openstack/puppet-tripleo
Code Issues Proposed changes

Add configurable monitor timeouts for ovn dbs

Browse Source 
Under pressure, the default monitor timeout value of 20 seconds is not
enough to prevent unnecessary failovers of the ovn-dbs pacemaker resource.
While spawning a few VMs in the same time this could lead to unnecessary
movements of master DB, then re-connections of ovn-controllers (slaves are
read-only), further peaks of load on DBs, and at the end it could lead to
snowball effect. Now this value can be configurable by dbs_timeout in
tripleo::profile::pacemaker::ovn_dbs_bundle and by default is set to 60s.

Change-Id: Ib95c6b7614631eed264d42e6cf61672b705e7893
Signed-off-by: Kamil Sambor <ksambor@redhat.com>
Partial-Bug: #1853000
(cherry picked from commit 15e21010a8)
This commit is contained in:
Kamil Sambor 2019-10-17 15:30:58 +02:00
parent 7c9561bd5b
commit 95a7f217e2
2 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
manifests/profile/pacemaker/ovn_dbs_bundle.pp
View File

@ -77,6 +77,10 @@
# configuration. It's only used if internal TLS is enabled.
# Defaults to undef
#
# [*dbs_timeout*]
# (Optional) timeout for monitor of ovn dbs resource
# Defaults to 60
#
class tripleo::profile::pacemaker::ovn_dbs_bundle (
$ovn_dbs_docker_image = hiera('tripleo::profile::pacemaker::ovn_dbs_bundle::ovn_dbs_docker_image', undef),
@ -93,6 +97,7 @@ class tripleo::profile::pacemaker::ovn_dbs_bundle (
$tls_priorities = hiera('tripleo::pacemaker::tls_priorities', undef),
$enable_internal_tls = hiera('enable_internal_tls', false),
$ca_file = undef,
$dbs_timeout = hiera('tripleo::profile::pacemaker::ovn_dbs_bundle::dbs_timeout', 60),
) {
if $::hostname == downcase($bootstrap_node) {
@ -203,7 +208,8 @@ nb_master_protocol=ssl sb_master_protocol=ssl"
pacemaker::resource::ocf { "${ovndb_servers_resource_name}":
ocf_agent_name => "${ovndb_servers_ocf_name}",
master_params => '',
op_params => 'start timeout=200s stop timeout=200s',
op_params => "start timeout=200s stop timeout=200s monitor interval=10s role=Master timeout=${dbs_timeout}s \
monitor interval=30s role=Slave timeout=${dbs_timeout}s",
resource_params => $resource_map,
tries => $pcs_tries,
location_rule => $ovn_dbs_location_rule,

10
releasenotes/notes/setup_timeouts_ovn_dbs-630a7ccfda5976a5.yaml Normal file
View File

@ -0,0 +1,10 @@
---
features:
- |
Under pressure, the default monitor timeout value of 20 seconds is not
enough to prevent unnecessary failovers of the ovn-dbs pacemaker resource.
While spawning a few VMs in the same time this could lead to unnecessary
movements of master DB, then re-connections of ovn-controllers (slaves are
read-only), further peaks of load on DBs, and at the end it could lead to
snowball effect. Now this value can be configurable by dbs_timeout in
tripleo::profile::pacemaker::ovn_dbs_bundle and by default is set to 60s.