Kubernetes Deployment

Kubernetes deployment provides the most scalable and production-ready way to run Probo. This method is recommended for:

• Production environments
• High-availability setups
• Auto-scaling requirements
• Multi-tenant deployments

Prerequisites

• Kubernetes cluster 1.23+
• Helm 3.8+
• kubectl configured for your cluster
• Managed PostgreSQL database
• S3-compatible object storage

Quick Start

1. Generate Secrets

   export ENCRYPTION_KEY=$(openssl rand -base64 32)
   export COOKIE_SECRET=$(openssl rand -base64 32)
   export PASSWORD_PEPPER=$(openssl rand -base64 32)
   export TRUST_TOKEN_SECRET=$(openssl rand -base64 32)

2. Add Helm Repository

   # If using remote Helm chart (when available)
   helm repo add probo https://charts.getprobo.com
   helm repo update
   
   # Or clone the repository for local chart
   git clone https://github.com/getprobo/probo.git
   cd probo/contrib/helm

3. Install with Managed Services

   helm install my-probo ./charts/probo \
    --set probo.baseUrl="probo.example.com" \
    --set probo.encryptionKey="$ENCRYPTION_KEY" \
    --set probo.auth.cookieSecret="$COOKIE_SECRET" \
    --set probo.auth.passwordPepper="$PASSWORD_PEPPER" \
    --set probo.trustAuth.tokenSecret="$TRUST_TOKEN_SECRET" \
    --set postgresql.enabled=false \
    --set postgresql.host="your-managed-db.example.com" \
    --set postgresql.password="your-db-password" \
   --set seaweedfs.enabled=false \
   --set s3.region="us-east-1" \
   --set s3.bucket="your-bucket-name" \
   --set s3.accessKeyId="your-access-key" \
   --set s3.secretAccessKey="your-secret-key"

4. Access the Application

   # Port forward for testing
   kubectl port-forward svc/my-probo 8080:8080
   
   # Or get LoadBalancer IP
   kubectl get svc my-probo-haproxy-ingress

Production Deployment

Create Production Values File

# Copy the example values
cp charts/probo/values-production.yaml.example values-production.yaml

Edit values-production.yaml:

# Production configuration
replicaCount: 3

probo:
  baseUrl: "probo.example.com"
  encryptionKey: "" # Set via --set or external secrets

  auth:
    cookieSecret: "" # Set via --set or external secrets
    passwordPepper: "" # Set via --set or external secrets
    cookieDomain: "probo.example.com"
    cookieSecure: true

  trustAuth:
    tokenSecret: "" # Set via --set or external secrets
    cookieDomain: "probo.example.com"

  cors:
    allowedOrigins:
      - "https://probo.example.com"

  mailer:
    senderEmail: "no-reply@example.com"
    smtp:
      addr: "smtp.example.com:587"
      user: "smtp-username"
      password: "smtp-password"
      tlsRequired: true

# Disable demo services
postgresql:
  enabled: false
  host: "your-managed-db.example.com"
  password: "your-secure-db-password"

seaweedfs:
  enabled: false

# Production S3 configuration
s3:
  region: "us-east-1"
  bucket: "your-production-bucket"
  accessKeyId: "your-access-key"
  secretAccessKey: "your-secret-key"
  # usePathStyle: true  # Required for SeaweedFS — AWS_USE_PATH_STYLE forces path-style URLs (e.g. host/bucket) instead of virtual-hosted (bucket.host)

# Resource limits
resources:
  limits:
    cpu: "2000m"
    memory: "4Gi"
  requests:
    cpu: "500m"
    memory: "1Gi"

# Auto-scaling
autoscaling:
  enabled: true
  minReplicas: 3
  maxReplicas: 10
  targetCPUUtilizationPercentage: 70

# Ingress configuration
ingress:
  enabled: true
  className: "haproxy"
  hosts:
    - host: probo.example.com
      paths:
        - path: /
          pathType: Prefix
  tls:
    - secretName: probo-tls
      hosts:
        - probo.example.com

Deploy with Production Config

helm install probo ./charts/probo \
  --set probo.encryptionKey="$ENCRYPTION_KEY" \
  --set probo.auth.cookieSecret="$COOKIE_SECRET" \
  --set probo.auth.passwordPepper="$PASSWORD_PEPPER" \
  --set probo.trustAuth.tokenSecret="$TRUST_TOKEN_SECRET" \
  --set postgresql.password="$DB_PASSWORD" \
  --set s3.accessKeyId="$S3_ACCESS_KEY" \
  --set s3.secretAccessKey="$S3_SECRET_KEY" \
  -f values-production.yaml

