Mysql plugin errors

[Xav Paice]

When related to percona-cluster, the data collection plugin produces the following errors in the telegraf.log:

2021-04-08T06:10:42Z E! [inputs.mysql] Error in plugin: Error 1130: Host '10.5.0.24' is not allowed to connect to this MySQL server

Bundle:

series: xenial
applications:
  percona-cluster:
    charm: cs:percona-cluster-295
    num_units: 1
    to:
    - "0"
  prometheus:
    charm: cs:prometheus2-21
    num_units: 1
    to:
    - "1"
  telegraf:
    charm: local:xenial/telegraf-1
machines:
  "0": {}
  "1": {}
relations:
- - percona-cluster:juju-info
  - telegraf:juju-info
- - percona-cluster:db-admin
  - telegraf:mysql
- - prometheus:target
  - telegraf:prometheus-client

[Eric Chen (eric-chen)]

This issue was pending long time.
Furthermore, soon or later, the monitoring system will migrate to COS. Telegraf will be replaced by grafana-agent. Therefore, we won't follow up this issue. But welcome to reopen it when anyone encounter this issue again.
(https://charmhub.io/topics/canonical-observability-stack)