Is it possible that "virsh destroy" does not stop a domain ?
Hi,
Is it possible that "virsh destroy" does not stop a domain ?
I'm asking because i have some domains running in a two-node HA-Cluster (pacemaker).
And sometimes one node get fenced (killed) because it couldn't stop a domain.
That's very ugly.
This is also the reason why i asked before what "virsh destroy" really does ?
IIRC a kill -9 can't terminate a process which is in "D" state
(uninterruptible sleep).
So if the process of the domain is in "D" state, it can't be finished. Right
?
Pacemaker tries to shutdown or destroy a domain with a resource agent, which is a shell
script, similar
to an init script.
Here is an excerp from the resource agent for virtual domains:
force_stop()
{
local out ex translate
local status=0
ocf_log info "Issuing forced shutdown (destroy) request for domain
${DOMAIN_NAME}."
out=$(LANG=C virsh $VIRSH_OPTIONS destroy ${DOMAIN_NAME} 2>&1)
# hier wird die domain destroyed
ex=$?
translate=$(echo $out|tr 'A-Z' 'a-z')
echo >&2 "$translate"
case $ex$translate in
*"error:"*"domain is not
running"*|*"error:"*"domain not found"*|\
*"error:"*"failed to get domain"*)
: ;; # unexpected path to the intended outcome, all is well
sucess
[!0]*)
ocf_exit_reason "forced stop failed" #
<============ fail of destroy seems to be possible
return $OCF_ERR_GENERIC ;;
0*)
while [ $status != $OCF_NOT_RUNNING ]; do
VirtualDomain_status
status=$?
done ;;
esac
return $OCF_SUCCESS
}
The function force_stop is responsible for stop/destroy the domain.
And it cares about a non-working "virsh destroy".
Is there a developer who can explain what "virsh destroy" really does ?
Or is there another ML for the developers ?
Bernd
--
Bernd Lentes
Systemadministration
Institute for Metabolism and Cell Death (MCD)
Building 25 - office 122
HelmholtzZentrum München
bernd.lentes(a)helmholtz-muenchen.de
phone: +49 89 3187 1241
phone: +49 89 3187 3827
fax: +49 89 3187 2294
http://www.helmholtz-muenchen.de/mcd
stay healthy
Helmholtz Zentrum München
Helmholtz Zentrum München