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devcontainer/VARIABLES.md
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Chris Farhood f79be89e4e docs: Add comprehensive deployment and variables reference 
Add detailed documentation to enable autonomous deployment by other AI agents.

New files:
- DEPLOYMENT.md: Complete step-by-step deployment guide
  - Prerequisites checklist
  - Required vs optional variables clearly marked
  - All configuration variables documented with examples
  - Troubleshooting section
  - Quick deploy example with all values
  - Configuration summary table

- VARIABLES.md: Complete variables reference
  - All variables listed with file, line, type, description
  - Required variables clearly marked
  - Optional variables with defaults
  - Variables grouped by use case
  - Quick copy templates
  - Environment variables reference

Updated README.md:
- Add links to new documentation files
- Clear pointer to DEPLOYMENT.md for deployment

These docs enable another Claude Code instance to:
1. Identify all required configuration variables
2. Know where to find/set each variable
3. Understand what values are valid
4. Deploy successfully without human intervention

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
2026-02-15 08:36:45 -05:00

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Configuration Variables Reference

Quick reference for all configurable variables in this project.

Required Variables

These MUST be configured before deployment:

Storage Class Name

  • Variable: storageClassName
  • File: k8s/statefulset.yaml
  • Line: ~117
  • Type: String
  • Description: ReadWriteMany storage class available in your cluster
  • Example: ceph-filesystem, nfs-client, efs-sc
  • How to find: kubectl get storageclass

GitHub Repository URL

  • Variable: github-repo
  • File: k8s/configmap.yaml
  • Line: ~9
  • Type: String (URL)
  • Description: Repository to clone on container startup
  • Format: https://github.com/username/repository
  • Example: https://github.com/cpfarhood/my-project

Gateway Name

  • Variable: parentRefs[0].name
  • File: k8s/httproute.yaml
  • Line: ~8
  • Type: String
  • Description: Name of your Gateway resource
  • How to find: kubectl get gateway -A

Gateway Namespace

  • Variable: parentRefs[0].namespace
  • File: k8s/httproute.yaml
  • Line: ~9
  • Type: String
  • Description: Namespace where Gateway is deployed
  • How to find: kubectl get gateway -A

Domain Hostname

  • Variable: hostnames[0]
  • File: k8s/httproute.yaml
  • Line: ~11
  • Type: String (FQDN)
  • Description: Domain name for accessing the container
  • Example: devcontainer.example.com

Optional Variables

GitHub Token

  • Variable: github-token
  • File: Sealed Secret
  • Type: String (GitHub PAT)
  • Description: Personal Access Token for private repos
  • Required: Only for private repositories
  • Format: ghp_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  • Scopes: repo

VNC Password

  • Variable: vnc-password
  • File: Sealed Secret
  • Type: String
  • Description: Password for VNC web interface
  • Required: Recommended for security
  • Format: Any string (12+ characters recommended)

Namespace

  • Variable: namespace
  • File: k8s/kustomization.yaml
  • Line: ~5
  • Type: String
  • Description: Kubernetes namespace for deployment
  • Default: default

Container Image

  • Variable: image
  • File: k8s/statefulset.yaml
  • Line: ~32
  • Type: String (image reference)
  • Description: Docker image to deploy
  • Default: ghcr.io/cpfarhood/devcontainer:latest
  • Format: registry/repository:tag

Memory Request

  • Variable: resources.requests.memory
  • File: k8s/statefulset.yaml
  • Line: ~99
  • Type: String (quantity)
  • Description: Minimum memory to reserve
  • Default: 2Gi
  • Format: <number>Gi or <number>Mi

Memory Limit

  • Variable: resources.limits.memory
  • File: k8s/statefulset.yaml
  • Line: ~102
  • Type: String (quantity)
  • Description: Maximum memory allowed
  • Default: 8Gi
  • Format: <number>Gi or <number>Mi

CPU Request

  • Variable: resources.requests.cpu
  • File: k8s/statefulset.yaml
  • Line: ~100
  • Type: String (quantity)
  • Description: Minimum CPU to reserve
  • Default: 1000m (1 core)
  • Format: <number>m (millicores) or <number> (cores)

CPU Limit

  • Variable: resources.limits.cpu
  • File: k8s/statefulset.yaml
  • Line: ~103
  • Type: String (quantity)
  • Description: Maximum CPU allowed
  • Default: 4000m (4 cores)
  • Format: <number>m (millicores) or <number> (cores)

Storage Size

  • Variable: storage (under volumeClaimTemplates)
  • File: k8s/statefulset.yaml
  • Line: ~120
  • Type: String (quantity)
  • Description: Size of home directory PVC
  • Default: 10Gi
  • Format: <number>Gi or <number>Ti

