openstack/fuel-library
Code Issues Proposed changes

Fix rabbitMQ OCF monitor detection of running master

Browse Source 
When monitor detected the node as OCF_RUNNING_MASTER, this may be
lost while the monitor checks in progress.
* Rework the prev_rc by the rc_check to fix this.
* Also add info log if detected as running master.
* Break the monitor check loop early, if it shall be exiting to be
  restarted by pacemaker.
* Do not recheck the master status and do not update the master score,
  if the node was already detected by monitor as OCF_RUNNING_MASTER.
  By that point, the running and healthy master shall not be checked
  against other nodes uptime as it is pointless and only takes more
  time and resources for the action monitor to finish.
* Fail early, if monitor detected the node as OCF_RUNNING_MASTER, but
  the rabbit beam process is not running
* For OCF_CHECK_LEVEL>20, exclude the current node from the check
  loop as we already checked it before

Closes-bug: #1531838

Change-Id: I319db307c73ef24d829be44eeb63d1f52f4180fa
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
This commit is contained in:
Bogdan Dobrelya 2016-01-07 13:39:27 +01:00
parent 39aac5a938
commit bde7c0d4a6
1 changed files with 24 additions and 18 deletions
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42
files/fuel-ha-utils/ocf/rabbitmq
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@ -1343,12 +1343,12 @@ wait_sync() {
get_monitor() {
local rc=$OCF_ERR_GENERIC
local LH="${LL} get_monitor():"
local status_master
local status_master=1
local rabbit_running
local name
local node
local nodelist
local prev_rc
local rc_check
local max
local our_uptime
local node_uptime
@ -1372,7 +1372,11 @@ get_monitor() {
ocf_log info "${LH} master attribute is ${status_master}"
if [ $status_master -eq 0 -a $rabbit_running -eq $OCF_SUCCESS ]
then
ocf_log info "${LH} We are the running master"
rc=$OCF_RUNNING_MASTER
elif [ $status_master -eq 0 -a $rabbit_running -ne $OCF_SUCCESS ] ; then
ocf_log err "${LH} We are the master and RMQ-runtime (beam) is not running. this is a failure"
exit $OCF_FAILED_MASTER
fi
fi
get_status rabbit
@ -1382,56 +1386,58 @@ get_monitor() {
if [ $rabbit_running -eq $OCF_SUCCESS ]
then
ocf_log info "${LH} rabbit app is running. checking if we are the part of healthy cluster"
prev_rc=$rc
rc_check=$OCF_ERR_GENERIC
nodelist=$(get_alive_pacemaker_nodes_but)
for node in $nodelist
do
ocf_log info "${LH} rabbit app is running. looking for master on $node"
is_master $node
status_master=$?
ocf_log info "${LH} fetched master attribute for $node. attr value is ${status_master}"
# Do not refetch the master status for *this* node as we know it already
if [ $rc -ne $OCF_RUNNING_MASTER ] ; then
ocf_log info "${LH} rabbit app is running. looking for master on $node"
is_master $node
status_master=$?
ocf_log info "${LH} fetched master attribute for $node. attr value is ${status_master}"
fi
if [ $status_master -eq 0 ] ; then
rc=$OCF_ERR_GENERIC
ocf_log info "${LH} rabbit app is running. master is $node"
if get_running_nodes | grep -q $(rabbit_node_name $node)
then
ocf_log info "${LH} rabbit app is running and is member of healthy cluster"
rc=$prev_rc
rc_check=$OCF_SUCCESS
break
fi
fi
done
[ $rc -eq $OCF_ERR_GENERIC ] && ocf_log err "${LH} rabbit node is running out of the cluster"
[ $rc_check -eq $OCF_ERR_GENERIC ] && ocf_log err "${LH} rabbit node is running out of the cluster"
else
if [ "$OCF_CHECK_LEVEL" -gt 20 ]; then
ocf_log info "${LH} rabbit app is not running. checking if there is a master"
prev_rc=$rc
is_master $THIS_PCMK_NODE
i_am_master=$?
if [ $i_am_master -eq 0 ]; then
# Do not refetch the master status as we know it already
if [ $rc -eq $OCF_RUNNING_MASTER ]; then
ocf_log err "${LH} we are the master and rabbit app is not running. this is a failure"
exit $OCF_FAILED_MASTER
fi
nodelist=$(get_alive_pacemaker_nodes_but)
nodelist=$(get_alive_pacemaker_nodes_but $THIS_PCMK_NODE)
rc_check=$OCF_SUCCESS
for node in $nodelist
do
is_master $node
status_master=$?
ocf_log info "${LH} fetched master attribute for $node. attr value is ${status_master}"
if [ $status_master -eq 0 ] ; then
rc=$OCF_ERR_GENERIC
rc_check=$OCF_ERR_GENERIC
ocf_log info "${LH} rabbit app is not running. master is $node. exiting to be restarted by pacemaker"
break
fi
done
fi
fi
if [ $rc -eq $OCF_ERR_GENERIC ]; then
if [ $rc -eq $OCF_ERR_GENERIC -o $rc_check -eq $OCF_ERR_GENERIC ]; then
ocf_log err "${LH} get_status() returns generic error ${rc}"
ocf_log info "${LH} ensuring this slave does not get promoted."
master_score 0
return $OCF_ERR_GENERIC
else
elif [ $rc -ne $OCF_RUNNING_MASTER ] ; then
ocf_log info "${LH} preparing to update master score for node"
our_uptime=$(srv_uptime)
nodelist=$(get_alive_pacemaker_nodes_but $THIS_PCMK_NODE)