example

README

Example xDS Server

This is an example of a trivial xDS V3 control plane server. It serves an Envoy configuration that's roughly equivalent to the one used by the Envoy "Quick Start" docs: a simple http proxy. You can run the example using the project top-level Makefile, e.g.:

go-control-plane$ make example

The Makefile builds the example server and then runs build/example.sh which runs both Envoy and the example server. The example server serves a configuration defined in internal/example/resource.go. If everything works correctly, you should be able to open a browser to http://localhost:10000 and see Envoy's website.

Files

• main/main.go is the example program entrypoint. It instantiates the cache and xDS server and runs the xDS server process.
• resource.go generates a Snapshot structure which describes the configuration that the xDS server serves to Envoy.
• server.go runs the xDS control plane server.
• logger.go implements the pkg/log/Logger interface which provides logging services to the cache.

Documentation

Overview

Copyright 2020 Envoyproxy 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.

Copyright 2020 Envoyproxy 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.

Copyright 2020 Envoyproxy 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.

Index

• Constants
• func GenerateSnapshot() cache.Snapshot
• func RunServer(ctx context.Context, srv server.Server, port uint)
• type Logger
  • func (logger Logger) Debugf(format string, args ...interface{})
  • func (logger Logger) Errorf(format string, args ...interface{})
  • func (logger Logger) Infof(format string, args ...interface{})
  • func (logger Logger) Warnf(format string, args ...interface{})

Constants

const (
	ClusterName  = "example_proxy_cluster"
	RouteName    = "local_route"
	ListenerName = "listener_0"
	ListenerPort = 10000
	UpstreamHost = "www.envoyproxy.io"
	UpstreamPort = 80
)

Functions

func GenerateSnapshot

func GenerateSnapshot() cache.Snapshot

func RunServer

func RunServer(ctx context.Context, srv server.Server, port uint)

RunServer starts an xDS server at the given port.

Types

type Logger

type Logger struct {
	Debug bool
}

An example of a logger that implements `pkg/log/Logger`. Logs to stdout. If Debug == false then Debugf() and Infof() won't output anything.

func (Logger) Debugf

func (logger Logger) Debugf(format string, args ...interface{})

Log to stdout only if Debug is true.

func (Logger) Errorf

func (logger Logger) Errorf(format string, args ...interface{})

Log to stdout always.

func (Logger) Infof

func (logger Logger) Infof(format string, args ...interface{})

Log to stdout only if Debug is true.

func (Logger) Warnf

func (logger Logger) Warnf(format string, args ...interface{})

Log to stdout always.