Question

这种情况：有一个带有dB的容器和该应用程序的Django容器，它通过链接连接到dB并自行启动：

FROM deb_base
COPY vfnd vfnd
CMD ["python", "./vfnd/manage.py", "runserver", "0.0.0.0:8001"]

不好的是，每次我启动容器时，都必须手动运行python vfnd / manage.py迁移。

尝试以下代码：

FROM deb_base
COPY vfnd vfnd
RUN ["python", "./vfnd/manage.py", "migrate"]
CMD ["python", "./vfnd/manage.py", "runserver", "0.0.0.0:8001"]

但是，当您尝试构建映像时，此命令会收到错误消息

Step 3/4 : RUN ["python","./vfnd/manage.py","migrate"]
 ---> Running in 5791de6fc147
Traceback (most recent call last):
  File "/usr/share/Python-3.7.3/lib/python3.7/site-packages/django/db/backends/b
ase/base.py", line 216, in ensure_connection
    self.connect()
  File "/usr/share/Python-3.7.3/lib/python3.7/site-packages/django/db/backends/b
ase/base.py", line 194, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/share/Python-3.7.3/lib/python3.7/site-packages/django/db/backends/p
ostgresql/base.py", line 168, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/usr/share/Python-3.7.3/lib/python3.7/site-packages/psycopg2/__init__.py
", line 126, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not translate host name "pg_1" to address: Name
 or service not known

我如何实现我的想法

Answer 1

将这些命令放在脚本中，然后将其作为入口点在dockerfile中运行。

使用内容创建init.sh脚本

#!/bin/bash

python /vfnd/manage.py migrate
python /vfnd/manage.py runserver 0.0.0.0:8001

exec "$@"

将您的dockerfile更改为

FROM deb_base
COPY vfnd /
COPY init.sh /init.sh
ENTRYPOINT ["/init.sh"]

希望这会有所帮助。

如果数据库位于另一个容器中，如何迁移到dockerfile？

1 个答案: