mirror of https://github.com/hashicorp/consul
75 lines
2.4 KiB
Go
75 lines
2.4 KiB
Go
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// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package proxystateconverter
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import (
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"fmt"
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"strings"
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"github.com/hashicorp/consul/agent/connect"
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"github.com/hashicorp/consul/agent/proxycfg"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/agent/xds/naming"
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"github.com/hashicorp/consul/proto/private/pbpeering"
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)
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const (
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meshGatewayExportedClusterNamePrefix = "exported~"
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)
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func makeExposeClusterName(destinationPort int) string {
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return fmt.Sprintf("exposed_cluster_%d", destinationPort)
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}
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func clusterNameForDestination(cfgSnap *proxycfg.ConfigSnapshot, name string, address string, namespace string, partition string) string {
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name = destinationSpecificServiceName(name, address)
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sni := connect.ServiceSNI(name, "", namespace, partition, cfgSnap.Datacenter, cfgSnap.Roots.TrustDomain)
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// Prefixed with destination to distinguish from non-passthrough clusters for the same upstream.
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return "destination." + sni
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}
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func destinationSpecificServiceName(name string, address string) string {
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address = strings.ReplaceAll(address, ":", "-")
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address = strings.ReplaceAll(address, ".", "-")
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return fmt.Sprintf("%s.%s", address, name)
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}
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// generatePeeredClusterName returns an SNI-like cluster name which mimics PeeredServiceSNI
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// but excludes partition information which could be ambiguous (local vs remote partition).
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func generatePeeredClusterName(uid proxycfg.UpstreamID, tb *pbpeering.PeeringTrustBundle) string {
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return strings.Join([]string{
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uid.Name,
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uid.NamespaceOrDefault(),
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uid.Peer,
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"external",
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tb.TrustDomain,
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}, ".")
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}
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func (s *Converter) getTargetClusterName(upstreamsSnapshot *proxycfg.ConfigSnapshotUpstreams, chain *structs.CompiledDiscoveryChain, tid string, forMeshGateway bool) string {
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target := chain.Targets[tid]
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clusterName := target.Name
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targetUID := proxycfg.NewUpstreamIDFromTargetID(tid)
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if targetUID.Peer != "" {
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tbs, ok := upstreamsSnapshot.UpstreamPeerTrustBundles.Get(targetUID.Peer)
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// We can't generate cluster on peers without the trust bundle. The
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// trust bundle should be ready soon.
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if !ok {
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s.Logger.Debug("peer trust bundle not ready for discovery chain target",
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"peer", targetUID.Peer,
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"target", tid,
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)
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return ""
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}
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clusterName = generatePeeredClusterName(targetUID, tbs)
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}
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clusterName = naming.CustomizeClusterName(clusterName, chain)
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if forMeshGateway {
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clusterName = meshGatewayExportedClusterNamePrefix + clusterName
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}
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return clusterName
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}
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