[Linux-cluster] falied to implement HA-LVM with clvmd rhcs5.6

dOminic share2dom at gmail.com
Fri Feb 4 15:23:02 UTC 2011 

Hi Shalom,

Are you still facing problem implementing HA-LVM with locking_type = 3
setting ?. If yes, it would be great if you could provide the following
details .
So that others can also check

* steps you are following along with complete output
* status in "clustat" after making changes in cluster.conf
* attach cluster.conf and /var/log/messages.

dominic

On Fri, Feb 4, 2011 at 8:34 PM, שלום קלמר <sklemer at gmail.com> wrote:

> Thanks.
>
> This is the old methos and its work great but its hard to maintain such
> cluster.
>
> Shalom.
>
>
> On Fri, Feb 4, 2011 at 4:32 PM, Dominic Geevarghese <share2dom at gmail.com>wrote:
>
>>
>> Hi,
>>
>> I am not sure about the error you are getting but it would be great if you
>> could try the preferred method
>>
>> locking_type = 1
>> volume_list [ "your-root-vg-name" , "@hostname" ]
>>
>> rebuild initrd
>>
>> add the <lvm> and <fs> resources in cluster.conf , start the cman,
>> rgmanager .
>>
>>
>> Thanks,
>>
>> On Thu, Feb 3, 2011 at 8:02 PM, Corey Kovacs <corey.kovacs at gmail.com>wrote:
>>
>>> Excellent,
>>>
>>>
>>> Thanks
>>>
>>> -C
>>>
>>> On Thu, Feb 3, 2011 at 10:38 AM, שלום קלמר <sklemer at gmail.com> wrote:
>>> >
>>> >
>>> > On Thu, Feb 3, 2011 at 12:35 PM, שלום קלמר <sklemer at gmail.com> wrote:
>>> >>
>>> >>
>>> >>
>>> >> https://access.redhat.com/kb/docs/DOC-3068
>>> >>
>>> >> On Thu, Feb 3, 2011 at 11:13 AM, Corey Kovacs <corey.kovacs at gmail.com
>>> >
>>> >> wrote:
>>> >>>
>>> >>> Is using ha-lvm with clvmd a new capability? It's always been my
>>> >>> understanding that the lvm locking type for using ha-lvm had to be
>>> set
>>> >>> to '1'.
>>> >>>
>>> >>> I'd much rather be using clvmd if it is the way to go. Can you point
>>> >>> me to the docs you are seeing these instructions in please?
>>> >>>
>>> >>> As for why your config isn't working, clvmd requires that it's
>>> >>> resources are indeed tagged as cluster volumes, so you might try
>>> doing
>>> >>> that and see how it goes.
>>> >>>
>>> >>> -C
>>> >>>
>>> >>> On Thu, Feb 3, 2011 at 7:26 AM, שלום קלמר <sklemer at gmail.com> wrote:
>>> >>> > Hello.
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > I followed redhat instruction trying install HA-LVM with clvmd. (
>>> rhcs
>>> >>> > 5.6 -
>>> >>> > rgmanager 2.0.52-9 )
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > I can't make it work.
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > lvm.conf- locking_type=3
>>> >>> >
>>> >>> > clvmd work
>>> >>> >
>>> >>> > Its failed saying HA-LVM is not configured correctly.
>>> >>> >
>>> >>> > The manual said that we should run "lvchange -a n lvxx" edit the
>>> >>> > cluster.conf & start the service.
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > But From lvm.conf :
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > case $1 in
>>> >>> >
>>> >>> > start)
>>> >>> >
>>> >>> >         if ! [[ $(vgs -o attr --noheadings $OCF_RESKEY_vg_name) =~
>>> >>> > .....c
>>> >>> > ]]; then
>>> >>> >
>>> >>> >                 ha_lvm_proper_setup_check || exit 1
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > If the vg is not taged as cluster than the ha_lvm is looking for
>>> >>> > volume_list
>>> >>> > in lvm.conf.
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > I am confused- Does the VG should taged as cluster ??  ( BTW - the
>>> old
>>> >>> > fashion HA-LVM is worked with no problems )
>>> >>> >
>>> >>> > redhat instructions :
>>> >>> >
>>> >>> > To set up HA LVM Failover (using the preferred CLVM variant),
>>> perform
>>> >>> > the
>>> >>> > following steps:
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > 1. Ensure that the parameter locking_type in the global section
>>> >>> > of /etc/lvm/lvm.conf is set to the value '3', that all the
>>> necessary
>>> >>> > LVM
>>> >>> > cluster packages are installed, and the necessary daemons are
>>> started
>>> >>> > (like
>>> >>> > 'clvmd' and the cluster mirror log daemon - if necessary).
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > 2. Create the logical volume and filesystem using standard LVM2 and
>>> >>> > file
>>> >>> > system commands. For example:
>>> >>> >
>>> >>> > # pvcreate /dev/sd[cde]1
>>> >>> >
>>> >>> >  # vgcreate <volume group name> /dev/sd[cde]1
>>> >>> >
>>> >>> >  # lvcreate -L 10G -n <logical volume name> <volume group name>
>>> >>> >
>>> >>> >  # mkfs.ext3 /dev/<volume group name>/<logical volume name>
>>> >>> >
>>> >>> >  # lvchange -an <volume group name>/<logical volume name>
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > 3. Edit /etc/cluster/cluster.conf to include the newly created
>>> logical
>>> >>> > volume as a resource in one of your services. Alternatively,
>>> >>> > configuration
>>> >>> > tools such as Conga or system-config-cluster may be used to create
>>> >>> > these
>>> >>> > entries.  Below is a sample resource manager section
>>> >>> > from /etc/cluster/cluster.conf:
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > <rm>      <failoverdomains>        <failoverdomain name="FD"
>>> >>> > ordered="1"
>>> >>> > restricted="0">           <failoverdomainnode name="neo-01"
>>> >>> > priority="1"/>
>>> >>> >           <failoverdomainnode name="neo-02" priority="2"/>
>>> >>> > </failoverdomain>    </failoverdomains>    <resources>        <lvm
>>> >>> > name="lvm" vg_name="shared_vg" lv_name="ha-lv"/>        <fs
>>> name="FS"
>>> >>> > device="/dev/shared_vg/ha-lv" force_fsck="0" force_unmount="1"
>>> >>> > fsid="64050"
>>> >>> > fstype="ext3" mountpoint="/mnt" options="" self_fence="0"/>
>>> >>> > </resources>
>>> >>> >    <service autostart="1" domain="FD" name="serv"
>>> recovery="relocate">
>>> >>> >        <lvm ref="lvm"/>        <fs ref="FS"/>    </service> </rm>
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > Regards
>>> >>> >
>>> >>> > Shalom.
>>> >>> >
>>> >>> >
>>> >>> >
>>> >>> > --
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>>> >>> >
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