dt_metadata_explainer.py

import json

# Dynatrace provide a "magic" file called "dt_metadata_e617c525669e072eebe3d0f08212e8f2.json" that
# contains additional metadata. The file always has this name.
# Magic metadata file explainer: https://www.dynatrace.com/support/help/shortlink/enrich-metrics
# Usage in OT: https://www.dynatrace.com/support/help/shortlink/opent-python#send


service_props =  {"service.name": "FlaskApp"}
try:
    with open("dt_metadata_e617c525669e072eebe3d0f08212e8f2.json") as fp:
        metadata_file = fp.read() # Gets the file path that is in the file
        print("%28.28s: %s" % ("Metadata file contents", metadata_file))
        # Open the file at the provided path
        opened_metadata_file = open(metadata_file)

        # Load the metadata
        metadata = json.load(opened_metadata_file)       
        print("%28.28s: %s" % ("Metadata provided by the OneAgent: ", metadata))
        
        # Add to the existing service_prop
        service_props.update(metadata)

        # OR The direct way
        # service_props = json.load(open(fp.read()))
        
except:
    pass

print("%28.28s: %s" % ("Updated service_props", service_props))

Sample output:
Metadata file contents: /var/lib/dynatrace/oneagent/agent/config/dt_metadata_e617c525669e072eebe3d0f08212e8f2_1668006286.json Metadata provided by the One: {'dt.entity.process_group_instance': 'PROCESS_GROUP_INSTANCE-A98DCABD5C142B7D', 'dt.entity.host': 'HOST-8A0AB9A27B0DDECA', 'dt.entity.host_group': 'HOST_GROUP-107FF7F86F5BACD'} Updated service_props: {'service.name': 'FlaskApp', 'dt.entity.process_group_instance': 'PROCESS_GROUP_INSTANCE-A98DCABD5C142B7D', 'dt.entity.host': 'HOST-8A0AB9A27B0DDECA', 'dt.entity.host_group': 'HOST_GROUP-107FF7F86F5BACD'}