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docs: Add warning to snap build

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Since we must build with `--destructive-mode`, add a warning that the
host environment could change the behaviour of the build, depending on
the packages installed on the system.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
This commit is contained in:
James O. D. Hunt 2022-05-26 14:11:40 +01:00
parent d759f6c3e5
commit 894f661cc4
1 changed files with 14 additions and 0 deletions
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snap/local/README.md
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@ -28,6 +28,20 @@ Run the command below which will use the packaging Makefile to build the snap im
$ make -C tools/packaging snap
```
> **Warning:**
>
> By default, `snapcraft` will create a clean virtual machine
> environment to build the snap in using the `multipass` tool.
>
> However, `multipass` is silently disabled when `--destructive-mode` is
> used.
>
> Since building the Kata Containers package currently requires
> `--destructive-mode`, the snap will be built using the host
> environment. To avoid parts of the build auto-detecting additional
> features to enable (for example for QEMU), we recommend that you
> only run the snap build in a minimal host environment.
To install the resulting snap image, snap must be put in [classic mode][3] and the
security confinement must be disabled (*--classic*). Also since the resulting snap
has not been signed the verification of signature must be omitted (*--dangerous*).