{"id":2910,"date":"2026-03-25T10:10:24","date_gmt":"2026-03-25T10:10:24","guid":{"rendered":"https:\/\/www.ucartz.com\/blog\/?p=2910"},"modified":"2026-03-25T10:10:26","modified_gmt":"2026-03-25T10:10:26","slug":"how-to-use-n8n-environment-variables-best-practices-tips","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/blog\/how-to-use-n8n-environment-variables-best-practices-tips\/","title":{"rendered":"How to Use n8n Environment Variables: Best Practices &amp; Tips"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Environment variables are simple settings that control how your application behaves without changing its core code. In <a href=\"http:\/\/n8n.io\" target=\"_blank\" rel=\"noreferrer noopener\">n8n workflow automation<\/a> , they act as the control panel that defines how your automation system runs, connects, and secures itself. When you <a href=\"https:\/\/www.ucartz.com\/blog\/how-to-install-n8n-on-vps\/\">install n8n on a VPS<\/a> using Docker, you don\u2019t hardcode things like your domain, port, or login credentials. Instead, you define them using environment variables. This keeps your setup flexible, secure, and easy to manage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You\u2019ll use environment variables in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.docker.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Docker container ecosystem<\/a> and Docker Compose setups<\/li>\n\n\n\n<li>VPS or cloud deployments<\/li>\n\n\n\n<li>Self-hosted production environments<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables let you configure and control n8n without touching the application code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Are Environment Variables? <\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables follow a simple key = value format.<br>They tell your system what settings to use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">N8N_PORT=5678<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This means: \u201cRun n8n on port 5678.\u201d Think of environment variables like a settings panel on your phone.You don\u2019t change the phone\u2019s software.You just toggle settings like Wi-Fi, brightness, or notifications<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables work the same way. They let you adjust how n8n behaves without rewriting anything.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Where are environment variables stored?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You can define them in different places depending on your setup:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. <code>.env<\/code> file (cleanest method)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A simple file where all variables are stored in one place.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">N8N_HOST=yourdomain.com<br>N8N_PROTOCOL=https<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2. <code>docker-compose.yml<\/code> (most common)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Used when running n8n with Docker.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">environment:<br>  - N8N_HOST=yourdomain.com<br>  - N8N_PORT=5678<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">3. Server environment (advanced)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Set directly in your VPS terminal:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">export N8N_HOST=yourdomain.com<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why Environment Variables Matter in n8n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables are essential because they let you control everything about your n8n setup without modifying the application itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Control behavior without editing code<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can change how n8n runs (port, domain, features) instantly just by updating values.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Security (authentication &amp; credentials)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of hardcoding usernames and passwords, you define them securely:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">N8N_BASIC_AUTH_USER=admin<br>N8N_BASIC_AUTH_PASSWORD=yourpassword<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. URLs &amp; domain configuration<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables define how users and external services access your n8n instance:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Domain name<\/li>\n\n\n\n<li>Protocol (HTTP\/HTTPS)<\/li>\n\n\n\n<li>Webhook URLs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Database connections<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When moving to production, you\u2019ll connect n8n to PostgreSQL using variables:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">DB_TYPE=postgresdb<br>DB_POSTGRESDB_HOST=localhost<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Feature control (toggle settings)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can enable or disable features easily:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Secure cookies<\/li>\n\n\n\n<li>Execution settings<\/li>\n\n\n\n<li>Logging behavior<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why this matters in real projects<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Without environment variables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You\u2019d edit code every time you change settings<\/li>\n\n\n\n<li>Your setup becomes messy and risky<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">With environment variables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Your setup is clean<\/li>\n\n\n\n<li>Changes are instant<\/li>\n\n\n\n<li>Deployment becomes predictable<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-1024x576.webp\" alt=\"how environment variables control n8n workflow execution\" class=\"wp-image-2913\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-1024x576.