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Document limitations of docker-in-gvisor #12146

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Document limitations of docker-in-gvisor #12146

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stepancheg
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Fixes #12145.

milantracy
milantracy reviewed Sep 18, 2025
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g3doc/user_guide/tutorials/docker-in-gvisor.md Outdated
- because iptables disabled, `docker run --expose=` does not expose the port;
if a nested container needs to expose ports, inside gVisor use `docker run --network=host`
- docker 28 may not work
- docker compose does not work ([#7469](https://github.com/google/gvisor/issues/7469))
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the only issue with docker compose is when it uses bridge network driver when docker compose run, there is DNS issue. please see

gvisor/test/image/image_test.go

Line 676 in 2925932

func testDockerComposeBuild(ctx context.Context, t *testing.T, d *dockerutil.Container, opts dockerCommandOptions) {

docker compose mostly works in gVisor

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I removed the phrase about docker compose, because I don't understand how significant the issue with DNS.

If it is significant, I can add it back.

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thanks! other than the nitpick, lgtm

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Document limitations of docker-in-gvisor
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