Jaeger

TABLE OF CONTENTS

The Instana Host Agent is capable of ingesting Jaeger tracing data.

Setup

  1. Install an Instana host agent on the same host as the processes emitting Jaeger traces.
  2. Set the JAEGER_ENDPOINT environment variable to http://localhost:42699/com.instana.plugin.jaeger.trace, assuming that the Jaeger-traced process can connect to the host agent on that IP address and port; this is not a given in some containerized environments, in which case the network setup and the value of the JAEGER_ENDPOINT environment variable must be adjusted accordingly.

Known Limitations

  • The tracing data collected from Jaeger will not be correlated with the tracing data collected via AutoTrace, resulting in separate traces even if the systems traced by Jaeger and Instana AutoTrace, respectively, where directly interacting with one another.
  • Since the Jaeger tracing data do not convey a notion of which process is sending them to the host agent, Instana will correlate those traces to the host underpinning the host agent. This prevents the association with the process, and therefore also container and platform hierarchy (e.g., Kubernetes pod, namespace and cluster).
  • Jaeger has no notion of end-user monitoring (although this may eventually change with the adoption of W3C TraceContext); as such, beacons collected with Instana Website Monitoring will not be correlated with backend traces collected from Jaeger.
  • The host agent supports the collection of Jaeger traces only over HTTP. UDP, which is the protocol used if you configure the JAEGER_AGENT_HOST and JAEGER_AGENT_PORT environment variables, is not supported.