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contour.go
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contour.go
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// Copyright Project Contour Authors
// 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 (
"os"
resource_v3 "github.com/envoyproxy/go-control-plane/pkg/resource/v3"
"github.com/projectcontour/contour/internal/build"
"github.com/projectcontour/contour/internal/envoy"
envoy_v3 "github.com/projectcontour/contour/internal/envoy/v3"
"github.com/projectcontour/contour/internal/k8s"
"github.com/sirupsen/logrus"
kingpin "gopkg.in/alecthomas/kingpin.v2"
)
func main() {
log := logrus.StandardLogger()
k8s.InitLogging(k8s.LogWriterOption(log.WithField("context", "kubernetes")))
// NOTE: when add a new subcommand, we'll have to remember to add it to 'TestOptionFlagsAreSorted'
// to ensure the option flags in lexicographic order.
app := kingpin.New("contour", "Contour Kubernetes ingress controller.")
app.HelpFlag.Short('h')
// Log-format applies to log format of all sub-commands.
logFormat := app.Flag("log-format", "Log output format for Contour. Either text or json.").Default("text").Enum("text", "json")
bootstrap, bootstrapCtx := registerBootstrap(app)
certgenApp, certgenConfig := registerCertGen(app)
cli, client := registerCli(app, log)
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)
envoyCmd := app.Command("envoy", "Sub-command for envoy actions.")
// Add a "shutdown" command which initiates an Envoy shutdown sequence.
sdmShutdown, sdmShutdownCtx := registerShutdown(envoyCmd, log)
sdm, shutdownManagerCtx := registerShutdownManager(envoyCmd, log)
gatewayProvisioner, gatewayProvisionerConfig := registerGatewayProvisioner(app)
serve, serveCtx := registerServe(app)
version := app.Command("version", "Build information for Contour.")
args := os.Args[1:]
cmd := kingpin.MustParse(app.Parse(args))
switch *logFormat {
case "text":
log.SetFormatter(&logrus.TextFormatter{})
case "json":
log.SetFormatter(&logrus.JSONFormatter{})
}
switch cmd {
case gatewayProvisioner.FullCommand():
runGatewayProvisioner(gatewayProvisionerConfig)
case sdm.FullCommand():
doShutdownManager(shutdownManagerCtx)
case sdmShutdown.FullCommand():
sdmShutdownCtx.shutdownHandler()
case bootstrap.FullCommand():
if err := bootstrapCtx.XDSResourceVersion.Validate(); err != nil {
log.WithError(err).Fatal("failed to parse bootstrap args")
}
if err := envoy.ValidAdminAddress(bootstrapCtx.AdminAddress); err != nil {
log.WithField("flag", "--admin-address").WithError(err).Fatal("failed to parse bootstrap args")
}
if err := envoy_v3.WriteBootstrap(bootstrapCtx); err != nil {
log.WithError(err).Fatal("failed to write bootstrap configuration")
}
case certgenApp.FullCommand():
doCertgen(certgenConfig, log)
case cds.FullCommand():
if client.Delta {
stream := client.DeltaClusterStream()
watchDeltaStream(log, stream, resource_v3.ClusterType, resources, client.Nack, client.NodeID)
} else {
stream := client.ClusterStream()
watchstream(log, stream, resource_v3.ClusterType, resources, client.Nack, client.NodeID)
}
case eds.FullCommand():
if client.Delta {
stream := client.DeltaEndpointStream()
watchDeltaStream(log, stream, resource_v3.EndpointType, resources, client.Nack, client.NodeID)
} else {
stream := client.EndpointStream()
watchstream(log, stream, resource_v3.EndpointType, resources, client.Nack, client.NodeID)
}
case lds.FullCommand():
if client.Delta {
stream := client.DeltaListenerStream()
watchDeltaStream(log, stream, resource_v3.ListenerType, resources, client.Nack, client.NodeID)
} else {
stream := client.ListenerStream()
watchstream(log, stream, resource_v3.ListenerType, resources, client.Nack, client.NodeID)
}
case rds.FullCommand():
if client.Delta {
stream := client.DeltaRouteStream()
watchDeltaStream(log, stream, resource_v3.RouteType, resources, client.Nack, client.NodeID)
} else {
stream := client.RouteStream()
watchstream(log, stream, resource_v3.RouteType, resources, client.Nack, client.NodeID)
}
case sds.FullCommand():
if client.Delta {
stream := client.DeltaRouteStream()
watchDeltaStream(log, stream, resource_v3.SecretType, resources, client.Nack, client.NodeID)
} else {
stream := client.RouteStream()
watchstream(log, stream, resource_v3.SecretType, resources, client.Nack, client.NodeID)
}
case serve.FullCommand():
// Parse args a second time so cli flags are applied
// on top of any values sourced from -c's config file.
kingpin.MustParse(app.Parse(args))
if serveCtx.Config.Debug {
log.SetLevel(logrus.DebugLevel)
}
// Reinitialize with the target debug level.
k8s.InitLogging(
k8s.LogWriterOption(log.WithField("context", "kubernetes")),
k8s.LogLevelOption(int(serveCtx.KubernetesDebug)),
)
log.Infof("args: %v", args)
// Validate the result of applying the command-line
// flags on top of the config file.
if err := serveCtx.Config.Validate(); err != nil {
log.WithError(err).Fatal("invalid configuration")
}
// Build out serve deps.
serve, err := NewServer(log, serveCtx)
if err != nil {
log.WithError(err).Fatal("unable to initialize Server dependencies required to start Contour")
}
if err := serve.doServe(); err != nil {
log.WithError(err).Fatal("Contour server failed")
}
case version.FullCommand():
println(build.PrintBuildInfo())
default:
app.Usage(args)
os.Exit(2)
}
}