ubuntu - Can docker write to a cd? -


can docker write cd? can docker execute

cdrecord dev=/dev/sr0 -checkdrive

from ubuntu container?

docker seems able use parent's network hardware, why can't use parents cdrom/dvd device?

update:

this question programming in have shell script run on ubuntu vm , want know if feasible migrate docker. apologize not pointing out :)

i suppose (not tested yet), can find example in docker run script:

docker run \ -t --rm \ --privileged \ -v $xsock:$xsock \ -v /etc/localtime:/etc/localtime:ro \ -v /dev/sr0:/dev/sr0 \ -v /dev/cdrom:/dev/cdrom \ -v $rips:/rips \ --name handbrake marvambass/handbrake &

as mentioned in comments luca, --privileged flag required (docker run):

by default, potentially dangerous kernel capabilities dropped; including cap_sys_admin (which required mount filesystems). however, --privileged flag allow run.

the --privileged flag gives all capabilities container, , lifts limitations enforced device cgroup controller.
in other words, container can host can do.
flag exists allow special use-cases, running docker within docker.

as vincent demeester mentions in comments, there --device option:

it necessary directly expose devices container. --device option enables that.
example, specific block storage device or loop device or audio device can added otherwise unprivileged container (without --privileged flag) , have application directly access it.

by default, container able read, write , mknod these devices. can overridden using third :rwm set of options each --device flag

note: --device cannot safely used ephemeral devices. block devices may removed should not added untrusted containers --device.

as seen in issue 10637, devices can change node names. see issue 8826

if launch docker daemon lxc backend, should able use --lxc-conf=lxc.cgroup.devices.allow = c 189:* rwm allow container access devices of group, , use volume -v /dev/bus/usb/:/dev/bus/usb/ access all usb devices.


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