Add Gatus.

kubernetes/apps/observability/gatus/app/externalsecret.yaml

@@ -0,0 +1,20 @@
+---
+# yaml-language-server: $schema=https://kubernetes-schemas.pages.dev/external-secrets.io/externalsecret_v1beta1.json
+apiVersion: external-secrets.io/v1beta1
+kind: ExternalSecret
+metadata:
+  name: gatus
+spec:
+  secretStoreRef:
+    kind: ClusterSecretStore
+    name: onepassword-connect
+  target:
+    name: gatus-secret
+    template:
+      engineVersion: v2
+      data:
+        CUSTOM_PUSHOVER_TOKEN: "{{ .gatus_token }}"
+        CUSTOM_PUSHOVER_USER_KEY: "{{ .userkey_jahanson }}"
+  dataFrom:
+    - extract:
+        key: pushover

kubernetes/apps/observability/gatus/app/helmrelease.yaml

@@ -0,0 +1,117 @@
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/bjw-s/helm-charts/main/charts/other/app-template/schemas/helmrelease-helm-v2beta2.schema.json
+apiVersion: helm.toolkit.fluxcd.io/v2beta2
+kind: HelmRelease
+metadata:
+  name: gatus
+spec:
+  interval: 30m
+  chart:
+    spec:
+      chart: app-template
+      version: 3.1.0
+      sourceRef:
+        kind: HelmRepository
+        name: bjw-s
+        namespace: flux-system
+  install:
+    remediation:
+      retries: 3
+  upgrade:
+    cleanupOnFail: true
+    remediation:
+      strategy: rollback
+      retries: 3
+  values:
+    controllers:
+      gatus:
+        annotations:
+          reloader.stakater.com/auto: "true"
+        containers:
+          app:
+            image:
+              repository: ghcr.io/twin/gatus
+              tag: v5.8.0@sha256:fecb4c38722df59f5e00ab4fcf2393d9b8dad9161db208d8d79386dc86da8a55
+            env:
+              TZ: America/Chicago
+              GATUS_CONFIG_PATH: /config
+              GATUS_DELAY_START_SECONDS: 5
+              CUSTOM_WEB_PORT: &port 80
+            envFrom:
+              - secretRef:
+                  name: gatus-secret
+            probes:
+              liveness: &probes
+                enabled: true
+                custom: true
+                spec:
+                  httpGet:
+                    path: /health
+                    port: *port
+                  initialDelaySeconds: 0
+                  periodSeconds: 10
+                  timeoutSeconds: 1
+                  failureThreshold: 3
+              readiness: *probes
+            securityContext:
+              allowPrivilegeEscalation: false
+              readOnlyRootFilesystem: true
+              capabilities: { drop: ["ALL"] }
+            resources:
+              requests:
+                cpu: 10m
+              limits:
+                memory: 256Mi
+        pod:
+          dnsConfig:
+            options:
+              - { name: ndots, value: "1" }
+          securityContext:
+            runAsUser: 568
+            runAsGroup: 568
+            runAsNonRoot: true
+            fsGroup: 568
+            fsGroupChangePolicy: OnRootMismatch
+    service:
+      app:
+        controller: gatus
+        ports:
+          http:
+            port: *port
+    serviceMonitor:
+      app:
+        serviceName: gatus
+        endpoints:
+          - port: http
+            scheme: http
+            path: /metrics
+            interval: 1m
+            scrapeTimeout: 10s
+    ingress:
+      app:
+        className: external
+        annotations:
+          external-dns.alpha.kubernetes.io/cloudflare-proxied: "true"
+          external-dns.alpha.kubernetes.io/target: external.hsn.dev
+        hosts:
+          - host: &host status.hsn.dev
+            paths:
+              - path: /
+                service:
+                  identifier: app
+                  port: http
+        tls:
+          - hosts: [*host]
+    serviceAccount:
+      create: true
+      name: gatus
+    persistence:
+      config:
+        type: emptyDir
+      config-file:
+        type: configMap
+        name: gatus-configmap
+        globalMounts:
+          - path: /config/config.yaml
+            subPath: config.yaml
+            readOnly: true

