From 764f89e1d856169ca7c86466a9e93ea91793cc40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Mierzwa?= <l.mierzwa@gmail.com>
Date: Fri, 30 Nov 2018 18:57:52 +0000
Subject: [PATCH] feat(api): expose all known Alertmanager clusters

---
 alerts.go                       | 17 ++++++++++++++++-
 internal/models/alertmanager.go |  1 +
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/alerts.go b/alerts.go
index 358cde79b..267c7f189 100644
--- a/alerts.go
+++ b/alerts.go
@@ -1,6 +1,9 @@
 package main
 
 import (
+	"sort"
+	"strings"
+
 	"github.com/prymitive/karma/internal/alertmanager"
 	"github.com/prymitive/karma/internal/filters"
 	"github.com/prymitive/karma/internal/models"
@@ -33,15 +36,23 @@ func countLabel(countStore models.LabelsCountMap, key string, val string) {
 func getUpstreams() models.AlertmanagerAPISummary {
 	summary := models.AlertmanagerAPISummary{}
 
+	clusters := map[string][]string{}
 	upstreams := alertmanager.GetAlertmanagers()
 	for _, upstream := range upstreams {
+		members := upstream.ClusterMemberNames()
+		sort.Strings(members)
+		key := strings.Join(members[:], "\n")
+		if _, found := clusters[key]; !found {
+			clusters[key] = members
+		}
+
 		u := models.AlertmanagerAPIStatus{
 			Name:           upstream.Name,
 			URI:            upstream.SanitizedURI(),
 			PublicURI:      upstream.PublicURI(),
 			Error:          upstream.Error(),
 			Version:        upstream.Version(),
-			ClusterMembers: upstream.ClusterMemberNames(),
+			ClusterMembers: members,
 		}
 		summary.Instances = append(summary.Instances, u)
 
@@ -53,5 +64,9 @@ func getUpstreams() models.AlertmanagerAPISummary {
 		}
 	}
 
+	for _, cluster := range clusters {
+		summary.Clusters = append(summary.Clusters, cluster)
+	}
+
 	return summary
 }
diff --git a/internal/models/alertmanager.go b/internal/models/alertmanager.go
index d40087a91..718322822 100644
--- a/internal/models/alertmanager.go
+++ b/internal/models/alertmanager.go
@@ -47,4 +47,5 @@ type AlertmanagerAPICounters struct {
 type AlertmanagerAPISummary struct {
 	Counters  AlertmanagerAPICounters `json:"counters"`
 	Instances []AlertmanagerAPIStatus `json:"instances"`
+	Clusters  [][]string              `json:"clusters"`
 }