Redis filter

Redis filter

Requirements

Sandbox environment

Setup your sandbox environment with Docker and Docker Compose, and clone the Envoy repository with Git.

redis

Redis client to query the server.

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.

Step 1: Build the sandbox

Change to the examples/redis directory.

Build and start the containers.

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      6379/tcp

Step 2: 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 3: 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