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feat: preserve vip on leadership loss

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When in arp mode, when preserveVipOnLeadershipLoss is true, when a node loses leadership (or can't keep it),
this will stop performing ARPs but will wait until a new leader is elected before deleting the arp.

when the flag is set to false (default) it continue to function like normal.

Signed-off-by: Brian Davis <slimm609@gmail.com>
Signed-off-by: Brian Davis <dbrian@vmware.com>
This commit is contained in:
Brian Davis
2025-10-25 08:13:09 -04:00
parent 95c45b0b32
commit 9786aa9446
8 changed files with 122 additions and 32 deletions
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cmd/kube-vip.go
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@@ -67,6 +67,7 @@ func init() {
kubeVipCmd.PersistentFlags().BoolVar(&initConfig.EnableARP, "arp", false, "Enable Arp for VIP changes")
kubeVipCmd.PersistentFlags().BoolVar(&initConfig.EnableWireguard, "wireguard", false, "Enable Wireguard for services VIPs")
kubeVipCmd.PersistentFlags().BoolVar(&initConfig.EnableRoutingTable, "table", false, "Enable Routing Table for services VIPs")
kubeVipCmd.PersistentFlags().BoolVar(&initConfig.PreserveVIPOnLeadershipLoss, "preserveVipOnLeadershipLoss", false, "Preserve ARP VIP addresses on interface when leadership is lost (default: false for backward compatibility)")
// LoadBalancer flags
kubeVipCmd.PersistentFlags().BoolVar(&initConfig.EnableLoadBalancer, "enableLoadBalancer", false, "enable loadbalancing on the VIP with IPVS")