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ziswb · Apr 15, 2024 · 3cbf54b · 3cbf54b
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diff --git a/README.md b/README.md
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+# GitOps Examples
+
+This repository contains examples on GitOps with [ArgoCD](https://argo-cd.readthedocs.io)
+to try out and build upon.
+
+It explores the following concepts:
+
+- basic ArgoCD `Applications`, using the manifests in [`first-gitops-app/`](./first-gitops-app)
+- a simple _App-of-Apps_ `Application`, using [`parent-app.yaml`](./parent-app.yaml) and the children `Applications` in [`apps/`](./apps)
+- an example `ApplicationSet`, using [`monitoring-appset.yaml`](./monitoring-appset.yaml) and the directories under [`monitoring-appset/`](./monitoring-appset/)
+
+For `parent-app.yaml` and `monitoring-appset.yaml`, only boilerplate YAML is defined - all information regarding the actual ArgoCD environment, repositories, etc. need to be entered.
diff --git a/apps/.gitkeep b/apps/.gitkeep
diff --git a/first-gitops-app/configmap.yaml b/first-gitops-app/configmap.yaml
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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: nginx-configmap
+data:
+  index.html: |
+    <!DOCTYPE html>
+    <html>
+      <head>
+        <title>Welcome to NGINX!</title>
+        <style>
+          body {
+            width: 35em;
+            margin: 0 auto;
+            font-family: Tahoma, Verdana, Arial, sans-serif;
+          }
+        </style>
+      </head>
+      <body>
+        <h1>Welcome to Our First Example!</h1>
+        <p>This webserver has been deployed by ArgoCD, isn&apos;t that neat?</p>
+      </body>
+    </html>
diff --git a/first-gitops-app/deployment.yaml b/first-gitops-app/deployment.yaml
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+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:stable
+          ports:
+            - containerPort: 80
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 15
+            periodSeconds: 10
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          volumeMounts:
+            - name: nginx-config
+              mountPath: /usr/share/nginx/html
+      volumes:
+        - name: nginx-config
+          configMap:
+            name: nginx-configmap
diff --git a/first-gitops-app/ingress.yaml b/first-gitops-app/ingress.yaml
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+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: nginx
+spec:
+  rules:
+    - host: <valid-domain-here>
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: nginx
+                port:
+                  number: 80
diff --git a/first-gitops-app/service.yaml b/first-gitops-app/service.yaml
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+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+spec:
+  selector:
+    app: nginx
+  ports:
+    - protocol: TCP
+      port: 80
+      targetPort: 80
+  type: ClusterIP
diff --git a/monitoring-appset.yaml b/monitoring-appset.yaml
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+---
+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: monitoring-appset
+  namespace: argocd
+spec:
+  generators:
+    - matrix:
+        generators:
+          - list:
+              elements:
+                - team: team-green
+                  namespace: team-green-mon
+                - team: team-blue
+                  namespace: blue-monitoring
+          - git:
+              directories:
+                - path: monitoring-appset/*
+              repoURL: https://github.com/mocdaniel/gitops-examples
+              revision: HEAD
+  goTemplate: true
+  template:
+    metadata:
+      name: "{{ .team }}-{{ .path.basename }}"
+    spec:
+      project: team-monitoring
+      source:
+        repoURL: https://github.com/mocdaniel/gitops-examples
+        targetRevision: HEAD
+        path: "{{ .path.path }}"
+        helm:
+          valueFiles:
+            - values.yaml
+      destination:
+        server: https://kubernetes.default.svc
+        namespace: "{{ .namespace }}" # this is dangerous!
+      syncPolicy:
+        syncOptions:
+          - CreateNamespace=true
diff --git a/monitoring-appset/alertmanager/Chart.yaml b/monitoring-appset/alertmanager/Chart.yaml
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+---
+apiVersion: v2
+name: mon-alertmanager
+version: 1.0.0
+dependencies:
+  - name: alertmanager
+    version: 1.10.0
+    repository: https://prometheus-community.github.io/helm-charts
diff --git a/monitoring-appset/alertmanager/values.yaml b/monitoring-appset/alertmanager/values.yaml
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+---
+alertmanager:
+  persistence:
+    enabled: false
diff --git a/monitoring-appset/prometheus/Chart.yaml b/monitoring-appset/prometheus/Chart.yaml
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+---
+apiVersion: v2
+name: mon-prometheus
+version: 1.0.0
+dependencies:
+  - name: prometheus
+    version: 25.19.1
+    repository: https://prometheus-community.github.io/helm-charts
diff --git a/monitoring-appset/prometheus/values.yaml b/monitoring-appset/prometheus/values.yaml
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+---
+prometheus:
+  alertmanager:
+    enabled: false
+  kube-state-metrics:
+    enabled: false
+  prometheus-node-exporter:
+    enabled: false
+  prometheus-pushgateway:
+    enabled: false
+  server:
+    persistentVolume:
+      enabled: false
diff --git a/parent-app.yaml b/parent-app.yaml
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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: parent-app
+  namespace: argocd
+spec:
+  destination:
+    namespace:
+    in-cluster:
+  project:
+  source:
+    repoURL:
+    targetRevision: HEAD
+    path: apps
+  syncPolicy:
+    automated: {}