package consul import ( "fmt" "github.com/hashicorp/serf/serf" ) // lanMergeDelegate is used to handle a cluster merge on the LAN gossip // ring. We check that the peers are in the same datacenter and abort the // merge if there is a mis-match. type lanMergeDelegate struct { dc string } func (md *lanMergeDelegate) NotifyMerge(members []*serf.Member) error { for _, m := range members { ok, dc := isConsulNode(*m) if ok { if dc != md.dc { return fmt.Errorf("Member '%s' part of wrong datacenter '%s'", m.Name, dc) } continue } ok, parts := isConsulServer(*m) if ok && parts.Datacenter != md.dc { return fmt.Errorf("Member '%s' part of wrong datacenter '%s'", m.Name, parts.Datacenter) } } return nil } // wanMergeDelegate is used to handle a cluster merge on the WAN gossip // ring. We check that the peers are server nodes and abort the merge // otherwise. type wanMergeDelegate struct { } func (md *wanMergeDelegate) NotifyMerge(members []*serf.Member) error { for _, m := range members { ok, _ := isConsulServer(*m) if !ok { return fmt.Errorf("Member '%s' is not a server", m.Name) } } return nil }