aula-06: Deploy n8n via Helm com Queue Mode

aula-06/custom-values.yaml

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+# =============================================================================
+# n8n Helm Chart - Custom Values
+# =============================================================================
+# Aula 06 - Deploy n8n via Helm
+#
+# Chart: community-charts/n8n
+# Docs: https://community-charts.github.io/docs/charts/n8n/configuration
+# =============================================================================
+
+# -----------------------------------------------------------------------------
+# Imagem
+# -----------------------------------------------------------------------------
+image:
+  repository: n8nio/n8n
+  tag: "2.1.4"
+  pullPolicy: IfNotPresent
+
+# -----------------------------------------------------------------------------
+# Chave de Criptografia
+# -----------------------------------------------------------------------------
+encryptionKey: "workshop-n8n-encryption-key-32ch"
+
+# -----------------------------------------------------------------------------
+# Banco de Dados PostgreSQL
+# -----------------------------------------------------------------------------
+db:
+  type: postgresdb
+
+postgresql:
+  enabled: true
+  auth:
+    database: n8n
+    username: n8n
+    password: "n8n-postgres-workshop-2025"
+  primary:
+    persistence:
+      enabled: true
+      size: 5Gi
+
+# -----------------------------------------------------------------------------
+# Redis (necessário para Queue Mode)
+# -----------------------------------------------------------------------------
+redis:
+  enabled: true
+  architecture: standalone
+  auth:
+    enabled: true
+    password: "n8n-redis-workshop-2025"
+
+# -----------------------------------------------------------------------------
+# Ingress NGINX
+# -----------------------------------------------------------------------------
+ingress:
+  enabled: true
+  className: nginx
+  annotations:
+    nginx.ingress.kubernetes.io/proxy-body-size: "50m"
+    nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
+    nginx.ingress.kubernetes.io/proxy-send-timeout: "3600"
+  hosts:
+    - host: n8n.localhost
+      paths:
+        - path: /
+          pathType: Prefix
+
+# -----------------------------------------------------------------------------
+# Main Node
+# -----------------------------------------------------------------------------
+main:
+  extraEnvVars:
+    N8N_SECURE_COOKIE: "false"  # Permite HTTP sem HTTPS (apenas para dev/workshop)
+  persistence:
+    enabled: true
+    size: 2Gi
+    mountPath: "/home/node/.n8n"
+  resources:
+    requests:
+      cpu: 100m
+      memory: 256Mi
+    limits:
+      cpu: 1000m
+      memory: 1Gi
+
+# -----------------------------------------------------------------------------
+# Workers (Queue Mode)
+# -----------------------------------------------------------------------------
+worker:
+  mode: queue
+  count: 2
+  concurrency: 10
+  extraEnvVars:
+    N8N_SECURE_COOKIE: "false"
+  resources:
+    requests:
+      cpu: 100m
+      memory: 256Mi
+    limits:
+      cpu: 500m
+      memory: 512Mi
+  autoscaling:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 5
+    metrics:
+      - type: Resource
+        resource:
+          name: cpu
+          target:
+            type: Utilization
+            averageUtilization: 70
+      - type: Resource
+        resource:
+          name: memory
+          target:
+            type: Utilization
+            averageUtilization: 80
+
+# -----------------------------------------------------------------------------
+# Webhooks (Queue Mode)
+# -----------------------------------------------------------------------------
+webhook:
+  mode: queue
+  count: 1
+  url: "http://n8n.localhost"
+  extraEnvVars:
+    N8N_SECURE_COOKIE: "false"
+  resources:
+    requests:
+      cpu: 50m
+      memory: 128Mi
+    limits:
+      cpu: 250m
+      memory: 256Mi
+  autoscaling:
+    enabled: true
+    minReplicas: 1
+    maxReplicas: 3
+    metrics:
+      - type: Resource
+        resource:
+          name: cpu
+          target:
+            type: Utilization
+            averageUtilization: 70
+
