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Introduction
- Users can build their own Docker images for Controllers.
- This article explains options how to create the Controller image.
Dockerfile
Docker images for JS7 Controllers provided by SOS make use of the following Dockerfile:
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FROM openjdk:8-jre LABEL maintainer="Software- und Organisations-Service GmbH" # BUILD SETTINGS # provide build arguments for release information ARG JS_MAJOR ARG JS_RELEASE # default user id has to match later run-time user ARG JS_USER_ID=${JS_USER_ID:-1001} ARG JS_HTTP_PORT=${JS_HTTP_PORT:-4444} ARG JS_HTTPS_PORT=${JS_HTTPS_PORT:-4443} ARG JS_JAVA_OPTIONS=${JS_JAVA_OPTIONS} # RUN-TIME SETTINGS # JS7 Controller ID, ports and Java options ENV RUN_JS_ID=${RUN_JS_ID:-$JS_ID} ENV RUN_JS_HTTP_PORT=${RUN_JS_HTTP_PORT:-$JS_HTTP_PORT} ENV RUN_JS_HTTPS_PORT=${RUN_JS_HTTPS_PORT} ENV RUN_JS_JAVA_OPTIONS=${RUN_JS_JAVA_OPTIONS:-$JS_JAVA_OPTIONS} # PREPARATION # install process tools, bash RUN apt-get update && \ apt-get install -y procps && \ apt-get install -y bash # setup working directory RUN mkdir -p /var/sos-berlin.com/js7 WORKDIR /var/sos-berlin.com/js7 # add/copy installation tarball # ADD https://download.sos-berlin.com/JobScheduler.${JS_MAJOR}/js7_controller_unix.${JS_RELEASE}.tar.gz /usr/local/src/ COPY js7_controller_unix.${JS_RELEASE}.tar.gz /usr/local/src/ # INSTALLATION # extract installation tarball # for JDK < 12, /dev/random does not provide sufficient entropy, see https://kb.sos-berlin.com/x/lIM3 RUN test -e /usr/local/src/js7_controller_unix.${JS_RELEASE}.tar.gz && \ tar xfvz /usr/local/src/js7_controller_unix.${JS_RELEASE}.tar.gz -C /var/sos-berlin.com/js7/ && \ rm /usr/local/src/js7_controller_unix.${JS_RELEASE}.tar.gz && \ sed -i 's/securerandom.source=file:\/dev\/random/securerandom.source=file:\/dev\/urandom/g' /usr/local/openjdk-8/lib/security/java.security # CONFIGURATION # copy configuration COPY config/ /var/sos-berlin.com/js7/controller/var/config/ # add start script COPY start-controller.sh /usr/local/bin/ # make default user the owner of directories RUN groupadd --gid ${JS_USER_ID:-1001} jobscheduler && \ useradd --uid ${JS_USER_ID:-1001} --gid jobscheduler --home-dir /home/jobscheduler --no-create-home --shell /bin/bash jobscheduler && \ chown -R jobscheduler:jobscheduler /var/sos-berlin.com && \ chmod +x /usr/local/bin/start-controller.sh # CODA # allow incoming traffic to port EXPOSE $RUN_JS_HTTP_PORT $RUN_JS_HTTPS_PORT # run-time user, can be overwritten when running the container USER jobscheduler CMD ["sh","-c","/usr/local/bin/start-controller.sh --id=\"$RUN_JS_ID\" --http-port=$RUN_JS_HTTP_PORT --https-port=$RUN_JS_HTTPS_PORT --java-options=\"$RUN_JS_JAVA_OPTIONS\""] |
Build Script
The build script offers a number of options to parameterize the Dockerfile:
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