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stats.go
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stats.go
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/*
Copyright 2021 Mirantis
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 core
import (
"context"
"github.com/sirupsen/logrus"
"sync"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
)
// ContainerStats returns stats for a container stats request based on container id.
func (ds *dockerService) ContainerStats(
_ context.Context,
r *runtimeapi.ContainerStatsRequest,
) (*runtimeapi.ContainerStatsResponse, error) {
stats, err := ds.getContainerStats(r.ContainerId)
if err != nil {
return nil, err
}
return &runtimeapi.ContainerStatsResponse{Stats: stats}, nil
}
// ListContainerStats returns stats for a list container stats request based on a filter.
func (ds *dockerService) ListContainerStats(
ctx context.Context,
r *runtimeapi.ListContainerStatsRequest,
) (*runtimeapi.ListContainerStatsResponse, error) {
containerStatsFilter := r.GetFilter()
filter := &runtimeapi.ContainerFilter{}
if containerStatsFilter != nil {
filter.Id = containerStatsFilter.Id
filter.PodSandboxId = containerStatsFilter.PodSandboxId
filter.LabelSelector = containerStatsFilter.LabelSelector
}
listResp, err := ds.ListContainers(ctx, &runtimeapi.ListContainersRequest{Filter: filter})
if err != nil {
return nil, err
}
var mtx sync.Mutex
var wg sync.WaitGroup
var stats = make([]*runtimeapi.ContainerStats, 0, len(listResp.Containers))
for _, container := range listResp.Containers {
go func() {
wg.Add(1)
defer wg.Done()
if containerStats, err := ds.getContainerStats(container.Id); err == nil && containerStats != nil {
mtx.Lock()
stats = append(stats, containerStats)
mtx.Unlock()
} else if err != nil {
logrus.Error(err, "Failed to get stats from container "+container.Id)
}
}()
}
wg.Wait()
return &runtimeapi.ListContainerStatsResponse{Stats: stats}, nil
}