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statsd.go
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statsd.go
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// 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 statsd
import (
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/storage"
client "github.com/google/cadvisor/storage/statsd/client"
)
func init() {
storage.RegisterStorageDriver("statsd", new)
}
type statsdStorage struct {
client *client.Client
Namespace string
}
const (
colCpuCumulativeUsage string = "cpu_cumulative_usage"
// Memory Usage
colMemoryUsage string = "memory_usage"
// Working set size
colMemoryWorkingSet string = "memory_working_set"
// Cumulative count of bytes received.
colRxBytes string = "rx_bytes"
// Cumulative count of receive errors encountered.
colRxErrors string = "rx_errors"
// Cumulative count of bytes transmitted.
colTxBytes string = "tx_bytes"
// Cumulative count of transmit errors encountered.
colTxErrors string = "tx_errors"
// Filesystem summary
colFsSummary = "fs_summary"
// Filesystem limit.
colFsLimit = "fs_limit"
// Filesystem usage.
colFsUsage = "fs_usage"
)
func new() (storage.StorageDriver, error) {
return newStorage(*storage.ArgDbName, *storage.ArgDbHost)
}
func (self *statsdStorage) containerStatsToValues(
stats *info.ContainerStats,
) (series map[string]uint64) {
series = make(map[string]uint64)
// Cumulative Cpu Usage
series[colCpuCumulativeUsage] = stats.Cpu.Usage.Total
// Memory Usage
series[colMemoryUsage] = stats.Memory.Usage
// Working set size
series[colMemoryWorkingSet] = stats.Memory.WorkingSet
// Network stats.
series[colRxBytes] = stats.Network.RxBytes
series[colRxErrors] = stats.Network.RxErrors
series[colTxBytes] = stats.Network.TxBytes
series[colTxErrors] = stats.Network.TxErrors
return series
}
func (self *statsdStorage) containerFsStatsToValues(
series *map[string]uint64,
stats *info.ContainerStats,
) {
for _, fsStat := range stats.Filesystem {
// Summary stats.
(*series)[colFsSummary+"."+colFsLimit] += fsStat.Limit
(*series)[colFsSummary+"."+colFsUsage] += fsStat.Usage
// Per device stats.
(*series)[fsStat.Device+"."+colFsLimit] = fsStat.Limit
(*series)[fsStat.Device+"."+colFsUsage] = fsStat.Usage
}
}
//Push the data into redis
func (self *statsdStorage) AddStats(ref info.ContainerReference, stats *info.ContainerStats) error {
if stats == nil {
return nil
}
var containerName string
if len(ref.Aliases) > 0 {
containerName = ref.Aliases[0]
} else {
containerName = ref.Name
}
series := self.containerStatsToValues(stats)
self.containerFsStatsToValues(&series, stats)
for key, value := range series {
err := self.client.Send(self.Namespace, containerName, key, value)
if err != nil {
return err
}
}
return nil
}
func (self *statsdStorage) Close() error {
self.client.Close()
self.client = nil
return nil
}
func newStorage(namespace, hostPort string) (*statsdStorage, error) {
statsdClient, err := client.New(hostPort)
if err != nil {
return nil, err
}
statsdStorage := &statsdStorage{
client: statsdClient,
Namespace: namespace,
}
return statsdStorage, nil
}