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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 stdout
import (
"bytes"
"fmt"
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/storage"
)
func init() {
storage.RegisterStorageDriver("stdout", new)
}
type stdoutStorage struct {
Namespace string
}
const (
colCpuCumulativeUsage = "cpu_cumulative_usage"
// Memory Usage
colMemoryUsage = "memory_usage"
// Working set size
colMemoryWorkingSet = "memory_working_set"
// Cumulative count of bytes received.
colRxBytes = "rx_bytes"
// Cumulative count of receive errors encountered.
colRxErrors = "rx_errors"
// Cumulative count of bytes transmitted.
colTxBytes = "tx_bytes"
// Cumulative count of transmit errors encountered.
colTxErrors = "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.ArgDbHost)
}
func (driver *stdoutStorage) 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 (driver *stdoutStorage) 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
}
}
func (driver *stdoutStorage) AddStats(ref info.ContainerReference, stats *info.ContainerStats) error {
if stats == nil {
return nil
}
containerName := ref.Name
if len(ref.Aliases) > 0 {
containerName = ref.Aliases[0]
}
var buffer bytes.Buffer
buffer.WriteString(fmt.Sprintf("cName=%s host=%s", containerName, driver.Namespace))
series := driver.containerStatsToValues(stats)
driver.containerFsStatsToValues(&series, stats)
for key, value := range series {
buffer.WriteString(fmt.Sprintf(" %s=%v", key, value))
}
_, err := fmt.Println(buffer.String())
return err
}
func (driver *stdoutStorage) Close() error {
return nil
}
func newStorage(namespace string) (*stdoutStorage, error) {
stdoutStorage := &stdoutStorage{
Namespace: namespace,
}
return stdoutStorage, nil
}
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