shell - How to have two JARs start automatically on "docker run container" -

i want 2 seperate jar files executed automatically once docker container called via run command, when type docker run mycontainer both called. far, have dockerfile looks this:

# base image java:8 (ubuntu) java:8  # add files image  add first.jar . add second.jar .  # start on run cmd ["/usr/lib/jvm/java-8-openjdk-amd64/bin/java", "-jar", "first.jar"] cmd ["/usr/lib/jvm/java-8-openjdk-amd64/bin/java", "-jar", "second.jar"] 

this, however, starts second.jar.

now, both jars servers in loop, guess once 1 started blocks terminal. if run container using run -it mycontainer bash , call them manually, too, first 1 outputs , can't start other one.

is there way open different terminals , switch between them have each jar run in own context? preferably in dockerfile.

i know next nothing ubuntu found xterm command opens new terminal, won't work after calling jar. i'm looking instructions inside dockerfile example open new terminal, execute first.jar, alt-tab old terminal , execute second.jar there, or @ least achieve same.

thanks!

the second cmd instruction replaces first, need use single instruction both commands.

easy (not good) approach

you add bash script executes both commands , blocks on second one:

# start.sh /usr/lib/jvm/java-8-openjdk-amd64/bin/java -jar first.jar & /usr/lib/jvm/java-8-openjdk-amd64/bin/java -jar second.jar 

then change dockerfile this:

# base image java:8 (ubuntu) java:8  # add files image  add first.jar . add second.jar . add start.sh .  # start on run cmd ["bash", "start.sh"] 

when using docker stop might not shut down properly, see: https://blog.phusion.nl/2015/01/20/docker-and-the-pid-1-zombie-reaping-problem/

better approach

to solve this, use phusion: https://hub.docker.com/r/phusion/baseimage/
has init-system easier use e.g. supervisord.

here starting point: https://github.com/phusion/baseimage-docker#getting_started

instructions using phusion

sadly there not official openjdk-8-jdk available ubuntu 14.04 lts. try inofficial ppa, used in following explanation.

in case need bash scripts (which act "services"):

# start-first.sh (the file has start following line!): #!/bin/bash usr/lib/jvm/java-8-openjdk-amd64/bin/java -jar /root/first.jar  # start-second.sh #!/bin/bash usr/lib/jvm/java-8-openjdk-amd64/bin/java -jar /root/second.jar 

and dockerfile this:

# base image phusion phusion/baseimage:latest  # use init service of phusion cmd ["/sbin/my_init"]  # install unofficial openjdk-8 run add-apt-repository ppa:openjdk-r/ppa && apt-get update && apt-get dist-upgrade -y && apt-get install -y openjdk-8-jdk  add first.jar /root/first.jar add second.jar /root/second.jar  # add first service run mkdir /etc/service/first add start-first.sh /etc/service/first/run run chmod +x /etc/service/first/run  # add second service run mkdir /etc/service/second add start-second.sh /etc/service/second/run run chmod +x /etc/service/second/run  # clean run apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* 

this should install 2 services run on startup , shut down when using docker stop.