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-300x169.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-768x432.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-1536x864.webp 1536w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/03\/How-variables-affect-workflow-2048x1152.webp 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Essential n8n Environment Variables (The Must-Have List)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. N8N_HOST <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tells n8n what URL users access it from.Webhooks break without this. n8n generates webhook URLs like <code>http:\/\/undefined\/webhook\/xxx<\/code> instead of <code>https:\/\/yourdomain.com\/webhook\/xxx<\/code>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># If you have a domain\nN8N_HOST=n8n.yourdomain.com\n\n# If using IP address only (testing)\nN8N_HOST=45.123.456.789\n\n# If running locally\nN8N_HOST=localhost<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. N8N_PORT <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Defines what port n8n listens on inside the container. Port conflicts cause n8n to fail silently or refuse connections. Default value: <code>5678<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to change it:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Default (recommended)\nN8N_PORT=5678\n\n# If 5678 is already used by another service\nN8N_PORT=5679\n\n# Non-standard port for security through obscurity\nN8N_PORT=8888<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Port mapping in Docker Compose:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>services:\n  n8n:\n    ports:\n      - \"5678:5678\"  # host:container\n    environment:\n      - N8N_PORT=5678  # Must match container port<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">External port 5678 \u2192 Internal port 5678<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. N8N_PROTOCOL -HTTP or HTTPS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tells n8n whether it&#8217;s running over HTTP or HTTPS. Affects webhook URL generation and security warnings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># For production with SSL certificate\nN8N_PROTOCOL=https\n\n# For local development\nN8N_PROTOCOL=http<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When HTTPS is required:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Webhook integrations (Stripe, Shopify, Typeform)<\/li>\n\n\n\n<li>OAuth authentication flows<\/li>\n\n\n\n<li>Secure credential transmission<\/li>\n\n\n\n<li>Production deployments<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Setup flow:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Initial setup (testing)\nN8N_PROTOCOL=http\nN8N_HOST=45.123.456.789\n\n# After setting up SSL (production)\nN8N_PROTOCOL=https\nN8N_HOST=n8n.yourdomain.com<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. WEBHOOK_URL <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Overrides automatic webhook URL generation. Useful when running behind reverse proxy or using non-standard setup.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to use it:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Most cases - n8n auto-generates from N8N_HOST + N8N_PROTOCOL\n# No need to set WEBHOOK_URL\n\n# Behind Nginx reverse proxy with custom path\nWEBHOOK_URL=https:\/\/yourdomain.com\/automation\/\n\n# Using Cloudflare Tunnel\nWEBHOOK_URL=https:\/\/n8n-tunnel.yourdomain.com\/\n\n# Multiple n8n instances on same domain\nWEBHOOK_URL=https:\/\/yourdomain.com\/n8n-prod\/\n<strong>Structure:<\/strong>\nWEBHOOK_URL = protocol + host + path (optional)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>WEBHOOK_URL=https:\/\/api.yourcompany.com\/webhooks\/\n\nGenerates webhook URLs like:\n\nhttps:&#47;&#47;api.yourcompany.com\/webhooks\/webhook\/abc123<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5. GENERIC_TIMEZONE <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What it does:<\/strong> Sets the timezone for scheduled workflows and timestamps.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Your &#8220;9 AM daily report&#8221; runs at 9 AM UTC (4 AM EST) instead of your actual 9 AM. Standard timezone identifier (IANA format)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># United States\nGENERIC_TIMEZONE=America\/New_York        # EST\/EDT\nGENERIC_TIMEZONE=America\/Chicago         # CST\/CDT\nGENERIC_TIMEZONE=America\/Denver          # MST\/MDT\nGENERIC_TIMEZONE=America\/Los_Angeles     # PST\/PDT\n\n# Europe\nGENERIC_TIMEZONE=Europe\/London           # GMT\/BST\nGENERIC_TIMEZONE=Europe\/Paris            # CET\/CEST\nGENERIC_TIMEZONE=Europe\/Berlin           # CET\/CEST\n\n# Asia\nGENERIC_TIMEZONE=Asia\/Tokyo              # JST\nGENERIC_TIMEZONE=Asia\/Shanghai           # CST\nGENERIC_TIMEZONE=Asia\/Kolkata            # IST\n\n# Australia\nGENERIC_TIMEZONE=Australia\/Sydney        # AEDT\/AEST\n\n# UTC (not recommended for business use)\nGENERIC_TIMEZONE=UTC<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">6. N8N_BASIC_AUTH_ACTIVE -Enable Authentication<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Turns on basic username\/password authentication. Without this, anyone who finds your n8n URL can access and modify your workflows.