hack/observability: add metrics-server chart

Signed-off-by: Stefan Büringer [email protected]

Author: sbueringer

Tiltfile

@@ -454,6 +454,10 @@ def deploy_observability():
         k8s_yaml(read_file("./.tiltbuild/yaml/parca.observability.yaml"), allow_duplicates = True)
         k8s_resource(workload = "parca", new_name = "parca", port_forwards = "7070", extra_pod_selectors = [{"app": "parca"}], labels = ["observability"], objects = ["parca:serviceaccount"])
 
+    if "metrics-server" in settings.get("deploy_observability", []):
+        k8s_yaml(read_file("./.tiltbuild/yaml/metrics-server.observability.yaml"), allow_duplicates = True)
+        k8s_resource(workload = "metrics-server", new_name = "metrics-server", extra_pod_selectors = [{"app": "metrics-server"}], labels = ["observability"], objects = ["metrics-server:serviceaccount"])
+
     if "visualizer" in settings.get("deploy_observability", []):
         k8s_yaml(read_file("./.tiltbuild/yaml/visualizer.observability.yaml"), allow_duplicates = True)
         k8s_resource(

docs/book/src/developer/tilt.md

@@ -203,6 +203,7 @@ Supported values are:
   * `grafana`*: To create dashboards and query `loki`, `prometheus` and `tempo`.
   * `kube-state-metrics`: For exposing metrics for Kubernetes and CAPI resources to `prometheus`.
   * `loki`: To receive and store logs.
+  * `metrics-server`: To enable `kubectl top node/pod`.
   * `prometheus`*: For collecting metrics from Kubernetes.
   * `promtail`: For providing pod logs to `loki`.
   * `parca`*: For visualizing profiling data.

hack/observability/metrics-server/kustomization.yaml

@@ -0,0 +1,16 @@
+resources:
+- ../namespace.yaml
+
+helmCharts:
+- name: metrics-server
+  repo: https://kubernetes-sigs.github.io/metrics-server/
+  releaseName: metrics-server
+  namespace: observability
+  valuesFile: values.yaml
+  version: 3.10.0
+
+helmGlobals:
+  # Store chart in ".charts" folder instead of "charts".
+  # Otherwise "go mod tidy" picks up dependencies of go files contained in the Helm Chart.
+  # "go mod tidy" ignores folders that begin with ".": https://pkg.go.dev/cmd/go#hdr-Package_lists_and_patterns.
+  chartHome: .charts

hack/observability/metrics-server/values.yaml

@@ -0,0 +1,3 @@
+# Use insecure-tls so we can scrape kind Nodes.
+args:
+- --kubelet-insecure-tls