+# -----------------------------------------------------------------------------
+# Configurações de Segurança
+# -----------------------------------------------------------------------------
+securityContext:
+  runAsNonRoot: true
+  runAsUser: 1000

aula-06/setup.sh

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+#!/bin/bash
+# =============================================================================
+# Setup da Aula 06 - n8n via Helm
+# =============================================================================
+#
+# Este script instala e configura:
+#   1. NGINX Ingress Controller (se necessário)
+#   2. n8n com PostgreSQL, Redis, Workers e Webhooks
+#
+# Pré-requisitos:
+#   - Kubernetes cluster rodando (k3s, minikube, kind, etc)
+#   - kubectl configurado
+#   - Helm 3.x instalado
+#
+# Uso:
+#   chmod +x setup.sh
+#   ./setup.sh
+#
+# =============================================================================
+
+set -e  # Para na primeira falha
+
+# Cores para output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Funções de log
+log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
+log_success() { echo -e "${GREEN}[OK]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+log_error() { echo -e "${RED}[ERRO]${NC} $1"; }
+
+# Diretório do script
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# =============================================================================
+# VERIFICAÇÕES INICIAIS
+# =============================================================================
+
+log_info "Verificando pré-requisitos..."
+
+# Verificar kubectl
+if ! command -v kubectl &> /dev/null; then
+    log_error "kubectl não encontrado. Instale o kubectl primeiro."
+    exit 1
+fi
+log_success "kubectl encontrado"
+
+# Verificar conexão com cluster
+if ! kubectl cluster-info &> /dev/null; then
+    log_error "Não foi possível conectar ao cluster Kubernetes."
+    exit 1
+fi
+log_success "Conectado ao cluster Kubernetes"
+
+# Verificar helm
+if ! command -v helm &> /dev/null; then
+    log_error "Helm não encontrado. Instale o Helm >= 3.14 primeiro."
+    log_info "Instalação: https://helm.sh/docs/intro/install/"
+    exit 1
+fi
+log_success "Helm $(helm version --short) encontrado"
+
+echo ""
+
+# =============================================================================
+# 1. INSTALAR NGINX INGRESS (se não existir)
+# =============================================================================
+
+log_info "=== Verificando NGINX Ingress ==="
+
+if kubectl get ingressclass nginx &> /dev/null; then
+    log_success "NGINX Ingress já está instalado"
+else
+    log_info "Instalando NGINX Ingress Controller..."
+    helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx 2>/dev/null || true
+    helm repo update
+
+    helm install nginx-ingress ingress-nginx/ingress-nginx \
+        --namespace ingress-nginx \
+        --create-namespace \
+        --wait
+
+    log_success "NGINX Ingress instalado"
+fi
+echo ""
+
+# =============================================================================
+# 2. CRIAR NAMESPACE E APLICAR SECRETS
+# =============================================================================
+
+log_info "=== Configurando namespace n8n ==="
+
+# Criar namespace se não existir
+if kubectl get namespace n8n &> /dev/null; then
+    log_success "Namespace n8n já existe"
+else
+    log_info "Criando namespace n8n..."
+    kubectl create namespace n8n
+    log_success "Namespace n8n criado"
+fi
+
+echo ""
+
+# =============================================================================
+# 3. INSTALAR n8n VIA HELM
+# =============================================================================
+
+log_info "=== Instalando n8n ==="
+
+# Adicionar repo do community-charts
+log_info "Adicionando repositório Helm do community-charts..."
+helm repo add community-charts https://community-charts.github.io/helm-charts 2>/dev/null || true
+helm repo update
+
+# Verificar se já está instalado
+if helm status n8n -n n8n &> /dev/null; then
+    log_warn "n8n já está instalado. Atualizando..."
+    helm upgrade n8n community-charts/n8n \
+        --namespace n8n \
+        --values "$SCRIPT_DIR/custom-values.yaml" \
+        --wait \
+        --timeout 10m
+    log_success "n8n atualizado com sucesso!"
