将 Oracle Instant 客户端安装到 Python cx_Oracle 的 Docker 容器中

我正在尝试通过 docker 容器连接到我公司的 Oracle 数据库，该容器包含一些带有 cx_Oracle 包的 python 脚本。构建并运行容器后，出现以下错误：

conn = cx_Oracle.connect("{0}/{1}@{2}".format(configOracle["username"], configOracle["password"],r"ed03:1521/configOracle["servername"]))
cx_Oracle.DatabaseError: DPI-1047: Cannot locate a 64-bit Oracle Client library: "libclntsh.so: cannot open shared object file: No such file or directory". See https://oracle.github.io/odpi/doc/installation.html#linux for help

我有一个 Oracle 配置文件，其中用户名、密码和服务器名称来自并正确填写。即使从下载了最新的客户端后，我似乎也无法让它工作https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html.

我的目录结构如下所示：

--TopDirectory
----instantclient
-------instantclient-basic-linux.x64-19.5.0.0.0dbru.zip
-------instantclient-sdk-linux.x64-19.5.0.0.0dbru.zip
----hello_oracle.py
----Dockerfile
----requirements.txt
----configOracle.json

这是我的 Dockerfile：

FROM python:3.7.5

#Oracle Client setup
ENV ORACLE_HOME /opt/oracle/instantclient_19_5
ENV LD_RUN_PATH=$ORACLE_HOME

COPY instantclient/* /tmp/

RUN \
    mkdir -p /opt/oracle && \
    unzip "/tmp/instantclient*.zip" -d /opt/oracle && \
    ln -s $ORACLE_HOME/libclntsh.so.19.1 $ORACLE_HOME/libclntsh.so

# Working directory
WORKDIR /src
# Copying requirements.txt before entire build step
COPY requirements.txt /src/requirements.txt

RUN pip install --upgrade pip
# Installing necessary packages
RUN pip install -r requirements.txt
# Copying rest of files
COPY . /src
CMD ["python3", "/src/hello_oracle.py"]

这是我的requirements.txt 文件：

pandas
numpy
matplotlib
keras
cx_Oracle
sklearn
tensorflow
pyopenssl
ndg-httpsclient
pyasn1

经过几个小时的尝试，我终于用这个 Dockerfile 解决了它

Note 我使用 python 3.7、Django 3.0、Oracle Database 12c 和 Pipenv 进行包管理

FROM python:3.7.5-slim-buster

# Installing Oracle instant client
WORKDIR    /opt/oracle
RUN        apt-get update && apt-get install -y libaio1 wget unzip \
            && wget https://download.oracle.com/otn_software/linux/instantclient/instantclient-basiclite-linuxx64.zip \
            && unzip instantclient-basiclite-linuxx64.zip \
            && rm -f instantclient-basiclite-linuxx64.zip \
            && cd /opt/oracle/instantclient* \
            && rm -f *jdbc* *occi* *mysql* *README *jar uidrvci genezi adrci \
            && echo /opt/oracle/instantclient* > /etc/ld.so.conf.d/oracle-instantclient.conf \
            && ldconfig

WORKDIR    /app
COPY       . .  # Copy my project folder content into /app container directory
RUN        pip3 install pipenv
RUN        pipenv install
EXPOSE     8000
# For this statement to work you need to add the next two lines into Pipfilefile
# [scripts]
# server = "python manage.py runserver 0.0.0.0:8000"
ENTRYPOINT ["pipenv", "run", "server"]