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config-linux: Specify host mount namespace for namespace paths #275

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Mar 16, 2016
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config-linux: Specify host mount namespace for namespace paths #275

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2 changes: 1 addition & 1 deletion config-linux.md
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Expand Up @@ -34,7 +34,7 @@ The following parameters can be specified to setup namespaces:
* **`uts`** the container will be able to have its own hostname and domain name
* **`user`** the container will be able to remap user and group IDs from the host to local users and groups within the container

* **`path`** *(string, optional)* - path to namespace file
* **`path`** *(string, optional)* - path to namespace file in the [runtime mount namespace](glossary.md#runtime-namespace)

If a path is specified, that particular file is used to join that type of namespace.
Also, when a path is specified, a runtime MUST assume that the setup for that particular namespace has already been done and error out if the config specifies anything else related to that namespace.
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10 changes: 10 additions & 0 deletions glossary.md
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Expand Up @@ -13,6 +13,10 @@ The [`config.json`](config.md) file in a [bundle](#bundle) which defines the int
An environment for executing processes with configurable isolation and resource limitations.
For example, namespaces, resource limits, and mounts are all part of the container environment.

## Container namespace

On Linux, a leaf in the [namespace][namespaces.7] hierarchy in which the [configured process](config.md#process-configuration) executes.

## JSON

All configuration [JSON][] MUST be encoded in [UTF-8][].
Expand All @@ -22,5 +26,11 @@ All configuration [JSON][] MUST be encoded in [UTF-8][].
An implementation of this specification.
It reads the [configuration files](#configuration) from a [bundle](#bundle), uses that information to create a [container](#container), launches a process inside the container, and performs other [lifecycle actions](runtime.md).

## Runtime namespace

On Linux, a leaf in the [namespace][namespaces.7] hierarchy from which the [runtime](#runtime) process is executed.
New container namespaces will be created as children of the runtime namespaces.

[JSON]: http://json.org/
[UTF-8]: http://www.unicode.org/versions/Unicode8.0.0/ch03.pdf
[namespaces.7]: http://man7.org/linux/man-pages/man7/namespaces.7.html