dotnet-monitor and OpenTelemetry? - asp.net-core

Question

I'm learning OpenTelemetry and I wonder how dotnet-monitor is connected with OpenTelemetry (Meter). Are those things somehow connected or maybe dotnet-monitor is just custom MS tools that is not using standards from OpenTelemetry (API, SDK and exporters).

Answer 1

If you run dotnet-monitor on your machine it exposes the dotnet metrics in Prometheus format which mean you can set OpenTelemetry collector to scrape those metrics
For example in OpenTelemetry-collector-contrib configuration
receivers:
prometheus_exec:
exec: dotnet monitor collect
port: 52325
Please note that for dotnet-monitor to run you need to create a setting.json in theis path:
$XDG_CONFIG_HOME/dotnet-monitor/settings.json
If $XDG_CONFIG_HOME is not defined, create the file in this path:
$HOME/.config/dotnet-monitor/settings.json
If you want to identify the process by its PID, write this into settings.json (change Value to your PID):
{
"DefaultProcess": {
"Filters": [{
"Key": "ProcessId",
"Value": "1"
}]
}
}
If you want to identify the process by its name, write this into settings.json (change Value to your process name):
{
"DefaultProcess": {
"Filters": [{
"Key": "ProcessName",
"Value": "iisexpress"
}]
},
}
In my example I used this configuration:
{
"DefaultProcess": {
"Filters": [{
"Key": "ProcessId",
"Value": "1"
}]
},
"Metrics": {
"Providers": [
{
"ProviderName": "System.Net.Http"
},
{
"ProviderName": "Microsoft-AspNetCore-Server-Kestrel"
}
]
}
}