99a48d8310
The current structure is a remnant of when the in memory storage was one of the options for backing store. Today, we always have the memory storage with an optional "backend storage" plugin. This commit makes the InMemoryStorage use explicit.
98 lines
3.1 KiB
Go
98 lines
3.1 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"flag"
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"fmt"
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"os"
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"time"
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"github.com/golang/glog"
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"github.com/google/cadvisor/manager"
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"github.com/google/cadvisor/storage"
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"github.com/google/cadvisor/storage/bigquery"
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"github.com/google/cadvisor/storage/influxdb"
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"github.com/google/cadvisor/storage/memory"
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)
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var argDbUsername = flag.String("storage_driver_user", "root", "database username")
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var argDbPassword = flag.String("storage_driver_password", "root", "database password")
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var argDbHost = flag.String("storage_driver_host", "localhost:8086", "database host:port")
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var argDbName = flag.String("storage_driver_db", "cadvisor", "database name")
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var argDbTable = flag.String("storage_driver_table", "stats", "table name")
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var argDbIsSecure = flag.Bool("storage_driver_secure", false, "use secure connection with database")
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var argDbBufferDuration = flag.Duration("storage_driver_buffer_duration", 60*time.Second, "Writes in the storage driver will be buffered for this duration, and committed to the non memory backends as a single transaction")
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const statsRequestedByUI = 60
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// Creates a memory storage with an optional backend storage option.
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func NewMemoryStorage(backendStorageName string) (*memory.InMemoryStorage, error) {
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var storageDriver *memory.InMemoryStorage
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var backendStorage storage.StorageDriver
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var err error
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// TODO(vmarmol): We shouldn't need the housekeeping interval here and it shouldn't be public.
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statsToCache := int(*argDbBufferDuration / *manager.HousekeepingInterval)
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if statsToCache < statsRequestedByUI {
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// The UI requests the most recent 60 stats by default.
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statsToCache = statsRequestedByUI
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}
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switch backendStorageName {
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case "":
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backendStorage = nil
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case "influxdb":
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var hostname string
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hostname, err = os.Hostname()
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if err != nil {
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return nil, err
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}
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backendStorage, err = influxdb.New(
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hostname,
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*argDbTable,
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*argDbName,
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*argDbUsername,
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*argDbPassword,
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*argDbHost,
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*argDbIsSecure,
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*argDbBufferDuration,
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)
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case "bigquery":
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var hostname string
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hostname, err = os.Hostname()
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if err != nil {
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return nil, err
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}
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backendStorage, err = bigquery.New(
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hostname,
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*argDbTable,
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*argDbName,
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)
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default:
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err = fmt.Errorf("unknown backend storage driver: %v", *argDbDriver)
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}
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if err != nil {
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return nil, err
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}
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if backendStorageName != "" {
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glog.Infof("Using backend storage type %q", backendStorageName)
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} else {
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glog.Infof("No backend storage selected")
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}
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glog.Info("Caching %d stats in memory", statsToCache)
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storageDriver = memory.New(statsToCache, backendStorage)
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return storageDriver, nil
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}
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