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Enable authentication (production)\nN8N_BASIC_AUTH_ACTIVE=true\n\n# Disable authentication (local development only)\nN8N_BASIC_AUTH_ACTIVE=false<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">7. N8N_BASIC_AUTH_USER &#8211; Username<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sets the username for basic authentication. This is what you type to log into n8n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best practices:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#  Too obvious\nN8N_BASIC_AUTH_USER=admin\nN8N_BASIC_AUTH_USER=n8n\nN8N_BASIC_AUTH_USER=user\n\n#  Better\nN8N_BASIC_AUTH_USER=automation_admin\nN8N_BASIC_AUTH_USER=yourname_n8n\nN8N_BASIC_AUTH_USER=workflow_master<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Bots scan for common usernames. Using &#8220;admin&#8221; makes brute-force attacks easier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example configuration:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>N8N_BASIC_AUTH_ACTIVE=true\nN8N_BASIC_AUTH_USER=john_workflows\nN8N_BASIC_AUTH_PASSWORD=super_secure_password_here<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">8. N8N_BASIC_AUTH_PASSWORD &#8211; Password<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sets the password for basic authentication. Weak password = compromised n8n = compromised integrations = compromised business.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Password requirements:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Terrible passwords\nN8N_BASIC_AUTH_PASSWORD=password\nN8N_BASIC_AUTH_PASSWORD=123456\nN8N_BASIC_AUTH_PASSWORD=n8n\n\n# \u26a0\ufe0f Weak passwords\nN8N_BASIC_AUTH_PASSWORD=MyPassword123\n\n# Strong passwords\nN8N_BASIC_AUTH_PASSWORD=XK9$mP#2vN8qL@4wR\nN8N_BASIC_AUTH_PASSWORD=correct-horse-battery-staple-7829<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Generate strong password:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Linux\/Mac\nopenssl rand -base64 32\n\n# Output example:\n# 7vK9pL2mQ4xR8nT6wY3zC5vB1nM0qP9o<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">9. NODE_ENV &#8211; Production or Development Mode<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tells Node.js (which n8n runs on) whether this is production or development. Affects logging, error handling, and performance optimizations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Production deployment (recommended)\nNODE_ENV=production\n\n# Development\/testing\nNODE_ENV=development<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Differences:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>production<\/th><th>development<\/th><\/tr><\/thead><tbody><tr><td><strong>Error messages<\/strong><\/td><td>Generic<\/td><td>Detailed stack traces<\/td><\/tr><tr><td><strong>Logging<\/strong><\/td><td>Minimal<\/td><td>Verbose<\/td><\/tr><tr><td><strong>Performance<\/strong><\/td><td>Optimized<\/td><td>Slower (more checks)<\/td><\/tr><tr><td><strong>Caching<\/strong><\/td><td>Aggressive<\/td><td>Minimal<\/td><\/tr><tr><td><strong>Security<\/strong><\/td><td>Strict<\/td><td>Relaxed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to use each:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># On your VPS serving real workflows\nNODE_ENV=production\n\n# On your laptop testing new workflows\nNODE_ENV=development<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Most users should always use <code>production<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Database Configuration Variables<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">10. DB_TYPE &#8211; Which Database to Use<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Chooses between SQLite (simple) or PostgreSQL (powerful). SQLite breaks under high load. PostgreSQL scales to millions of workflows.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># SQLite (default) - good for small deployments\nDB_TYPE=sqlite\n\n# PostgreSQL - recommended for production\nDB_TYPE=postgresdb\n\n# MySQL\/MariaDB (also supported)\nDB_TYPE=mysqldb<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to use each:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Scenario<\/th><th>Recommended Database<\/th><\/tr><\/thead><tbody><tr><td>&lt; 50 workflows<\/td><td>SQLite<\/td><\/tr><tr><td>&lt; 10,000 executions\/day<\/td><td>SQLite<\/td><\/tr><tr><td>Single user<\/td><td>SQLite<\/td><\/tr><tr><td>100+ workflows<\/td><td>PostgreSQL<\/td><\/tr><tr><td>50,000+ executions\/day<\/td><td>PostgreSQL<\/td><\/tr><tr><td>Multiple users<\/td><td>PostgreSQL<\/td><\/tr><tr><td>Mission-critical<\/td><td>PostgreSQL<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SQLite configuration (simple):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DB_TYPE=sqlite\nDB_SQLITE_DATABASE=\/home\/node\/.n8n\/database.sqlite<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PostgreSQL configuration (complete example):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DB_TYPE=postgresdb\nDB_POSTGRESDB_HOST=localhost\nDB_POSTGRESDB_PORT=5432\nDB_POSTGRESDB_DATABASE=n8n\nDB_POSTGRESDB_USER=n8n\nDB_POSTGRESDB_PASSWORD=secure_db_password<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">11. DB_POSTGRESDB_- PostgreSQL Connection Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Configure connection to PostgreSQL database.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Full set of variables:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Required PostgreSQL settings\nDB_TYPE=postgresdb\nDB_POSTGRESDB_HOST=localhost           # Database server address\nDB_POSTGRESDB_PORT=5432               # PostgreSQL port (default 5432)\nDB_POSTGRESDB_DATABASE=n8n            # Database name\nDB_POSTGRESDB_USER=n8n                # Database username\nDB_POSTGRESDB_PASSWORD=your_password  # Database password\n\n# Optional PostgreSQL settings\nDB_POSTGRESDB_SCHEMA=public           # Database schema (default: public)\nDB_POSTGRESDB_SSL_CA=\/path\/to\/ca.crt  # SSL certificate (if required)\nDB_POSTGRESDB_SSL_CERT=\/path\/to\/cert.crt\nDB_POSTGRESDB_SSL_KEY=\/path\/to\/key.key\nDB_POSTGRESDB_SSL_REJECT_UNAUTHORIZED=true<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common configurations:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Local PostgreSQL (same VPS):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DB_POSTGRESDB_HOST=localhost\nDB_POSTGRESDB_PORT=5432<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Docker Compose setup (PostgreSQL + n8n):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>version: '3.8'\n\nservices:\n  postgres:\n    image: