Influxdb Ubuntu 16.04 Start up problem

I have a web program that will connect to influxdb. When I want this program to start automatically, I write a startup script and put it in rc.local, but I can't connect to influxdb every time I restart

Start by reproducing the startup sequence on Ubuntu 16.04 using the rc.local startup script and the web program's connection to InfluxDB. Capture the startup and connection behavior across a reboot; done means the program can reliably connect to InfluxDB after automatic startup.

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