forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
kubelet_metrics.go
181 lines (166 loc) · 11.6 KB
/
kubelet_metrics.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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
Copyright 2015 The Kubernetes Authors All rights reserved.
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 metrics
import (
"fmt"
"io/ioutil"
"net/http"
"time"
"k8s.io/kubernetes/pkg/util/sets"
"github.com/prometheus/common/model"
)
var NecessaryKubeletMetrics = map[string][]string{
"cadvisor_version_info": {"cadvisorRevision", "cadvisorVersion", "dockerVersion", "kernelVersion", "osVersion"},
"container_cpu_system_seconds_total": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_cpu_usage_seconds_total": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name", "cpu"},
"container_cpu_user_seconds_total": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_io_current": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_io_time_seconds_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_io_time_weighted_seconds_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_limit_bytes": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_read_seconds_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_reads_merged_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_reads_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_sector_reads_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_sector_writes_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_usage_bytes": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_write_seconds_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_writes_merged_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_fs_writes_total": {"device", "id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_last_seen": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_memory_cache": {},
"container_memory_rss": {},
"container_memory_failcnt": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_memory_failures_total": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name", "scope", "type"},
"container_memory_usage_bytes": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_memory_working_set_bytes": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_receive_bytes_total": {"id", "interface", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_receive_errors_total": {"id", "image", "interface", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_receive_packets_dropped_total": {"id", "image", "interface", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_receive_packets_total": {"id", "image", "interface", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_transmit_bytes_total": {"id", "interface", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_transmit_errors_total": {"id", "interface", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_transmit_packets_dropped_total": {"id", "interface", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_network_transmit_packets_total": {"id", "interface", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_scrape_error": {},
"container_spec_cpu_period": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_spec_cpu_shares": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_spec_memory_limit_bytes": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_spec_memory_swap_limit_bytes": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_start_time_seconds": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name"},
"container_tasks_state": {"id", "image", "kubernetes_container_name", "kubernetes_namespace", "kubernetes_pod_name", "name", "state"},
"kubelet_container_manager_latency_microseconds": {"operation_type", "quantile"},
"kubelet_container_manager_latency_microseconds_count": {"operation_type"},
"kubelet_container_manager_latency_microseconds_sum": {"operation_type"},
"kubelet_containers_per_pod_count": {"quantile"},
"kubelet_containers_per_pod_count_count": {},
"kubelet_containers_per_pod_count_sum": {},
"kubelet_docker_operations": {"operation_type"},
"kubelet_docker_operations_errors": {"operation_type"},
"kubelet_docker_operations_timeout": {"operation_type"},
"kubelet_docker_operations_latency_microseconds": {"operation_type", "quantile"},
"kubelet_docker_operations_latency_microseconds_count": {"operation_type"},
"kubelet_docker_operations_latency_microseconds_sum": {"operation_type"},
"kubelet_generate_pod_status_latency_microseconds": {"quantile"},
"kubelet_generate_pod_status_latency_microseconds_count": {},
"kubelet_generate_pod_status_latency_microseconds_sum": {},
"kubelet_pleg_relist_latency_microseconds": {"quantile"},
"kubelet_pleg_relist_latency_microseconds_sum": {},
"kubelet_pleg_relist_latency_microseconds_count": {},
"kubelet_pleg_relist_interval_microseconds": {"quantile"},
"kubelet_pleg_relist_interval_microseconds_sum": {},
"kubelet_pleg_relist_interval_microseconds_count": {},
"kubelet_pod_start_latency_microseconds": {"quantile"},
"kubelet_pod_start_latency_microseconds_count": {},
"kubelet_pod_start_latency_microseconds_sum": {},
"kubelet_pod_worker_latency_microseconds": {"operation_type", "quantile"},
"kubelet_pod_worker_latency_microseconds_count": {"operation_type"},
"kubelet_pod_worker_latency_microseconds_sum": {"operation_type"},
"kubelet_pod_worker_start_latency_microseconds": {"quantile"},
"kubelet_pod_worker_start_latency_microseconds_count": {},
"kubelet_pod_worker_start_latency_microseconds_sum": {},
"kubelet_running_container_count": {},
"kubelet_running_pod_count": {},
"kubelet_sync_pods_latency_microseconds": {"quantile"},
"kubelet_sync_pods_latency_microseconds_count": {},
"kubelet_sync_pods_latency_microseconds_sum": {},
"machine_cpu_cores": {},
"machine_memory_bytes": {},
"rest_client_request_latency_microseconds": {"quantile", "url", "verb"},
"rest_client_request_latency_microseconds_count": {"url", "verb"},
"rest_client_request_latency_microseconds_sum": {"url", "verb"},
"rest_client_request_status_codes": {"code", "host", "method"},
}
var KubeletMetricsLabelsToSkip = sets.NewString(
"kubernetes_namespace",
"image",
"name",
)
type KubeletMetrics Metrics
func (m *KubeletMetrics) Equal(o KubeletMetrics) bool {
return (*Metrics)(m).Equal(Metrics(o))
}
func NewKubeletMetrics() KubeletMetrics {
result := NewMetrics()
for metric := range NecessaryKubeletMetrics {
result[metric] = make(model.Samples, 0)
}
return KubeletMetrics(result)
}
// GrabKubeletMetricsWithoutProxy retrieve metrics from the kubelet on the given node using a simple GET over http.
// Currently only used in integration tests.
func GrabKubeletMetricsWithoutProxy(nodeName string) (KubeletMetrics, error) {
metricsEndpoint := "http://%s/metrics"
resp, err := http.Get(fmt.Sprintf(metricsEndpoint, nodeName))
if err != nil {
return KubeletMetrics{}, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return KubeletMetrics{}, err
}
return parseKubeletMetrics(string(body))
}
func parseKubeletMetrics(data string) (KubeletMetrics, error) {
result := NewKubeletMetrics()
if err := parseMetrics(data, NecessaryKubeletMetrics, (*Metrics)(&result), nil); err != nil {
return KubeletMetrics{}, err
}
return result, nil
}
func (g *MetricsGrabber) getMetricsFromNode(nodeName string, kubeletPort int) (string, error) {
// There's a problem with timing out during proxy. Wrapping this in a goroutine to prevent deadlock.
// Hanging goroutine will be leaked.
finished := make(chan struct{})
var err error
var rawOutput []byte
go func() {
rawOutput, err = g.client.Get().
Prefix("proxy").
Resource("nodes").
Name(fmt.Sprintf("%v:%v", nodeName, kubeletPort)).
Suffix("metrics").
Do().Raw()
finished <- struct{}{}
}()
select {
case <-time.After(ProxyTimeout):
return "", fmt.Errorf("Timed out when waiting for proxy to gather metrics from %v", nodeName)
case <-finished:
if err != nil {
return "", err
}
return string(rawOutput), nil
}
}