postgres:15-alpine\n    restart: unless-stopped\n    environment:\n      - POSTGRES_DB=n8n\n      - POSTGRES_USER=n8n\n      - POSTGRES_PASSWORD=n8n_password\n    volumes:\n      - postgres-data:\/var\/lib\/postgresql\/data\n\n  n8n:\n    image: n8nio\/n8n:latest\n    restart: unless-stopped\n    ports:\n      - \"5678:5678\"\n    environment:\n      - DB_TYPE=postgresdb\n      - DB_POSTGRESDB_HOST=postgres\n      - DB_POSTGRESDB_PORT=5432\n      - DB_POSTGRESDB_DATABASE=n8n\n      - DB_POSTGRESDB_USER=n8n\n      - DB_POSTGRESDB_PASSWORD=n8n_password\n    volumes:\n      - n8n-data:\/home\/node\/.n8n\n    depends_on:\n      - postgres\n\nvolumes:\n  postgres-data:\n  n8n-data:<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Execution &amp; Performance Variables<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">12. EXECUTIONS_PROCESS &#8211; How Workflows Execute<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Controls whether workflows run in main process or separate processes. Affects reliability and resource usage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Run in main process (simpler, recommended for small deployments)\nEXECUTIONS_PROCESS=main\n\n# Run in separate processes (more isolated, better for large deployments)\nEXECUTIONS_PROCESS=own<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Comparison:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Mode<\/th><th>Pros<\/th><th>Cons<\/th><th>Best For<\/th><\/tr><\/thead><tbody><tr><td><strong>main<\/strong><\/td><td>Simpler, lower overhead<\/td><td>One crash affects everything<\/td><td>&lt; 50 workflows<\/td><\/tr><tr><td><strong>own<\/strong><\/td><td>Isolation, crash protection<\/td><td>Higher memory usage<\/td><td>100+ workflows<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Most users should use <code>main<\/code>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">13. EXECUTIONS_TIMEOUT &#8211; Maximum Workflow Runtime<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kills workflows that run longer than specified time. Prevents infinite loops from consuming all resources. Format: Time in seconds<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Default: No timeout (not recommended)\n# EXECUTIONS_TIMEOUT not set\n\n# Recommended: 5 minutes for most workflows\nEXECUTIONS_TIMEOUT=300\n\n# For long-running workflows (data processing, API syncs)\nEXECUTIONS_TIMEOUT=1800  # 30 minutes\n\n# For simple workflows\nEXECUTIONS_TIMEOUT=60    # 1 minute<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example scenarios:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quick automation:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Form submission \u2192 email \u2192 Slack notification\nEXECUTIONS_TIMEOUT=60  # Should complete in seconds<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Data processing:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Process 10,000 database records\nEXECUTIONS_TIMEOUT=1800  # May take 20+ minutes<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If workflows time out frequently:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increase timeout<\/li>\n\n\n\n<li>Or optimize workflow (reduce API calls, add pagination)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">14. EXECUTIONS_DATA_SAVE_ON_ &#8211; Execution History<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Control what execution data gets saved to database. Saving everything uses lots of disk space. Saving nothing makes debugging impossible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Variables:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Save successful workflow executions\nEXECUTIONS_DATA_SAVE_ON_SUCCESS=all     # Save all data\nEXECUTIONS_DATA_SAVE_ON_SUCCESS=none    # Save nothing\n\n# Save failed workflow executions\nEXECUTIONS_DATA_SAVE_ON_ERROR=all       # Save all data (recommended)\nEXECUTIONS_DATA_SAVE_ON_ERROR=none      # Save nothing\n\n# Save manually triggered executions\nEXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true   # Save (recommended)\nEXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=false  # Don't save<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended configuration:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Keep errors for debugging, discard successful runs to save space\nEXECUTIONS_DATA_SAVE_ON_ERROR=all\nEXECUTIONS_DATA_SAVE_ON_SUCCESS=none\nEXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If disk space isn&#8217;t a concern:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Keep everything (useful for analytics)\nEXECUTIONS_DATA_SAVE_ON_ERROR=all\nEXECUTIONS_DATA_SAVE_ON_SUCCESS=all\nEXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">15. EXECUTIONS_DATA_MAX_AGE &#8211; How Long to Keep History<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Automatically deletes old execution data. Prevents database from growing infinitely. Format: Time in hours<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Keep execution history for 7 days\nEXECUTIONS_DATA_MAX_AGE=168\n\n# Keep for 30 days\nEXECUTIONS_DATA_MAX_AGE=720\n\n# Keep for 90 days\nEXECUTIONS_DATA_MAX_AGE=2160\n\n# Keep forever (not recommended)\n# EXECUTIONS_DATA_MAX_AGE not set<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended based on workflow volume:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Executions\/Day<\/th><th>Recommended Retention<\/th><\/tr><\/thead><tbody><tr><td>&lt; 100<\/td><td>30-90 days<\/td><\/tr><tr><td>100-1,000<\/td><td>14-30 days<\/td><\/tr><tr><td>1,000-10,000<\/td><td>7-14 days<\/td><\/tr><tr><td>10,000+<\/td><td>3-7 days<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Enable automatic pruning:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>EXECUTIONS_DATA_MAX_AGE=168            # Delete after 7 days\nEXECUTIONS_DATA_PRUNE=true             # Enable auto-deletion\nEXECUTIONS_DATA_PRUNE_TIMEOUT=3600     # Check every hour<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">16. N8N_CONCURRENCY_PRODUCTION_LIMIT &#8211; Parallel Executions<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Limits how many workflows can run simultaneously. Running too many parallel workflows crashes n8n on small VPS . Format: Number of workflows<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># VPS with 1GB RAM\nN8N_CONCURRENCY_PRODUCTION_LIMIT=5\n\n# VPS with 2GB RAM\nN8N_CONCURRENCY_PRODUCTION_LIMIT=10\n\n# VPS with 4GB+ RAM\nN8N_CONCURRENCY_PRODUCTION_LIMIT=20\n\n# Unlimited (dangerous on small VPS)\nN8N_CONCURRENCY_PRODUCTION_LIMIT=-1<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Security &amp; Advanced Variables<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">17. N8N_PAYLOAD_SIZE_MAX &#8211; Webhook Data Limit<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Limits maximum size of data sent to webhooks. Prevents attacks that send huge payloads to crash n8n. Format: Size in megabytes<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Default: 16MB (reasonable for most uses)\nN8N_PAYLOAD_SIZE_MAX=16\n\n# For large file uploads via webhooks\nN8N_PAYLOAD_SIZE_MAX=50\n\n# For small data only\nN8N_PAYLOAD_SIZE_MAX=5<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to increase:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Receiving large JSON payloads from APIs<\/li>\n\n\n\n<li>Handling file uploads via webhooks<\/li>\n\n\n\n<li>Processing base64-encoded images<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to decrease:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Only handling small form submissions<\/li>\n\n\n\n<li>Security-focused deployment<\/li>\n\n\n\n<li>Limited VPS resources<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">18. N8N_METRICS &#8211; Enable Prometheus Metrics<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Exposes metrics for monitoring with Prometheus\/Grafana. Essential for production monitoring and alerting.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Disable metrics (default)\nN8N_METRICS=false\n\n# Enable metrics endpoint\nN8N_METRICS=true\nN8N_METRICS_PORT=9100\n\n<strong>Once<\/strong> enabled, metrics available at:\nhttp:&#47;&#47;your-n8n-instance:9100\/metrics<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Metrics exposed:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Workflow execution count<\/li>\n\n\n\n<li>Execution duration<\/li>\n\n\n\n<li>Success\/failure rates<\/li>\n\n\n\n<li>Database query times<\/li>\n\n\n\n<li>Memory usage<\/li>\n\n\n\n<li>CPU usage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Useful for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Setting up automated alerts<\/li>\n\n\n\n<li>Tracking performance over time<\/li>\n\n\n\n<li>Identifying slow workflows<\/li>\n\n\n\n<li>Capacity planning<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">19. N8N_LOG_LEVEL &#8211; Logging Verbosity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Controls how detailed logs are. Too verbose fills disk; too quiet makes debugging impossible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Minimal logging (production)\nN8N_LOG_LEVEL=info\n\n# Detailed logging (troubleshooting)\nN8N_LOG_LEVEL=debug\n\n# Everything (development only)\nN8N_LOG_LEVEL=verbose\n\n# Errors only\nN8N_LOG_LEVEL=error\n\n# Silent (not recommended)\nN8N_LOG_LEVEL=silent<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended levels:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Situation<\/th><th>Level<\/th><th>Why<\/th><\/tr><\/thead><tbody><tr><td>Production<\/td><td><code>info<\/code><\/td><td>Balance detail vs disk usage<\/td><\/tr><tr><td>Debugging issues<\/td><td><code>debug<\/code><\/td><td>See detailed execution flow<\/td><\/tr><tr><td>Development<\/td><td><code>verbose<\/code><\/td><td>Everything for troubleshooting<\/td><\/tr><tr><td>Disk space critical<\/td><td><code>error<\/code><\/td><td>Only problems logged<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>View logs:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Docker\ndocker logs -f n8n\n\n# Docker Compose\ndocker-compose logs -f n8n\n\n# Filter for errors only\ndocker logs n8n <strong>2<\/strong>&gt;<strong>&amp;1<\/strong> | grep ERROR<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">20. N8N_USER_FOLDER &#8211; Custom Data Directory<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Changes where n8n stores workflows, credentials, and database. Useful for custom backup locations or separating data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Default:<\/strong> <code>\/home\/node\/.n8n<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Custom location:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>N8N_USER_FOLDER=\/data\/n8n-production\n\n# Or multiple instances\nN8N_USER_FOLDER=\/data\/n8n-staging<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Docker volume mapping required:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>services:\n  n8n:\n    environment:\n      - N8N_USER_FOLDER=\/data\/n8n-custom\n    volumes:\n      - \/path\/on\/host:\/data\/n8n-custom<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Use cases:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Running multiple n8n instances<\/li>\n\n\n\n<li>Storing data on specific disk partition<\/li>\n\n\n\n<li>Separating production and staging data<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Queue Mode Variables (Advanced Scaling)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">21. EXECUTIONS_MODE &#8211; Enable Queue Mode<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Switches from direct execution to queue-based processing. Enables horizontal scaling with multiple workers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Values:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Direct execution (default, simpler)\nEXECUTIONS_MODE=regular\n\n# Queue mode (scalable)\nEXECUTIONS_MODE=queue<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to use queue mode:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Processing 100,000+ executions per day<\/li>\n\n\n\n<li>Need to scale horizontally (multiple workers)<\/li>\n\n\n\n<li>Want execution resilience (workers can restart without losing jobs)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Requires Redis:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>EXECUTIONS_MODE=queue\nQUEUE_BULL_REDIS_HOST=localhost\nQUEUE_BULL_REDIS_PORT=6379\nQUEUE_BULL_REDIS_PASSWORD=redis_password  # if Redis has auth<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">22. QUEUE_BULL_REDIS_ &#8211; Redis Connection Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Configure connection to Redis (required for queue mode).