By default ProxySQL's default value of max_replication_lag
is 0 which is in fact disabling this feature [1].
If it is greater than 0, ProxySQL will regularly monitor
replication lag and if it goes beyond the configured threshold
it will temporary shun the host until replication catches up.
This should be configurable via kolla-ansible as every
openstack deployment can be different in terms of network
delays, database load etc.. , so user should have option
to configure when database backend will be shunned.
[1] https://proxysql.com/documentation/main-runtime/
Change-Id: I66171638abc712cb84b380042f1d29f54c499e73
Kolla environment currently uses haproxy
to fullfill HA in mariadb. This patch
is switching haproxy to proxysql if enabled.
This patch is also replacing mariadb's user
'haproxy' with user 'monitor'. This replacement
has two reasons:
- Use better name to "monitor" galera claster
as there are two services using this user
(HAProxy, ProxySQL)
- Set password for monitor user as it's
always better to use password then not use.
Previous haproxy user didn't use password
as it was historically not possible with
haproxy and mariadb-clustercheck wasn't
implemented.
Depends-On: https://review.opendev.org/c/openstack/kolla/+/769385
Depends-On: https://review.opendev.org/c/openstack/kolla/+/765781
Depends-On: https://review.opendev.org/c/openstack/kolla/+/850656
Change-Id: I0edae33d982c2e3f3b5f34b3d5ad07a431162844
Allow operators to set haproxy socket to admin level.
This is done via the flag haproxy_socket_level_admin which
is set to "no" by default.
Closes-Bug: 1960215
Signed-off-by: Imran Hussain <ih@imranh.co.uk>
Change-Id: Ia0da89288d68f5803ace1934c013053f12343195
The check condition is similar to the previous if and it can be merged
Signed-off-by: Seena Fallah <seenafallah@gmail.com>
Change-Id: I62213d91945de42ffc87ecad1e96fa4fc0760f10
For now role haproxy is maintaining haproxy
and keepalived. In follow-up changes there is also
proxysql added.
This patch is *only* renaming/moving stuff to more
prominent role loadbalancer, and moving also specific
templates to subdirectory.
This was done only to better diff in follow-up
changes.
Change-Id: I1d39d5bcaefc4016983bf267a2736b742cc3a555
