Alter memory allocation pool for Kafka and ZooKeeper.
Disable GC Logging for Kafka and bundled ZooKeeper.
Log systemd service state changes using rsyslog.
Use systemctl to get process identifier for specified service.
Manage systemd services remotely over SSH protocol.
Monitor file system events to restart service on every configuration change.
Use varnishlog to log specific Varnish requests.
Varnish Shared memory Log can put a major strain on the disk (I/O write operations). The solution is to store it on the virtual memory filesystem.