/
health.go
118 lines (94 loc) · 2.35 KB
/
health.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
//
// DISCLAIMER
//
// Copyright 2024 ArangoDB GmbH, Cologne, Germany
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Copyright holder is ArangoDB GmbH, Cologne, Germany
//
package svc
import (
"google.golang.org/grpc"
imHealth "google.golang.org/grpc/health"
pbHealth "google.golang.org/grpc/health/grpc_health_v1"
)
type HealthState int
const (
Unhealthy HealthState = iota
Degraded
Healthy
)
type HealthType int
const (
Readiness HealthType = iota
Liveness
Startup
)
type Health interface {
Update(key string, state HealthState)
}
type HealthService interface {
Service
Health
}
type emptyHealth struct {
}
func (e emptyHealth) Update(key string, state HealthState) {
}
type health struct {
*service
t HealthType
*imHealth.Server
}
func (h *health) Update(key string, state HealthState) {
healthState := pbHealth.HealthCheckResponse_UNKNOWN
switch h.t {
case Liveness:
switch state {
case Healthy, Degraded:
healthState = pbHealth.HealthCheckResponse_SERVING
case Unhealthy:
healthState = pbHealth.HealthCheckResponse_NOT_SERVING
}
case Startup, Readiness:
switch state {
case Healthy:
healthState = pbHealth.HealthCheckResponse_SERVING
case Degraded, Unhealthy:
healthState = pbHealth.HealthCheckResponse_NOT_SERVING
}
}
h.SetServingStatus(key, healthState)
h.SetServingStatus("", pbHealth.HealthCheckResponse_SERVING)
}
func (h *health) Name() string {
return "health"
}
func (h *health) Health() HealthState {
return Healthy
}
func (h *health) Register(registrar *grpc.Server) {
pbHealth.RegisterHealthServer(registrar, h)
}
func NewHealthService(cfg Configuration, t HealthType, handlers ...Handler) HealthService {
health := &health{
Server: imHealth.NewServer(),
t: t,
}
var h []Handler
h = append(h, health)
h = append(h, handlers...)
health.service = newService(cfg, h...)
return health
}