Workaround for starting influxdb on a Raspberry Pi

The last few updates to influxdb have had a deliterious effect on operations on my Raspberry Pi 3B. Two things have determined this workaround:

1. The provided startup system is complex with apparent interactions between influxdb.service and init.sh.
2. Just running influxd on the command line results in the database working as expected.

I don't doubt that this complexity is useful in some installations, but is not necessary in mine. Using systemd to start a simple daemon will suffice. Below is the influxdb.service file I'm using to work around the issue. YMMV.

Some original lines are commented out, some of those are replaced by different versions.

# If you modify this, please also make sure to edit init.sh

[Unit]
Description=InfluxDB is an open-source, distributed, time series database
Documentation=https://docs.influxdata.com/influxdb/
After=network-online.target

[Service]
User=influxdb
Group=influxdb
#LimitNOFILE=65536
EnvironmentFile=-/etc/default/influxdb
#ExecStart=/usr/lib/influxdb/scripts/influxd-systemd-start.sh
ExecStart=/usr/bin/influxd
#KillMode=control-group
Restart=on-failure
#Type=forking
Type=simple
#PIDFile=/var/lib/influxdb/influxd.pid

[Install]
WantedBy=multi-user.target
Alias=influxd.service