Hi,
On Thu, Jul 12, 2012 at 03:05:28PM +0200, Helmut Wollmersdorfer wrote:
> Hi,
>
>
> today one DomU running mainly Apache, Typo3, MySQL went unusable.
>
> Last message from Nagios:
>
> Ram : 98%, Swap : 100% : 99, 90 : CRITICAL
>
> Logging in with xm console I saw oom-killer messages and did an xm
> destroy.
>
> Is there any solution to automatically destroy and restart a DomU in
> such a case?
You can add the script hook to your xen resource. See:
crm ra info Xen
...
monitor_scripts (string): list of space separated monitor scripts
To additionally monitor services within the unprivileged domain,
add this parameter with a list of scripts to monitor.
...
A script should exit with 0 on success. I guess that you can
just do curl URL which exercises the apache and/or mysql.
Thanks,
Dejan
> The current crm config is as follows (only the relevant part of one
> DomU):
>
>
> xen11:/# crm configure show
> node $id="xxx" xen11
> node $id="yyy" xen10
>
>
> primitive xen_drbd2_1 ocf:linbit:drbd \
> params drbd_resource="drbd2_1" \
> op monitor interval="15s" \
> op start interval="0" timeout="240s" \
> op stop interval="0" timeout="100s"
> primitive xen_drbd2_2 ocf:linbit:drbd \
> params drbd_resource="drbd2_2" \
> op monitor interval="15s" \
> op start interval="0" timeout="240s" \
> op stop interval="0" timeout="100s"
> primitive xen_typo3 ocf:heartbeat:Xen \
> params xmfile="/etc/xen/typo3.cfg" \
> op monitor interval="3s" timeout="30s" \
> op start interval="0" timeout="60s" \
> op stop interval="0" timeout="40s" \
> meta target-role="Started" allow-migrate="false" is-managed="true"
>
>
> group group_drbd2 xen_drbd2_1 xen_drbd2_2
>
> ms DrbdClone2 group_drbd2 \
> meta master_max="1" master-mode-max="1" clone-max="2" clone-node-
> max="1" notify="true"
>
> location cli-prefer-xen_typo3 xen_typo3 \
> rule $id="cli-prefer-rule-xen_typo3" inf: #uname eq xen10
>
> colocation xen_typo3_and_drbd inf: xen_typo3 DrbdClone2:Master
>
> order xen_typo3_after_drbd inf: DrbdClone2:promote xen_typo3:start
>
> property $id="cib-bootstrap-options" \
> dc-version="1.0.9-74392a28b7f31d7ddc86689598bd23114f58978b" \
> cluster-infrastructure="Heartbeat" \
> stonith-enabled="false" \
> no-quorum-policy="ignore" \
> last-lrm-refresh="1331211005" \
> maintenance-mode="false"
> rsc_defaults $id="rsc-options" \
> resource-stickiness="100"
>
>
> TIA
>
> Helmut Wollmersdorfer
>
>
>
>
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