Cloud Provider Examples

AWS Deployment

# Prerequisites:
# - Amazon EKS cluster
# - Amazon RDS PostgreSQL instance
# - S3 bucket

helm install probo ./charts/probo \
  --set probo.encryptionKey="$ENCRYPTION_KEY" \
  --set probo.auth.cookieSecret="$COOKIE_SECRET" \
  --set probo.auth.passwordPepper="$PASSWORD_PEPPER" \
  --set probo.trustAuth.tokenSecret="$TRUST_TOKEN_SECRET" \
  --set postgresql.enabled=false \
  --set postgresql.host="mydb.abc123.us-east-1.rds.amazonaws.com" \
  --set postgresql.password="$RDS_PASSWORD" \
  --set seaweedfs.enabled=false \
  --set s3.region="us-east-1" \
  --set s3.bucket="my-probo-bucket" \
  --set s3.accessKeyId="$AWS_ACCESS_KEY" \
  --set s3.secretAccessKey="$AWS_SECRET_KEY"

Google Cloud Deployment

# Prerequisites:
# - GKE cluster
# - Cloud SQL PostgreSQL instance
# - Cloud Storage bucket with HMAC keys

helm install probo ./charts/probo \
  --set probo.encryptionKey="$ENCRYPTION_KEY" \
  --set probo.auth.cookieSecret="$COOKIE_SECRET" \
  --set probo.auth.passwordPepper="$PASSWORD_PEPPER" \
  --set probo.trustAuth.tokenSecret="$TRUST_TOKEN_SECRET" \
  --set postgresql.enabled=false \
  --set postgresql.host="10.0.0.5" \
  --set postgresql.password="$CLOUDSQL_PASSWORD" \
  --set seaweedfs.enabled=false \
  --set s3.endpoint="https://storage.googleapis.com" \
  --set s3.bucket="my-probo-bucket" \
  --set s3.accessKeyId="$HMAC_ACCESS_KEY" \
  --set s3.secretAccessKey="$HMAC_SECRET"

Azure Deployment

# Prerequisites:
# - AKS cluster
# - Azure Database for PostgreSQL
# - Azure Blob Storage with S3 compatibility

helm install probo ./charts/probo \
  --set probo.encryptionKey="$ENCRYPTION_KEY" \
  --set probo.auth.cookieSecret="$COOKIE_SECRET" \
  --set probo.auth.passwordPepper="$PASSWORD_PEPPER" \
  --set probo.trustAuth.tokenSecret="$TRUST_TOKEN_SECRET" \
  --set postgresql.enabled=false \
  --set postgresql.host="mydb.postgres.database.azure.com" \
  --set postgresql.password="$AZURE_DB_PASSWORD" \
  --set seaweedfs.enabled=false \
  --set s3.endpoint="https://mystorageaccount.blob.core.windows.net" \
  --set s3.bucket="my-probo-container" \
  --set s3.usePathStyle=true \
  --set s3.accessKeyId="$AZURE_ACCESS_KEY" \
  --set s3.secretAccessKey="$AZURE_SECRET_KEY"

Architecture

What Gets Deployed

The Helm chart deploys:

• Probo Application - Main Go binary (3+ replicas for HA)
• Chrome Headless - PDF generation service (optional)
• HAProxy Ingress - Load balancer with TCP/HTTP routing
• Services - Kubernetes services for internal communication
• ConfigMaps - Configuration data
• Secrets - Sensitive configuration

External Dependencies

Required external services:

• PostgreSQL Database - Managed database service
• S3 Storage - Object storage for files
• SMTP Server - Email notifications (optional)

Networking Architecture

Internet
    ↓
LoadBalancer (HAProxy Ingress)
├─ Port 80 (TCP) → probo:80 (ACME/HTTP)
├─ Port 443 (TCP) → probo:443 (HTTPS)
└─ Host routing → probo:8080 (Backoffice)
    ↓
Probo Pods (3+ replicas)
├─ External PostgreSQL
├─ External S3 Storage
└─ Chrome Service (optional)

Security Configuration

TLS Certificates

Using cert-manager (Recommended)

# Install cert-manager first
helm repo add jetstack https://charts.jetstack.io
helm install cert-manager jetstack/cert-manager \
  --namespace cert-manager \
  --create-namespace \
  --set installCRDs=true

# Create ClusterIssuer
apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: letsencrypt-prod
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    email: admin@example.com
    privateKeySecretRef:
      name: letsencrypt-prod
    solvers:
    - http01:
        ingress:
          class: haproxy

