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contour.go
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contour.go
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// Copyright © 2019 VMware
// 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 main
import (
"fmt"
"os"
resource "github.com/envoyproxy/go-control-plane/pkg/resource/v2"
"github.com/projectcontour/contour/internal/build"
"github.com/projectcontour/contour/internal/envoy"
"github.com/sirupsen/logrus"
kingpin "gopkg.in/alecthomas/kingpin.v2"
"k8s.io/klog"
)
func init() {
// even though we don't use it directly, some of our dependencies use klog
// so we must initialize it here to ensure that klog is set to log to stderr
// and not to a file.
// yes, this is gross, the klog authors are monsters.
klog.InitFlags(nil)
}
func main() {
log := logrus.StandardLogger()
app := kingpin.New("contour", "Contour Kubernetes ingress controller.")
app.HelpFlag.Short('h')
envoyCmd := app.Command("envoy", "Sub-command for envoy actions.")
shutdownManager, shutdownManagerCtx := registerShutdownManager(envoyCmd, log)
bootstrap, bootstrapCtx := registerBootstrap(app)
certgenApp, certgenConfig := registerCertGen(app)
cli := app.Command("cli", "A CLI client for the Contour Kubernetes ingress controller.")
var client Client
cli.Flag("contour", "Contour host:port.").Default("127.0.0.1:8001").StringVar(&client.ContourAddr)
cli.Flag("cafile", "CA bundle file for connecting to a TLS-secured Contour.").Envar("CLI_CAFILE").StringVar(&client.CAFile)
cli.Flag("cert-file", "Client certificate file for connecting to a TLS-secured Contour.").Envar("CLI_CERT_FILE").StringVar(&client.ClientCert)
cli.Flag("key-file", "Client key file for connecting to a TLS-secured Contour.").Envar("CLI_KEY_FILE").StringVar(&client.ClientKey)
var resources []string
cds := cli.Command("cds", "Watch services.")
cds.Arg("resources", "CDS resource filter").StringsVar(&resources)
eds := cli.Command("eds", "Watch endpoints.")
eds.Arg("resources", "EDS resource filter").StringsVar(&resources)
lds := cli.Command("lds", "Watch listeners.")
lds.Arg("resources", "LDS resource filter").StringsVar(&resources)
rds := cli.Command("rds", "Watch routes.")
rds.Arg("resources", "RDS resource filter").StringsVar(&resources)
sds := cli.Command("sds", "Watch secrets.")
sds.Arg("resources", "SDS resource filter").StringsVar(&resources)
serve, serveCtx := registerServe(app)
version := app.Command("version", "Build information for Contour.")
args := os.Args[1:]
switch kingpin.MustParse(app.Parse(args)) {
case shutdownManager.FullCommand():
doShutdownManager(shutdownManagerCtx)
case bootstrap.FullCommand():
check(envoy.WriteBootstrap(bootstrapCtx))
case certgenApp.FullCommand():
doCertgen(certgenConfig)
case cds.FullCommand():
stream := client.ClusterStream()
watchstream(stream, resource.ClusterType, resources)
case eds.FullCommand():
stream := client.EndpointStream()
watchstream(stream, resource.EndpointType, resources)
case lds.FullCommand():
stream := client.ListenerStream()
watchstream(stream, resource.ListenerType, resources)
case rds.FullCommand():
stream := client.RouteStream()
watchstream(stream, resource.RouteType, resources)
case sds.FullCommand():
stream := client.RouteStream()
watchstream(stream, resource.SecretType, resources)
case serve.FullCommand():
// parse args a second time so cli flags are applied
// on top of any values sourced from -c's config file.
_, err := app.Parse(args)
check(err)
if serveCtx.Debug {
log.SetLevel(logrus.DebugLevel)
}
log.Infof("args: %v", args)
check(doServe(log, serveCtx))
case version.FullCommand():
println(build.PrintBuildInfo())
default:
app.Usage(args)
os.Exit(2)
}
}
func check(err error) {
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}