dendrite/setup/base/sanity_unix.go
0x1a8510f2 46902e5766
Take advantage of changes in recent Go versions (#3361)
Given that #2714 wasn't merged but we are now at a minimum supported Go
version of 1.20 (soon to be 1.21), I wanted to carry over some of the
changes. Namely:
- Fix the log typo
- Simplify build constraints for unix
- Use stdlib atomic package

### Pull Request Checklist

<!-- Please read
https://matrix-org.github.io/dendrite/development/contributing before
submitting your pull request -->

* [x] I have added Go unit tests or [Complement integration
tests](https://github.com/matrix-org/complement) for this PR _or_ I have
justified why this PR doesn't need tests
* [x] Pull request includes a [sign off below using a legally
identifiable
name](https://matrix-org.github.io/dendrite/development/contributing#sign-off)
_or_ I have already signed off privately

Signed-off-by: `0x1a8510f2 <admin@0x1a8510f2.space>`

---------

Co-authored-by: devonh <devon.dmytro@gmail.com>
2024-05-01 00:38:36 +00:00

36 lines
1.4 KiB
Go

//go:build unix
// +build unix
package base
import (
"syscall"
"github.com/sirupsen/logrus"
)
func PlatformSanityChecks() {
// Dendrite needs a relatively high number of file descriptors in order
// to function properly, particularly when federating with lots of servers.
// If we run out of file descriptors, we might run into problems accessing
// PostgreSQL amongst other things. Complain at startup if we think the
// number of file descriptors is too low.
warn := func(rLimit *syscall.Rlimit) {
logrus.Warnf("IMPORTANT: Process file descriptor limit is currently %d, it is recommended to raise the limit for Dendrite to at least 65535 to avoid issues", rLimit.Cur)
}
var rLimit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil && rLimit.Cur < 65535 {
// The file descriptor count is too low. Let's try to raise it.
rLimit.Cur = 65535
if err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
// We failed to raise it, so log an error.
logrus.WithError(err).Warn("IMPORTANT: Failed to raise the file descriptor limit")
warn(&rLimit)
} else if err = syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil && rLimit.Cur < 65535 {
// We think we successfully raised the limit, but a second call to
// get the limit told us that we didn't succeed. Log an error.
warn(&rLimit)
}
}
}