kubernetes/apps/observability/gatus/app/kustomization.yaml

@@ -0,0 +1,14 @@
+---
+# yaml-language-server: $schema=https://json.schemastore.org/kustomization
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ./externalsecret.yaml
+  - ./helmrelease.yaml
+  - ../../../../templates/postgres-database
+configMapGenerator:
+  - name: gatus-configmap
+    files:
+      - config.yaml=./resources/config.yml
+generatorOptions:
+  disableNameSuffixHash: true

kubernetes/apps/observability/gatus/app/pushsecret.yaml

@@ -0,0 +1,20 @@
+---
+# yaml-language-server: $schema=https://ks.hsn.dev/external-secrets.io/pushsecret_v1alpha1.json
+apiVersion: external-secrets.io/v1alpha1
+kind: PushSecret
+metadata:
+  name: thanos
+spec:
+  refreshInterval: 1h
+  secretStoreRefs:
+    - name: onepassword-connect
+      kind: ClusterSecretStore
+  selector:
+    secret:
+      name: gatus-pguser-gatus
+  data:
+    - match:
+        secretKey: uri
+        remoteRef:
+          remoteKey: gatus
+          property: DATABASE_URI

kubernetes/apps/observability/gatus/app/resources/config.yml

@@ -0,0 +1,47 @@
+---
+# Note: Gatus vars should be escaped with $${VAR_NAME} to avoid interpolation by Flux
+web:
+  port: $${CUSTOM_WEB_PORT}
+storage:
+  type: postgres
+  path: $${DATABASE_URI}
+  caching: true
+metrics: true
+debug: false
+ui:
+  title: Status | Gatus
+  header: Status
+alerting:
+  pushover:
+    application-token: $${CUSTOM_PUSHOVER_TOKEN}
+    user-key: $${CUSTOM_PUSHOVER_USER_KEY}
+    default-alert:
+      description: health-check failed
+      send-on-resolved: true
+      failure-threshold: 5
+      success-threshold: 2
+connectivity:
+  checker:
+    target: 1.1.1.1:53
+    interval: 1m
+endpoints:
+  - name: status
+    group: external
+    url: https://status.hsn.dev
+    interval: 1m
+    client:
+      dns-resolver: tcp://1.1.1.1:53
+    conditions:
+      - "[STATUS] == 200"
+    alerts:
+      - type: pushover
+  - name: flux-webhook
+    group: external
+    url: https://flux-webhook.hsn.dev
+    interval: 1m
+    client:
+      dns-resolver: tcp://1.1.1.1:53
+    conditions:
+      - "[STATUS] == 404"
+    alerts:
+      - type: pushover

kubernetes/apps/observability/gatus/ks.yaml

@@ -0,0 +1,29 @@
+---
+# yaml-language-server: $schema=https://kubernetes-schemas.pages.dev/kustomize.toolkit.fluxcd.io/kustomization_v1.json
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: &app gatus
+  namespace: flux-system
+spec:
+  targetNamespace: observability
+  commonMetadata:
+    labels:
+      app.kubernetes.io/name: *app
+  dependsOn:
+    - name: crunchy-postgres-operator
+    - name: external-secrets-stores
+  path: ./kubernetes/apps/observability/gatus/app
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: home-kubernetes
+  wait: false
+  interval: 30m
+  retryInterval: 1m
+  timeout: 5m
+  postBuild:
+    substitute:
+      APP: *app
+      DB_NAME: gatus
+      DB_USER: gatus

kubernetes/apps/observability/kustomization.yaml

@@ -7,7 +7,7 @@ resources:
   - ./namespace.yaml
   # Flux-Kustomizations
   - ./alertmanager-silencer/ks.yaml
-  # - ./gatus/ks.yaml
+  - ./gatus/ks.yaml
   - ./grafana/ks.yaml
   - ./kube-prometheus-stack/ks.yaml
   - ./loki/ks.yaml