systemd supervises CLI workers, restarts failures and sends stop signals.
What It Does and When to Use It
Run the relevant deployment or container command in the intended trusted environment. A producer publishes work, a consumer executes it, and the broker or scheduler controls delivery and retries.
Requirements, Inputs and Expected Behavior
Confirm the runtime, extension, environment variables, and permissions before running the examples in production. Restart policies need rate limits to avoid crash loops and must allow graceful shutdown.
Example 1: Basic Operation
Run the relevant deployment or container command in the intended trusted environment.
sudo systemctl status php-job-worker --no-pagerExample 2: Behavior and Validation
Confirm PHP version, extensions and INI paths in the target runtime.
php -v
php -m | grep -E 'pdo|openssl|mbstring'
php --iniPractical Example: Application Use
Check actual service health and log output; adapt host and service names to deployment.
curl -fsS http://127.0.0.1/health || exit 1
sudo journalctl -n 30 --no-pagerImportant Behavior and Edge Cases
The second example highlights: Confirm PHP version, extensions and INI paths in the target runtime. The practical example adds: Check actual service health and log output; adapt host and service names to deployment.
Comparison with Related Approaches
| Approach | What changes |
|---|---|
| Producer, consumer and scheduler | A producer publishes work, a consumer executes it, and the broker or scheduler controls delivery and retries. |
| Choosing safely | Acknowledge completed work and use idempotency to make retries safe. |
Common Beginner Mistakes
| Mistake | Correct approach |
|---|---|
| Acknowledging a job before it finishes | Mark delivery successful only after durable processing succeeds. |
| Treating retries as harmless | Use idempotency keys and a bounded retry policy with dead-letter handling. |
| Skipping operational constraints | Restart policies need rate limits to avoid crash loops and must allow graceful shutdown. |
Key Takeaways
- systemd supervises CLI workers, restarts failures and sends stop signals.
- Check actual service health and log output; adapt host and service names to deployment.
- Acknowledge completed work and use idempotency to make retries safe.