kolla/releasenotes/notes/upgrade-influxdb-for-monasc...

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---
upgrade:
- |
Monasca now supports InfluxDB 1.7.x, the default version provided by Kolla.
Monasca users can follow the InfluxDB upgrade notes in the guide:
https://docs.influxdata.com/influxdb/v1.7/administration/upgrading/
security:
- In prior versions of InfluxDB, including 1.3.x, InfluxDB incorrectly
ignored tag names starting with a leading underscore. In Monasca
this broke tenant isolation because queries containing
`where _tenant_id = 'some_id'` where not scoped to the tenant_id.
Upgrading to InfluxDB 1.7.x solves this issue.