Docker-centos-7-systemd-tomcat

Base image for fast create app-containers

• Systemd enabled by official documentation: https://hub.docker.com/_/centos/
  • Also look at
    • https://rhatdan.wordpress.com/2014/04/30/running-systemd-within-a-docker-container/
    • https://maci0.wordpress.com/2014/07/23/run-systemd-in-an-unprivileged-docker-container/ (https://github.com/maci0/docker-systemd-unpriv/blob/master/Dockerfile)
• Based on latest CentOs 7 image
• Include next main packages:
  • systemd as service
  • tomcat 7 (+ tomcat-native) run as service (and use UTF-8 encoding).
• By default exposed port 8080

Automated images available on docker hub

https://hub.docker.com/r/taskdata/docker-centos-7-systemd-tomcat/

Built nesting dockerized apps

Example of Dockerfile for raw war files:

FROM taskdata/docker-centos-7-systemd-tomcat
MAINTAINER Pavel Alexeev
COPY *.war /var/lib/tomcat/webapps/

If you are using rpm (recommended):

FROM taskdata/docker-centos-7-systemd-tomcat
MAINTAINER Pavel Alexeev
COPY *.rpm /
RUN yum install -y /*.rpm \
    && yum clean all

Run and use built app

Unfortunately to run it in un-privileged mode you must provide volume /sys/fs/cgroup from host. F.e.:

docker run -v /sys/fs/cgroup:/sys/fs/cgroup:ro --name lesegais docreg.some.host/lesegais:latest

Then you may access you application.