How to Run a Go Program as a Daemon in Ubuntu?

Starting a Go Program as a Daemon in Ubuntu

When running a Go application as a daemon in Ubuntu, several approaches and considerations are important.

Using Go Build

Rather than running your program directly with go run, it's recommended to build an executable using go build. This creates a binary file that can be managed more effectively as a daemon.

Daemonize

External tools like daemonize offer a versatile option for running Go programs as daemons. Daemonize provides dedicated functionality for this purpose, handling essential daemon preparations and ensuring proper behavior.

Example Daemonization

To start your Go daemon using daemonize, execute the following command:

daemonize -p /var/run/myapp.pid -l /var/lock/subsys/myapp -u nobody /path/to/myapp.exe

This command will:

• Set the process ID to /var/run/myapp.pid
• Acquire a lock for /var/lock/subsys/myapp
• Run the daemon under the user "nobody"
• Execute the executable at /path/to/myapp.exe

Additional Considerations

• Upstart Script: You can also write an Upstart script to run your program as a daemon. However, this option is more system-specific than using daemonize.
• Signal Handling: Ensure that your Go program handles signals like SIGHUP and SIGTERM gracefully to handle stop and restart operations correctly.
• Logging: Redirect application logging to a file or service to avoid losing messages in case of daemon failures.

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