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Full configuration:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>QUEUE_BULL_REDIS_HOST=localhost        # Redis server address\nQUEUE_BULL_REDIS_PORT=6379            # Redis port (default 6379)\nQUEUE_BULL_REDIS_DB=0                 # Redis database number\nQUEUE_BULL_REDIS_PASSWORD=password    # Redis password (if set)\nQUEUE_BULL_REDIS_TIMEOUT_THRESHOLD=10000  # Connection timeout (ms)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Docker Compose with Redis:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>version: '3.8'\n\nservices:\n  redis:\n    image: redis:7-alpine\n    restart: unless-stopped\n    command: redis-server --requirepass your_redis_password\n    volumes:\n      - redis-data:\/data\n\n  n8n-main:\n    image: n8nio\/n8n:latest\n    restart: unless-stopped\n    ports:\n      - \"5678:5678\"\n    environment:\n      - EXECUTIONS_MODE=queue\n      - QUEUE_BULL_REDIS_HOST=redis\n      - QUEUE_BULL_REDIS_PORT=6379\n      - QUEUE_BULL_REDIS_PASSWORD=your_redis_password\n    volumes:\n      - n8n-data:\/home\/node\/.n8n\n\n  n8n-worker:\n    image: n8nio\/n8n:latest\n    restart: unless-stopped\n    command: worker\n    environment:\n      - EXECUTIONS_MODE=queue\n      - QUEUE_BULL_REDIS_HOST=redis\n      - QUEUE_BULL_REDIS_PORT=6379\n      - QUEUE_BULL_REDIS_PASSWORD=your_redis_password\n    volumes:\n      - n8n-data:\/home\/node\/.n8n\n\nvolumes:\n  redis-data:\n  n8n-data:<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Workflows queued in Redis, executed by worker processes. Scale by adding more workers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Complete Production-Ready Configuration Example<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s a docker-compose.yml with proper environment variables:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>version: '3.8'\n\nservices:\n  postgres:\n    image: postgres:15-alpine\n    restart: unless-stopped\n    environment:\n      - POSTGRES_DB=n8n\n      - POSTGRES_USER=n8n\n      - POSTGRES_PASSWORD=secure_db_password_here\n    volumes:\n      - postgres-data:\/var\/lib\/postgresql\/data\n    healthcheck:\n      test: &#91;\"CMD-SHELL\", \"pg_isready -U n8n\"]\n      interval: 10s\n      timeout: 5s\n      retries: 5\n\n  n8n:\n    image: n8nio\/n8n:latest\n    restart: unless-stopped\n    ports:\n      - \"5678:5678\"\n    \n    environment:\n      # Basic Configuration\n      - N8N_HOST=n8n.yourdomain.com\n      - N8N_PORT=5678\n      - N8N_PROTOCOL=https\n      - NODE_ENV=production\n      - WEBHOOK_URL=https:\/\/n8n.yourdomain.com\/\n      \n      # Timezone\n      - GENERIC_TIMEZONE=America\/New_York\n      \n      # Security\n      - N8N_BASIC_AUTH_ACTIVE=true\n      - N8N_BASIC_AUTH_USER=admin_username\n      - N8N_BASIC_AUTH_PASSWORD=super_secure_password_here\n      \n      # Database (PostgreSQL)\n      - DB_TYPE=postgresdb\n      - DB_POSTGRESDB_HOST=postgres\n      - DB_POSTGRESDB_PORT=5432\n      - DB_POSTGRESDB_DATABASE=n8n\n      - DB_POSTGRESDB_USER=n8n\n      - DB_POSTGRESDB_PASSWORD=secure_db_password_here\n      \n      # Execution Settings\n      - EXECUTIONS_PROCESS=main\n      - EXECUTIONS_TIMEOUT=300\n      - EXECUTIONS_DATA_SAVE_ON_SUCCESS=none\n      - EXECUTIONS_DATA_SAVE_ON_ERROR=all\n      - EXECUTIONS_DATA_SAVE_MANUAL_EXECUTIONS=true\n      - EXECUTIONS_DATA_MAX_AGE=168\n      - EXECUTIONS_DATA_PRUNE=true\n      \n      # Performance\n      - N8N_CONCURRENCY_PRODUCTION_LIMIT=10\n      - N8N_PAYLOAD_SIZE_MAX=16\n      \n      # Logging\n      - N8N_LOG_LEVEL=info\n      \n    volumes:\n      - n8n-data:\/home\/node\/.n8n\n      - .\/backups:\/backups\n    \n    depends_on:\n      postgres:\n        condition: service_healthy\n    \n    # Resource limits (adjust based on VPS)\n    deploy:\n      resources:\n        limits:\n          cpus: '2'\n          memory: 2G\n        reservations:\n          memory: 1G\n\nvolumes:\n  postgres-data:\n  n8n-data:<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>This configuration:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> Uses PostgreSQL (not SQLite)<\/li>\n\n\n\n<li> Enables authentication<\/li>\n\n\n\n<li> Sets correct timezone<\/li>\n\n\n\n<li> Configures HTTPS webhooks<\/li>\n\n\n\n<li> Manages execution history<\/li>\n\n\n\n<li> Limits concurrent executions<\/li>\n\n\n\n<li> Production logging level<\/li>\n\n\n\n<li> Auto-restart on failure<\/li>\n\n\n\n<li> Health checks for database<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Replace these values:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>n8n.yourdomain.com<\/code> \u2192 Your actual domain<\/li>\n\n\n\n<li><code>admin_username<\/code> \u2192 Your chosen username<\/li>\n\n\n\n<li><code>super_secure_password_here<\/code> \u2192 Strong password (use <code>openssl rand -base64 32<\/code>)<\/li>\n\n\n\n<li><code>secure_db_password_here<\/code> \u2192 Database password<\/li>\n\n\n\n<li><code>America\/New_York<\/code> \u2192 Your timezone<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Environment Variables Quick Reference Table<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Variable<\/th><th>Purpose<\/th><th>Common Value<\/th><th>Required?