Redis Server Setup

To get started with Redis, you can utilize the provided docker-compose.yaml file. Simply run the following command to launch the Redis server in detached mode:

docker-compose up -d

Connecting with Redis CLI

If you have redis-cli installed locally, you can connect to the Redis server running on localhost:6379. For convenience, this guide demonstrates using a Redis container's redis-cli to connect to your Redis server, which is assumed to be accessible at redis-server:6379 within the Docker network.

To connect using a Docker container, execute:

docker run -it --network app redis:7.0 redis-cli -h redis-server -p 6379

Upon successful connection, you will see the following prompt:

redis-server:6379>

Once connected, you can directly issue commands like INFO without prefixing them with redis-cli. If you were running this command from within a container, the full command would look like: docker run -it --network app redis:7.0 redis-cli -h redis-server -p 6379 INFO.

Here are a few ways to execute commands:

1. From your local workstation with redis-cli installed: redis-cli INFO
2. Using a container and attaching to its shell: docker run -it --network app redis:7.0 bash, then run redis-cli -h redis-server INFO
3. Using a container and attaching directly to the CLI: docker run -it --network app redis:7.0 redis-cli -h redis-server -p 6379
4. Using a container to run a command in one step: docker run -it --network app redis:7.0 redis-cli -h redis-server -p 6379 redis-cli INFO

This guide will primarily use the method of attaching directly to the Redis CLI within a container:

docker run -it --network app redis:7.0 redis-cli -h redis-server

Common Redis CLI Commands

Retrieve server information:

redis-server:6379> INFO

# Server
redis_version:7.0.5
# Memory
used_memory:945592
used_memory_human:923.43K
# Persistence
loading:0
async_loading:0
# Stats
total_connections_received:1
total_commands_processed:1
instantaneous_ops_per_sec:0
...

View the current Redis configuration:

redis-server:6379> CONFIG GET *

Switch to a different database (default is database 0):

redis-server:6379> SELECT 1

To check the number of available databases, you can query the server info:

docker run -it --network app redis:7.0 bash
redis-cli -h redis-server INFO | grep ^db

Delete the currently selected database:

redis-server:6379> FLUSHDB

Delete all databases:

redis-server:6379> FLUSHALL

List all keys in the current database:

redis-server:6379> keys *

Set a key-value pair in the cache:

redis-server:6379> set name ruan

Retrieve a value from the cache using its key:

redis-server:6379> get name

External Resources

• Official Redis Commands Documentation
• Redis Cheat Sheet by lzone.de
• Redis Commands Gist by LeCoupa