Error: pg_config executable not found when installing psycopg2 on Alpine in Docker
Error: pg_config executable not found when installing psycopg2 on Alpine in Docker
我正在尝试使用带有 Docker 的 Postgres 构建一个 Flask 应用程序。我想连接到 Postgres 的 AWS RDS 实例,但对我的 Flask 应用程序使用 Docker。但是,当尝试设置 psycopg2
时,它会遇到错误,因为它找不到 pg_config
。这是错误:
Building api
Step 1/5 : FROM python:3.6.3-alpine3.6
---> 84c98ca3b5c5
Step 2/5 : WORKDIR /usr/src/app
---> Using cache
---> 407c158f5ee4
Step 3/5 : COPY . .
---> 966df18d329e
Step 4/5 : RUN pip install -r requirements.txt
---> Running in 284cc97aeb63
Collecting aniso8601==1.3.0 (from -r requirements.txt (line 1))
Downloading aniso8601-1.3.0.tar.gz (57kB)
Collecting click==6.7 (from -r requirements.txt (line 2))
Downloading click-6.7-py2.py3-none-any.whl (71kB)
Collecting Flask==0.12.2 (from -r requirements.txt (line 3))
Downloading Flask-0.12.2-py2.py3-none-any.whl (83kB)
Collecting Flask-RESTful==0.3.6 (from -r requirements.txt (line 4))
Downloading Flask_RESTful-0.3.6-py2.py3-none-any.whl
Collecting Flask-SQLAlchemy==2.3.2 (from -r requirements.txt (line 5))
Downloading Flask_SQLAlchemy-2.3.2-py2.py3-none-any.whl
Collecting itsdangerous==0.24 (from -r requirements.txt (line 6))
Downloading itsdangerous-0.24.tar.gz (46kB)
Collecting Jinja2==2.9.6 (from -r requirements.txt (line 7))
Downloading Jinja2-2.9.6-py2.py3-none-any.whl (340kB)
Collecting MarkupSafe==1.0 (from -r requirements.txt (line 8))
Downloading MarkupSafe-1.0.tar.gz
Collecting psycopg2==2.7.3.1 (from -r requirements.txt (line 9))
Downloading psycopg2-2.7.3.1.tar.gz (425kB)
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
Error: pg_config executable not found.
Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-01lf5grh/psycopg2/
ERROR: Service 'api' failed to build: The command '/bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1
这是我的 Dockerfile
:
FROM python:3.6.3-alpine3.6
WORKDIR /usr/src/app
COPY . .
RUN pip install -r requirements.txt
CMD ["python", "app.py"]
许多其他人似乎在本地也有类似的问题,但其中 none 涉及使用 Docker。这似乎是一个 Docker 问题,因为我可以设置本地虚拟环境并且设置工作正常,因为我在本地安装了 Postgres 并且它能够找到我的本地 pg_config
.
似乎在容器 build/setup 期间,Docker 正试图在容器内找到 pg_config
。有没有办法在容器中安装 pg_config
,即使我不会使用 Postgres 的容器化实例,而是 RDS 上的实例?
欢迎就如何解决此问题提出任何和所有建议。
使用 Python 3.4.8、3.5.5、3.6.5 和 2.7.14 进行测试(只需将 3 替换为 2):
# You can use a specific version too, like python:3.6.5-alpine3.7
FROM python:3-alpine
WORKDIR /usr/src/app
COPY requirements.txt .
RUN \
apk add --no-cache postgresql-libs && \
apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev && \
python3 -m pip install -r requirements.txt --no-cache-dir && \
apk --purge del .build-deps
COPY . .
CMD ["python3", "app.py"]
说明:要构建 Psycopg,您需要软件包 gcc musl-dev postgresql-dev
。然后,您还需要 pg_config 可执行文件:虽然只需安装 postgresql-dev
即可,但 postgresql-libs
也可以,并且占用的空间减少了 12 MB space.
这是答案的原始版本(基于 this Dockerfile),我手动将 Python 安装到纯 Alpine 图像上,因为当时 Python 没有提供 Docker 图片与 Python 3.6 和 Alpine 3.7。如果你想像那样安装 Python 2.7,也可以做 apk add py2-pip
(在旧的 Alpine 仓库中称为 py-pip
)。
FROM alpine:3.7
WORKDIR /usr/src/app
COPY requirements.txt .
RUN \
apk add --no-cache python3 postgresql-libs && \
apk add --no-cache --virtual .build-deps gcc python3-dev musl-dev postgresql-dev && \
python3 -m pip install -r requirements.txt --no-cache-dir && \
apk --purge del .build-deps
COPY . .
