Systemd KillMode=none

This document (000020394) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15

Situation

Systemd service units can be configured with KillMode=none. However when this option is used, processes belonging to the unit are not forced to terminate when the service stops. This increases the risk of misbehavior because processes might stay up even if their services assumed to be stopped and expected not to consume any resources. For this reason this option is deprecated.

SUSE generally recommends to not use KillMode=none but some applications have additional internal consistency mechanisms which help to mitigate negative side effects. These applications can continue to use the KillMode=none configuration option (nevertheless it is recommended to rework these applications so they don't rely on anymore).

Resolution

Applications should not rely on a sane automatic stop during the operating system shutdown but should be stopped explicitly before shutting down the OS.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

Document ID:000020394
Creation Date: 23-Sep-2021
Modified Date:30-Sep-2021
- SUSE Linux Enterprise Server
- SUSE Linux Enterprise Server for SAP Applications

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