Dockerfile shows how to Install cx_Oracle in Docker

Dockerfile

FROM centos:7

RUN mkdir -p /opt/oracle

WORKDIR /opt/oracle

RUN yum install -y https://centos7.iuscommunity.org/ius-release.rpm

RUN yum update -y && \
    yum install -y unzip libaio python36u python36u-pip && \
    unzip /tmp/instantclient-basic-linux.x64-12.2.0.1.0.zip && \
    yum remove -y unzip && \
    sh -c "echo /opt/oracle/instantclient_12_2 > /etc/ld.so.conf.d/oracle-instantclient.conf" && \
    ldconfig && \
    mkdir -p /opt/oracle/instantclient_12_2/network/admin && \
    pip3.6 install --upgrade pip && \
    pip3.6 install cx-Oracle