[FR] Add tracing support (#6211)

* [FR] Add tracing support
Fixes #6208

* move checks out of manage.py

* fixed reqs

* small cleanup

* move tracing init to settings
similar to how sentry is handled

* rephrase

* clean up imports

* added argument regarding console debugging

* fix typing

* added auth section

* remove empty headers

* made protocol configurable

* rename vars & cleanup template

* more docs for template

* add docs

InvenTree/config_template.yaml

@@ -136,6 +136,25 @@ sentry_enabled: False
 #sentry_sample_rate: 0.1
 #sentry_dsn: https://custom@custom.ingest.sentry.io/custom
 
+# OpenTelemetry tracing/metrics - disabled by default
+# This can be used to send tracing data, logs and metrics to OpenTelemtry compatible backends
+# See https://opentelemetry.io/ecosystem/vendors/ for a list of supported backends
+# Alternatively, use environment variables eg. INVENTREE_TRACING_ENABLED, INVENTREE_TRACING_HEADERS, INVENTREE_TRACING_AUTH
+#tracing:
+#  enabled: true
+#  endpoint: https://otlp-gateway-prod-eu-west-0.grafana.net/otlp
+#  headers:
+#    api-key: 'sample'
+#  auth:
+#    basic:
+#      username: '******'
+#      password: 'glc_****'
+#  is_http: true
+#  append_http: true
+#  console: false
+#  resources:
+#    CUSTOM_KEY: 'CUSTOM_VALUE'
+
 # Set this variable to True to enable InvenTree Plugins
 # Alternatively, use the environment variable INVENTREE_PLUGINS_ENABLED
 plugins_enabled: False