# Update ingress with cert-manager annotations
ingress:
  annotations:
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
  tls:
    - secretName: probo-tls
      hosts:
        - probo.example.com

Manual Certificate Management

# Create TLS secret manually
kubectl create secret tls probo-tls \
  --cert=path/to/cert.pem \
  --key=path/to/key.pem

External Secrets Management

Using External Secrets Operator

# Install External Secrets Operator
helm repo add external-secrets https://charts.external-secrets.io
helm install external-secrets external-secrets/external-secrets \
  --namespace external-secrets-system \
  --create-namespace

# Create SecretStore (AWS example)
apiVersion: external-secrets.io/v1beta1
kind: SecretStore
metadata:
  name: aws-secrets-manager
spec:
  provider:
    aws:
      service: SecretsManager
      region: us-east-1
      auth:
        secretRef:
          accessKeyID:
            name: aws-creds
            key: access-key-id
          secretAccessKey:
            name: aws-creds
            key: secret-access-key

# Create ExternalSecret
apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: probo-secrets
spec:
  secretStoreRef:
    name: aws-secrets-manager
    kind: SecretStore
  target:
    name: probo-secrets
  data:
    - secretKey: encryption-key
      remoteRef:
        key: probo/encryption-key
    # Add other secrets...

Monitoring and Observability

Prometheus Metrics

Enable ServiceMonitor for Prometheus Operator:

metrics:
  serviceMonitor:
    enabled: true
    interval: 30s
    labels:
      app: probo

Custom Metrics Queries

# Application requests per second
rate(http_requests_total[5m])

# Database connection pool usage
probod_db_pool_connections_in_use / probod_db_pool_max_connections

# Memory usage
container_memory_usage_bytes{pod=~"probo-.*"}

Log Aggregation

Use Fluent Bit or similar to collect logs:

# Fluent Bit DaemonSet example
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluent-bit
spec:
  template:
    spec:
      containers:
        - name: fluent-bit
          image: fluent/fluent-bit:latest
          volumeMounts:
            - name: varlog
              mountPath: /var/log
            - name: config
              mountPath: /fluent-bit/etc

Backup and Disaster Recovery

Database Backups

# Create backup job
kubectl create job --from=cronjob/postgres-backup backup-$(date +%Y%m%d-%H%M%S)

# Manual backup
kubectl run postgres-backup --image=postgres:17 --rm -it --restart=Never -- \
  pg_dump -h your-db-host -U probod probod > backup.sql

Application Data Backup

# Backup persistent volumes (if using local storage)
kubectl get pv
kubectl get pvc

# Use velero for cluster backups
velero backup create probo-backup --include-namespaces=default

Troubleshooting

Common Issues

1. Pod startup failures:

   kubectl describe pod <pod-name>
   kubectl logs <pod-name> -c probo

2. Database connection issues:

   # Test database connectivity
   kubectl run pg-test --image=postgres:17 --rm -it --restart=Never -- \
     pg_isready -h your-db-host -p 5432

3. Ingress not working:

   kubectl get ingress
   kubectl describe ingress probo
   kubectl logs -n ingress-system <ingress-controller-pod>

Debugging Commands

# Check all resources
kubectl get all -l app.kubernetes.io/name=probo

# View configuration
kubectl get configmap probo -o yaml
kubectl get secret probo -o yaml

# Check events
kubectl get events --sort-by=.metadata.creationTimestamp

# Access pod shell
kubectl exec -it <pod-name> -- /bin/sh

Upgrading

Rolling Updates

# Update to new version
helm upgrade probo ./charts/probo \
  --set image.tag="v1.2.0" \
  -f values-production.yaml

# Check rollout status
kubectl rollout status deployment/probo

# Rollback if needed
helm rollback probo 1

Database Migrations

# Check migration status
kubectl logs deployment/probo | grep migration

# Run migrations manually if needed
kubectl exec deployment/probo -- probod migrate

High Availability Configuration

Multi-Zone Deployment

# Spread pods across zones
affinity:
  podAntiAffinity:
    preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 100
        podAffinityTerm:
          labelSelector:
            matchExpressions:
              - key: app.kubernetes.io/name
                operator: In
                values:
                  - probo
          topologyKey: topology.kubernetes.io/zone

Auto-scaling

autoscaling:
  enabled: true
  minReplicas: 3
  maxReplicas: 20
  targetCPUUtilizationPercentage: 70
  targetMemoryUtilizationPercentage: 80

Pod Disruption Budgets

apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: probo-pdb
spec:
  minAvailable: 2
  selector:
    matchLabels:
      app.kubernetes.io/name: probo