-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
service_node.go
155 lines (141 loc) · 4.13 KB
/
service_node.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
package consul
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
)
// getServiceNodesLabels returns labels for Consul service nodes with given cfg.
func getServiceNodesLabels(cfg *apiConfig) []*promutils.Labels {
sns := cfg.consulWatcher.getServiceNodesSnapshot()
var ms []*promutils.Labels
for svc, sn := range sns {
for i := range sn {
ms = sn[i].appendTargetLabels(ms, svc, cfg.tagSeparator)
}
}
return ms
}
// ServiceNode is Consul service node.
//
// See https://www.consul.io/api/health.html#list-nodes-for-service
type ServiceNode struct {
Service Service
Node Node
Checks []Check
}
// Service is Consul service.
//
// See https://www.consul.io/api/health.html#list-nodes-for-service
type Service struct {
ID string
Service string
Address string
Namespace string
Partition string
Port int
Tags []string
Meta map[string]string
TaggedAddresses map[string]ServiceTaggedAddress
Datacenter string
}
// ServiceTaggedAddress is Consul service.
//
// See https://www.consul.io/api/health.html#list-nodes-for-service
type ServiceTaggedAddress struct {
Address string
Port int
}
// Node is Consul node.
//
// See https://www.consul.io/api/health.html#list-nodes-for-service
type Node struct {
Address string
Datacenter string
Node string
Meta map[string]string
TaggedAddresses map[string]string
}
// Check is Consul check.
//
// See https://www.consul.io/api/health.html#list-nodes-for-service
type Check struct {
CheckID string
Status string
}
// ParseServiceNodes return parsed slice of ServiceNode by data.
func ParseServiceNodes(data []byte) ([]ServiceNode, error) {
var sns []ServiceNode
if err := json.Unmarshal(data, &sns); err != nil {
return nil, fmt.Errorf("cannot unmarshal ServiceNodes from %q: %w", data, err)
}
return sns, nil
}
func (sn *ServiceNode) appendTargetLabels(ms []*promutils.Labels, serviceName, tagSeparator string) []*promutils.Labels {
var addr string
if sn.Service.Address != "" {
addr = discoveryutils.JoinHostPort(sn.Service.Address, sn.Service.Port)
} else {
addr = discoveryutils.JoinHostPort(sn.Node.Address, sn.Service.Port)
}
m := promutils.NewLabels(16)
m.Add("__address__", addr)
m.Add("__meta_consul_address", sn.Node.Address)
m.Add("__meta_consul_dc", sn.Node.Datacenter)
m.Add("__meta_consul_health", AggregatedStatus(sn.Checks))
m.Add("__meta_consul_namespace", sn.Service.Namespace)
m.Add("__meta_consul_partition", sn.Service.Partition)
m.Add("__meta_consul_node", sn.Node.Node)
m.Add("__meta_consul_service", serviceName)
m.Add("__meta_consul_service_address", sn.Service.Address)
m.Add("__meta_consul_service_id", sn.Service.ID)
m.Add("__meta_consul_service_port", strconv.Itoa(sn.Service.Port))
discoveryutils.AddTagsToLabels(m, sn.Service.Tags, "__meta_consul_", tagSeparator)
for k, v := range sn.Node.Meta {
m.Add(discoveryutils.SanitizeLabelName("__meta_consul_metadata_"+k), v)
}
for k, v := range sn.Service.Meta {
m.Add(discoveryutils.SanitizeLabelName("__meta_consul_service_metadata_"+k), v)
}
for k, v := range sn.Node.TaggedAddresses {
m.Add(discoveryutils.SanitizeLabelName("__meta_consul_tagged_address_"+k), v)
}
ms = append(ms, m)
return ms
}
// AggregatedStatus returns aggregated status of service node checks.
func AggregatedStatus(checks []Check) string {
// The code has been copy-pasted from HealthChecks.AggregatedStatus in Consul
var passing, warning, critical, maintenance bool
for _, check := range checks {
id := check.CheckID
if id == "_node_maintenance" || strings.HasPrefix(id, "_service_maintenance:") {
maintenance = true
continue
}
switch check.Status {
case "passing":
passing = true
case "warning":
warning = true
case "critical":
critical = true
default:
return ""
}
}
switch {
case maintenance:
return "maintenance"
case critical:
return "critical"
case warning:
return "warning"
case passing:
return "passing"
default:
return "passing"
}
}