I would like to use docker-compose to start an IBM MQ server and a Python "pymqi" client connecting on server.
To achieve this, I wrote three Docker containers: cpython, pymqi and application.
application is based on pymqi itself based on cpython (to separate concerns).
I keep getting pymqi.MQMIError: MQI Error. Comp: 2, Reason 2195: FAILED: MQRC_UNEXPECTED_ERROR.
I've investigated in /var/mqm/qmgrs/QM1/errors/ and in /var/mqm/errors/ (as suggested by T.Rob)
I think something is wrong in pymqi container but can't find what.
The most frustrating part is that Docker client example works like a charm !
Source codes used below (sandbox available on my repo)
cpython Dockerfile
###
### Compiled home made CPython 3 docker image upon Ubuntu.
###
FROM ubuntu:18.04
RUN apt-get update -y
RUN apt-get install -y --no-install-recommends \
bash \
bc \
ca-certificates \
coreutils \
debianutils \
build-essential \
file \
findutils \
gawk \
grep \
libc-bin \
lsb-release \
mount \
passwd \
procps \
sed \
tar \
vim \
wget
RUN apt-get install -y --no-install-recommends \
zlib1g-dev \
libncurses5-dev \
libgdbm-dev \
libnss3-dev \
libssl-dev \
libreadline-dev \
libffi-dev
ARG PYTHON_MAJOR=3
ARG PYTHON_MINOR=8
ARG PYTHON_MICRO=2
ENV PYTHON_VERSION=${PYTHON_MAJOR}.${PYTHON_MINOR}.${PYTHON_MICRO}
RUN echo "Building CPython ${PYTHON_VERSION}"
ENV PYTHON_BINARY=python${PYTHON_MAJOR}.${PYTHON_MINOR}
ENV PYTHON_ARCHIVE_DIRECTORY=Python-${PYTHON_VERSION}
ENV PYTHON_ARCHIVE_FILENAME=${PYTHON_ARCHIVE_DIRECTORY}.tgz
ENV PYTHON_ARCHIVE_URL=https://www.python.org/ftp/python/${PYTHON_VERSION}/${PYTHON_ARCHIVE_FILENAME}
ENV ROOT_DIRECTORY=/tmp
ENV ARCHIVES_DIRECTORY=${ROOT_DIRECTORY}/PythonArchives
ENV EXTRACT_DIRECTORY=${ARCHIVES_DIRECTORY}/${PYTHON_ARCHIVE_DIRECTORY}
# Download archive
RUN mkdir --parents ${ARCHIVES_DIRECTORY}
RUN wget --quiet ${PYTHON_ARCHIVE_URL} --directory ${ARCHIVES_DIRECTORY}
# Extract archive
RUN tar --extract --file ${ARCHIVES_DIRECTORY}/${PYTHON_ARCHIVE_FILENAME} --directory ${ARCHIVES_DIRECTORY}
# Start compiling CPython
RUN cd ${EXTRACT_DIRECTORY} && ./configure --enable-optimizations
RUN cd ${EXTRACT_DIRECTORY} && make --jobs 8
RUN cd ${EXTRACT_DIRECTORY} && make altinstall
# Reset default python3 symbolic link
RUN unlink /usr/bin/python3
RUN ln -sv /usr/local/bin/${PYTHON_BINARY} /usr/bin/python3
# Remove shebang from /usr/bin/lsb_release to unblock pip (c.f. https://stackoverflow.com/q/44967202/5037799)
RUN sed -i 1d /usr/bin/lsb_release
# Update Python 3 essential modules
RUN python3 -m pip install -U pip setuptools
pymqi Dockerfile
###
### Reworked docker image from https://developer.ibm.com/answers/questions/488740/running-mqclient-pymqi-in-docker/
###
FROM richarddally/cpython:3.8.2_18.04
# Download and extract the MQ installation files
ARG DIR_EXTRACT=/tmp/mq
ENV ARCHIVE_FILENAME=mqadv_dev914_ubuntu_x86-64.tar.gz
# The URL to download the MQ installer from in tar.gz format
ARG MQ_URL=https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqadv/${ARCHIVE_FILENAME}
