original

LICENSE

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+MIT License
+
+Copyright (c) 2023 Sam
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Overview
+In this demo we will learn the basics of ArgoCD
+
+## Install the School App
+```bash
+# Setup MongoDB DB in K8s
+kubectl create ns schoolapp
+helm repo add bitnami https://charts.bitnami.com/bitnami
+helm install schoolapp-mongodb --namespace schoolapp \
+ --set auth.enabled=true \
+ --set auth.rootUser=schoolapp \
+ --set auth.rootPassword=mongoRootPass \
+  bitnami/mongodb
+
+# Add project repo to helm
+helm repo add schoolapp https://gitlab.com/api/v4/projects/34240616/packages/helm/stable
+
+# Install the Frontend
+helm install frontend -n schoolapp schoolapp/schoolapp-frontend
+# Install the API
+helm install api -n schoolapp schoolapp/schoolapp-api
+# Port forward the frontend
+kubectl -n schoolapp port-forward service/frontend 8001:8080
+# Port forward the api
+kubectl -n schoolapp port-forward service/api 5000:5000
+```
+
+## Test the School App
+
+From a browser, go to http://127.0.0.1:8001
+
+## ArgoCD Setup
+
+Now let's get ArgoCD ready for our school app.
+
+## Install ArgoCD
+
+### Install the ArgoCD Server
+
+```bash
+kubectl create namespace argocd
+kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
+```
+
+Wait until all the pods are running
+
+```bash
+watch kubectl get po
+```
+
+## Access ArgoCD
+
+### Expose the ArgoCD API Server
+
+```bash
+kubectl port-forward svc/argocd-server -n argocd 8002:443
+```
+
+### Get the admin password
+
+```bash
+kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d; echo
+```
+
+For this demo, I won't change the password, but you should go ahead and change the password and remove the K8s secret.
+
+### Login using the UI
+
+You can log in to the UI by opening a browser window and going to https://127.0.0.1:8002
+
+```bash
+username: admin
+password: <THE_PASSWORD_YOU_GOT_ABOVE>
+```
+
+## School App Example with ArgoCD and Hardcoded Secrets
+
+Now let's see how to use a GitOps approach with ArgoCD to run our school app.
+
+## Delete the Current School App
+
+```bash
+kubectl delete ns schoolapp
+```
+
+## Create the School App Application in ArgoCD
+
+```bash
+kubectl apply -f argocdSchoolApp.yaml
+```
+
+## Test the School App with ArgoCD
+
+```bash
+# Port forward the frontend
+kubectl port-forward service/frontend 8001:8080 -n schoolapp
+# Port forward the api
+kubectl port-forward service/api 5000:5000 -n schoolapp
+```
+
+Try creating and deleting a course and check the logs of the api pod.
+
+```bash
+kubectl logs -n schoolapp -f $(kubectl get pods --template '{{range .items}}{{.metadata.name}}{{end}}' --selector=app=api) -c api
+```
+
+## Making a Change in Git
+
+Now let's see how Argo CD can detect drift between the live state and the target state. Let's make a simple change in our Git repo for the called schoolapp-subchart/values.yaml. Change the mongodb.auth.enabled value from true to false.
+
+```yaml
+mongodb:
+  auth:
+    enabled: false
+    rootUser: 'schoolapp'
+    rootPassword: 'mongoRootPass'
+```
+Then commit and push your changes.

argocdSchoolApp.yaml

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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: schoolapp
+  namespace: argocd
+spec:
+  destination:
+    namespace: schoolapp
+    server: 'https://kubernetes.default.svc'
+  source:
+    path: schoolapp-subchart
+    repoURL: 'https://github.com/samgabrail/env0-argocd.git'
+    targetRevision: HEAD
+  project: default
+  syncPolicy:
+    syncOptions:
+      - CreateNamespace=true

schoolapp-subchart/Chart.lock

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+dependencies:
+- name: schoolapp-frontend
+  repository: https://gitlab.com/api/v4/projects/34240616/packages/helm/stable
+  version: 0.5.8
+- name: schoolapp-api
+  repository: https://gitlab.com/api/v4/projects/34240616/packages/helm/stable
+  version: 0.5.8
+- name: mongodb
+  repository: https://charts.bitnami.com/bitnami
+  version: 11.1.1
+digest: sha256:011d9f270e259d2fa11a8fe98444957281741c23b95c12f11c292c030539e7f3
+generated: "2022-05-10T20:08:39.4974464Z"

schoolapp-subchart/Chart.yaml

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+---
+apiVersion: v2
+name: schoolapp-subchart
+type: application
+version: 1.0.0
+appVersion: "1.0.0"
+dependencies:
+- name: schoolapp-frontend
+  version: 0.5.8
+  repository: https://gitlab.com/api/v4/projects/34240616/packages/helm/stable
+- name: schoolapp-api
+  version: 0.5.8
+  repository: https://gitlab.com/api/v4/projects/34240616/packages/helm/stable
+- name: mongodb
+  version: 11.1.1
+  repository: https://charts.bitnami.com/bitnami

schoolapp-subchart/values.yaml

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+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+mongodb:
+  auth:
+    enabled: true
+    rootUser: 'schoolapp'
+    rootPassword: 'mongoRootPass'
+
+schoolapp-api:
+  vault:
+    status: 'disabled'
+    kind: 'disabled'