010 at 03:55:49PM -0400, Michael Smith wrote:
> Allow the LVM RA to handle multiple volume groups.
Interestingly so far nobody asked for this feature. Can you show
your use case?
> Correct the documentation to refer to volume groups, not volumes.
>
> Allow "status" operation to skip "vgck" if so configured, in order to
> save time if CLVM is hanging.
>
> Allow an unsuccessful "stop" to be ignored if so configured, as required
> in some CLVM setups.
>
> Remove double-check to simplify "validate-all" routine.
Many thanks for the contribution, but I can't accept it as is nor
comment. It needs to be split into several patches, each of them
containing only one functional change or fix.
Cheers,
Dejan
> Signed-off-by: Michael Smith <msmith [at] cbnco>
>
> --- LVM.7200186935f1-plus-partial 2010-09-07 15:29:42.000000000 -0400
> +++ LVM 2010-08-31 17:27:10.000000000 -0400
> @@ -20,9 +20,6 @@
> #
> # See usage() function below for more details...
> #
> -# OCF parameters are as below:
> -# OCF_RESKEY_volgrpname
> -#
> #######################################################################
> # Initialization:
>
> @@ -38,12 +35,12 @@
> cat <<-!
> usage: $0 $methods
>
> - $0 manages an Linux Volume Manager volume (LVM) as an HA resource
> + $0 manages a Linux Volume Manager (LVM) volume group as an HA resource
>
> - The 'start' operation brings the given volume online
> - The 'stop' operation takes the given volume offline
> - The 'status' operation reports whether the volume is available
> - The 'monitor' operation reports whether the volume seems present
> + The 'start' operation activates all volumes in the group
> + The 'stop' operation deactivates all volumes in the group
> + The 'status' operation reports whether at least one LV is available
> + The 'monitor' operation reports whether the LVM metadata is sane
> The 'validate-all' operation checks whether the OCF parameters are valid
> The 'methods' operation reports on the methods $0 supports
>
> @@ -60,33 +57,65 @@
> <version>1.0</version>
>
> <longdesc lang="en">
> -Resource script for LVM. It manages an Linux Volume Manager volume (LVM)
> -as an HA resource.
> +Resource script for LVM. It makes all logical volumes available on one or more
> +volume groups - useful after clvmd starts up.
> </longdesc>
> -<shortdesc lang="en">Controls the availability of an LVM Volume Group</shortdesc>
> +<shortdesc lang="en">Makes logical volume groups available</shortdesc>
>
> <parameters>
> -<parameter name="volgrpname" unique="0" required="1">
> +<parameter name="volgrpname" unique="0" required="0">
> <longdesc lang="en">
> -The name of volume group.
> +The name of the volume group. Deprecated - use volgrpnames.
> </longdesc>
> <shortdesc lang="en">Volume group name</shortdesc>
> <content type="string" default="" />
> </parameter>
> +
> +<parameter name="volgrpnames" unique="0" required="0">
> +<longdesc lang="en">
> +Optional space-separated list of volume group names. If not specified,
> +all volume groups will be used.
> +</longdesc>
> +<shortdesc lang="en">Volume group names</shortdesc>
> +<content type="string" default="" />
> +</parameter>
> +
> <parameter name="exclusive" unique="0" required="0">
> <longdesc lang="en">
> -If set, the volume group will be activated exclusively.
> +If set, the volume groups will be activated exclusively.
> </longdesc>
> <shortdesc lang="en">Exclusive activation</shortdesc>
> <content type="string" default="false" />
> </parameter>
> +
> +<parameter name="vgck" unique="0" required="0">
> +<longdesc lang="en">
> +If true (default), the monitor operation will call vgck in addition to checking
> +status using vgdisplay. You may wish to disable this if you are concerned
> +about timeouts when storage is unavailable.
> +</longdesc>
> +<shortdesc lang="en">Run vgck in monitor operation</shortdesc>
> +<content type="string" default="true" />
> +</parameter>
> +
> +<parameter name="checkstop" unique="0" required="0">
> +<longdesc lang="en">
> +If true (default), the stop operation will verify that the volume groups
> +no longer have any active volumes. You may wish to disable this in a CLVM
> +setup with no exclusive locking, where deactivating the volumes doesn't always
> +work and where failing to deactivate the volumes isn't fatal.
