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
|
// Copyright 2023 The Prometheus Authors
// 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.
package collector
import (
"encoding/json"
"fmt"
"io"
"log/slog"
"net/http"
"net/url"
"path"
"github.com/prometheus/client_golang/prometheus"
)
var (
ilmStatuses = []string{"STOPPED", "RUNNING", "STOPPING"}
)
type ilmStatusMetric struct {
Type prometheus.ValueType
Desc *prometheus.Desc
Value func(ilm *IlmStatusResponse, status string) float64
Labels func(status string) []string
}
// IlmStatusCollector information struct
type IlmStatusCollector struct {
logger *slog.Logger
client *http.Client
url *url.URL
metric ilmStatusMetric
}
type IlmStatusResponse struct {
OperationMode string `json:"operation_mode"`
}
// NewIlmStatus defines Indices IndexIlms Prometheus metrics
func NewIlmStatus(logger *slog.Logger, client *http.Client, url *url.URL) *IlmStatusCollector {
subsystem := "ilm"
return &IlmStatusCollector{
logger: logger,
client: client,
url: url,
metric: ilmStatusMetric{
Type: prometheus.GaugeValue,
Desc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "status"),
"Current status of ILM. Status can be STOPPED, RUNNING, STOPPING.",
[]string{"operation_mode"}, nil,
),
Value: func(ilm *IlmStatusResponse, status string) float64 {
if ilm.OperationMode == status {
return 1
}
return 0
},
},
}
}
// Describe add Snapshots metrics descriptions
func (im *IlmStatusCollector) Describe(ch chan<- *prometheus.Desc) {
ch <- im.metric.Desc
}
func (im *IlmStatusCollector) fetchAndDecodeIlm() (*IlmStatusResponse, error) {
u := *im.url
u.Path = path.Join(im.url.Path, "/_ilm/status")
res, err := im.client.Get(u.String())
if err != nil {
return nil, fmt.Errorf("failed to get from %s://%s:%s%s: %s",
u.Scheme, u.Hostname(), u.Port(), u.Path, err)
}
if res.StatusCode != http.StatusOK {
return nil, fmt.Errorf("HTTP Request failed with code %d", res.StatusCode)
}
body, err := io.ReadAll(res.Body)
if err != nil {
im.logger.Warn("failed to read response body", "err", err)
return nil, err
}
err = res.Body.Close()
if err != nil {
im.logger.Warn("failed to close response body", "err", err)
return nil, err
}
var imr IlmStatusResponse
if err := json.Unmarshal(body, &imr); err != nil {
return nil, err
}
return &imr, nil
}
// Collect gets all indices Ilms metric values
func (im *IlmStatusCollector) Collect(ch chan<- prometheus.Metric) {
indicesIlmsResponse, err := im.fetchAndDecodeIlm()
if err != nil {
im.logger.Warn(
"failed to fetch and decode cluster ilm status",
"err", err,
)
return
}
for _, status := range ilmStatuses {
ch <- prometheus.MustNewConstMetric(
im.metric.Desc,
im.metric.Type,
im.metric.Value(indicesIlmsResponse, status),
status,
)
}
}
|
