如何让docker-compose容器看到Redis主机？

huangapple
go评论95阅读模式
英文:

How to get docker-compose container to see Redis host?

问题

我有这个简单的docker-compose.yml文件：

  1. version: '3.8'
  2. services:
  3.   bot:
  4.     build:
  5.       dockerfile: Dockerfile
  6.       context: .
  7.     links:
  8.       - redis
  9.     depends_on:
  10.       - redis
  11.   redis:
  12.     image: redis:7.0.0-alpine
  13.     ports:
  14.      - "6379:6379"
  15.     environment:
  16.      - REDIS_REPLICATION_MODE=master
  17.     restart: always
  18.     volumes: 
  19.       - cache:/data
  20.     command: redis-server
  21. volumes:
  22.   cache:
  23.     driver: local

这是bot（使用Go语言）连接到redis的方式：

  1. import "github.com/go-redis/redis/v8"
  3. func setRedisClient() {
  4.   rdb = redis.NewClient(&redis.Options{
  5.     Addr:     "redis:6379",
  6.     Password: "",
  7.     DB:       0,
  8.   })
  9. }

bot的Dockerfile：

  1. FROM golang:1.18.3-alpine3.16
  2. WORKDIR /go/src/bot-go
  3. COPY . .
  4. RUN go build .
  5. RUN ./bot-go

但是当我运行docker-compose up --build时，我总是得到以下错误：

  1. panic: dial tcp: lookup redis on 192.168.65.5:53: no such host

无论我对主机还是对docker-compose文件进行了什么更改，都无法找到redis主机。

当我将客户端配置为本地时，应用程序在没有Docker的情况下可以正常工作。

我到底做错了什么？

英文:

I have this simple docker-compose.yml file:

  1. version: '3.8'
  2. services:
  3.   bot:
  4.     build:
  5.       dockerfile: Dockerfile
  6.       context: .
  7.     links:
  8.       - redis
  9.     depends_on:
  10.       - redis
  11.   redis:
  12.     image: redis:7.0.0-alpine
  13.     ports:
  14.      - "6379:6379"
  15.     environment:
  16.      - REDIS_REPLICATION_MODE=master
  17.     restart: always
  18.     volumes: 
  19.       - cache:/data
  20.     command: redis-server
  21. volumes:
  22.   cache:
  23.     driver: local

This is how the bot (in Go) connects to redis:

  1. import "github.com/go-redis/redis/v8"
  3. func setRedisClient() {
  4.   rdb = redis.NewClient(&redis.Options{
  5.     Addr:     "redis:6379",
  6.     Password: "",
  7.     DB:       0,
  8.   })
  9. }

bot Dockerfile:

  1. FROM golang:1.18.3-alpine3.16
  2. WORKDIR /go/src/bot-go
  3. COPY . .
  4. RUN go build .
  5. RUN ./bot-go

But when I run docker-compose up --build I always get:

  1. panic: dial tcp: lookup redis on 192.168.65.5:53: no such host

redis host is never seen no matter what changes I make to the host or to docker-compose file.

The app does work without Docker when I configure the client to local.

What I am doing wrong exactly?

答案1

得分: 3

问题是bot-go镜像一直在构建。在Dockerfile中将RUN ./bot-go改为CMD ["./bot-go"]，一切都会正常工作。

英文:

The problem is the bot-go image never stops building. Change RUN ./bot-go to CMD [ "./bot-go" ] in the Dockerfile and everything will work fine.

huangapple
  • 本文由 发表于 2022年6月4日 23:44:27
  • 转载请务必保留本文链接：https://go.coder-hub.com/72501074.html
  • docker-compose
  • go
  • redis
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