> +</longdesc>
> +<shortdesc lang="en">Check that volume groups have actually stopped</shortdesc>
> +<content type="string" default="true" />
> +</parameter>
> +
> </parameters>
>
> <actions>
> -<action name="start" timeout="30" />
> -<action name="stop" timeout="30" />
> -<action name="status" timeout="30" />
> -<action name="monitor" depth="0" timeout="30" interval="10" />
> +<action name="start" timeout="70" />
> +<action name="stop" timeout="70" />
> +<action name="status" timeout="70" />
> +<action name="monitor" depth="0" timeout="70" interval="10" />
> <action name="methods" timeout="5" />
> <action name="meta-data" timeout="5" />
> <action name="validate-all" timeout="5" />
> @@ -117,10 +146,10 @@
> if
> [ "$LVM_MAJOR" -eq "1" ]
> then
> - vgdisplay $1 2>&1 | grep -i 'Status.*available' 2>&1 >/dev/null
> + vgdisplay $@ 2>&1 | grep -q -i 'Status.*available'
> return $?
> else
> - vgdisplay -v $1 2>&1 | grep -i 'Status[ \t]*available' 2>&1 >/dev/null
> + vgdisplay -v $@ 2>&1 | grep -q -i 'Status[ \t]*available'
> return $?
> fi
> }
> @@ -133,11 +162,11 @@
> if
> [ "$LVM_MAJOR" -eq "1" ]
> then
> - VGOUT=`vgdisplay $1 2>&1`
> + VGOUT=`vgdisplay $@ 2>&1`
> echo "$VGOUT" | grep -i 'Status.*available' >/dev/null
> rc=$?
> else
> - VGOUT=`vgdisplay -v $1 2>&1`
> + VGOUT=`vgdisplay -v $@ 2>&1`
> echo "$VGOUT" | grep -i 'Status[ \t]*available' >/dev/null
> rc=$?
> fi
> @@ -145,18 +174,18 @@
> if
> [ $rc -eq 0 ]
> then
> - : Volume $1 is available
> + : Volumes are available
> else
> - ocf_log debug "LVM Volume $1 is not available (stopped)"
> + ocf_log debug "No volumes available (groups: ${@:-all}) (stopped)"
> return $OCF_NOT_RUNNING
> fi
>
> if
> echo "$VGOUT" | grep -i 'Access.*read/write' >/dev/null
> then
> - ocf_log debug "Volume $1 is available read/write (running)"
> + ocf_log debug "Volumes are available read/write (running)"
> else
> - ocf_log debug "Volume $1 is available read-only (running)"
> + ocf_log debug "Volumes are available read-only (running)"
> fi
>
> return $OCF_SUCCESS
> @@ -172,13 +201,17 @@
> then
> : OK
> else
> - ocf_log info "LVM Volume $1 is offline"
> + ocf_log info "All volumes are offline (groups: ${@:-all})"
> return $OCF_NOT_RUNNING
> fi
>
> - vgck $1 >/dev/null 2>&1
> -
> - return $?
> + if [ -z "$OCF_RESKEY_vgck" ] || ocf_is_true "${OCF_RESKEY_vgck}"
> + then
> + vgck $1 >/dev/null 2>&1
> + return $?
> + else
> + return $OCF_SUCCESS
> + fi
> }
>
> #
> @@ -186,9 +219,7 @@
> #
> LVM_start() {
>
> - # TODO: This MUST run vgimport as well
> -
> - ocf_log info "Activating volume group $1"
> + ocf_log info "Activating logical volumes (groups: ${@:-all})"
>
> if [ "$LVM_MAJOR" -eq "1" ]; then
> ocf_run vgscan $1
> @@ -203,38 +234,66 @@
>
> # Activate the VG in partial.
> # This is needed for mirrored LV
> - ocf_run vgchange -a $active_mode --partial $1 || return $OCF_ERR_GENERIC
> + ocf_run vgchange -a $active_mode --partial $@ || return $OCF_ERR_GENERIC
>
> - if LVM_status $1; then
> - : OK Volume $1 activated just fine!
> + if LVM_status $@; then
> + : OK Volume $@ activated just fine!
> return $OCF_SUCCESS
> else
> - ocf_log err "LVM: $1 did not activate correctly"
> + ocf_log err "LVM: Volume groups (${@:-all}) did not activate correctly"
> return $OCF_NOT_RUNNING
> fi
> }
>
> #
> -# Disable the LVM volume
> +# Make all volumes unavailable.
