How to expose docker container's ip and port to outside docker host without port mapping?

You can accomplish this with IP aliasing on the host.

First, add a virtual interface on the host that has a different IP address than the primary interface. We'll call the primary interface eth0 with IP 10.0.0.10, and the virtual interface eth0:1 with IP address 10.0.0.11.

 ifconfig eth0:1 10.0.0.11 netmask 255.255.255.0 up 

Now run the containers and map port 5000 to the corresponding interface. For example:

docker run -p 10.0.0.10:5000:5000 -name container1 <someimage> <somecommand>docker run -p 10.0.0.11:5000:5000 -name container2 <someimage> <somecommand>

Now you can access each container on port 5000 using different IP addresses externally.

When creating a VM make sure that the following are selected under networking

Attached to:        Bridged NetworkManagerAdapter Type:       PCnet-Fast III (Am 79C973)Promiscious Mode    Allow All

RHEL 6.5 / Fedora 20

Install docker, libvrt

Make sure the following are done using root

# chkconfig NetworkManager off# chkconfig network on  # service NetworkManager stop# service network start

Create file ifcfg-xxxxx in /etc/sysconfig/network-scripts

DEVICE=xxxxxTYPE=BridgeBOOTPROTO=dhcpONBOOT=yesDELAY=0

and append to ifcfg-p2p1 / ifcfg-eth0 at the end of the file BRIDGE=xxxx

Restart the VM

run

brctl show 

to make sure the bridged connected has an adapter either p2p1 or eth0 e.g.

# brctl showbridge name     bridge id               STP enabled     interfacesgsbr01          8000.080027595649       no              eth0virbr0          8000.5254004c1564       yes             virbr0-nic

now before starting docker we have to use our bridge and not docker0 to do that, run docker as docker -d -b=gsbr01

$ echo 'DOCKER_OPTS="-b=gsbr01"' >> /etc/sysconfig/docker$ sudo service docker start

Check the result:

# brctl showbridge name     bridge id               STP enabled     interfacesgsbr01          8000.080027595649       no              eth0                                                        veth5806f27                                                        vethb3e33davirbr0          8000.5254004c1564       yes             virbr0-nicdocker -d -b=gsbr01