Deployment

info

This page covers deploying Flow Control to Kubernetes with Flux GitOps.

Flow Control series

Prerequisites

Kubernetes cluster with Flux installed
PostgreSQL (dedicated instance or shared)
OIDC provider (Zitadel, Keycloak, etc.) for authentication
GitLab with API token for pipeline tracking
Container registry for images

Kubernetes structure

k8s/prod/
├── 20-secret-db.enc.yaml      # PostgreSQL credentials (SOPS)
├── 35-pvc-db.yaml             # Database PVC
├── 40-db-deployment.yaml      # PostgreSQL deployment
├── deployment.yaml            # App deployment
├── service.yaml               # ClusterIP service
├── ingress.yaml               # Ingress
├── cronjob.yaml               # GitLab/commits import
├── cronjob-k8s.yaml           # K8s deployments import
├── kustomization.yaml         # Kustomize base
└── secrets/
    ├── stats-secrets.enc.yaml       # GitLab token
    ├── stats-auth-secret.enc.yaml   # OIDC credentials
    ├── stats-daemon-secret.enc.yaml # Daemon API key
    └── stats-prod-registry.enc.yaml # Image pull secret

Database setup

1. Create namespace

# namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
  name: stats

2. Database credentials (SOPS encrypted)

# 20-secret-db.enc.yaml
apiVersion: v1
kind: Secret
metadata:
  name: stats-db-secret
  namespace: stats
type: Opaque
stringData:
  POSTGRES_USER: stats
  POSTGRES_PASSWORD: your-secure-password
  POSTGRES_DB: stats
  DATABASE_URL: postgresql://stats:your-secure-password@stats-db:5432/stats

Encrypt with SOPS:

sops --encrypt --in-place 20-secret-db.enc.yaml

3. Database PVC

# 35-pvc-db.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: stats-db-pvc
  namespace: stats
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: nfs-client
  resources:
    requests:
      storage: 5Gi

4. Database deployment

# 40-db-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: stats-db
  namespace: stats
spec:
  replicas: 1
  selector:
    matchLabels:
      app: stats-db
  template:
    metadata:
      labels:
        app: stats-db
    spec:
      containers:
        - name: postgres
          image: postgres:16-alpine
          ports:
            - containerPort: 5432
          envFrom:
            - secretRef:
                name: stats-db-secret
          volumeMounts:
            - name: data
              mountPath: /var/lib/postgresql/data
          livenessProbe:
            exec:
              command: ["pg_isready", "-U", "stats", "-d", "stats"]
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
          readinessProbe:
            exec:
              command: ["pg_isready", "-U", "stats", "-d", "stats"]
            initialDelaySeconds: 5
            periodSeconds: 5
            timeoutSeconds: 5
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: stats-db-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: stats-db
  namespace: stats
spec:
  selector:
    app: stats-db
  ports:
    - port: 5432

Application deployment

Deployment manifest

# deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: stats-dashboard
  namespace: stats
spec:
  replicas: 1
  selector:
    matchLabels:
      app: stats-dashboard
  template:
    metadata:
      labels:
        app: stats-dashboard
    spec:
      # hostAliases for OIDC provider DNS resolution (if needed)
      hostAliases:
        - ip: "10.50.1.5"  # Your OIDC provider IP
          hostnames:
            - "auth.example.com"
      containers:
        - name: app
          image: registry.example.com/tools/stats-dashboard:prod-latest # {"$imagepolicy": "flux-system:stats-prod-policy"}
          ports:
            - containerPort: 3000
          envFrom:
            - secretRef:
                name: stats-db-secret
            - secretRef:
                name: stats-secrets
            - secretRef:
                name: stats-auth-secret
            - secretRef:
                name: stats-daemon-secret
          env:
            - name: GITLAB_API_URL
              value: "http://gitlab-webservice-default.gitlab.svc.cluster.local:8080/api/v4"
            - name: AUTH_URL
              value: "https://your-stats.example.com"
            - name: AUTH_TRUST_HOST
              value: "true"
            - name: AUTH_ISSUER
              value: "https://auth.example.com"
          readinessProbe:
            httpGet:
              path: /api/health
              port: 3000
            initialDelaySeconds: 10
            periodSeconds: 5
          livenessProbe:
            httpGet:
              path: /api/health
              port: 3000
            initialDelaySeconds: 30
            periodSeconds: 10
      imagePullSecrets:
        - name: stats-prod-registry

