Difference between revisions of "Devnodes"
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= Exporting devices through devnodes = | = Exporting devices through devnodes = | ||
| − | You can export devices from the Hardware Node (HN) to the container (CT) by using the devnodes flag: | + | You can export devices from the Hardware Node (HN) to the container (CT) by using the devnodes flag, here for example for a serial port adaptor (/dev/ttyUSB0): |
<pre> | <pre> | ||
$ vzctl set 1024 --devnodes ttyUSB0:rw --save | $ vzctl set 1024 --devnodes ttyUSB0:rw --save | ||
</pre> | </pre> | ||
| + | |||
| + | <pre> | ||
| + | # vzctl enter 1024 | ||
| + | entered into CT 1024 | ||
| + | root@1024 / [1]# screen /dev/ttyUSB0 57600 8N1 | ||
| + | [detached from 17017.pts-0.1024] | ||
| + | root@1024 / [2]# ls -al /dev/ttyUSB0 | ||
| + | crw-r----- 1 root root 188, 0 Apr 17 15:36 /dev/ttyUSB0 | ||
| + | </pre> | ||
| + | |||
| + | If you remove suddenly the device, vzctl will complain and continue: | ||
| + | |||
| + | <pre> | ||
| + | # vzctl enter 1024 | ||
| + | Incorrect device name /dev/ttyUSB0: No such file or directory | ||
| + | Invalid value for DEVNODES=ttyUSB0:rw, skipped | ||
| + | entered into CT 1024 | ||
| + | root@1024 / [1]# | ||
| + | </pre> | ||
| + | |||
| + | Inside the container, you can set a different owner than root, thereby regulating internal access privileges possibly differently from the host system. | ||
| + | |||
| + | = List of successfull exported devices = | ||
| + | |||
| + | * /dev/ttyUSB0 | ||
| + | * /dev/i2c-* (tested through i2c-parport) | ||
| + | * /dev/net/tun | ||
| + | |||
| + | [[Category:HOWTO]] | ||
Latest revision as of 06:31, 7 June 2015
Exporting devices through devnodes[edit]
You can export devices from the Hardware Node (HN) to the container (CT) by using the devnodes flag, here for example for a serial port adaptor (/dev/ttyUSB0):
$ vzctl set 1024 --devnodes ttyUSB0:rw --save
# vzctl enter 1024 entered into CT 1024 root@1024 / [1]# screen /dev/ttyUSB0 57600 8N1 [detached from 17017.pts-0.1024] root@1024 / [2]# ls -al /dev/ttyUSB0 crw-r----- 1 root root 188, 0 Apr 17 15:36 /dev/ttyUSB0
If you remove suddenly the device, vzctl will complain and continue:
# vzctl enter 1024 Incorrect device name /dev/ttyUSB0: No such file or directory Invalid value for DEVNODES=ttyUSB0:rw, skipped entered into CT 1024 root@1024 / [1]#
Inside the container, you can set a different owner than root, thereby regulating internal access privileges possibly differently from the host system.
List of successfull exported devices[edit]
- /dev/ttyUSB0
- /dev/i2c-* (tested through i2c-parport)
- /dev/net/tun
