[英]How to connect to PostgreSQL using docker-compose?
想使用docker-compose
一起運行api應用程序和postgresql數據庫。
docker-compose
文件:
version: '3'
volumes:
database_data:
driver: local
services:
db:
image: postgres:latest
volumes:
- database_data:/var/lib/postgresql/data
api:
build: ./api
expose:
- 8080
ports:
- 8080:8080
volumes:
- ./api:/usr/src/app/
links:
- db
environment:
- PGHOST=db
- PGDATABASE=postgres
- PGUSER=postgres
Api main.go
文件:
func main() {
db, err = gorm.Open("postgres", "host=db port=5432 user=postgres dbname=postgres")
// ...
}
運行服務時,從日志中獲取消息:
api_1 | [GIN] 2018/06/22 - 07:31:10 | 404 | 1.4404ms | 172.20.0.1 | GET /posts
api_1 |
api_1 | (sql: database is closed)
api_1 | [2018-06-22 07:31:10]
api_1 |
api_1 | (sql: database is closed)
api_1 | [2018-06-22 07:31:10]
api_1 | [GIN] 2018/06/22 - 07:32:14 | 403 | 15.6µs | 172.20.0.1 | GET /posts
db_1 | 2018-06-22 07:34:27.296 UTC [81] FATAL: role "root" does not exist
db_1 | 2018-06-22 07:34:36.897 UTC [90] FATAL: role "root" does not exist
這樣做不好嗎? 連接字符串中的host=db
? 由於db
是docker撰寫服務名稱。
它可以工作:
https://docs.docker.com/samples/library/postgres/#-or-via-psql
在您提供的鏈接中,您沒有添加配置設置
restart: always
environment:
POSTGRES_PASSWORD: example
你應該試試這個
version: '3'
services:
db:
image: postgres:latest
restart: always
ports:
- 5432:5432
environment:
POSTGRES_PASSWORD: 'postgres'
volumes:
- database_data:/var/lib/postgresql/data
api:
build: ./api
expose:
- 8080
ports:
- 8080:8080
volumes:
- ./api:/usr/src/app/
links:
- db
environment:
- PGHOST: 'db'
- PGDATABASE: 'postgres'
- PGUSER: 'postgres'
- PGPASSWORD: 'postgres'
volumes:
database_data:
driver: local
和
db, err := gorm.Open("postgres", "host=db port=5432 user=postgres dbname=postgres password=postgres")
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