Increase UDP buffer sizes (#1024)

* Increase UDP buffer sizes The new size is 7.5M as recommended by quic-go [1] [1]: https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes/a3327deff89d2428d48596ce0e643531f9944f99 Signed-off-by: Mauro Morales <[email protected]> * Bump version Signed-off-by: Mauro Morales <[email protected]> * Add source of the rmem_max * Bump version --------- Signed-off-by: Mauro Morales <[email protected]>
kairos-io · Sep 27, 2024 · 0ad384e · 0ad384e
1 parent 08a1048
commit 0ad384e
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Showing 5 changed files with 13 additions and 6 deletions.
diff --git a/packages/static/kairos-overlay-files/collection.yaml b/packages/static/kairos-overlay-files/collection.yaml
@@ -1,4 +1,4 @@
 packages:
   - name: "kairos-overlay-files"
     category: "static"
-    version: "1.1.52"
+    version: "1.1.53"
diff --git a/packages/static/kairos-overlay-files/files/etc/systemd/system/kairos-recovery.service b/packages/static/kairos-overlay-files/files/etc/systemd/system/kairos-recovery.service
@@ -7,7 +7,9 @@ StandardInput=tty
 StandardOutput=tty
 LimitNOFILE=49152
 ExecStartPre=-/bin/sh -c "dmesg -D"
-ExecStartPre=-/bin/sh -c "sysctl -w net.core.rmem_max=2500000"
+# This source explains why we are using this number
+# https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes/a3327deff89d2428d48596ce0e643531f9944f99
+ExecStartPre=-/bin/sh -c "sysctl -w net.core.rmem_max=7500000"
 # Stop systemd messages on tty
 ExecStartPre=-/usr/bin/kill -SIGRTMIN+21 1
 TTYPath=/dev/tty1
@@ -16,4 +18,4 @@ ExecStart=/usr/bin/kairos-agent recovery
 # Start systemd messages on tty
 ExecStartPost=-/usr/bin/kill -SIGRTMIN+20 1
 [Install]
-WantedBy=multi-user.target
+WantedBy=multi-user.target
diff --git a/packages/static/kairos-overlay-files/files/system/oem/09_systemd_services.yaml b/packages/static/kairos-overlay-files/files/system/oem/09_systemd_services.yaml
@@ -7,7 +7,9 @@ stages:
   boot:
     - name: "Default sysctl settings"
       sysctl:
-        net.core.rmem_max: 2500000
+	# This source explains why we are using this number
+	# https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes/a3327deff89d2428d48596ce0e643531f9944f99
+        net.core.rmem_max: 7500000
         vm.max_map_count: 262144
         fs.inotify.max_user_instances: 8192
         fs.inotify.max_user_watches: 524288

diff --git a/packages/utils/edgevpn-systemd/definition.yaml b/packages/utils/edgevpn-systemd/definition.yaml
@@ -1,6 +1,6 @@
 name: edgevpn
 category: systemd-service
-version: "20211216"
+version: "20240830"
 requires:
 - name: edgevpn
   category: utils

diff --git a/packages/utils/edgevpn-systemd/edgevpn.service b/packages/utils/edgevpn-systemd/edgevpn.service
@@ -5,7 +5,10 @@ After=network.target
 [Service]
 EnvironmentFile=/etc/systemd/system.conf.d/edgevpn.env
 LimitNOFILE=49152
-ExecStartPre=-/bin/sh -c "sysctl -w net.core.rmem_max=2500000"
+# This source explains why we are using this number
+# https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes/a3327deff89d2428d48596ce0e643531f9944f99
+ExecStartPre=-/bin/sh -c "sysctl -w net.core.rmem_max=7500000"
+ExecStartPre=-/bin/sh -c "sysctl -w net.core.wmem_max=7500000"
 ExecStart=/usr/bin/edgevpn
 Restart=always