some unfinished and untested work over helm mirror

config/helm/scraper/test/examples/upgrade/Makefile

@@ -0,0 +1,17 @@
+default: test
+
+include ../../../helpers/examples.mk
+
+CHART := apm-server
+RELEASE := helm-apm-server-upgrade
+# K8S 1.22 doesn't support anymore rbac.authorization.k8s.io/v1beta1 used in 7.9.0
+FROM := 7.10.0
+
+install:
+	../../../helpers/upgrade.sh --chart $(CHART) --release $(RELEASE) --from $(FROM)
+	kubectl rollout status deployment $(RELEASE)-apm-server
+
+test: install goss
+
+purge:
+	helm del $(RELEASE)

config/helm/scraper/test/examples/upgrade/README.md

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+# Upgrade
+
+This example will deploy APM Server chart using an old chart version,
+then upgrade it.
+
+
+## Usage
+
+* Add the Elastic Helm charts repo: `helm repo add elastic https://helm.elastic.co`
+
+* Deploy [Elasticsearch Helm chart][]: `helm install elasticsearch elastic/elasticsearch`
+
+* Deploy and upgrade APM Server chart with the default values: `make install`
+
+
+## Testing
+
+You can also run [goss integration tests][] using `make test`.
+
+
+[goss integration tests]: https://github.com/elastic/helm-charts/tree/main/apm-server/examples/upgrade/test/goss.yaml

config/helm/scraper/test/examples/upgrade/test/goss.yaml

@@ -0,0 +1,6 @@
+http:
+  http://localhost:8200?pretty:
+    status: 200
+    timeout: 2000
+    body:
+      - "8.5.1"

config/helm/scraper/test/examples/upgrade/values.yaml

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+---
+apmConfig:
+  apm-server.yml: |
+    apm-server:
+      host: "0.0.0.0:8200"
+
+    queue: {}
+    output.file:
+      enabled: false
+
+    output.elasticsearch:
+      hosts: ["http://upgrade-master:9200"]
+      username: "${ELASTICSEARCH_USERNAME}"
+      password: "${ELASTICSEARCH_PASSWORD}"
+
+extraEnvs:
+  - name: "ELASTICSEARCH_USERNAME"
+    valueFrom:
+      secretKeyRef:
+        name: upgrade-master-credentials
+        key: username
+  - name: "ELASTICSEARCH_PASSWORD"
+    valueFrom:
+      secretKeyRef:
+        name: upgrade-master-credentials
+        key: password