+else
+    log_info "Instalando n8n..."
+    helm install n8n community-charts/n8n \
+        --namespace n8n \
+        --values "$SCRIPT_DIR/custom-values.yaml" \
+        --wait \
+        --timeout 10m
+    log_success "n8n instalado com sucesso!"
+fi
+
+echo ""
+
+# =============================================================================
+# 4. AGUARDAR PODS FICAREM PRONTOS
+# =============================================================================
+
+log_info "=== Aguardando pods ficarem prontos ==="
+
+log_info "Aguardando PostgreSQL..."
+kubectl wait --for=condition=ready pod \
+    -l app.kubernetes.io/name=postgresql \
+    -n n8n \
+    --timeout=180s 2>/dev/null || log_warn "Timeout aguardando PostgreSQL"
+
+log_info "Aguardando Redis..."
+kubectl wait --for=condition=ready pod \
+    -l app.kubernetes.io/name=redis \
+    -n n8n \
+    --timeout=120s 2>/dev/null || log_warn "Timeout aguardando Redis"
+
+log_info "Aguardando n8n main..."
+kubectl wait --for=condition=ready pod \
+    -l app.kubernetes.io/component=main \
+    -n n8n \
+    --timeout=180s 2>/dev/null || log_warn "Timeout aguardando n8n main"
+
+log_info "Aguardando n8n workers..."
+kubectl wait --for=condition=ready pod \
+    -l app.kubernetes.io/component=worker \
+    -n n8n \
+    --timeout=120s 2>/dev/null || log_warn "Timeout aguardando workers"
+
+log_info "Aguardando n8n webhooks..."
+kubectl wait --for=condition=ready pod \
+    -l app.kubernetes.io/component=webhook \
+    -n n8n \
+    --timeout=120s 2>/dev/null || log_warn "Timeout aguardando webhooks"
+
+log_success "Todos os componentes estão rodando!"
+echo ""
+
+# =============================================================================
+# RESUMO FINAL
+# =============================================================================
+
+echo "=============================================="
+echo -e "${GREEN}  Setup Completo!${NC}"
+echo "=============================================="
+echo ""
+echo "Componentes instalados:"
+echo "  - NGINX Ingress Controller"
+echo "  - n8n (namespace: n8n)"
+echo "    - Main node"
+echo "    - Workers (2-5 réplicas, autoscaling)"
+echo "    - Webhooks (1-3 réplicas, autoscaling)"
+echo "    - PostgreSQL"
+echo "    - Redis"
+echo ""
+echo "Acesso:"
+echo "  URL: http://n8n.localhost"
+echo ""
+echo "  Se n8n.localhost não resolver, adicione ao /etc/hosts:"
+echo "    127.0.0.1 n8n.localhost"
+echo ""
+echo "Comandos úteis:"
+echo "  # Ver todos os pods"
+echo "  kubectl get pods -n n8n"
+echo ""
+echo "  # Ver logs do n8n"
+echo "  kubectl logs -f -l app.kubernetes.io/component=main -n n8n"
+echo ""
+echo "  # Ver HPA (autoscaler)"
+echo "  kubectl get hpa -n n8n"
+echo ""
+echo "  # Ver ingress"
+echo "  kubectl get ingress -n n8n"
+echo ""
+echo "  # Desinstalar"
+echo "  helm uninstall n8n -n n8n"
+echo ""
+echo "  # Fazer upgrade do helm chart"
+echo "  helm upgrade --reuse-values --values --custom-values.yaml n8n community-charts/n8n --namespace n8n"
+echo ""
+echo "=============================================="
+echo ""
+
+# Mostrar status atual
+log_info "Status atual dos pods:"
+echo ""
+kubectl get pods -n n8n
+echo ""
+log_info "Status do HPA:"
+echo ""
+kubectl get hpa -n n8n 2>/dev/null || echo "HPA ainda não criado"
+echo ""
+log_info "Status do Ingress:"
+echo ""
+kubectl get ingress -n n8n
+echo ""