i've been monitoring a #phoenix app with otelcol, prom_ex, and #signoz, using client tls certs for the otlp. it's been very useful and awesome to have a 100% foss monitoring stack
if you're monitoring anything that has protected data (e.g. PHI, PII, etc.), it's simple enough to run on your own infra and not worry about BAAs with the relics or dogs of the world