v0.23.0-alpha10

Changelog

This release is mainly a code reorganisation and refactoring, significantly improving the maintainability of the codebase. This should allow us to improve further and make it easier for the maintainers to keep on top of the project.

Please remember to always back up your database between versions

Here is a short summary of the broad topics of changes:

Code has been organised into modules, reducing use of global variables/objects, isolating concerns and “putting the right things in the logical place”.

The new policy and mapper package, containing the ACL/Policy logic and the logic for creating the data served to clients (the network “map”) has been rewritten and improved. This change has allowed us to finish SSH support and add additional tests throughout the code to ensure correctness.

The “poller”, or streaming logic has been rewritten and instead of keeping track of the latest updates, checking at a fixed interval, it now uses go channels, implemented in our new notifier package and it allows us to send updates to connected clients immediately. This should both improve performance and potential latency before a client picks up an update.

Headscale now supports sending “delta” updates, thanks to the new mapper and poller logic, allowing us to only inform nodes about new nodes, changed nodes and removed nodes. Previously we sent the entire state of the network every time an update was due.

While we have a pretty good test harness for validating our changes, we have rewritten over 10000 lines of code and bugs are expected. We need help testing this release. In addition, while we think the performance should in general be better, there might be regressions in parts of the platform, particularly where we prioritised correctness over speed.

There are also several bugfixes that has been encountered and fixed as part of implementing these changes, particularly
after improving the test harness as part of adopting #1460.

BREAKING

• Code reorganisation, a lot of code has moved, please review the following PRs accordingly #1473
• Change the structure of database configuration, see config-example.yaml for the new structure. #1700
  • Old structure has been remove and the configuration must be converted.
  • Adds additional configuration for PostgreSQL for setting max open, idle conection and idle connection lifetime.
• API: Machine is now Node #1553
• Remove support for older Tailscale clients #1611
  • The latest supported client is 1.38
• Headscale checks that at least one DERP is defined at start #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
  • Add a filepath entry to derp.server.private_key_path
• Docker images are now built with goreleaser (ko) #1716 #1763
  • Entrypoint of container image has changed from shell to headscale, require change from headscale serve to serve
  • /var/lib/headscale and /var/run/headscale is no longer created automatically, see container docs
• Prefixes are now defined per v4 and v6 range. #1756
  • ip_prefixes option is now prefixes.v4 and prefixes.v6
  • prefixes.allocation can be set to assign IPs at sequential or random. #1869

Changes

• Use versioned migrations #1644
• Make the OIDC callback page better #1484
• SSH support #1487
• State management has been improved #1492
• Use error group handling to ensure tests actually pass #1535 based on #1460
• Fix hang on SIGTERM #1492 taken from #1480
• Send logs to stderr by default #1524
• Fix TS-2023-006 security UPnP issue #1563
• Turn off gRPC logging #1640 fixes #1259
• Added the possibility to manually create a DERP-map entry which can be customized, instead of automatically creating it. #1565
• Add support for deleting api keys #1702
• Add command to backfill IP addresses for nodes missing IPs from configured prefixes. #1869
• Log available update as warning #1877
• Add autogroup:internet to Policy #1917

Commits

• 10e37ec Add contributing document
• ff427cc Apply suggestions from code review
• 3927784 Apply suggestions from code review
• aba4b36 Clarify relation with Tailscale (#1908)
• fef8261 Do not access node ID when node is not found (#1912)
• 50a7d15 Update CONTRIBUTING.md
• d740ee4 Update CONTRIBUTING.md
• 87e2ae4 add autogroup:internet, fix reduce filter rules (#1917)
• cb0b495 batch updates in notifier (#1905)
• 9229d17 remove examples/, and kustomize (#1906)
• c62d557 remove multistep build, build go last, allowing cached build layers (#1903)
• 318d5d2 replace issue templates with github issue forms