Happy Server URL

  • Variable: happy-server-url
  • File: k8s/configmap.yaml
  • Line: ~12 (commented)
  • Type: String (URL)
  • Description: Custom Happy Coder server
  • Default: https://api.cluster-fluster.com
  • When to set: Self-hosted Happy instance only

Happy Webapp URL

  • Variable: happy-webapp-url
  • File: k8s/configmap.yaml
  • Line: ~13 (commented)
  • Type: String (URL)
  • Description: Custom Happy Coder webapp
  • Default: https://app.happy.engineering
  • When to set: Self-hosted Happy instance only

Display Width

  • Variable: DISPLAY_WIDTH
  • File: k8s/statefulset.yaml
  • Line: ~56
  • Type: String (number)
  • Description: VNC display width in pixels
  • Default: 1920

Display Height

  • Variable: DISPLAY_HEIGHT
  • File: k8s/statefulset.yaml
  • Line: ~58
  • Type: String (number)
  • Description: VNC display height in pixels
  • Default: 1080

User ID

  • Variable: USER_ID
  • File: k8s/statefulset.yaml
  • Line: ~51
  • Type: String (number)
  • Description: UID for claude user
  • Default: 1000

Group ID

  • Variable: GROUP_ID
  • File: k8s/statefulset.yaml
  • Line: ~53
  • Type: String (number)
  • Description: GID for claude user
  • Default: 1000

StatefulSet Replicas

  • Variable: replicas
  • File: k8s/statefulset.yaml
  • Line: ~21
  • Type: Integer
  • Description: Number of container instances
  • Default: 1
  • Note: Each replica gets own home PVC

Environment Variables (Runtime)

These are set at runtime, not in configuration files:

GITHUB_REPO

  • Type: String (URL)
  • Description: Repository URL (from ConfigMap)
  • Required: Yes
  • Source: ConfigMap antigravity.github-repo

GITHUB_TOKEN

  • Type: String
  • Description: GitHub PAT (from Secret)
  • Required: No (only for private repos)
  • Source: Secret antigravity.github-token

VNC_PASSWORD

  • Type: String
  • Description: VNC password (from Secret)
  • Required: No
  • Source: Secret antigravity.vnc-password

HAPPY_SERVER_URL

  • Type: String (URL)
  • Description: Happy server URL (from ConfigMap)
  • Required: No
  • Source: ConfigMap antigravity.happy-server-url

HAPPY_WEBAPP_URL

  • Type: String (URL)
  • Description: Happy webapp URL (from ConfigMap)
  • Required: No
  • Source: ConfigMap antigravity.happy-webapp-url

HAPPY_HOME_DIR

  • Type: String (path)
  • Description: Happy data directory
  • Required: No
  • Default: /home/claude/.happy
  • Source: Hardcoded in StatefulSet

HAPPY_EXPERIMENTAL

  • Type: String (boolean)
  • Description: Enable Happy experimental features
  • Required: No
  • Default: true
  • Source: Hardcoded in StatefulSet

Variable Groups by Use Case

Minimal Deployment

Only these variables are required for basic deployment:

  1. storageClassName
  2. github-repo
  3. parentRefs.name
  4. parentRefs.namespace
  5. hostnames

Private Repository Deployment

Add these for private repos:

  1. All minimal deployment variables
  2. github-token (sealed secret)

Production Deployment

Recommended for production:

  1. All private repository variables
  2. vnc-password (sealed secret)
  3. resources.requests.* (adjusted for workload)
  4. resources.limits.* (adjusted for workload)
  5. namespace (dedicated namespace)

Multi-User Deployment

For multiple users:

  1. All production deployment variables
  2. replicas (set to number of users)
  3. Larger storage size for home PVCs

Quick Copy Templates

Minimal Required Variables

# k8s/statefulset.yaml
storageClassName: "CHANGE_ME"  # Line ~117

# k8s/configmap.yaml
github-repo: "CHANGE_ME"  # Line ~9

# k8s/httproute.yaml
parentRefs:
- name: CHANGE_ME  # Line ~8
  namespace: CHANGE_ME  # Line ~9
hostnames:
- "CHANGE_ME"  # Line ~11

With Secrets

kubectl create secret generic antigravity-secrets \
  --from-literal=github-token='CHANGE_ME' \
  --from-literal=vnc-password='CHANGE_ME' \
  --dry-run=client -o yaml | \
  kubeseal --format=yaml > k8s/sealedsecrets.yaml

With Resource Adjustments

# k8s/statefulset.yaml (lines ~98-103)
resources:
  requests:
    memory: "CHANGE_ME"  # e.g., 4Gi
    cpu: "CHANGE_ME"     # e.g., 2000m
  limits:
    memory: "CHANGE_ME"  # e.g., 16Gi
    cpu: "CHANGE_ME"     # e.g., 8000m
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