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`docker run --cpuset-cpus=/--cpus=` will generate cpu resource info in config.json
(runtime spec file). When nginx worker_connections is configured as auto, the worker is
generated according to the number of CPUs. If the cgroup is already set on the host, but
it is not displayed correctly in the sandbox, performance may be degraded.
This patch can get cpus info from spec file and apply to sentry on bootup, so the
/proc/cpuinfo can show the correct cpu numbers. `lscpu` and other commands rely on
`/sys/devices/system/cpu/online` are also affected by this patch.
e.g.
--cpuset-cpus=2,3 -> cpu number:2
--cpuset-cpus=4-7 -> cpu number:4
--cpus=2.8 -> cpu number:3
--cpus=0.5 -> cpu number:1
Change-Id: Ideb22e125758d4322a12be7c51795f8018e3d316
PiperOrigin-RevId: 213685199
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When starting a sandbox without direct file or network access, we create an
empty user namespace and run the sandbox in there. However, the root user in
that namespace is still mapped to the root user in the parent namespace.
This CL maps the "nobody" user from the parent namespace into the child
namespace, and runs the sandbox process as user "nobody" inside the new
namespace.
PiperOrigin-RevId: 211572223
Change-Id: I1b1f9b1a86c0b4e7e5ca7bc93be7d4887678bab6
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Now each container gets its own dedicated gofer that is chroot'd to the
rootfs path. This is done to add an extra layer of security in case the
gofer gets compromised.
PiperOrigin-RevId: 210396476
Change-Id: Iba21360a59dfe90875d61000db103f8609157ca0
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PiperOrigin-RevId: 206834838
Change-Id: I9a44c6fa5f4766a01f86e90810f025cefecdf2d4
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Closes #66
PiperOrigin-RevId: 202496258
Change-Id: Ib9287c5bf1279ffba1db21ebd9e6b59305cddf34
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PiperOrigin-RevId: 195365050
Change-Id: I8754dc7a3fc2975d422cae453762a455478a8e6a
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PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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