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Add support for mount in runtime config

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This could be used in LinuxKit now, as there are some examples, eg
https://github.com/linuxkit/linuxkit/blob/master/blueprints/docker-for-mac/base.yml#L33
which are creating containers to do a mount.

The main reason though is to in future change the ad hoc code that generates
overlay mounts for writeable containers with a runtime config which does
the same thing; this code needs to create both tmpfs and overlay mounts.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This commit is contained in:
Justin Cormack
2017-08-22 15:00:18 +01:00
parent 0d58d332be
commit ee0901762f
3 changed files with 7 additions and 4 deletions
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docs/yaml.md
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@@ -183,6 +183,8 @@ permissions issues in use.
In addition to the parts of the specification above used to generate the OCI spec, there is a `runtime` section in the image specification
which specifies some actions to take place when the container is being started.
- `mounts` takes a list of mount specifications (`source`, `destination`, `type`, `options`) and mounts them in the root namespace before the container is created. It will
try to make any missing destination directories.
- `mkdir` takes a list of directories to create at runtime, in the root mount namespace. These are created before the container is started, so they can be used to create
directories for bind mounts, for example in `/tmp` or `/run` which would otherwise be empty.
- `interface` defines a list of actions to perform on a network interface: