This release addresses multiple issues related to fault recoveries, with a particular focus on retryable database errors that may occur when using Icinga DB with database clusters.
Since there may be a large number of errors that are resolved by retrying after a certain amount of time, #698 changed the retry behavior to retry every database-related error for five minutes. This helps Icinga DB survive network hiccups or more complicated database situations, such as working with a database cluster.
The latter was specifically addressed in #711 for Galera Clusters on MySQL or MariaDB by configuring wsrep_sync_wait
on used database sessions. Galera users should refer to the Configuration documentation for more details.
In summary, the most notable changes are as follows:
- Custom Variables: Render large numbers as-is, not using scientific notation. #657
- Enhance retries for database errors and other failures for up to five minutes. #693, #698, #739, #740
- MySQL/MariaDB: Use strict SQL mode. #699
- MySQL/MariaDB Galera Cluster: Set
wsrep_sync_wait
for cluster-wide causality checks. #711 - Don't crash history sync in the absence of Redis®*. #725
- Update dependencies. 27 times
Schema
In addition to mandatory schema upgrades, this release includes an optional upgrade that can be applied subsequently. Details are available in the Upgrading documentation and #656.
All schema changes are listed below: