a123fd72d8
Docker does not provide the rootfs path through docker inspect or statefile and the path is dependent on the storage driver being used. Instead of enumerating the storage drivers, we pick a pid from the container and get the config from /proc/pid/root. Although a bit expensive, this method works for non-docker containers too.
101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
// Copyright 2015 Google Inc. 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 collector
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/google/cadvisor/info/v1"
|
|
)
|
|
|
|
const metricLabelPrefix = "io.cadvisor.metric."
|
|
|
|
type GenericCollectorManager struct {
|
|
Collectors []*collectorData
|
|
NextCollectionTime time.Time
|
|
}
|
|
|
|
type collectorData struct {
|
|
collector Collector
|
|
nextCollectionTime time.Time
|
|
}
|
|
|
|
// Returns a new CollectorManager that is thread-compatible.
|
|
func NewCollectorManager() (CollectorManager, error) {
|
|
return &GenericCollectorManager{
|
|
Collectors: []*collectorData{},
|
|
NextCollectionTime: time.Now(),
|
|
}, nil
|
|
}
|
|
|
|
func GetCollectorConfigs(labels map[string]string) map[string]string {
|
|
configs := map[string]string{}
|
|
for k, v := range labels {
|
|
if strings.HasPrefix(k, metricLabelPrefix) {
|
|
name := strings.TrimPrefix(k, metricLabelPrefix)
|
|
configs[name] = v
|
|
}
|
|
}
|
|
return configs
|
|
}
|
|
|
|
func (cm *GenericCollectorManager) RegisterCollector(collector Collector) error {
|
|
cm.Collectors = append(cm.Collectors, &collectorData{
|
|
collector: collector,
|
|
nextCollectionTime: time.Now(),
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func (cm *GenericCollectorManager) Collect() (time.Time, []v1.Metric, error) {
|
|
var errors []error
|
|
|
|
// Collect from all collectors that are ready.
|
|
var next time.Time
|
|
var metrics []v1.Metric
|
|
for _, c := range cm.Collectors {
|
|
if c.nextCollectionTime.Before(time.Now()) {
|
|
nextCollection, newMetrics, err := c.collector.Collect()
|
|
if err != nil {
|
|
errors = append(errors, err)
|
|
}
|
|
metrics = append(metrics, newMetrics...)
|
|
c.nextCollectionTime = nextCollection
|
|
}
|
|
|
|
// Keep track of the next collector that will be ready.
|
|
if next.IsZero() || next.After(c.nextCollectionTime) {
|
|
next = c.nextCollectionTime
|
|
}
|
|
}
|
|
cm.NextCollectionTime = next
|
|
return next, metrics, compileErrors(errors)
|
|
}
|
|
|
|
// Make an error slice into a single error.
|
|
func compileErrors(errors []error) error {
|
|
if len(errors) == 0 {
|
|
return nil
|
|
}
|
|
|
|
res := make([]string, len(errors))
|
|
for i := range errors {
|
|
res[i] = fmt.Sprintf("Error %d: %v", i, errors[i].Error())
|
|
}
|
|
return fmt.Errorf("%s", strings.Join(res, ","))
|
|
}
|