You can leverage Custom Resources to configure the OpenTelemetry auto-instrumentation library and add annotations to your workloads to easily collect logs.
1) CRD installation
You can create one by searching for Infrastructure - Custom Resources - 'instrumentations'.
You can create it by clicking the Create button, selecting the namespace where you want to collect logs, and modifying the form below.
The above CRD is applied on a namespace basis, and automatic container logs can be collected for other languages in the same namespace.
apiVersion: opentelemetry.io/v1alpha1
kind: Instrumentation
metadata:
name: {Instrumentation name}
spec:
exporter:
endpoint: {log-agent Service address}:4318
java:
image: ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-java:2.0.0
env:
- name: OTEL_LOGS_EXPORTER
value: otlp
- name: OTEL_METRICS_EXPORTER
value: none
- name: OTEL_TRACES_EXPORTER
value: none
# Used when you want to collect all Java applications for which the anotation value of the namespace is 'true'..
- name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
value: {log-agent Service address}:4318/v1/logs
log-agent Service address : Infrastructure - Cluster - Add-ons - Click 'log-agent' and check the service name.
( http port = 4318 , grpc port = 4317)
By adding an environment variable for each individual application rather than all applications in the namespace through CRD, you can only collect logs for a specific application.
2) Add annotations to the individual applications you want to collect
Add annotations to the workloads in the namespace for which you want to collect logs.
Application - Service Map - Service Map to collect logs - Workload - Select the application to collect logs - Click the "Settings" button.
Change the Yaml view and add the following annotations to the template - metadata - annotations section.
