github/linuxkit
1
0
Fork 0
mirror of https://github.com/linuxkit/linuxkit.git synced 2025-09-04 08:26:42 +00:00
Code Issues Projects Releases Wiki Activity

Support multiple disks in qemu

Browse Source 
This changes the CLI specification for disks, as it needs to be able to
be repeated.

```
linuxkit run qemu -disk name,size=1G,format=qcow2 ...
```

Options may be omitted.

Currently other local backends may not support multiple disks, but this
can be added in future. Code for cloud backends has not changed as the
disk support is specific to the platform.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This commit is contained in:
Justin Cormack
2017-05-31 17:20:10 +01:00
parent b822bff6ad
commit 25a1e12cf3
7 changed files with 166 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
docs/external-disk.md
View File

@@ -7,14 +7,15 @@
## Make Disk Available
In order to make the disk available, you need to tell `linuxkit` where the disk file or block device is.
All local `linuxkit run` methods (currently `hyperkit`, `qemu`, and `vmware`) take two arguments:
All local `linuxkit run` methods (currently `hyperkit`, `qemu`, and `vmware`) take a `-disk` argument:
* `-disk-size <size>`: size of disk. The default is in MB but a `G` can be appended to specify the size in GB, e.g. `-disk-size 4096` or `disk-size 4G` will provide a 4GB disk.
* `-disk <path>`: use the disk at location _path_, e.g. `-disk foo.img` will use the disk at `$PWD/foo.img`
* `-disk path,size=100M,format=qcow2`. For size the default is in MB but `G` can be aspecified for GB. The format can be omitted for the platform default, and is only useful on `qemu` at present.
If you do not provide `-disk `_path_, `linuxkit` assumes a default, which is _prefix_`-state/disk.img` for `hyperkit` and `vmware` and _prefix_`-disk.img` for `qemu`.
If the _path` is specified it will use the disk at location _path_, if you do not provide `-disk `_path_, `linuxkit` assumes a default, which is _prefix_`-state/disk.img` for `hyperkit` and `vmware` and _prefix_`-disk.img` for `qemu`.
If the disk at `<path>`, or the default if `-disk` option is not provided, does not exist, `linuxkit` will create one of size `<size>`.
If the disk at the specified or default `<path>` does not exist, `linuxkit` will create one of size `<size>`.
The `-disk` specification may be repeated for multiple disks, although a limited number may be supported, and some platforms currently only support a single disk.
**TODO:** GCP