kamu-api-server: OpenTelemetry endpoint configuration (#57)

* Add HOST_IP  environment variable for Kamu API server
* Implement OpenTelemetry endpoint configuration for Kamu API server
* Add default value for OpenTelemetry url

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Co-authored-by: Kristina Bugaienko <kr.bugaienko@gmail.com>

charts/kamu-api-server/Chart.yaml

@@ -3,7 +3,7 @@ name: kamu-api-server
 description: API server component of the Kamu Compute Node
 type: application
 version: 0.37.1
-appVersion: "0.37.1"
+appVersion: "0.37.2"
 home: https://kamu.dev
 icon: https://www.kamu.dev/images/kamu_logo_icon_bg_square.png
 sources:

charts/kamu-api-server/templates/deployment.yaml

@@ -97,6 +97,14 @@ spec:
               value: "1"
             - name: RUST_LOG
               value: {{ .Values.app.logLevel | quote }}
+            - name: HOST_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.hostIP
+            {{- if .Values.opentelemetry.enabled }}
+            - name: KAMU_OTEL_OTLP_ENDPOINT
+              value: {{ .Values.opentelemetry.url }}
+            {{- end }}
             {{- if .Values.app.awsCredentials.enabled }}
             {{- $secretName := include "kamu-api-server.awsCredentialsSecretName" . }}
             - name: AWS_ENDPOINT

charts/kamu-api-server/values.yaml

@@ -64,6 +64,10 @@ serviceAccount:
   # If not set and create is true, a name is generated using the fullname template
   name: ""
 
+opentelemetry:
+  enabled: false
+  url: "http://$(HOST_IP):4317"
+
 extraEnv: []
 extraEnvFrom: []