CMD ["python3", "app.py"]
你可以试试:
pip install psycopg2-binary
在 Dockerfile
中安装来自 requirements.txt
的依赖项之前,只需添加这些命令(psycopg2 依赖项)
# install psycopg2 dependencies
RUN apk update
RUN apk add postgresql-dev gcc python3-dev musl-dev
来源:https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/
在 Python 3 上,您只需执行以下操作:
sudo apt install libpq-dev python3-dev
我正在尝试使用带有 Docker 的 Postgres 构建一个 Flask 应用程序。我想连接到 Postgres 的 AWS RDS 实例,但对我的 Flask 应用程序使用 Docker。但是,当尝试设置 psycopg2
时,它会遇到错误,因为它找不到 pg_config
。这是错误:
Building api
Step 1/5 : FROM python:3.6.3-alpine3.6
---> 84c98ca3b5c5
Step 2/5 : WORKDIR /usr/src/app
---> Using cache
---> 407c158f5ee4
Step 3/5 : COPY . .
---> 966df18d329e
Step 4/5 : RUN pip install -r requirements.txt
---> Running in 284cc97aeb63
Collecting aniso8601==1.3.0 (from -r requirements.txt (line 1))
Downloading aniso8601-1.3.0.tar.gz (57kB)
Collecting click==6.7 (from -r requirements.txt (line 2))
Downloading click-6.7-py2.py3-none-any.whl (71kB)
Collecting Flask==0.12.2 (from -r requirements.txt (line 3))
Downloading Flask-0.12.2-py2.py3-none-any.whl (83kB)
Collecting Flask-RESTful==0.3.6 (from -r requirements.txt (line 4))
Downloading Flask_RESTful-0.3.6-py2.py3-none-any.whl
Collecting Flask-SQLAlchemy==2.3.2 (from -r requirements.txt (line 5))
Downloading Flask_SQLAlchemy-2.3.2-py2.py3-none-any.whl
Collecting itsdangerous==0.24 (from -r requirements.txt (line 6))
Downloading itsdangerous-0.24.tar.gz (46kB)
Collecting Jinja2==2.9.6 (from -r requirements.txt (line 7))
Downloading Jinja2-2.9.6-py2.py3-none-any.whl (340kB)
Collecting MarkupSafe==1.0 (from -r requirements.txt (line 8))
Downloading MarkupSafe-1.0.tar.gz
Collecting psycopg2==2.7.3.1 (from -r requirements.txt (line 9))
Downloading psycopg2-2.7.3.1.tar.gz (425kB)
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
Error: pg_config executable not found.
Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-01lf5grh/psycopg2/
ERROR: Service 'api' failed to build: The command '/bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1
这是我的 Dockerfile
:
FROM python:3.6.3-alpine3.6
WORKDIR /usr/src/app
COPY . .
RUN pip install -r requirements.txt
CMD ["python", "app.py"]
许多其他人似乎在本地也有类似的问题,但其中 none 涉及使用 Docker。这似乎是一个 Docker 问题,因为我可以设置本地虚拟环境并且设置工作正常,因为我在本地安装了 Postgres 并且它能够找到我的本地 pg_config
.
似乎在容器 build/setup 期间,Docker 正试图在容器内找到 pg_config
。有没有办法在容器中安装 pg_config
,即使我不会使用 Postgres 的容器化实例,而是 RDS 上的实例?
欢迎就如何解决此问题提出任何和所有建议。
使用 Python 3.4.8、3.5.5、3.6.5 和 2.7.14 进行测试(只需将 3 替换为 2):
# You can use a specific version too, like python:3.6.5-alpine3.7
FROM python:3-alpine
WORKDIR /usr/src/app
COPY requirements.txt .
RUN \
apk add --no-cache postgresql-libs && \
apk add --no-cache --virtual .build-deps gcc musl-dev postgresql-dev && \
python3 -m pip install -r requirements.txt --no-cache-dir && \
apk --purge del .build-deps
COPY . .
CMD ["python3", "app.py"]
说明:要构建 Psycopg,您需要软件包 gcc musl-dev postgresql-dev
。然后,您还需要 pg_config 可执行文件:虽然只需安装 postgresql-dev
即可,但 postgresql-libs
也可以,并且占用的空间减少了 12 MB space.
这是答案的原始版本(基于 this Dockerfile),我手动将 Python 安装到纯 Alpine 图像上,因为当时 Python 没有提供 Docker 图片与 Python 3.6 和 Alpine 3.7。如果你想像那样安装 Python 2.7,也可以做 apk add py2-pip
(在旧的 Alpine 仓库中称为 py-pip
)。
FROM alpine:3.7
WORKDIR /usr/src/app
COPY requirements.txt .
RUN \
apk add --no-cache python3 postgresql-libs && \
apk add --no-cache --virtual .build-deps gcc python3-dev musl-dev postgresql-dev && \
python3 -m pip install -r requirements.txt --no-cache-dir && \
apk --purge del .build-deps
COPY . .
CMD ["python3", "app.py"]
你可以试试:
pip install psycopg2-binary
在 Dockerfile
中安装来自requirements.txt
的依赖项之前,只需添加这些命令(psycopg2 依赖项)
# install psycopg2 dependencies
RUN apk update
RUN apk add postgresql-dev gcc python3-dev musl-dev
来源:https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/
在 Python 3 上,您只需执行以下操作:
sudo apt install libpq-dev python3-dev