当前位置: > > > > 连接到 postgres 时 Golang docker 错误
来源:stackoverflow
2024-04-21 21:06:39
0浏览
收藏
怎么入门Golang编程?需要学习哪些知识点?这是新手们刚接触编程时常见的问题;下面就来给大家整理分享一些知识点,希望能够给初学者一些帮助。本篇文章就来介绍《连接到 postgres 时 Golang docker 错误》,涉及到,有需要的可以收藏一下
问题内容
我正在尝试使用 docker-compose.yml 文件对我的 golang rest api 进行 dockerize。
假设目前我没有任何 docker 镜像。我只是
运行 docker-compose up -d
它会自动创建 2 个 docker 镜像,其中 1 个是数据库镜像,1 个是代码镜像。
但是当我通过运行命令看到日志时
docker-compose 日志
我得到这些日志
attaching to posty-api_api_1, postgres postgres | postgres | postgresql database directory appears to contain a database; skipping initialization postgres | postgres | 2021-06-14 07:37:46.437 utc [1] log: starting postgresql 13.3 on x86_64-pc-linux-musl, compiled by gcc (alpine 10.2.1_pre1) 10.2.1 20201203, 64-bit postgres | 2021-06-14 07:37:46.438 utc [1] log: listening on ipv4 address "0.0.0.0", port 5432 postgres | 2021-06-14 07:37:46.438 utc [1] log: listening on ipv6 address "::", port 5432 postgres | 2021-06-14 07:37:46.481 utc [1] log: listening on unix socket "/var/run/postgresql/.s.pgsql.5432" postgres | 2021-06-14 07:37:46.607 utc [22] log: database system was shut down at 2021-06-14 07:33:40 utc postgres | 2021-06-14 07:37:46.696 utc [1] log: database system is ready to accept connections api_1 | main.go start api_1 | database.go start api_1 | api_1 | 2021/06/14 07:37:45 /app/database/database.go:23 api_1 | [error] failed to initialize database, got error failed to connect to `host=postgres user=postgres database=postgres`: dial error (dial tcp 172.22.0.2:5432: connect: connection refused) api_1 | panic: failed to connect database api_1 | api_1 | goroutine 1 [running]: api_1 | github.com/usman-174/database.connectdatabase(0xc0001ae2f0) api_1 | /app/database/database.go:26 +0x49a api_1 | github.com/usman-174/app.router(0xa7c120) api_1 | /app/app/app.go:10 +0x26 api_1 | main.main() api_1 | /app/main.go:16 +0x9b
我无法连接数据库。即使我提供了正确的环境变量。
这是我的 .env 文件:
dsn=host=postgres user=postgres password=postgres dbname=postgres port=5432 sslmode=disable client_url=https://clever-montalcini-cedd07.netlify.app/ port=:8080
这是我的 dockerfile:
from golang:1.16.5-alpine3.13 as builder workdir /app copy . . run go build -o main main.go # run stage from alpine:3.13 workdir /app copy --from=builder /app/main . copy .env . expose 8080
这是我的 docker-compose.yml 文件:
# specify the version for docker-compose.yml version: "3.8" # add the serivces needed (postgres,go) services: postgres: container_name: postgres image: postgres:13-alpine environment: postgres_user: postgres postgres_password: postgres postgres_db: auth # optional: give a name to the database, otherwise # use the default value postgres_user as a database name (user in this case.) postgres_db: auth healthcheck: test: ["cmd-shell", "pg_isready -u postgres"] interval: 10s timeout: 5s retries: 5 ports: - "5432:5432" volumes: - ./pgdata:/var/lib/postgresql/data api: build: context: . dockerfile: dockerfile command: ["./wait-for-it.sh", "postgres:5432", "--", "/app/main" ] ports: - "8080:8080" depends_on: - postgres command: [ "/app/main" ]
这就是我连接到数据库的方式:
func ConnectDataBase() *gorm.DB { fmt.Println("database.go START") err := godotenv.Load() if err != nil { log.Fatal("Error loading .env file") } dsn := os.Getenv("DSN") db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{}) if err != nil { panic("failed to connect database") } db.AutoMigrate(&models.User{}) db.AutoMigrate(&models.Post{}) db.AutoMigrate(&models.Like{}) fmt.Println("database.go STOP") return db }
正确答案
dsn
上的数据库名称似乎不正确。
在你的 docker-compose.yml
上它是:
postgres_user: postgres postgres_password: postgres postgres_db: auth ...
同时,在您的 .env
上它是:
DSN=host=postgres user=postgres password=postgres dbname=postgres ...
尝试在 .env
文件上使用 dbname=auth
而不是 dbname=postgres
今天关于《连接到 postgres 时 Golang docker 错误》的内容就介绍到这里了,是不是学起来一目了然!想要了解更多关于的内容请关注公众号!