英文:
I'm using Django and Postgres on Docker, but I can't connect to the database after reinitialising
问题
重要提示：Django 无法重新连接到数据库。它在运行时正常工作，然后我尝试重新初始化它，由于下面描述的原因它停止工作。不过，如果我重新启动我的电脑，它就可以正常工作。
我正在使用Django和Docker Compose运行PostgreSQL（一个用于Django，另一个用于PostgreSQL）容器。我一直都能够完美地使用这个容器，没有任何问题。但在输入sudo docker compose down -v和sudo docker compose up -d之后，Firefox 无法连接，并显示以下消息：
连接被重置
所以我运行了sudo docker compose logs -f来查看日志，Django 表示无法连接到Postgres数据库，并显示以下消息：
[...] 端口 5432 连接失败：连接被拒绝
服务器是否在该主机上运行并接受 TCP/IP 连接？
英文:
IMPORTANT NOTE: Django can't RECONNECT to the database. It works, then I try reinitialising it, and it stops working due to what's described below. I can get it to work if I reboot my PC, though.
I'm running Django and PostgreSQL with Docker Compose (one container for Django and the other for PostgreSQL) I was using the container perfectly with no problems. After typing sudo docker compose down -vand sudo docker compose up -d, Firefox won't connect, and will show the message:
>The connection was reset
So I run sudo docker compose logs -f to check the logs and Django says it can't connect to the Postgres database with the following messages:
>[...]port 5432 failed: Connection refused
>Is the server running on that host and accepting TCP/IP connections?
答案1
得分: 0
警告：在尝试此操作之前，请备份您的数据（容器内部）。
重新构建一切都成功了。我只需要输入 sudo docker compose up -d --build，而且不需要重新启动我的计算机。虽然这个方法有效，但我不能说这是最终的答案，因为数据库会丢失所有数据，但由于我的应用程序仍处于开发阶段，这目前不是问题。
英文:
WARNING: back up your data (inside the containers) before trying this.
Rebuilding everything worked. All I had to do was type sudo docker compose up -d --build and I didn't need to reboot my computer for this. While this works, I wouldn't say it's the definitive answer because the database loses all its data, but that isn't a problem right now since my app is still in the development stage.
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