75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
package consul
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import (
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"fmt"
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"github.com/hashicorp/consul/consul/agent"
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"github.com/hashicorp/consul/types"
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"github.com/hashicorp/serf/serf"
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)
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// lanMergeDelegate is used to handle a cluster merge on the LAN gossip
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// ring. We check that the peers are in the same datacenter and abort the
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// merge if there is a mis-match.
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type lanMergeDelegate struct {
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dc string
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nodeID types.NodeID
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nodeName string
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}
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func (md *lanMergeDelegate) NotifyMerge(members []*serf.Member) error {
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nodeMap := make(map[types.NodeID]string)
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for _, m := range members {
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if rawID, ok := m.Tags["id"]; ok && rawID != "" {
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nodeID := types.NodeID(rawID)
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// See if there's another node that conflicts with us.
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if (nodeID == md.nodeID) && (m.Name != md.nodeName) {
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return fmt.Errorf("Member '%s' has conflicting node ID '%s' with this agent's ID",
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m.Name, nodeID)
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}
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// See if there are any two nodes that conflict with each
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// other. This lets us only do joins into a hygienic
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// cluster now that node IDs are critical for operation.
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if other, ok := nodeMap[nodeID]; ok {
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return fmt.Errorf("Member '%s' has conflicting node ID '%s' with member '%s'",
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m.Name, nodeID, other)
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}
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nodeMap[nodeID] = m.Name
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}
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ok, dc := isConsulNode(*m)
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if ok {
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if dc != md.dc {
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return fmt.Errorf("Member '%s' part of wrong datacenter '%s'",
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m.Name, dc)
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}
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continue
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}
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ok, parts := agent.IsConsulServer(*m)
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if ok && parts.Datacenter != md.dc {
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return fmt.Errorf("Member '%s' part of wrong datacenter '%s'",
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m.Name, parts.Datacenter)
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}
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}
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return nil
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}
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// wanMergeDelegate is used to handle a cluster merge on the WAN gossip
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// ring. We check that the peers are server nodes and abort the merge
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// otherwise.
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type wanMergeDelegate struct {
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}
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func (md *wanMergeDelegate) NotifyMerge(members []*serf.Member) error {
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for _, m := range members {
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ok, _ := agent.IsConsulServer(*m)
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if !ok {
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return fmt.Errorf("Member '%s' is not a server", m.Name)
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}
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}
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return nil
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}
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