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OCPBUGS-3176: Enable IP Forwarding if disabled #549

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Merged
openshift-merge-robot merged 1 commit into from
May 26, 2023
Merged

OCPBUGS-3176: Enable IP Forwarding if disabled #549

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9 changes: 7 additions & 2 deletions pkg/network/node/sdn_controller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -103,12 +103,17 @@ func deleteLocalSubnetRoute(device, localSubnetCIDR string) {
func (plugin *OsdnNode) SetupSDN() (bool, map[string]podNetworkInfo, error) {
// Make sure IPv4 forwarding state is 1
sysctl := sysctl.New()
val, err := sysctl.GetSysctl("net/ipv4/ip_forward")
sysIPForward := "net/ipv4/ip_forward"
val, err := sysctl.GetSysctl(sysIPForward)
if err != nil {
return false, nil, fmt.Errorf("could not get IPv4 forwarding state: %s", err)
}
if val != 1 {
return false, nil, fmt.Errorf("net/ipv4/ip_forward=0, it must be set to 1")
klog.Infof("Global IP Forwarding is disabled. Enabling...")
err := sysctl.SetSysctl(sysIPForward, 1)
if err != nil {
return false, nil, fmt.Errorf("cannot enable IP Forwarding via sysctl: %v", err)
}
}

localSubnetCIDR := plugin.localSubnetCIDR
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