start kapacitor failed

ts=2021-01-14T14:17:30.540+08:00 lvl=error msg="encountered error" service=run err="failed to open diagnostic service: open /var/log/kapacitor/kapacitor.log: permission denied"

ps ： I hava start influxDb and telegraf

Start by reproducing the Kapacitor startup failure and inspect the diagnostic service opening /var/log/kapacitor/kapacitor.log. Confirm the conditions that cause the permission-denied error and check whether the reported InfluxDB and Telegraf setup affects startup. Done means Kapacitor starts without this error, with the diagnostic log handled correctly.

Written by the indexing model from the issue text.