Purpose

Hi, this post would demo a fully working yaml configuration file for envoy, which is the leading open source software for microservice proxy and a core component in service mesh.

About Envoy

Envoy is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who’s involved and how Envoy plays a role, read the CNCF announcement.

The Yaml

static_resources:
  
  listeners:
  - name: listener
    address:
      socket_address: { address: 0.0.0.0, port_value: 10080 }

    filter_chains:
    - filters:
      - name: envoy.http_connection_manager
        config:
          stat_prefix: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match: { prefix: "/" }
                route: { host_rewrite: www.bswen.com, cluster: service_bswen }
          http_filters:
          - name: envoy.router

  clusters:
  - name: service_bswen
    connect_timeout: 0.25s
    type: LOGICAL_DNS
    dns_lookup_family: V4_ONLY
    lb_policy: ROUND_ROBIN
    hosts: [{ socket_address: { address: bswen.com, port_value: 443 }}]
    tls_context: { sni: www.bswen.com }

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address: { address: 0.0.0.0, port_value: 9901 }

The above yaml would accomplish these jobs:

  • Listen on localhost’s 10080, wait for the http requests
  • It would proxy all incoming http requests to www.bswen.com

Start/Run envoy and test the url proxy

Now let’s save the above configuration file as envoy.yaml, and then start a docker instance like this:

docker run --name=bswenproxy -d -p 80:10080 \
  -v envoy.yaml envoyproxy/envoy:latest

Here we start an envoy instance with the latest version.

Then we cat test the proxy like this:

curl localhost

You should see the homepage of bswen.com.

References

You can view some references as follows: