observability: add k8s API/kubelet tracing, Alloy, Mimir and Loki

Wire kube-apiserver and kubelet tracing to a Jaeger collector on
docker-29, deploy Grafana Alloy in-cluster to ship logs/metrics, and
stand up Mimir + Loki on docker-30 as their backing stores.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

kubernetes-kvm-terraform/files/manifests/kube-apiserver.yaml

@@ -44,6 +44,7 @@ spec:
     - --service-cluster-ip-range=10.96.0.0/12
     - --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
     - --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
+    - --tracing-config-file=/etc/kubernetes/tracing-config.yaml
     image: registry.k8s.io/kube-apiserver:v1.32.11
     imagePullPolicy: IfNotPresent
     livenessProbe:

kubernetes-kvm-terraform/files/tracing-config.yaml

@@ -0,0 +1,4 @@
+apiVersion: apiserver.config.k8s.io/v1beta1
+kind: TracingConfiguration
+endpoint: 192.168.0.29:4317
+samplingRatePerMillion: 1000000