Sergiusz Urbaniak 4f086aab52 nspawn: R/W support for /sys, and /proc/sys
This commit adds the possibility to leave /sys, and /proc/sys read-write.
It introduces a new (undocumented) env var SYSTEMD_NSPAWN_API_VFS_WRITABLE
to enable this feature.

If set to "yes", /sys, and /proc/sys will be read-write.
If set to "no", /sys, and /proc/sys will be read-only.
If set to "network" /proc/sys/net will be read-write. This is useful in
use-cases, where systemd-nspawn is used in an external network
namespace.

This adds the possibility to start privileged containers which need more
control over settings in the /proc, and /sys filesystem.

This is also a follow-up on the discussion from
https://github.com/systemd/systemd/pull/4018#r76971862 where an
introduction of a simple env var to enable R/W support for those
directories was already discussed.
2016-11-18 09:50:40 +01:00
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2016-10-17 16:54:27 +00:00

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