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network: add auto-detection of optimal MTU for WireGuard interface, --wg-mtu flag, set max_mtu for Corrosion to 1232

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This commit is contained in:
Pasha Sviderski
2026-06-16 21:36:12 +10:00
parent 2f76187bf5
commit 0c3b8b122f
18 changed files with 373 additions and 170 deletions
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cmd/uncloud/machine/add.go
+10
View File
@@ -30,6 +30,7 @@ type addOptions struct {
version string
wgEndpoints []string
wgPort int
wgMTU int
yes bool
}
@@ -104,6 +105,10 @@ Connection methods:
"Multiple endpoints can be specified by repeating the flag or using a comma-separated list.\n"+
"Defaults to the auto-detected public and routable machine IPs.",
)
cmd.Flags().IntVar(
&opts.wgMTU, "wg-mtu", 0,
"MTU of the WireGuard network interface on the machine. (default auto-detects the optimal value)",
)
cmd.Flags().IntVar(
&opts.wgPort, "wg-port", network.DefaultWireGuardPort,
"UDP port WireGuard listens on for incoming connections from other machines.",
@@ -133,12 +138,17 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteMachine,
if opts.wgPort < 1 || opts.wgPort > 65535 {
return fmt.Errorf("invalid WireGuard port %d: must be between 1 and 65535", opts.wgPort)
}
if opts.wgMTU != 0 && (opts.wgMTU < network.MinWireGuardMTU || opts.wgMTU > 65535) {
return fmt.Errorf("invalid WireGuard MTU %d: must be 0 (auto-detect) or between %d and 65535",
opts.wgMTU, network.MinWireGuardMTU)
}
addOpts := cli.AddMachineOptions{
MachineName: opts.name,
PublicIP: publicIP,
RemoteMachine: remoteMachine,
SkipInstall: opts.noInstall,
Version: opts.version,
WireguardMTU: opts.wgMTU,
WireguardPort: opts.wgPort,
AutoConfirm: opts.yes,
}
cmd/uncloud/machine/init.go
+10
View File
@@ -34,6 +34,7 @@ type initOptions struct {
version string
wgEndpoints []string
wgPort int
wgMTU int
yes bool
}
@@ -143,6 +144,10 @@ Connection methods:
"Multiple endpoints can be specified by repeating the flag or using a comma-separated list.\n"+
"Defaults to the auto-detected public and routable machine IPs.",
)
cmd.Flags().IntVar(
&opts.wgMTU, "wg-mtu", 0,
"MTU of the WireGuard network interface on the machine. (default auto-detects the optimal value)",
)
cmd.Flags().IntVar(
&opts.wgPort, "wg-port", network.DefaultWireGuardPort,
"UDP port WireGuard listens on for incoming connections from other machines.",
@@ -186,6 +191,10 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
if opts.wgPort < 1 || opts.wgPort > 65535 {
return fmt.Errorf("invalid WireGuard port %d: must be between 1 and 65535", opts.wgPort)
}
if opts.wgMTU != 0 && (opts.wgMTU < network.MinWireGuardMTU || opts.wgMTU > 65535) {
return fmt.Errorf("invalid WireGuard MTU %d: must be 0 (auto-detect) or between %d and 65535",
opts.wgMTU, network.MinWireGuardMTU)
}
initOpts := cli.InitClusterOptions{
Context: opts.context,
MachineName: opts.name,
@@ -194,6 +203,7 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
RemoteMachine: remoteMachine,
SkipInstall: opts.noInstall,
Version: opts.version,
WireguardMTU: opts.wgMTU,
WireguardPort: opts.wgPort,
AutoConfirm: opts.yes,
}