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Replace database locks with transactions (#1701)

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This commits removes the locks used to guard data integrity for the
database and replaces them with Transactions, turns out that SQL had
a way to deal with this all along.

This reduces the complexity we had with multiple locks that might stack
or recurse (database, nofitifer, mapper). All notifications and state
updates are now triggered _after_ a database change.


Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby 2024-02-08 17:28:19 +01:00 • committed by GitHub
parent cbf57e27a7
commit 83769ba715
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32 changed files with 1496 additions and 1128 deletions
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CHANGELOG.md
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@ -26,7 +26,7 @@ after improving the test harness as part of adopting [#1460](https://github.com/
- Code reorganisation, a lot of code has moved, please review the following PRs accordingly [#1473](https://github.com/juanfont/headscale/pull/1473)
- API: Machine is now Node [#1553](https://github.com/juanfont/headscale/pull/1553)
- Remove support for older Tailscale clients [#1611](https://github.com/juanfont/headscale/pull/1611)
- The latest supported client is 1.36
- The latest supported client is 1.38
- Headscale checks that _at least_ one DERP is defined at start [#1564](https://github.com/juanfont/headscale/pull/1564)
- If no DERP is configured, the server will fail to start, this can be because it cannot load the DERPMap from file or url.
- Embedded DERP server requires a private key [#1611](https://github.com/juanfont/headscale/pull/1611)