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[19.03] Update compose-file reference for sysctls #8481

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usha-mandya merged 1 commit into from
Sep 23, 2019
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[19.03] Update compose-file reference for sysctls #8481

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8 changes: 6 additions & 2 deletions compose/compose-file/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -931,7 +931,6 @@ The following sub-options (supported for `docker-compose up` and `docker-compose
- [network_mode](#network_mode)
- [restart](#restart)
- [security_opt](#security_opt)
- [sysctls](#sysctls)
- [userns_mode](#userns_mode)

>**Tip:** See the section on [how to configure volumes
Expand Down Expand Up @@ -1730,7 +1729,12 @@ sysctls:
- net.ipv4.tcp_syncookies=0
```

> **Note**: This option is ignored when
You can only use sysctls that are namespaced in the kernel. Docker does not
support changing sysctls inside a container that also modify the host system.
For an overview of supported sysctls, refer to [configure namespaced kernel
parameters (sysctls) at runtime](/engine/reference/commandline/run/#configure-namespaced-kernel-parameters-sysctls-at-runtime).

> This option requires Docker Engine 19.03 or up when
> [deploying a stack in swarm mode](/engine/reference/commandline/stack_deploy.md)
> with a (version 3) Compose file.

Expand Down