Service and Ingress

# service.yaml
apiVersion: v1
kind: Service
metadata:
  name: stats-dashboard
  namespace: stats
spec:
  selector:
    app: stats-dashboard
  ports:
    - port: 3000
---
# ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: stats-dashboard
  namespace: stats
  annotations:
    cert-manager.io/cluster-issuer: letsencrypt-prod
spec:
  ingressClassName: nginx
  tls:
    - hosts:
        - your-stats.example.com
      secretName: stats-dashboard-tls
  rules:
    - host: your-stats.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: stats-dashboard
                port:
                  number: 3000

CronJobs

GitLab and commits import

# cronjob.yaml
apiVersion: batch/v1
kind: CronJob
metadata:
  name: stats-import-gitlab
  namespace: stats
spec:
  schedule: "*/15 * * * *"  # Every 15 minutes
  jobTemplate:
    spec:
      template:
        spec:
          containers:
            - name: import
              image: curlimages/curl:latest
              command:
                - /bin/sh
                - -c
                - |
                  curl -X POST http://stats-dashboard:3000/api/import/gitlab
                  curl -X POST http://stats-dashboard:3000/api/import/commits
          restartPolicy: OnFailure

K8s deployments import

# cronjob-k8s.yaml
apiVersion: batch/v1
kind: CronJob
metadata:
  name: stats-import-k8s
  namespace: stats
spec:
  schedule: "*/30 * * * *"  # Every 30 minutes
  jobTemplate:
    spec:
      template:
        spec:
          serviceAccountName: stats-k8s-reader
          containers:
            - name: import
              image: bitnami/kubectl:latest
              command:
                - /bin/sh
                - -c
                - |
                  # Gather deployment data and POST to dashboard
                  kubectl get deployments --all-namespaces -o json | \
                    curl -X POST -H "Content-Type: application/json" \
                    -d @- http://stats-dashboard:3000/api/import/k8s
          restartPolicy: OnFailure

Secrets

GitLab token

# secrets/stats-secrets.enc.yaml
apiVersion: v1
kind: Secret
metadata:
  name: stats-secrets
  namespace: stats
type: Opaque
stringData:
  GITLAB_TOKEN: glpat-xxxxxxxxxxxxxxxxxxxx

OIDC credentials

# secrets/stats-auth-secret.enc.yaml
apiVersion: v1
kind: Secret
metadata:
  name: stats-auth-secret
  namespace: stats
type: Opaque
stringData:
  AUTH_SECRET: your-32-char-auth-secret
  AUTH_CLIENT_ID: your-oidc-client-id
  AUTH_CLIENT_SECRET: your-oidc-client-secret

Daemon API key

# secrets/stats-daemon-secret.enc.yaml
apiVersion: v1
kind: Secret
metadata:
  name: stats-daemon-secret
  namespace: stats
type: Opaque
stringData:
  DAEMON_API_KEY: your-secure-api-key

This key is shared by all three local daemons (cursor-sync, music-sync, health-sync) and the HealthSync iOS app.