<\/th><\/tr><\/thead><tbody><tr><td><code>N8N_HOST<\/code><\/td><td>Your domain\/IP<\/td><td><code>n8n.yourdomain.com<\/code><\/td><td>Yes<\/td><\/tr><tr><td><code>N8N_PORT<\/code><\/td><td>Port n8n runs on<\/td><td><code>5678<\/code><\/td><td>Yes<\/td><\/tr><tr><td><code>N8N_PROTOCOL<\/code><\/td><td>HTTP or HTTPS<\/td><td><code>https<\/code><\/td><td>Yes<\/td><\/tr><tr><td><code>WEBHOOK_URL<\/code><\/td><td>Custom webhook base<\/td><td>Usually auto-generated<\/td><td>No<\/td><\/tr><tr><td><code>GENERIC_TIMEZONE<\/code><\/td><td>Timezone<\/td><td><code>America\/New_York<\/code><\/td><td><strong>Yes<\/strong><\/td><\/tr><tr><td><code>N8N_BASIC_AUTH_ACTIVE<\/code><\/td><td>Enable auth<\/td><td><code>true<\/code><\/td><td><strong>Yes<\/strong><\/td><\/tr><tr><td><code>N8N_BASIC_AUTH_USER<\/code><\/td><td>Username<\/td><td>Your choice<\/td><td><strong>Yes<\/strong><\/td><\/tr><tr><td><code>N8N_BASIC_AUTH_PASSWORD<\/code><\/td><td>Password<\/td><td>Strong password<\/td><td><strong>Yes<\/strong><\/td><\/tr><tr><td><code>NODE_ENV<\/code><\/td><td>Environment mode<\/td><td><code>production<\/code><\/td><td>Yes<\/td><\/tr><tr><td><code>DB_TYPE<\/code><\/td><td>Database type<\/td><td><code>postgresdb<\/code><\/td><td>Yes<\/td><\/tr><tr><td><code>DB_POSTGRESDB_HOST<\/code><\/td><td>DB server<\/td><td><code>localhost<\/code><\/td><td>If PostgreSQL<\/td><\/tr><tr><td><code>DB_POSTGRESDB_DATABASE<\/code><\/td><td>DB name<\/td><td><code>n8n<\/code><\/td><td>If PostgreSQL<\/td><\/tr><tr><td><code>EXECUTIONS_TIMEOUT<\/code><\/td><td>Max runtime (seconds)<\/td><td><code>300<\/code><\/td><td>Recommended<\/td><\/tr><tr><td><code>EXECUTIONS_DATA_MAX_AGE<\/code><\/td><td>Keep history (hours)<\/td><td><code>168<\/code><\/td><td>Recommended<\/td><\/tr><tr><td><code>N8N_CONCURRENCY_PRODUCTION_LIMIT<\/code><\/td><td>Parallel workflows<\/td><td><code>5-10<\/code><\/td><td>Recommended<\/td><\/tr><tr><td><code>N8N_LOG_LEVEL<\/code><\/td><td>Logging detail<\/td><td><code>info<\/code><\/td><td>Optional<\/td><\/tr><tr><td><code>EXECUTIONS_MODE<\/code><\/td><td>Regular or queue<\/td><td><code>regular<\/code><\/td><td>Optional<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Common Environment Variable Mistakes &amp; Fixes<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Mistake 1: Forgetting to Set Timezone<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptom:<\/strong> Scheduled workflows run at wrong time.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># No timezone set (defaults to UTC)\n# Scheduled for 9 AM \u2192 runs at 9 AM UTC\n\n#  Timezone explicitly set\nGENERIC_TIMEZONE=America\/New_York\n# Scheduled for 9 AM \u2192 runs at 9 AM EST<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Mistake 2: Disabling Authentication in Production<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptom:<\/strong> Anyone can access your n8n instance.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#  DANGEROUS - publicly accessible\nN8N_BASIC_AUTH_ACTIVE=false\n\n# SECURE - authentication required\nN8N_BASIC_AUTH_ACTIVE=true\nN8N_BASIC_AUTH_USER=admin\nN8N_BASIC_AUTH_PASSWORD=strong_password<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Mistake 3: Protocol Mismatch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptom:<\/strong> Webhooks don&#8217;t work, browser shows security warnings.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#  Says HTTPS but no SSL certificate\nN8N_PROTOCOL=https\n# Result: \"Your connection is not private\"\n\n#  Match actual setup\n# If no SSL yet:\nN8N_PROTOCOL=http\n\n# After setting up Let's Encrypt:\nN8N_PROTOCOL=https<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Mistake 4: Wrong PostgreSQL Host<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptom:<\/strong> n8n fails to start with &#8220;connection refused&#8221; error.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#  Wrong when using Docker Compose\nDB_POSTGRESDB_HOST=localhost\n\n#  Correct - use service name\nDB_POSTGRESDB_HOST=postgres<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Docker Compose creates a network where services communicate by name, not &#8220;localhost&#8221;.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Mistake 5: Not Setting Execution Limits<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Symptom:<\/strong> n8n crashes on small VPS under load.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Unlimited concurrent executions\n# N8N_CONCURRENCY_PRODUCTION_LIMIT not set\n\n#  Limited based on VPS resources\nN8N_CONCURRENCY_PRODUCTION_LIMIT=5  # For 1GB RAM VPS<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to Update Environment Variables<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Method 1: Edit docker-compose.yml<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Edit the file:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano docker-compose.yml<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Change the variable:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>environment:\n  - GENERIC_TIMEZONE=America\/Los_Angeles  # Changed from New_York<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Restart n8n:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker-compose down\ndocker-compose up -d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Changes take effect immediately.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 2: Using .env File<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Create\/edit .env file:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano .env<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Add variables:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>N8N_HOST=n8n.yourdomain.com\nGENERIC_TIMEZONE=America\/New_York\nDB_PASSWORD=secure_password<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Reference in docker-compose.yml:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>environment:\n  - N8N_HOST=${N8N_HOST}\n  - GENERIC_TIMEZONE=${GENERIC_TIMEZONE}\n  - DB_POSTGRESDB_PASSWORD=${DB_PASSWORD}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Restart:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker-compose down\ndocker-compose up -d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Benefit:<\/strong> Sensitive values (passwords) separate from main config file.