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Get username either by IMDS or from a local OVF file #100

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merged 3 commits into from
Jul 11, 2024

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dongsupark
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Username can be obtained either via fetching instance metadata from IMDS or mounting a local device for OVF environment file. It should not fail immediately in a single failure, instead it should fall back to the other mechanism. So it is not a good idea to use ? for query() or get_environment().

Fixes #99

@dongsupark dongsupark force-pushed the fallback-imds-local branch 2 times, most recently from 2d2a9df to 5171131 Compare July 5, 2024 10:14
@dongsupark dongsupark marked this pull request as ready for review July 10, 2024 13:24
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Pushed commits to fix minor issues in the e2e tests script.

@SeanDougherty Could you please retest with this PR, to see if the issue of #99 was gone?

I myself tried to run e2e tests with an Azure Linux gallery image, MicrosoftCBLMariner:azure-linux:azure-linux-gen2:3.20240510.01, and could not see the booting issue described. Though I am not sure if the current e2e test coverage would be enough for making the booting issue visible.
(After booting I actually hit useradd issues as already known, which would be addressed in separate PRs.)

@SeanDougherty
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Pushed commits to fix minor issues in the e2e tests script.

@SeanDougherty Could you please retest with this PR, to see if the issue of #99 was gone?

I myself tried to run e2e tests with an Azure Linux gallery image, MicrosoftCBLMariner:azure-linux:azure-linux-gen2:3.20240510.01, and could not see the booting issue described. Though I am not sure if the current e2e test coverage would be enough for making the booting issue visible. (After booting I actually hit useradd issues as already known, which would be addressed in separate PRs.)

After retesting, I can confirm this has resolved the issue. Thank you Dongsu!

And, yes, as you had mentioned, there are other issues with useradd that are being addressed in this PR

LGTM

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@jeremycline jeremycline left a comment

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A few superficial notes, but nothing blocking. At some point we should have the library provide a nice interface for this, but we can tackle that later.

src/main.rs Outdated Show resolved Hide resolved
src/main.rs Outdated Show resolved Hide resolved
Username can be obtained either via fetching instance metadata from IMDS
or mounting a local device for OVF environment file. It should not fail
immediately in a single failure, instead it should fall back to the other
mechanism. So it is not a good idea to use `?` for query() or
get_environment().

Explicitly get instance metadata to handle error of missing instance metadata
before dealing with setting ssh keys or hostname.
When running functional tests, pass in --security-type, usually
`TrustedLaunch`, which is nowadays the default for most VMs.
It is still possible to override the security type by passing in
an environment variable $VM_SECURITY_TYPE, like `Standard`.
@jeremycline jeremycline merged commit dee43fa into Azure:main Jul 11, 2024
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[BUG] media::get_environment attempts to locate a non-existent CDROM device on AzureLinux
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