Feature: flush fakeip pool

component/fakeip/pool.go

@@ -18,6 +18,7 @@ type store interface {
 	DelByIP(ip net.IP)
 	Exist(ip net.IP) bool
 	CloneTo(store)
+	FlushFakeIP() error
 }
 
 // Pool is a implementation about fake ip generator without storage
@@ -120,6 +121,10 @@ func (p *Pool) get(host string) net.IP {
 	return ip
 }
 
+func (p *Pool) FlushFakeIP() error {
+	return p.store.FlushFakeIP()
+}
+
 func ipToUint(ip net.IP) uint32 {
 	v := uint32(ip[0]) << 24
 	v += uint32(ip[1]) << 16