Install Oracle Instant client into Docker container for Python cx_Oracle

问题

I'm trying to connect to an Oracle database at my company through my docker container that contains some of my python scripts with the package cx_Oracle. After i build and run the container, i get the following error:

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

I have an Oracle config file where the username, password, and server name are coming from and being filled in correctly. I can't seem to get it to work even after downloading the latest client from https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html.

My directory structure looks like this:

--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

Here is my 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"]

Here is my requirements.txt file:

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

回答1:

One solution is to try:

FROM python:3.7.4-slim-buster

RUN apt-get update && apt-get install -y libaio1 wget unzip

WORKDIR /opt/oracle
RUN 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
RUN python -m pip install cx_Oracle

If you use a different base image you may not need to explicitly install unzip or libaio1. If you're happy using ADD, then you won't need wget either.

Also there is a recent Oracle webcast recording discussing cx_Oracle and Docker at https://asktom.oracle.com/pls/apex/f?p=100:551:::NO:RP,551:P551_CLASS_ID:6632&cs=18BE804CCFDC91F33951D7F141508CA25

来源：https://stackoverflow.com/questions/58992954/install-oracle-instant-client-into-docker-container-for-python-cx-oracle

标签

python

Oracle

Docker

dockerfile

containers