1a24eed18f
The cache will now hold atlest the minimum number of stats required by the UI and more if the buffer duration is longer than the default. Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
85 lines
2.8 KiB
Go
85 lines
2.8 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/cache"
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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 argSampleSize = flag.Int("samples", 1024, "number of samples we want to keep")
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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 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 bufferd 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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func NewStorageDriver(driverName string) (storage.StorageDriver, error) {
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var storageDriver storage.StorageDriver
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var err error
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switch driverName {
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case "":
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// empty string by default is the in memory store
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fallthrough
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case "memory":
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storageDriver = memory.New(*argSampleSize, int(*argDbBufferDuration))
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return storageDriver, 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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storageDriver, err = influxdb.New(
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hostname,
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"stats",
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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*time.Second,
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// TODO(monnand): One hour? Or user-defined?
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1*time.Hour,
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)
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samplesToCache := int(*argDbBufferDuration / manager.HousekeepingTick)
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if samplesToCache < statsRequestedByUI {
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// The UI requests the most recent 60 stats by default.
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samplesToCache = statsRequestedByUI
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}
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glog.V(2).Infof("Caching %d recent stats in memory\n", samplesToCache)
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storageDriver = cache.MemoryCache(samplesToCache, samplesToCache, storageDriver)
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default:
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err = fmt.Errorf("Unknown database 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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return storageDriver, nil
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}
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