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dockerd-rootless: default MTU 65520 for slirp4netns

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When DOCKERD_ROOTLESS_ROOTLESSKIT_MTU is not set, and ...
- DOCKERD_ROOTLESS_ROOTLESSKIT_NET is not set and slirp4netns
  is selected, MTU defaults to 65520.
- DOCKERD_ROOTLESS_ROOTLESSKIT_NET=slirp4netns, MTU defaults
  to 1500.

Change the logic so that, however slirp4netns is selected, MTU
defaults to 65520.

Signed-off-by: Rob Murray <rob.murray@docker.com>
This commit is contained in:
Rob Murray
2025-10-10 10:07:17 +01:00
parent 7e63d2a81b
commit a6206f2da9
1 changed files with 1 additions and 4 deletions
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5
contrib/dockerd-rootless.sh
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@@ -112,9 +112,6 @@ if [ -z "$net" ]; then
# If --netns-type is present in --help, slirp4netns is >= v0.4.0.
if slirp4netns --help | grep -qw -- --netns-type; then
net=slirp4netns
if [ -z "$mtu" ]; then
mtu=65520
fi
else
echo "slirp4netns found but seems older than v0.4.0. Checking for other network drivers."
fi
@@ -134,7 +131,7 @@ if [ -z "$net" ]; then
fi
fi
if [ -z "$mtu" ]; then
if [ "$net" = pasta ]; then
if [ "$net" = slirp4netns -o "$net" = pasta ]; then
mtu=65520
else
mtu=1500