mirror of https://github.com/hashicorp/consul
43 lines
1.5 KiB
Go
43 lines
1.5 KiB
Go
|
// Copyright (c) HashiCorp, Inc.
|
||
|
|
// SPDX-License-Identifier: BUSL-1.1
|
||
|
|
|
||
|
|
package dns
|
||
|
|
|
||
|
|
import "github.com/hashicorp/consul/acl"
|
||
|
|
|
||
|
|
// queryLocality is the locality parsed from a DNS query.
|
||
|
|
type queryLocality struct {
|
||
|
|
// datacenter is the datacenter parsed from a label that has an explicit datacenter part.
|
||
|
|
// Example query: <service>.virtual.<namespace>.ns.<partition>.ap.<datacenter>.dc.consul
|
||
|
|
datacenter string
|
||
|
|
|
||
|
|
// peer is the peer name parsed from a label that has explicit parts.
|
||
|
|
// Example query: <service>.virtual.<namespace>.ns.<peer>.peer.<partition>.ap.consul
|
||
|
|
peer string
|
||
|
|
|
||
|
|
// peerOrDatacenter is parsed from DNS queries where the datacenter and peer name are
|
||
|
|
// specified in the same query part.
|
||
|
|
// Example query: <service>.virtual.<peerOrDatacenter>.consul
|
||
|
|
//
|
||
|
|
// Note that this field should only be a "peer" for virtual queries, since virtual IPs should
|
||
|
|
// not be shared between datacenters. In all other cases, it should be considered a DC.
|
||
|
|
peerOrDatacenter string
|
||
|
|
|
||
|
|
acl.EnterpriseMeta
|
||
|
|
}
|
||
|
|
|
||
|
|
// EffectiveDatacenter returns the datacenter parsed from a query, or a default
|
||
|
|
// value if none is specified.
|
||
|
|
func (l queryLocality) EffectiveDatacenter(defaultDC string) string {
|
||
|
|
// Prefer the value parsed from a query with explicit parts: <namespace>.ns.<partition>.ap.<datacenter>.dc
|
||
|
|
if l.datacenter != "" {
|
||
|
|
return l.datacenter
|
||
|
|
}
|
||
|
|
// Fall back to the ambiguously parsed DC or Peer.
|
||
|
|
if l.peerOrDatacenter != "" {
|
||
|
|
return l.peerOrDatacenter
|
||
|
|
}
|
||
|
|
// If all are empty, use a default value.
|
||
|
|
return defaultDC
|
||
|
|
}
|