VPS graphs do not work in SolusVM 2: Server Error

Symptoms 

• VPS graphs do not work in SolusVM 2. The following error is displayed at SolusVM 2 > Virtual Servers > VPS > Graph:

  SVM_ERROR: Server Error

• The following error is displayed in the API container log on SolusVM 2 Management node:

  # docker container logs `docker ps| grep solus_api| awk {'print $1'}`
  ...
  production.ERROR: [401] Client error: `POST http://influxdb:8086/api/v2/query?org=solus` resulted in a `401 Unauthorized` response:
  {"code":"unauthorized","message":"unauthorized access"}
  {"userId":1,"exception":"[object] (InfluxDB2\\ApiException(code: 401): [401] Client error: `POST http://influxdb:8086/api/v2/query?org=solus` resulted in a `401 Unauthorized` response:
  {\"code\":\"unauthorized\",\"message\":\"unauthorized access\"}
  ...

Cause

solus_influxdb container data corrupted.

Resolution

1. Connect to SolusVM 2 Management node via SSH

2. Stop solus_influxdb container:

   # docker service scale solus_influxdb=0

3. Backup current container data:

   # mkdir influxdb && mv /usr/local/solus/influxdb/* ./influxdb/

4. Start the container:

   # docker service scale solus_influxdb=1