Enable tracing with Jaeger on Sentinel by installing the opennms-core-tracing-jaeger feature.

Configurations has to be made in the etc directory relative to the Sentinel home directory. Depending on your operating system the home directory is in /usr/share/sentinel for Debian/Ubuntu or /opt/sentinel for CentOS/RHEL.
Create a file to load the tracing feature on startup
sudo vi etc/featuresBoot.d/jaeger.boot
Add the Jaeger feature and save the file
opennms-core-tracing-jaeger
Uninstalling the opennms-core-tracing-jaeger feature at runtime is not yet supported. To disable tracing with Jaeger, remove the reference from the features boot file and restart Sentinel.
Create a configuration file for tracing settings
sudo vi etc/custom.system.properties
Add configuration properties for tracing with Jaeger
JAEGER_AGENT_HOST=my-jaeger-host(1)
1 Replace the my-jaeger-host with your Jaeger instance where you collect the tracing information
Available configuration options are listed in the Jaeger Core Readme.
The Jaeger service name is the Instance-ID from Sentinel.
Restart Sentinel to apply the changes
sudo systemctl restart sentinel