Metadata rework

[jbaublitz]

Follow up on #3274

[mulkieran]

@jbaublitz Plz rebase and resolve conflicts.

[mulkieran]

Two requests...still working.

[jbaublitz]

/packit test

[mulkieran]

Please go ahead and extend the TMT-based udev and bind tests for v2 pools. #3643 is an indication of how to do that. The actual test changes are not at all considerable, feel free to choose something else if you want.

[mulkieran]

In pool-level metadata, "features" is double-nested. Here is an excerpt from the metadata print out.

  "features": {
    "features": [
      "Encryption"
    ]
  },

[jbaublitz]

In pool-level metadata, "features" is double-nested. Here is an excerpt from the metadata print out.

  "features": {
    "features": [
      "Encryption"
    ]
  },

This is not a bug, but rather the result of the default behavior for serde derive. We chose to wrap the features in a new-type struct which is resulting in the double nesting. To change the behavior you're seeing if it's important to you, I think we could either replace the new-type struct with a Vector in the metadata or we could rename one of the keys.

[mulkieran]

In pool-level metadata, "features" is double-nested. Here is an excerpt from the metadata print out.

  "features": {
    "features": [
      "Encryption"
    ]
  },

This is not a bug, but rather the result of the default behavior for serde derive. We chose to wrap the features in a new-type struct which is resulting in the double nesting. To change the behavior you're seeing if it's important to you, I think we could either replace the new-type struct with a Vector in the metadata or we could rename one of the keys.

It is certainly a consequence of the default behavior for serde_derive and it works perfectly correctly within stratisd. The reason I noticed it at all was while writing tests external to stratisd that verify invariants that should hold for the metadata. The question is, is it the metadata structure we want to support or would we prefer to avoid that apparently redundant key?

[jbaublitz]

/packit test

[jbaublitz]

I think this might be a timing issue which is why I can't reproduce it locally. Last time rawhide succeeded.

[mulkieran]

Typo located...

[mulkieran]

One more...

[mulkieran]

Approved, modulo the requirement to remove temporary test redirects.