Troubleshoot Telegraf Controller installation

Resolve common installation and startup issues with Telegraf Controller. Check the symptoms below and apply the recommended fix before continuing with configuration.

• Port Already in Use
• Permission Denied (Linux/macOS)
• Database Connection Issues
• Firewall Configuration
• Security Considerations

Port already in use

If the default ports (8888 and 8000) are already in use, use the following configuration options to specify alternative ports:

For more information, see the General section of the configuration options reference.

APP_PORT=3000
HEARTBEAT_PORT=3001

telegraf_controller

$env:APP_PORT=3000
$env:HEARTBEAT_PORT=3001

./telegraf_controller.exe

telegraf_controller --port=3000 --heartbeat-port=3001

./telegraf_controller.exe --port=3000 --heartbeat-port=3001

Permission denied (Linux/macOS)

If you do not have permission to run the telegraf_controller executable, ensure the file has executable permissions:

chmod +x telegraf_controller

macOS: Remove the quarantine attribute

macOS places a quarantine attribute on executable files downloaded from a browser and restricts file execution. To remove the quarantine attribute, use Terminal or System Settings.

Remove the quarantine attribute in Terminal

xattr -d com.apple.quarantine telegraf_controller

Remove the quarantine attribute in System Settings

1. Attempt to run the telegraf_controller executable.
2. In macOS, navigate to System Settings > Privacy & Security.
3. Scroll to the bottom of the window.
4. Next to the message about Telegraf Controller, click Allow.

Database connection issues

If there are database connection issues, check the following depending on which database you’re using:

SQLite

• Check file permissions for SQLite database directory

PostgreSQL

• Ensure PostgreSQL is running
• Check the format of and credentials in your data source name (DSN or database URL)
• Verify network connectivity

Firewall configuration

Ensure the following ports are open in your network Firewall configuration:

• Web Interface and API: TCP 8888 (or custom port)
• Web Interface (separate port): the ui-port value, if configured
• Heartbeat server: TCP 8000 (or custom heartbeat port)

Security considerations

• SSL/TLS: Set the SSL_CERT_PATH and SSL_KEY_PATH environment variables for production deployments. If agents log x509: certificate signed by unknown authority, they do not trust the certificate. See Secure Telegraf Controller with TLS.
• Firewall: Restrict access to the web interface and heartbeat ports
• Database Security:
  • PostgreSQL: Use strong passwords
  • SQLite: Ensure the database file is protected with restricted permissions (chmod 600)