Redis Filter

In this example, we show how a Redis filter can be used with the Envoy proxy. The Envoy proxy configuration includes a Redis filter that routes egress requests to redis server.

Running the Sandboxes

The following documentation runs through the setup of the services.

Step 1: Install Docker

Ensure that you have a recent versions of docker and docker-compose.

A simple way to achieve this is via the Docker Desktop.

Step 2: Clone the Envoy repo

If you have not cloned the Envoy repo, clone it with:

git clone git@github.com:envoyproxy/envoy

or

git clone https://github.com/envoyproxy/envoy.git

Step 3: Build the sandbox

Terminal 1

$ pwd
envoy/examples/redis
$ docker-compose pull
$ docker-compose up --build -d
$ docker-compose ps

    Name                   Command               State                             Ports
------------------------------------------------------------------------------------------------------------------
redis_proxy_1   /docker-entrypoint.sh /bin       Up      10000/tcp, 0.0.0.0:1999->1999/tcp, 0.0.0.0:8001->8001/tcp
redis_redis_1   docker-entrypoint.sh redis       Up      0.0.0.0:6379->6379/tcp

Step 4: Issue Redis commands

Issue Redis commands using your favourite Redis client, such as redis-cli, and verify they are routed via Envoy.

Terminal 1

$ redis-cli -h localhost -p 1999 set foo foo
OK
$ redis-cli -h localhost -p 1999 set bar bar
OK
$ redis-cli -h localhost -p 1999 get foo
"foo"
$ redis-cli -h localhost -p 1999 get bar
"bar"

Step 5: Verify egress stats

Go to http://localhost:8001/stats?usedonly&filter=redis.egress_redis.command and verify the following stats:

redis.egress_redis.command.get.total: 2
redis.egress_redis.command.set.total: 2