如何解决无法将Go Application连接到docker-compose中的postgres容器
我一直在尝试使用docker-compose将go应用程序连接到postgresql数据库。
这是我用于Web服务器的Dockerfile
FROM golang:latest
RUN mkdir /app
COPY . /app
WORKDIR /app
RUN go mod download
EXPOSE 5000
CMD ["go","run","main.go"]
这是我的docker-compose.yml文件
version: '3'
services:
db:
image: postgres:latest
restart: always
network_mode: bridge
environment:
POSTGRES_USER: factly
POSTGRES_PASSWORD: qwertyui
POSTGRES_DB: factly
ports:
- "5432:5432"
server:
build: .
depends_on:
- db
ports:
- "5000:5000"
但是我无法连接到PostgreSQL数据库,因为它提供了来自
的拒绝连接错误消息Go serverStarting factly_db_1 ...
Starting factly_db_1 ... done
Recreating factly_server_1 ...
Recreating factly_server_1 ... done
Attaching to factly_db_1,factly_server_1
db_1 |
db_1 | PostgreSQL Database directory appears to contain a database; Skipping initialization
db_1 |
db_1 | 2020-08-19 06:11:17.151 UTC [1] LOG: starting PostgreSQL 12.4 (Debian 12.4-1.pgdg100+1) on x86_64-pc-linux-gnu,compiled by gcc (Debian 8.3.0-6) 8.3.0,64-bit
db_1 | 2020-08-19 06:11:17.151 UTC [1] LOG: listening on IPv4 address "0.0.0.0",port 5432
db_1 | 2020-08-19 06:11:17.152 UTC [1] LOG: listening on IPv6 address "::",port 5432
db_1 | 2020-08-19 06:11:17.266 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-08-19 06:11:17.906 UTC [26] LOG: database system was shut down at 2020-08-19 05:56:39 UTC
db_1 | 2020-08-19 06:11:18.213 UTC [1] LOG: database system is ready to accept connections
server_1 | host=127.0.0.1 port=5432 user=factly password=qwertyui dbname=factly sslmode=disable
server_1 | 2020/08/19 06:11:21 dial tcp 127.0.0.1:5432: connect: connection refused
server_1 | exit status 1
factly_server_1 exited with code 1
我尝试仅运行postgres容器并将其与Go应用程序连接,该应用程序运行良好,但是在容器内运行Go应用程序会产生相同的错误(这使我感到Go Web服务器容器无法在外部连接它是网络)。 我该如何纠正?
解决方法
我想问题是您正在尝试从go程序连接到127.0.0.1
,而不是使用数据库容器db
的主机名。
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