Remove overwriting the default value of db_max_retries, instead use
default value defined by oslo.db which is 20.
Adjust the default value of db_max_retries in the release note and sample
configuration file.
Closes-Bug: #1671629
Change-Id: I1e5f632d687c1cebab895cc91958d502b9fce884
Follow up patch of 3428cb74f0a6fe05c23cf00dc66da4c1d9766409
Add information about db_max_retries configuration option to the
release note. Add periods at the end of senteces in the release note.
Change-Id: I2811ce6976d020e32928773ecb872fefa05e10b7
Wrap all DB write operations with oslo_db decorator to retry on
deadlock. DBDeadlock exception can be raised quite often on Galera
clusters under load.
This also fixes an issue which causes conductor's periodic
tasks to stop executing.
Closes-Bug: #1637210
Closes-Bug: #1639338
Co-Authored-By: Vladyslav Drok <vdrok@mirantis.com>
Co-Authored-By: Joanna Taryma <joanna.taryma@intel.com>
Change-Id: I61db83637adfd98a5394d1f570f3de4302c93497