mirror of https://github.com/go-redis/redis.git
167 lines
5.5 KiB
Markdown
167 lines
5.5 KiB
Markdown
# Redis client for Golang
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[](https://travis-ci.org/go-redis/redis)
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[](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)
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[](https://redis.uptrace.dev/)
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[](https://discord.gg/rWtp5Aj)
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> :heart:
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> [**Uptrace.dev** - distributed traces, logs, and errors in one place](https://uptrace.dev?utm_source=gh-redis&utm_campaign=gh-redis-var1)
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- Join [Discord](https://discord.gg/rWtp5Aj) to ask questions.
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- [Documentation](https://redis.uptrace.dev)
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- [Reference](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)
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- [Examples](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#pkg-examples)
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- [RealWorld example app](https://github.com/uptrace/go-treemux-realworld-example-app)
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## Ecosystem
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- [Redis Mock](https://github.com/go-redis/redismock).
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- [Distributed Locks](https://github.com/bsm/redislock).
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- [Redis Cache](https://github.com/go-redis/cache).
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- [Rate limiting](https://github.com/go-redis/redis_rate).
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## Features
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- Redis 3 commands except QUIT, MONITOR, and SYNC.
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- Automatic connection pooling with
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[circuit breaker](https://en.wikipedia.org/wiki/Circuit_breaker_design_pattern) support.
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- [Pub/Sub](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#PubSub).
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- [Transactions](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-TxPipeline).
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- [Pipeline](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-Pipeline) and
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[TxPipeline](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-Client-TxPipeline).
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- [Scripting](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#Script).
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- [Timeouts](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#Options).
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- [Redis Sentinel](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewFailoverClient).
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- [Redis Cluster](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewClusterClient).
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- [Cluster of Redis Servers](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#example-NewClusterClient--ManualSetup)
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without using cluster mode and Redis Sentinel.
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- [Ring](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#NewRing).
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- [Instrumentation](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc#ex-package--Instrumentation).
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## Installation
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go-redis supports 2 last Go versions and requires a Go version with
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[modules](https://github.com/golang/go/wiki/Modules) support. So make sure to initialize a Go
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module:
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```shell
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go mod init github.com/my/repo
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```
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And then install go-redis/v8 (note _v8_ in the import; omitting it is a popular mistake):
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```shell
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go get github.com/go-redis/redis/v8
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```
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## Quickstart
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```go
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import (
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"context"
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"github.com/go-redis/redis/v8"
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)
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var ctx = context.Background()
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func ExampleClient() {
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rdb := redis.NewClient(&redis.Options{
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Addr: "localhost:6379",
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Password: "", // no password set
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DB: 0, // use default DB
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})
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err := rdb.Set(ctx, "key", "value", 0).Err()
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if err != nil {
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panic(err)
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}
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val, err := rdb.Get(ctx, "key").Result()
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if err != nil {
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panic(err)
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}
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fmt.Println("key", val)
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val2, err := rdb.Get(ctx, "key2").Result()
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if err == redis.Nil {
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fmt.Println("key2 does not exist")
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} else if err != nil {
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panic(err)
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} else {
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fmt.Println("key2", val2)
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}
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// Output: key value
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// key2 does not exist
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}
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```
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## Look and feel
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Some corner cases:
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```go
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// SET key value EX 10 NX
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set, err := rdb.SetNX(ctx, "key", "value", 10*time.Second).Result()
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// SET key value keepttl NX
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set, err := rdb.SetNX(ctx, "key", "value", redis.KeepTTL).Result()
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// SORT list LIMIT 0 2 ASC
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vals, err := rdb.Sort(ctx, "list", &redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()
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// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
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vals, err := rdb.ZRangeByScoreWithScores(ctx, "zset", &redis.ZRangeBy{
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Min: "-inf",
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Max: "+inf",
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Offset: 0,
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Count: 2,
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}).Result()
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// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
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vals, err := rdb.ZInterStore(ctx, "out", &redis.ZStore{
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Keys: []string{"zset1", "zset2"},
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Weights: []int64{2, 3}
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}).Result()
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// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
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vals, err := rdb.Eval(ctx, "return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()
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// custom command
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res, err := rdb.Do(ctx, "set", "key", "value").Result()
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```
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## Run the test
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go-redis will start a redis-server and run the test cases.
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The paths of redis-server bin file and redis config file are definded in `main_test.go`:
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```
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var (
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redisServerBin, _ = filepath.Abs(filepath.Join("testdata", "redis", "src", "redis-server"))
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redisServerConf, _ = filepath.Abs(filepath.Join("testdata", "redis", "redis.conf"))
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)
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```
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For local testing, you can change the variables to refer to your local files, or create a soft link
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to the corresponding folder for redis-server and copy the config file to `testdata/redis/`:
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```
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ln -s /usr/bin/redis-server ./go-redis/testdata/redis/src
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cp ./go-redis/testdata/redis.conf ./go-redis/testdata/redis/
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```
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Lastly, run:
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```
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go test
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```
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## See also
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- [Fast and flexible HTTP router](https://github.com/vmihailenco/treemux)
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- [Golang PostgreSQL ORM](https://github.com/go-pg/pg)
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- [Golang msgpack](https://github.com/vmihailenco/msgpack)
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- [Golang message task queue](https://github.com/vmihailenco/taskq)
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