feat: install event-exporter

Log kubernetes events to loki so I can look them up even hours after
they happened (they vanish after an hour from etcd). Need this to debug
a weird issue that happens infrequently at nighttime.

kubernetes/main/apps/monitoring/event-exporter/app/helmrelease.yaml

@@ -0,0 +1,27 @@
+---
+# yaml-language-server: $schema=https://kubernetes-schemas.18b.haus/helm.toolkit.fluxcd.io/helmrelease_v2.json
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: event-exporter
+spec:
+  interval: 2h
+  chart:
+    spec:
+      chart: kubernetes-event-exporter
+      version: 3.3.2
+      sourceRef:
+        kind: HelmRepository
+        name: bitnami
+        namespace: flux-system
+  maxHistory: 2
+  install:
+    remediation:
+      retries: 3
+  upgrade:
+    cleanupOnFail: true
+    remediation:
+      retries: 3
+      strategy: uninstall
+  uninstall:
+    keepHistory: false

kubernetes/main/apps/monitoring/event-exporter/app/kustomization.yaml

@@ -0,0 +1,6 @@
+---
+# yaml-language-server: $schema=https://json.schemastore.org/kustomization
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ./helmrelease.yaml

kubernetes/main/apps/monitoring/event-exporter/ks.yaml

@@ -0,0 +1,21 @@
+---
+# yaml-language-server: $schema=https://kubernetes-schemas.18b.haus/kustomize.toolkit.fluxcd.io/kustomization_v1.json
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: &app event-exporter
+  namespace: flux-system
+spec:
+  targetNamespace: monitoring
+  commonMetadata:
+    labels:
+      app.kubernetes.io/name: *app
+  path: ./kubernetes/main/apps/monitoring/event-exporter/app
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: home-kubernetes
+  wait: false
+  interval: 2h
+  retryInterval: 1m
+  timeout: 5m

kubernetes/main/apps/monitoring/kustomization.yaml

@@ -6,6 +6,7 @@ resources:
   - ./namespace.yaml
   - ./alertmanager-telegram/ks.yaml
   - ./blackbox-exporter/ks.yaml
+  - ./event-exporter/ks.yaml
   - ./fritz-exporter/ks.yaml
   - ./gatus/ks.yaml
   - ./grafana/ks.yaml