-
-
Notifications
You must be signed in to change notification settings - Fork 636
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Reinitialize pantsd for most configuration changes (#10035)
### Problem Currently we restart pantsd for most configuration changes, and exclude a small set of bootstrap options (by marking them `daemon=False`) that should not trigger a restart. But in most cases, restarting is heavy-handed. We'd like to be able to keep more and more of our state alive over time as we continue to remove global mutable state (in order to allow us to tackle #7654, among other things). Additionally, the pantsd client currently implements the fingerprinting that decides when the server should restart, which blocks moving the pantsd client to rust. We'd like the client to only need to interact with a small set of options to simplify its implementation. ### Solution Move the nailgun server out of the `PantsService` model and directly into the `PantsDaemon` class. Share a `PantsDaemonCore` between the daemon and `DaemonPantsRunner` that encapsulates the current `Scheduler` and all live services. Finally, have the `PantsDaemonCore` implement fingerprinting to decide when to reinitialize/recreate the `Scheduler` (without restarting) and trim down the options that trigger a restart (`daemon=True`) to only those that are used to start the daemon itself (rather than to create the `Scheduler`). ### Result `pantsd` will stay up through the vast majority of options changes (with the exception of a handful of "micro-bootstrap" options), and will instead reinitialize the `Scheduler` for bootstrap options changes with some useful output when it does so. Example: ``` $ ./pants help 23:26:22 [INFO] initializing pantsd... 23:26:24 [INFO] pantsd initialized. Pants 1.30.0.dev0 https://pypi.org/pypi/pantsbuild.pants/1.30.0.dev0 Usage: <snip> $ ./pants --no-v1 help 23:26:31 [INFO] initialization options changed: reinitializing pantsd... 23:26:32 [INFO] pantsd initialized. Pants 1.30.0.dev0 https://pypi.org/pypi/pantsbuild.pants/1.30.0.dev0 Usage: <snip> ``` This prepares to port the client to rust, and unblocks a fix for #8200, by having the `PantsDaemon` class tear down the nailgun server cleanly in the foreground if any services exit. Fixes #6114, fixes #7573, and fixes #10041.
- Loading branch information
Showing
33 changed files
with
507 additions
and
632 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.