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Merge pull request #367 from kolyshkin/ipcmode

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Introduce/document new IPC modes
This commit is contained in:
Vincent Demeester
2017-08-25 09:48:00 +02:00
committed by GitHub
parent 1086e84718 9285db6752
commit 8ebc03a71f
5 changed files with 26 additions and 26 deletions
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docs/reference/run.md
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@@ -265,11 +265,21 @@ more advanced use case would be changing the host's hostname from a container.
## IPC settings (--ipc)
--ipc="" : Set the IPC mode for the container,
'container:<name|id>': reuses another container's IPC namespace
'host': use the host's IPC namespace inside the container
--ipc="MODE" : Set the IPC mode for the container
By default, all containers have the IPC namespace enabled.
The following values are accepted:
| Value | Description |
|:---------------------------|:----------------------------------------------------------------------------------|
| "" | Use daemon's default. |
| "none" | Own private IPC namespace, with /dev/shm not mounted. |
| "private" | Own private IPC namespace. |
| "shareable" | Own private IPC namespace, with a possibility to share it with other containers. |
| "container:<_name-or-ID_>" | Join another ("shareable") container's IPC namespace. |
| "host" | Use the host system's IPC namespace. |
If not specified, daemon default is used, which can either be `"private"`
or `"shareable"`, depending on the daemon version and configration.
IPC (POSIX/SysV IPC) namespace provides separation of named shared memory
segments, semaphores and message queues.
@@ -280,7 +290,8 @@ memory is commonly used by databases and custom-built (typically C/OpenMPI,
C++/using boost libraries) high performance applications for scientific
computing and financial services industries. If these types of applications
are broken into multiple containers, you might need to share the IPC mechanisms
of the containers.
of the containers, using `"shareable"` mode for the main (i.e. "donor")
container, and `"container:<donor-name-or-ID>"` for other containers.
## Network settings