I have a requirement to pass cluster, namespace and pod name to AppDynamics agent from my container deployed in Kubernetes cluster.
I tried something as below, but that does not work.
containers: - env: - name: JAVA_OPTS value: -Dappdynamics.agent.nodeName=$HOST-$spec.nodeName-spec.PodName and
- name: appdynamics.agent.nodeName value= $HOST-$spec.nodeName-spec.PodName Could anyone please help me here how to collect the detail and pass to AppD. Thanks in advance.
You can get POD_NAME and POD_NAMESPACE passing them as environment variables via fieldRef.
apiVersion: v1 kind: Pod metadata: name: test-env spec: containers: - name: test-container image: my-test-image:latest env: - name: MY_NODE_NAME valueFrom: fieldRef: fieldPath: spec.nodeName - name: MY_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: MY_POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: MY_POD_IP valueFrom: fieldRef: fieldPath: status.podIP - name: MY_POD_SERVICE_ACCOUNT valueFrom: fieldRef: fieldPath: spec.serviceAccountName - name: REFERENCE_EXAMPLE value: "/$(MY_NODE_NAME)/$(MY_POD_NAMESPACE)/$(MY_POD_NAME)/data.log" restartPolicy: Never EDIT: Added example env REFERENCE_EXAMPLE to show how to reference variables. Thanks to this answer for pointing out the $() interpolation.
You can reference supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP as mentioned in the documentation here.
However, CLUSTERNAME is not a standard property available. According to this PR #22043, the CLUSTERNAME should be injected to the .metadata field if using GCE.
Otherwise, you'll have to specific the CLUSTERNAME manually in the .metadata field and then use fieldRef to inject it as an environment variable.
field label not supported: status.restartPolicy.
env should be - name: MY_NODE_NAME valueFrom: fieldRef: fieldPath: spec.nodeName and the second would be -name: JAVA_OPTS value: -Xmx512m -Xms256m -Dappdynamics.agent.nodeName=$(MY_NODE_NAME)Below format helped me, suggested by ewok2030 and Praveen. Only one thing to make sure that the variable should be declared before they are used as JAVA_OPTS.
containers:
- env: - name: APPD_NODE_NAME valueFrom: fieldRef: fieldPath: spec.nodeName - name: APPD_POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: APP_POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: JAVA_OPTS value: -Xmx712m -Xms556m -Dpdp.logging.level=WARN -Dappdynamics.agent.nodeName=$(APPD_NODE_NAME)-$(APPD_POD_NAMESPACE)-$(APP_POD_NAME)