2019-03-30 02:40:11 +00:00
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+++
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title = "FAQ"
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weight = 1000
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+++
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2019-03-30 04:09:15 +00:00
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2019-04-14 22:43:24 +00:00
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### What operating systems are supported?
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2019-04-16 22:44:35 +00:00
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gVisor requires Linux {{< required_linux >}} ([older Linux][old-linux]).
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2019-04-14 22:43:24 +00:00
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### What CPU architectures are supported?
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gVisor currently supports [x86_64/AMD64](https://en.wikipedia.org/wiki/X86-64)
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compatible processors.
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### Do I need to modify my Linux application to use gVisor?
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No. gVisor is capable of running unmodified Linux binaries.
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### What binary formats does gVisor support?
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gVisor supports Linux
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[ELF](https://en.wikipedia.org/wiki/Executable_and_Linkable_Format) binaries.
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Binaries run in gVisor should be built for the
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[AMD64](https://en.wikipedia.org/wiki/X86-64) CPU architecture.
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### Can I run Docker images using gVisor.
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Yes. Please see the [Docker Quick Start](/docs/user_guide/docker/).
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## Troubleshooting
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2019-03-30 04:09:15 +00:00
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### My container runs fine with `runc` but fails with `runsc`
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2019-03-30 02:40:11 +00:00
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If you’re having problems running a container with `runsc` it’s most likely due
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to a compatibility issue or a missing feature in gVisor. See
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[Debugging](../debugging/).
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2019-07-10 17:38:53 +00:00
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### When I run my container, docker fails with: `open /run/containerd/.../<containerid>/log.json: no such file or directory`
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2019-05-31 11:27:24 +00:00
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You are using an older version of Linux which doesn't support `memfd_create`.
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gVisor requires Linux {{< required_linux >}} ([older Linux][old-linux]).
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[comment]: # (TODO[gvisor.dev/issue/268] remove when better error messages are implemented.)
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2019-03-30 04:09:15 +00:00
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### When I run my container, docker fails with: `flag provided but not defined: -console`
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2019-03-30 02:40:11 +00:00
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You're using an old version of Docker. See [Docker Quick Start](../docker/).
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2019-03-30 04:09:15 +00:00
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### I can’t see a file copied with: `docker cp`
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2019-03-30 02:40:11 +00:00
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For performance reasons, gVisor caches directory contents, and therefore it may
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not realize a new file was copied to a given directory. To invalidate the cache
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and force a refresh, create a file under the directory in question and list the
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contents again.
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2019-04-03 19:18:46 +00:00
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As a workaround, shared root filesystem can be enabled. See [Filesystem](../filesystem/).
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2019-03-30 02:40:11 +00:00
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This bug is tracked in [bug #4](https://github.com/google/gvisor/issues/4).
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Note that `kubectl cp` works because it does the copy by exec'ing inside the
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2019-04-03 19:18:46 +00:00
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sandbox, and thus gVisor's internal cache is made aware of the new files and
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directories.
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2019-03-30 02:40:11 +00:00
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2019-07-10 17:38:53 +00:00
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### I'm getting an error like: `panic: unable to attach: operation not permitted`
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Make sure that permissions and the owner is correct on the `runsc` binary.
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```bash
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sudo chown root:root /usr/local/bin/runsc
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sudo chmod 0755 /usr/local/bin/runsc
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```
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2019-03-30 04:09:15 +00:00
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### What's the security model?
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2019-03-30 02:40:11 +00:00
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See the [Security Model](../../architecture_guide/security/).
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2019-04-16 22:44:35 +00:00
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[old-linux]: /docs/user_guide/networking/#gso
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