Docker doesn't start MONGODB, and IPAddress doesn't appear, when started with other services

Question

I have already asked this question on serverfault.com. I am asking it here too as I see different set of questions in these 2 sites (it appears like they have different databases).

I have been trying to build an OS image from Fedora unsuccessfully to start the following:

1. Systemd
2. SSHD
3. RabbitMQ
4. MongoDB

I can get the first 3 (Systemd, SSHD and RabbitMQ-Server) to work. I can also get MongoDB to work within the container. However, I cannot get MongoDB to work along with other 3 services.

In addition, IP address doesn't show up when I try to "dockerize" MongoDB.

Am I missing something in the Dockerfile?

Here is my dockerfile:

FROM fedora:20
MAINTAINER “Ashfaque” <ashfaque@email.com>
ENV container docker
RUN yum -y update; yum clean all
RUN yum -y install systemd; yum clean all; \
(cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
rm -f /lib/systemd/system/multi-user.target.wants/*;\
rm -f /etc/systemd/system/*.wants/*;\
rm -f /lib/systemd/system/local-fs.target.wants/*; \
rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
rm -f /lib/systemd/system/basic.target.wants/*;\
rm -f /lib/systemd/system/anaconda.target.wants/*;

# Dockerizing SSH - is working
RUN yum -y install openssh-server
RUN yum -y install openssh-clients
RUN mkdir /var/run/sshd
RUN systemctl enable sshd.service
RUN echo 'root:mypassword' |chpasswd
EXPOSE 22

# Dockerizing RabbitMQ - is working
RUN yum -y install rabbitmq-server
EXPOSE 5672 15672
RUN systemctl enable rabbitmq-server

# Dockerizing MongoDB - is NOT WORKING
RUN yum -y install mongodb-server
RUN yum -y install boost
RUN yum -y install scons
# Create the MongoDB data directory
RUN mkdir -p /data/db /var/log/mongodb /var/run/mongodb
RUN sed -i 's/dbpath =\/var\/lib\/mongodb/dbpath =\/data\/db/' /etc/mongodb.conf
# Expose port 27017 from the container to the host
EXPOSE 27017
# Set usr/bin/mongod as the dockerized entry-point application
ENTRYPOINT ["/usr/bin/mongod"]
#CMD ["--port", "27017", "--dbpath", "/data/db", "--smallfiles", "--fork", "--syslog"]
#RUN /usr/bin/mongod --smallfiles --port 27017 --dbpath /data/db --fork --syslog

VOLUME ["/sys/fs/cgroup", "/data/db", "/var/log/mongodb", "/usr/bin"]
CMD ["/usr/sbin/init"]

Docker Commands used to build are:

(1) docker build -t rabbitmq_mongo_heisenbug .

(2) docker run --privileged -d -e 'container=docker' -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 29022:22 -p 29672:15672 -p 29017:27017 rabbitmq_mongo_heisenbug

or.. (3) docker run --privileged -ti -e 'container=docker' -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 29022:22 -p 29672:15672 -p 29017:27017 rabbitmq_mongo_heisenbug

Answer 1

You are using both ENTRYPOINT and CMD in your Dockerfile. This means, that docker will run /usr/bin/mongod with default parameter /usr/sbin/init. I'm pretty sure this is not what you want.

Docker will run as long as the command you specified is running. I'm not sure about /usr/bin/mongod, but if it runs in daemon mode (that is, spawn a process and return), then the container will stop running right away. The spawned processes will be terminated. The same is true for /usr/sbin/init or for any other command you specify. You can write a small shell script, which spawns the processes and runs one in the foreground, or you can use runit, or some similar tool.

Also, you probably don't need to run sshd in your container. See here why.