I just installed New Relic to play around with it a bit and I noticed that the default installer will try and install a bunch of crap that will, at least in my case fail. HAProxy and MySQL are two that fail miserably because in one case the HAProxy is not setup the way New Relic expects and MySQL us in a Docker container that New Relic is also not expected. In order to get around this you need to install specific parts of new relic. See docs here https://docs.newrelic.com/docs/infrastructure/host-integrations/installation/new-relic-guided-install-overview/