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dhcp: Add priority option to dhcp.

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Currently, we can not set the metric of routes in dhcp.
It's ok if there is only a network interface.

But if there are multiple network interfaces, and both have a default route,
We need to set the metric of the route to make the traffic
go through the correct network interface.

For host-local and static, we can set the metric with the route.priority option.
But there is no such option for dhcp.

Signed-off-by: Songmin Li <lisongmin@protonmail.com>
This commit is contained in:
Songmin Li
2024-09-14 18:21:24 +08:00
committed by Casey Callendrello
parent 03712a572b
commit cc8b1bd80c
3 changed files with 9 additions and 1 deletions
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3
pkg/ipam/ipam_linux.go
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@ -117,6 +117,7 @@ func ConfigureIface(ifName string, res *current.Result) error {
Dst: &r.Dst,
LinkIndex: link.Attrs().Index,
Gw: gw,
Priority: r.Priority,
}
if r.Table != nil {
@ -128,7 +129,7 @@ func ConfigureIface(ifName string, res *current.Result) error {
}
if err = netlink.RouteAddEcmp(&route); err != nil {
return fmt.Errorf("failed to add route '%v via %v dev %v (Scope: %v, Table: %d)': %v", r.Dst, gw, ifName, route.Scope, route.Table, err)
return fmt.Errorf("failed to add route '%v via %v dev %v metric %d (Scope: %v, Table: %d)': %v", r.Dst, gw, ifName, r.Priority, route.Scope, route.Table, err)
}
}