/
container_stats_list.go
196 lines (172 loc) · 6.16 KB
/
container_stats_list.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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/*
Copyright The containerd 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 server
import (
"context"
"fmt"
"time"
"github.com/containerd/containerd/pkg/cri/store/stats"
tasks "github.com/containerd/containerd/api/services/tasks/v1"
"github.com/containerd/containerd/api/types"
runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
containerstore "github.com/containerd/containerd/pkg/cri/store/container"
)
// ListContainerStats returns stats of all running containers.
func (c *criService) ListContainerStats(
ctx context.Context,
in *runtime.ListContainerStatsRequest,
) (*runtime.ListContainerStatsResponse, error) {
request, containers, err := c.buildTaskMetricsRequest(in)
if err != nil {
return nil, fmt.Errorf("failed to build metrics request: %w", err)
}
resp, err := c.client.TaskService().Metrics(ctx, request)
if err != nil {
return nil, fmt.Errorf("failed to fetch metrics for tasks: %w", err)
}
criStats, err := c.toCRIContainerStats(resp.Metrics, containers)
if err != nil {
return nil, fmt.Errorf("failed to convert to cri containerd stats format: %w", err)
}
return criStats, nil
}
func (c *criService) toCRIContainerStats(
stats []*types.Metric,
containers []containerstore.Container,
) (*runtime.ListContainerStatsResponse, error) {
statsMap := make(map[string]*types.Metric)
for _, stat := range stats {
statsMap[stat.ID] = stat
}
containerStats := new(runtime.ListContainerStatsResponse)
for _, cntr := range containers {
cs, err := c.containerMetrics(cntr.Metadata, statsMap[cntr.ID])
if err != nil {
return nil, fmt.Errorf("failed to decode container metrics for %q: %w", cntr.ID, err)
}
if cs.Cpu != nil && cs.Cpu.UsageCoreNanoSeconds != nil {
// this is a calculated value and should be computed for all OSes
nanoUsage, err := c.getUsageNanoCores(cntr.Metadata.ID, false, cs.Cpu.UsageCoreNanoSeconds.Value, time.Unix(0, cs.Cpu.Timestamp))
if err != nil {
return nil, fmt.Errorf("failed to get usage nano cores, containerID: %s: %w", cntr.Metadata.ID, err)
}
cs.Cpu.UsageNanoCores = &runtime.UInt64Value{Value: nanoUsage}
}
containerStats.Stats = append(containerStats.Stats, cs)
}
return containerStats, nil
}
func (c *criService) getUsageNanoCores(containerID string, isSandbox bool, currentUsageCoreNanoSeconds uint64, currentTimestamp time.Time) (uint64, error) {
var oldStats *stats.ContainerStats
if isSandbox {
sandbox, err := c.sandboxStore.Get(containerID)
if err != nil {
return 0, fmt.Errorf("failed to get sandbox container: %s: %w", containerID, err)
}
oldStats = sandbox.Stats
} else {
container, err := c.containerStore.Get(containerID)
if err != nil {
return 0, fmt.Errorf("failed to get container ID: %s: %w", containerID, err)
}
oldStats = container.Stats
}
if oldStats == nil {
newStats := &stats.ContainerStats{
UsageCoreNanoSeconds: currentUsageCoreNanoSeconds,
Timestamp: currentTimestamp,
}
if isSandbox {
err := c.sandboxStore.UpdateContainerStats(containerID, newStats)
if err != nil {
return 0, fmt.Errorf("failed to update sandbox stats container ID: %s: %w", containerID, err)
}
} else {
err := c.containerStore.UpdateContainerStats(containerID, newStats)
if err != nil {
return 0, fmt.Errorf("failed to update container stats ID: %s: %w", containerID, err)
}
}
return 0, nil
}
nanoSeconds := currentTimestamp.UnixNano() - oldStats.Timestamp.UnixNano()
// zero or negative interval
if nanoSeconds <= 0 {
return 0, nil
}
newUsageNanoCores := uint64(float64(currentUsageCoreNanoSeconds-oldStats.UsageCoreNanoSeconds) /
float64(nanoSeconds) * float64(time.Second/time.Nanosecond))
newStats := &stats.ContainerStats{
UsageCoreNanoSeconds: currentUsageCoreNanoSeconds,
Timestamp: currentTimestamp,
}
if isSandbox {
err := c.sandboxStore.UpdateContainerStats(containerID, newStats)
if err != nil {
return 0, fmt.Errorf("failed to update sandbox container stats: %s: %w", containerID, err)
}
} else {
err := c.containerStore.UpdateContainerStats(containerID, newStats)
if err != nil {
return 0, fmt.Errorf("failed to update container stats ID: %s: %w", containerID, err)
}
}
return newUsageNanoCores, nil
}
func (c *criService) normalizeContainerStatsFilter(filter *runtime.ContainerStatsFilter) {
if cntr, err := c.containerStore.Get(filter.GetId()); err == nil {
filter.Id = cntr.ID
}
if sb, err := c.sandboxStore.Get(filter.GetPodSandboxId()); err == nil {
filter.PodSandboxId = sb.ID
}
}
// buildTaskMetricsRequest constructs a tasks.MetricsRequest based on
// the information in the stats request and the containerStore
func (c *criService) buildTaskMetricsRequest(
r *runtime.ListContainerStatsRequest,
) (*tasks.MetricsRequest, []containerstore.Container, error) {
req := &tasks.MetricsRequest{}
if r.GetFilter() == nil {
return req, c.containerStore.List(), nil
}
c.normalizeContainerStatsFilter(r.GetFilter())
var containers []containerstore.Container
for _, cntr := range c.containerStore.List() {
if r.GetFilter().GetId() != "" && cntr.ID != r.GetFilter().GetId() {
continue
}
if r.GetFilter().GetPodSandboxId() != "" && cntr.SandboxID != r.GetFilter().GetPodSandboxId() {
continue
}
if r.GetFilter().GetLabelSelector() != nil &&
!matchLabelSelector(r.GetFilter().GetLabelSelector(), cntr.Config.GetLabels()) {
continue
}
containers = append(containers, cntr)
req.Filters = append(req.Filters, "id=="+cntr.ID)
}
return req, containers, nil
}
func matchLabelSelector(selector, labels map[string]string) bool {
for k, v := range selector {
if val, ok := labels[k]; ok {
if v != val {
return false
}
} else {
return false
}
}
return true
}