> #
> LVM_stop() {
>
> - vgdisplay "$1" 2>&1 | grep 'Volume group .* not found' >/dev/null && {
> - ocf_log info "Volume group $1 not found"
> - return 0
> - }
> - ocf_log info "Deactivating volume group $1"
> - ocf_run vgchange -a ln $1 || return 1
> + vgs_active=
> + if [ -z "$@" ]
> + then
> + vgdisplay 2>&1 | grep -q 'Volume group .* not found' && {
> + ocf_log info "No volume groups found"
> + return $OCF_SUCCESS
> + }
> + else
> + for i in $@
> + do
> + if vgdisplay $i 2>&1 | grep -q 'Volume group .* not found'
> + then
> + ocf_log info "Volume group $i not found"
> + else
> + vgs_active="$vgs $i"
> + fi
> +
> + if [ -z "$vgs_active" ]
> + then
> + ocf_log info "No volume groups found."
> + return $OCF_SUCCESS
> + fi
> + done
> + fi
> +
> + ocf_log info "Deactivating logical volumes (groups: ${vgs_active:-all})"
> + ocf_run vgchange --available ln $vgs_active
> + rc=$?
>
> - if
> - LVM_status $1
> + if [ -z "$OCF_RESKEY_checkstop" ] || ocf_is_true "$OCF_RESKEY_checkstop"
> then
> - ocf_log err "LVM: $1 did not stop correctly"
> - return $OCF_ERR_GENERIC
> + if [ $rc -ne 0 ]
> + then
> + ocf_log err "Volume groups (${vgs_active:-all}) failed to stop"
> + return $OCF_ERR_GENERIC
> + fi
> +
> + if
> + LVM_status $1
> + then
> + ocf_log err "Volume groups (${vgs_active:-all}) still running after stop"
> + return $OCF_ERR_GENERIC
> + fi
> fi
> -
> - # TODO: This MUST run vgexport as well
> -
> return $OCF_SUCCESS
> }
>
> @@ -245,24 +304,10 @@
> check_binary $AWK
>
> # Off-the-shelf tests...
> - vgck "$VOLUME" >/dev/null 2>&1
> + vgck $@ >/dev/null 2>&1
>
> if [ $? -ne 0 ]; then
> - ocf_log err "Volume group [$VOLUME] does not exist or contains error!"
> - exit $OCF_ERR_GENERIC
> - fi
> -
> -# Double-check
> - if
> - [ "$LVM_MAJOR" -eq "1" ]
> - then
> - vgdisplay "$VOLUME" >/dev/null 2>&1
> - else
> - vgdisplay -v "$VOLUME" >/dev/null 2>&1
> - fi
> -
> - if [ $? -ne 0 ]; then
> - ocf_log err "Volume group [$VOLUME] does not exist or contains error!"
> + ocf_log err "Volume groups (${@:-all}) failed vgck!"
> exit $OCF_ERR_GENERIC
> fi
>
> @@ -291,15 +336,6 @@
> *) ;;
> esac
>
> -if
> - [ -z "$OCF_RESKEY_volgrpname" ]
> -then
> -# echo "You must identify the volume group name!"
> - ocf_log err "You must identify the volume group name!"
> -# usage
> - exit $OCF_ERR_ARGS
> -fi
> -
> # Get the LVM version number, for this to work we assume(thanks to panjiam):
> #
> # LVM1 outputs like this
> @@ -328,26 +364,26 @@
> fi
> LVM_MAJOR="${LVM_VERSION%%.*}"
>
> -VOLUME=$OCF_RESKEY_volgrpname
> +VOLUMES="$OCF_RESKEY_volgrpname $OCF_RESKEY_volgrpnames"
>
> # What kind of method was invoked?
> case "$1" in
>
> - start) LVM_start $VOLUME
> + start) LVM_start $VOLUMES
> exit $?;;
>
> - stop) LVM_stop $VOLUME
> + stop) LVM_stop $VOLUMES
> exit $?;;
>
> - status) LVM_report_status $VOLUME
> + status) LVM_report_status $VOLUMES
> exit $?;;
>
> - monitor) LVM_monitor $VOLUME
> + monitor) LVM_monitor $VOLUMES
> exit $?;;
>
> - validate-all) LVM_validate_all
> + validate-all) LVM_validate_all $VOLUMES
> ;;
>
> *) usage
> - exit $OCF_ERR_AEGS;;
> + exit $OCF_ERR_ARGS;;
> esac
> _______________________________________________________
> Linux-HA-Dev: Linux-HA-Dev [at] lists
> http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev
> Home Page: http://linux-ha.org/
_______________________________________________________
Linux-HA-Dev: Linux-HA-Dev [at] lists
http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev
Home Page: http://linux-ha.org/
|
