eeea467d66
We scale with the number of containers (and cores on the machine) so we should be able to use more than just one core (the default).
118 lines
3.3 KiB
Go
118 lines
3.3 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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"net/http"
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"runtime"
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"github.com/golang/glog"
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"github.com/google/cadvisor/api"
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"github.com/google/cadvisor/container/docker"
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"github.com/google/cadvisor/container/raw"
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"github.com/google/cadvisor/info"
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"github.com/google/cadvisor/manager"
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"github.com/google/cadvisor/pages"
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"github.com/google/cadvisor/pages/static"
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)
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var argPort = flag.Int("port", 8080, "port to listen")
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var maxProcs = flag.Int("max_procs", 0, "max number of CPUs that can be used simultaneously. Less than 1 for default (number of cores).")
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var argDbDriver = flag.String("storage_driver", "memory", "storage driver to use. Options are: memory (default) and influxdb")
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func main() {
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flag.Parse()
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setMaxProcs()
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storageDriver, err := NewStorageDriver(*argDbDriver)
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if err != nil {
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glog.Fatalf("Failed to connect to database: %s", err)
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}
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containerManager, err := manager.New(storageDriver)
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if err != nil {
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glog.Fatalf("Failed to create a Container Manager: %s", err)
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}
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// Register Docker.
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if err := docker.Register(containerManager); err != nil {
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glog.Errorf("Docker registration failed: %v.", err)
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}
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// Register the raw driver.
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if err := raw.Register(containerManager); err != nil {
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glog.Fatalf("raw registration failed: %v.", err)
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}
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// Handler for static content.
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http.HandleFunc(static.StaticResource, func(w http.ResponseWriter, r *http.Request) {
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err := static.HandleRequest(w, r.URL)
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if err != nil {
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fmt.Fprintf(w, "%s", err)
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}
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})
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// Register API handler.
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if err := api.RegisterHandlers(containerManager); err != nil {
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glog.Fatalf("failed to register API handlers: %s", err)
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}
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// Redirect / to containers page.
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http.Handle("/", http.RedirectHandler(pages.ContainersPage, http.StatusTemporaryRedirect))
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// Register the handler for the containers page.
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http.HandleFunc(pages.ContainersPage, func(w http.ResponseWriter, r *http.Request) {
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err := pages.ServerContainersPage(containerManager, w, r.URL)
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if err != nil {
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fmt.Fprintf(w, "%s", err)
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}
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})
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defer glog.Flush()
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go func() {
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glog.Fatal(containerManager.Start())
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}()
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glog.Infof("Starting cAdvisor version: %q", info.VERSION)
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glog.Infof("About to serve on port ", *argPort)
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addr := fmt.Sprintf(":%v", *argPort)
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glog.Fatal(http.ListenAndServe(addr, nil))
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}
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func setMaxProcs() {
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// TODO(vmarmol): Consider limiting if we have a CPU mask in effect.
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// Allow as many threads as we have cores unless the user specified a value.
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var numProcs int
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if *maxProcs < 1 {
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numProcs = runtime.NumCPU()
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} else {
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numProcs = *maxProcs
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}
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runtime.GOMAXPROCS(numProcs)
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// Check if the setting was successful.
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actualNumProcs := runtime.GOMAXPROCS(0)
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if actualNumProcs != numProcs {
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glog.Warningf("Specified max procs of %v but using %v", numProcs, actualNumProcs)
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}
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}
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