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 3: Environment Variables in Docker Command<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For quick testing:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker run -d \\\n  -p 5678:5678 \\\n  -e N8N_HOST=n8n.yourdomain.com \\\n  -e N8N_PROTOCOL=https \\\n  -e GENERIC_TIMEZONE=America\/New_York \\\n  -v n8n-data:\/home\/node\/.n8n \\\n  n8nio\/n8n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Not recommended for production (hard to manage, easy to forget what you set).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Debugging Environment Variable Issues<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Check What Variables Are Actually Set<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">View all environment variables inside running container:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker exec n8n env | grep N8N\n\nExample output:\n\nN8N_HOST=n8n.yourdomain.com\nN8N_PORT=5678\nN8N_PROTOCOL=https\nN8N_BASIC_AUTH_ACTIVE=true<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If a variable doesn&#8217;t appear, it wasn&#8217;t set correctly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Check n8n Startup Logs<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>View logs for configuration errors:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker logs n8n | head -50\n\nLook for:\n\nUserSettings were generated and saved\nServer is now listening on: 0.0.0.0:5678\nVersion: 1.x.x\n\nOr errors like:\n\nError: Cannot connect to database\nError: Invalid timezone specified<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Test Specific Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Test webhook URL generation:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Create workflow with webhook trigger<\/li>\n\n\n\n<li>Check webhook URL in node settings<\/li>\n\n\n\n<li>Should show: <code>https:\/\/n8n.yourdomain.com\/webhook\/...<\/code><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If shows <code>http:\/\/undefined\/webhook\/...<\/code>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>N8N_HOST<\/code> not set<\/li>\n\n\n\n<li><code>N8N_PROTOCOL<\/code> not set<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Test timezone:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Create schedule trigger for &#8220;tomorrow at 9 AM&#8221;<\/li>\n\n\n\n<li>Check workflow execution list<\/li>\n\n\n\n<li>Time shown should match your local time, not UTC<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables are the backbone of any self-hosted n8n setup. They give you full control over how your automation system runs without touching the core application.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you understand how to use them, everything becomes easier:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You can switch from testing to production smoothly<\/li>\n\n\n\n<li>You can secure your instance properly<\/li>\n\n\n\n<li>You can connect domains, databases, and external services without confusion<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Start your properly configured n8n instance today with Ucartz <a href=\"https:\/\/www.ucartz.com\/vps-hosting\">KVM VPS hosting<\/a>. $10\/month. Production-ready. Environment variables explained. Stop fighting configuration issues. Start building workflows that actually work.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQ <\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. What are environment variables in n8n?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Environment variables are configuration settings used to control how n8n runs. They define things like port, domain, authentication, and database connections without modifying the application code.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6. Do I need all environment variables to run n8n?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No. You only need a few basic variables to start. Advanced variables are used for production setups like databases, scaling, and security.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7. Can I change environment variables after installation?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Update the values and restart your Docker container:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">docker-compose down<br>docker-compose up -d<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Environment variables are simple settings that control how your application behaves without changing its core code. In n8n workflow automation , they act as the control panel that defines how your automation system runs, connects, and secures itself. When you install n8n on a VPS using Docker, you don\u2019t hardcode things like your domain, port, [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":2912,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[712],"tags":[754,525,74],"class_list":["post-2910","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-n8n","tag-environment-variables","tag-n8n","tag-vps-hosting"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Use n8n Environment Variables: Best Practices &amp; Tips - Web Hosting and IT Consultancy Services<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ucartz.com\/blog\/how-to-use-n8n-environment-variables-best-practices-tips\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Use n8n Environment Variables: Best Practices &amp; Tips - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"Environment variables are simple settings that control how your application behaves without changing its core code. 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