├── README.md
└── base
    ├── kustomization.yaml
    └── my-app.yaml


/README.md:
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  1 | # Hands-On
  2 | 
  3 | ### 1. Install Kustomize
  4 | 
  5 | ```
  6 | brew install kustomize
  7 | kustomize version
  8 | ```
  9 | 
 10 | ### 2. Fork The Example Repo
 11 | 
 12 | * Open https://github.com/gitops-workshop/my-app-deployment
 13 | * Click “Fork”. 
 14 | 
 15 | ### 3. Clone Your Fork
 16 | 
 17 | In your terminal:
 18 | 
 19 | ```bash
 20 | export username=... ;# your Github username in lowercase
 21 | git clone git@github.com:${username}/my-app-deployment.git
 22 | cd my-app-deployment
 23 | ```
 24 | 
 25 | ### 4. Build The Base
 26 | 
 27 | ```
 28 | kustomize build base
 29 | ```
 30 | 
 31 | Note: The above URL should start with "git@" and you'll need to enter your username.
 32 | 
 33 | ### 5. Create An Overlay
 34 | 
 35 | ```bash
 36 | mkdir -p overlays/dev
 37 | ```
 38 | 
 39 | ```bash
 40 | cat > overlays/dev/kustomization.yaml <<EOL
 41 | apiVersion: kustomize.config.k8s.io/v1beta1
 42 | kind: Kustomization
 43 | resources:
 44 |   - ../../base
 45 | EOL
 46 | ```
 47 | 
 48 | ```bash
 49 | kustomize build overlays/dev
 50 | git add . && git commit -am "add dev overlay"
 51 | git push
 52 | ```
 53 | 
 54 | ### 6. Change The Name Prefix
 55 | 
 56 | ```
 57 | cd overlays/dev
 58 | kustomize edit set nameprefix ${username}-
 59 | git diff
 60 | kustomize build
 61 | git commit -am "set name prefix"
 62 | git push
 63 | ```
 64 | 
 65 | ### 7. Open Argo CD And Create Your App
 66 | 
 67 | * Open https://argo-cd-kubecon.apps.argoproj.io/
 68 | * Click "Login Via Github"
 69 | * Click "New application"
 70 | 
 71 | | Field | Value |
 72 | |-------|-------|
 73 | | Application name: | `${username}` |
 74 | | Project: | `default` |
 75 | | Sync policy: | `Manual` |
 76 | | Repository: | `https://github.com/${username}/my-app-deployment` |
 77 | | Revision: | `HEAD` |
 78 | | Path: | `overlays/dev` |
 79 | | Cluster: | `https://kubernetes.default.svc` |
 80 | | Namespace: | `default` |
 81 |   
 82 | ### 8. Sync Your App
 83 | 
 84 | * Click "Sync".
 85 | * Click "Synchronize" in the Sliding panel.
 86 | 
 87 | ### 9. Upgrade Your App
 88 | 
 89 | ```
 90 | kustomize edit set image gitopsworkshop/my-app:v2
 91 | git diff
 92 | kustomize build
 93 | ```
 94 | 
 95 | ```
 96 | git commit -am "upgrade to version 2"
 97 | git push
 98 | ```
 99 | 
100 | * Detect git changes: "Refresh"
101 | * Preview Differences: "App Diff"
102 | * Deploy New Version: "Sync"
103 | 
104 | ### 10. Troubleshoot Degraded App
105 | 
106 | 1. Open app
107 | 2. Find the red heart
108 | 3. Clik on the resource and check each tab
109 | 
110 | ### 11. Emergency Rollback
111 | 
112 | * Click "History And Rollback"
113 | * Click "..." button in the last row
114 | * Click "Rollback"
115 | * Click "Ok" in the modal panel
116 | 
117 | ### 12. GitOps Rollback
118 | 
119 | ```
120 | git revert $(git rev-parse HEAD)
121 | git push
122 | ```
123 | 


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/base/kustomization.yaml:
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1 | resources:
2 |   - my-app.yaml


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/base/my-app.yaml:
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 1 | apiVersion: v1
 2 | kind: Pod
 3 | metadata:
 4 |   name: my-app
 5 | spec:
 6 |   containers:
 7 |     - name: main
 8 |       image: gitopsworkshop/my-app:v1
 9 |       imagePullPolicy: IfNotPresent
10 | 


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