7ed645f004
Log failures encountered while dumping to influxdb Handle critical failures in cadvisor gracefully without getting stuck.
132 lines
3.7 KiB
Go
132 lines
3.7 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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_ "net/http/pprof"
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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/healthz"
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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", "", "storage driver to use. Empty means none. Options are: <empty> (default), bigquery, 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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// Basic health handler.
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if err := healthz.RegisterHandler(); err != nil {
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glog.Fatalf("failed to register healthz handler: %s", 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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errChan := make(chan error)
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go func() {
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errChan <- 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 %d", *argPort)
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addr := fmt.Sprintf(":%v", *argPort)
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go func() {
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errChan <- http.ListenAndServe(addr, nil)
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}()
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select {
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case err := <-errChan:
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glog.Fatal(err)
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}
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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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