RUN echo $MQ_URL
RUN mkdir -p $DIR_EXTRACT && cd $DIR_EXTRACT
RUN wget --quiet $MQ_URL
RUN tar --ungzip --extract --file mqadv_dev914_ubuntu_x86-64.tar.gz --directory $DIR_EXTRACT
RUN rm ${ARCHIVE_FILENAME}
# Recommended: Remove packages only needed by this script
RUN apt-get purge -y ca-certificates curl
# Recommended: Remove any orphaned packages
RUN apt-get autoremove -y --purge
# Recommended: Create the mqm user ID with a fixed UID and group, so that the file permissions work between different images
RUN groupadd --system --gid 999 mqm
RUN useradd --system --uid 999 --gid mqm mqm
RUN usermod -G mqm root
# The MQ packages to install
ARG MQ_PACKAGES="ibmmq-client ibmmq-sdk ibmmq-runtime"
# Find directory containing .deb files
ARG DIR_DEB=${DIR_EXTRACT}/MQServer
# Find location of mqlicense.sh
ARG MQLICENSE=${DIR_EXTRACT}/MQServer/mqlicense.sh
# Accept the MQ license
RUN ${MQLICENSE} -text_only -accept
RUN echo "deb [trusted=yes] file:${DIR_DEB} ./" > /etc/apt/sources.list.d/IBM_MQ.list
# Install MQ using the DEB packages
RUN apt-get update
RUN apt-get install -y $MQ_PACKAGES
# Remove 32-bit libraries from 64-bit container
RUN find /opt/mqm /var/mqm -type f -exec file {} \; | awk -F: '/ELF 32-bit/{print $1}' | xargs --no-run-if-empty rm -f
# Remove tar.gz files unpacked by RPM postinst scripts
RUN find /opt/mqm -name '*.tar.gz' -delete
# Recommended: Set the default MQ installation (makes the MQ commands available on the PATH)
RUN /opt/mqm/bin/setmqinst -p /opt/mqm -i
# Clean up all the downloaded files
RUN rm -f /etc/apt/sources.list.d/IBM_MQ.list
RUN rm -rf ${DIR_EXTRACT}
# Apply any bug fixes not included in base Ubuntu or MQ image.
# Don't upgrade everything based on Docker best practices https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#run
RUN apt-get upgrade -y sensible-utils
# End of bug fixes
RUN rm -rf /var/lib/apt/lists/*
# Optional: Update the command prompt with the MQ version
RUN echo "mq:$(dspmqver -b -f 2)" > /etc/debian_chroot && rm -rf /var/mqm
ENV LANG=en_US.UTF-8
RUN export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/mqm/lib64/
# Support the latest functional cmdlevel by default
ENV MQ_QMGR_CMDLEVEL=802
# Always put the MQ data directory in a Docker volume
VOLUME /var/mqm
RUN chmod +x /var/mqm
application Dockerfile (filename: dockerfile.ibm_mq_client)
FROM richarddally/pymqi
RUN mkdir -p /app
WORKDIR /app
# Install requirements
ADD requirements.txt /app
RUN python3 -m pip install -r requirements.txt
ADD mqclient.py /app
ENTRYPOINT ["python3", "/app/mqclient.py"]
mqclient.py code
import pymqi
queue_manager = 'QM1'
qmgr = pymqi.connect(queue_manager)
qmgr.disconnect()
docker-compose.yml configuration file
version: '3'
services:
client:
build:
context: .
dockerfile: dockerfile.ibm_mq_client
network_mode: host
depends_on:
- server
server:
image: "ibmcom/mq"
environment:
- LICENSE=accept
- MQ_QMGR_NAME=QM1
ports:
- "1414:1414" # Queue manager
- "9443:9443" # Web console