Key rotation procedure:

Generate new key: openssl rand -base64 32
Decrypt SOPS: sops -d -i k8s/prod/secrets/stats-daemon-secret.enc.yaml
Replace the key value
Re-encrypt: sops -e -i k8s/prod/secrets/stats-daemon-secret.enc.yaml
Commit, push, wait for pipeline, flux reconcile
Update all installed daemon plists in ~/Library/LaunchAgents/, reload each with launchctl
Update the API key in HealthSync iOS app Settings

Flux GitOps

Image automation

# flux-system/stats-prod-gitrepository.yaml
apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: stats-prod
  namespace: flux-system
spec:
  interval: 1m
  url: https://gitlab.example.com/tools/stats-dashboard.git
  ref:
    branch: main
---
# flux-system/stats-prod-imagerepository.yaml
apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImageRepository
metadata:
  name: stats-prod-repo
  namespace: flux-system
spec:
  interval: 1m
  image: registry.example.com/tools/stats-dashboard
---
# flux-system/stats-prod-imagepolicy.yaml
apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImagePolicy
metadata:
  name: stats-prod-policy
  namespace: flux-system
spec:
  imageRepositoryRef:
    name: stats-prod-repo
  filterTags:
    pattern: '^prod-(?P<ts>\d+\.\d+)$'
    extract: '$ts'
  policy:
    numerical:
      order: asc
---
# flux-system/stats-prod-automation.yaml
apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImageUpdateAutomation
metadata:
  name: stats-prod-automation
  namespace: flux-system
spec:
  interval: 1m
  sourceRef:
    kind: GitRepository
    name: stats-prod
  git:
    checkout:
      ref:
        branch: main
    commit:
      author:
        email: flux@example.com
        name: FluxCD
      messageTemplate: '{{range .Changed.Changes}}{{print .OldValue}} -> {{println .NewValue}}{{end}} [skip ci]'
    push:
      branch: main
  update:
    path: ./k8s/prod
    strategy: Setters

Database migrations

After deployment, run Prisma migrations:

# Port-forward to database
kubectl port-forward -n stats svc/stats-db 5432:5432

# Run migrations
DATABASE_URL="postgresql://stats:password@localhost:5432/stats" npx prisma db push

Monitoring

Health endpoint

The /api/health endpoint is public (excluded from auth) for K8s probes:

curl https://your-stats.example.com/api/health
# Returns: {"status":"ok"}

Uptime monitoring

Configure external monitoring (e.g., Uptime Kuma) to check /api/health every 60 seconds.

Troubleshooting

Pod not starting

kubectl logs -n stats deployment/stats-dashboard
kubectl describe pod -n stats -l app=stats-dashboard

Database connection failed

# Check database pod
kubectl logs -n stats deployment/stats-db

# Test connectivity
kubectl exec -n stats deploy/stats-dashboard -- \
  node -e "const { Pool } = require('pg'); new Pool().query('SELECT 1').then(() => console.log('OK'))"

OIDC authentication errors

Check for DNS resolution issues:

kubectl exec -n stats deploy/stats-dashboard -- \
  node -e "fetch('https://auth.example.com/.well-known/openid-configuration').then(r => r.json()).then(console.log)"

If DNS fails, add hostAliases to the deployment spec.

Flux not updating images

# Check image repository
flux get image repository stats-prod-repo -n flux-system

# Check image policy
kubectl get imagepolicy stats-prod-policy -n flux-system -o yaml

# Manual reconcile
flux reconcile image repository stats-prod-repo -n flux-system
flux reconcile image update stats-prod-automation -n flux-system

This completes the Flow Control series. For questions or issues, check the troubleshooting sections in each page.

Flow Control series​

Prerequisites​

Kubernetes structure​

Database setup​

1. Create namespace​

2. Database credentials (SOPS encrypted)​

3. Database PVC​

4. Database deployment​

Application deployment​

Deployment manifest​

Service and Ingress​

CronJobs​

GitLab and commits import​

K8s deployments import​

Secrets​

GitLab token​

OIDC credentials​

Daemon API key​

Flux GitOps​

Image automation​

Database migrations​

Monitoring​

Health endpoint​

Uptime monitoring​

Troubleshooting​

Pod not starting​

Database connection failed​

OIDC authentication errors​

Flux not updating images​