initialize repository

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Reinaldy Rafli <aldy505@tutanota.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,57 @@
+# Local Redis Cluster with Docker Compose
+
+Sets up a local Redis v6 cluster with 3 master nodes and no replica.
+
+To add a new replica, just modify the `docker-compose.yml` file and add some more redis instance with different `ipv4_address` subnet. Then, add that new subnet into the `command` field on `redis-cluster-init`, and add the service on the `depends_on` field so the initialization service will only execute if everything's running.
+
+To run it:
+```sh
+docker compose up -d
+```
+
+There is no user. The password is `foobared`. Change the password to anything in `redis.conf` file.
+
+Don't use this configuration in production.
+
+To connect with Go:
+```go
+package main
+
+import (
+    "context"
+    "time"
+
+	"github.com/go-redis/redis/v8"
+)
+
+func main() {
+    cache := redis.NewClusterClient(&redis.ClusterOptions{
+		Addrs:        []string{"localhost:6379", "localhost:6380", "localhost:6381"},
+		ReadOnly:     true,
+		Username:     "",
+		Password:     "foobared",
+		DialTimeout:  time.Second * 30,
+		WriteTimeout: time.Second * 5,
+		ReadTimeout:  time.Second * 5,
+		IdleTimeout:  time.Second * 30,
+	})
+    defer cache.Close()
+
+    ctx, cancel := context.WithTimeout(context.Background(), time.Second * 60)
+    defer cancel()
+
+    err := cache.SetEX(ctx, "hello", "world").Err()
+    if err != nil {
+        log.Printf(err)
+        return
+    }
+
+    res, err := cache.Get(ctx, "hello").Result()
+    if err != nil {
+        log.Printf(err)
+        return
+    }
+
+    log.Println(res)
+}
+```

docker-compose.yml

@@ -0,0 +1,84 @@
+services:
+  redis-cluster-init:
+    image: redis:6-alpine
+    command: redis-cli -h redis1 -a foobared --cluster create 172.20.0.31:6379 172.20.0.32:6379 172.20.0.33:6379 --cluster-replicas 0 --cluster-yes
+    depends_on:
+      redis1:
+        condition: service_healthy
+      redis2:
+        condition: service_healthy
+      redis3:
+        condition: service_healthy
+    networks:
+      app_subnet:
+        ipv4_address: 172.20.0.30
+
+  redis1:
+    image: redis:6-alpine
+    ports:
+      - 6379:6379
+    restart: unless-stopped
+    environment:
+      TZ: UTC
+      TZDATA: UTC
+    command: redis-server /home/redis/redis.conf --cluster-announce-ip 172.20.0.31
+    volumes:
+      - ./redis.conf:/home/redis/redis.conf
+    networks:
+      app_subnet:
+        ipv4_address: 172.20.0.31
+    healthcheck:
+      test: "redis-cli -a foobared ping | grep PONG"
+      interval: 10s
+      timeout: 10s
+      retries: 10
+      start_period: 10s
+
+  redis2:
+    image: redis:6-alpine
+    ports:
+      - 6380:6379
+    restart: unless-stopped
+    environment:
+      TZ: UTC
+      TZDATA: UTC
+    command: redis-server /home/redis/redis.conf --cluster-announce-ip 172.20.0.32
+    volumes:
+      - ./redis.conf:/home/redis/redis.conf
+    networks:
+      app_subnet:
+        ipv4_address: 172.20.0.32
+    healthcheck:
+      test: "redis-cli -a foobared ping | grep PONG"
+      interval: 10s
+      timeout: 10s
+      retries: 10
+      start_period: 10s
+
+  redis3:
+    image: redis:6-alpine
+    ports:
+      - 6381:6379
+    restart: unless-stopped
+    environment:
+      TZ: UTC
+      TZDATA: UTC
+    command: redis-server /home/redis/redis.conf --cluster-announce-ip 172.20.0.33
+    volumes:
+      - ./redis.conf:/home/redis/redis.conf
+    networks:
+      app_subnet:
+        ipv4_address: 172.20.0.33
+    healthcheck:
+      test: "redis-cli -a foobared ping | grep PONG"
+      interval: 10s
+      timeout: 10s
+      retries: 10
+      start_period: 10s
+
+networks:
+  app_subnet:
+    driver: bridge
+    ipam:
+      config:
+        - subnet: 172.20.0.0/24