f3s/monitoring: disable grafana, loki, tempo; reduce alloy to no-op

Grafana's SQLite-on-NFS persistence is unreliable across restarts (the
new pod can't reacquire a clean exclusive lock after any NFS bounce),
and with Loki + Tempo also gone there's nothing left for it to
visualize. Keeping Prometheus alone for metrics + alerting.

Changes:
- prometheus.yaml: add grafana.enabled=false in the kube-prometheus-stack
  values so the subchart no longer renders the grafana deployment/pvc.
- loki.yaml, tempo.yaml, grafana-ingress.yaml: renamed to .disabled
  (same pattern as commit 03a18c6) so 'kubectl apply -f argocd-apps/'
  stops re-creating them; the cluster Applications were also deleted,
  which cascade-removes the helm resources via the resources-finalizer.
- alloy.yaml: drop the loki.write and otelcol.* blocks (no destinations
  to ship to). DaemonSet stays deployed with a minimal 'logging' block
  so the chart can be re-enabled by restoring the blocks here.

Prometheus TSDB was also wiped (corrupted zero-byte WAL segments from
the same NFS blip that took grafana down) — done separately, not part
of this commit.

1 files changed, 0 insertions, 86 deletions

diff --git a/f3s/argocd-apps/monitoring/loki.yaml b/f3s/argocd-apps/monitoring/loki.yaml
deleted file mode 100644
index c7985c2..0000000
--- a/f3s/argocd-apps/monitoring/loki.yaml
+++ /dev/null
@@ -1,86 +0,0 @@
-apiVersion: argoproj.io/v1alpha1
-kind: Application
-metadata:
-  name: loki
-  namespace: cicd
-  finalizers:
-    - resources-finalizer.argocd.argoproj.io
-spec:
-  project: default
-  source:
-    repoURL: https://grafana.github.io/helm-charts
-    chart: loki
-    targetRevision: 6.6.3
-    helm:
-      releaseName: loki
-      valuesObject:
-        deploymentMode: SingleBinary
-
-        loki:
-          auth_enabled: false
-          commonConfig:
-            replication_factor: 1
-          storage:
-            type: filesystem
-          schemaConfig:
-            configs:
-              - from: "2024-01-01"
-                store: tsdb
-                object_store: filesystem
-                schema: v13
-                index:
-                  prefix: index_
-                  period: 24h
-
-        singleBinary:
-          replicas: 1
-          extraVolumes:
-            - name: loki-data
-              persistentVolumeClaim:
-                claimName: loki-data-pvc
-          extraVolumeMounts:
-            - name: loki-data
-              mountPath: /var/loki
-          persistence:
-            enabled: false
-
-        read:
-          replicas: 0
-
-        write:
-          replicas: 0
-
-        backend:
-          replicas: 0
-
-        gateway:
-          enabled: false
-
-        chunksCache:
-          enabled: false
-
-        resultsCache:
-          enabled: false
-
-        lokiCanary:
-          enabled: false
-
-        test:
-          enabled: false
-
-  destination:
-    server: https://kubernetes.default.svc
-    namespace: monitoring
-
-  syncPolicy:
-    automated:
-      prune: true
-      selfHeal: true
-    syncOptions:
-      - CreateNamespace=false
-    retry:
-      limit: 3
-      backoff:
-        duration: 5s
-        factor: 2
-        maxDuration: 1m