Can't connect to Oracle DB within the Ubuntu 18.04 as the Docker image

Hi There,

First of all, there is no issues connecting to the Oracle DB in the Click2Computer machine with the OS(Ubuntu 18.04).

However, when I used Ubuntu 18.04 as the Docker base image, installed the same Oracle clients and launched a docker container, the connection hanged forever without error. I know the Docker image(Ubuntu 18.04) is the minimal version, I wonder whether there are some network issue in it or any dependencies are missing? Please advice.

Here is the reference link I post the question to the oracleDB forum, it has all the details, sorry I can’t attach the images here.

The Dockerfile is

FROM /ubuntu:18.04

Create app directory.

RUN mkdir -p /usr/src/ultraaschedulingapp
WORKDIR /usr/src/ultraaschedulingapp

Bundle app source.

COPY . /usr/src/ultraaschedulingapp

Get oracledb build dependencies.

RUN echo ‘Acquire::http::Proxy "’ >> /etc/apt/apt.conf
RUN echo ‘Acquire::https::Proxy "’ >> /etc/apt/apt.conf
RUN apt-get update
RUN echo "deb " \n “deb-src main” > /etc/apt/sources.list.d/nodesource.list
RUN apt-get install -y curl
RUN apt-get install -y gnupg
RUN apt-get install -y build-essential
RUN apt-get install -y apt-transport-https
RUN curl -s --proxy | apt-key add -
RUN apt-get update
RUN apt-cache policy nodejs
RUN apt-get install -y nodejs
RUN node -v && npm -v

RUN apt-get install libaio1 # Async IO library used by Oracle client.
RUN apt-get install unzip # Unzip for Oracle client.

Install Oracle instant client SDK.

RUN mkdir /opt/oracle
RUN unzip -d /opt/oracle
RUN unzip -d /opt/oracle
RUN pwd && ls
RUN mv /opt/oracle/instantclient_19_5 /opt/oracle/instantclient
#RUN ln -s /opt/oracle/instantclient/ /opt/oracle/instantclient/
ENV LD_LIBRARY_PATH=/opt/oracle/instantclient