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build: Package sysctl configuration to raise UDP buffer size on Linux (#7417)

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* Provide a sysctl config to raise max UDP buffer size

* Add sysctl config to deb

* Check if `deb-systemd-invoke` is available

Co-authored-by: otbutz <tbutz@optitool.de>
This commit is contained in:
bt90 2021-03-05 08:08:29 +01:00 committed by GitHub
parent 4735575e8d
commit c1d06d9501
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4 changed files with 30 additions and 0 deletions
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1
build.go
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@ -115,6 +115,7 @@ var targets = map[string]target{
{src: "etc/linux-systemd/system/syncthing@.service", dst: "deb/lib/systemd/system/syncthing@.service", perm: 0644},
{src: "etc/linux-systemd/system/syncthing-resume.service", dst: "deb/lib/systemd/system/syncthing-resume.service", perm: 0644},
{src: "etc/linux-systemd/user/syncthing.service", dst: "deb/usr/lib/systemd/user/syncthing.service", perm: 0644},
{src: "etc/linux-sysctl/30-syncthing.conf", dst: "deb/usr/lib/sysctl.d/30-syncthing.conf", perm: 0644},
{src: "etc/firewall-ufw/syncthing", dst: "deb/etc/ufw/applications.d/syncthing", perm: 0644},
{src: "etc/linux-desktop/syncthing-start.desktop", dst: "deb/usr/share/applications/syncthing-start.desktop", perm: 0644},
{src: "etc/linux-desktop/syncthing-ui.desktop", dst: "deb/usr/share/applications/syncthing-ui.desktop", perm: 0644},

3
etc/linux-sysctl/30-syncthing.conf Normal file
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@ -0,0 +1,3 @@
# Increase maximum receive socket buffer size to 2MiB for QUIC connections
# see https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
net.core.rmem_max = 2097152

21
etc/linux-sysctl/README.md Normal file
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@ -0,0 +1,21 @@
sysctl configuration to raise UDP buffer size
===================
Installation
-----------
**Please note:** When you installed syncthing using the official deb package, you can skip the copying.
Copy the file `30-syncthing.conf` to `/etc/sysctl.d/` (root permissions required).
In a terminal run
```
sudo sysctl -q --system
```
to apply the sysctl changes.
Verification
----------
You can verify that the new limit is active using
```
sysctl net.core.rmem_max
```

5
script/post-upgrade
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@ -1,3 +1,8 @@
#!/bin/sh
if command -v deb-systemd-invoke > /dev/null; then
deb-systemd-invoke restart procps.service
else
sysctl -q --system
fi
pkill -HUP -x syncthing || true