Add Helm chart for Matrix Alertmanager receiver

tests/assert_chart.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+import sys
+from pathlib import Path
+
+import yaml
+
+chart_dir = Path(sys.argv[1])
+rendered_path = Path(sys.argv[2])
+chart = yaml.safe_load((chart_dir / "Chart.yaml").read_text())
+values = yaml.safe_load((chart_dir / "values.yaml").read_text())
+documents = [doc for doc in yaml.safe_load_all(rendered_path.read_text()) if doc]
+by_kind = {(doc["kind"], doc["metadata"]["name"]): doc for doc in documents}
+
+name = "matrix-alertmanager-receiver"
+deployment = by_kind[("Deployment", name)]
+service = by_kind[("Service", name)]
+service_monitor = by_kind[("ServiceMonitor", name)]
+config = by_kind[("ConfigMap", name)]["data"]["config.yaml"]
+container = deployment["spec"]["template"]["spec"]["containers"][0]
+service_port = service["spec"]["ports"][0]
+app_config = yaml.safe_load(config)
+
+assert container["image"] == f'{values["image"]["repository"]}:{chart["appVersion"]}'
+assert deployment["spec"]["replicas"] == 1
+assert deployment["spec"]["selector"]["matchLabels"] == service["spec"]["selector"]
+assert deployment["spec"]["selector"]["matchLabels"]["app.kubernetes.io/name"] == chart["name"]
+assert container["ports"][0]["containerPort"] == service_port["port"]
+assert service_port["targetPort"] == container["ports"][0]["name"]
+assert container["readinessProbe"]["httpGet"]["path"] == "/metrics"
+assert container["livenessProbe"]["httpGet"]["path"] == "/metrics"
+assert container["env"][0]["valueFrom"]["secretKeyRef"]["key"] == values["matrix"]["accessTokenSecret"]["key"]
+assert "access-token: ${MATRIX_ACCESS_TOKEN}" in config
+assert app_config["matrix"]["access-token"] == "${MATRIX_ACCESS_TOKEN}"
+assert service_monitor["spec"]["endpoints"][0]["port"] == service_port["name"]
+assert service_monitor["spec"]["endpoints"][0]["path"] == "/metrics"