How to connect to docker container from browser on host? - networking

Question

I am using Docker for Mac 1.12.0-rc4-beta19.
The container built with following dockerfile and docker-compose.yml.
I want to connect to 1344 port of container from host os browser with http://localhost:1344.
But connection be fail.
I am using 1344 of container to test of bottle (python lightweight web framework) application
Why cannot connect to container's port from host?
docker-compose.yml:
version: '2'
services:
datastore:
image: busybox:latest
volumes:
- ./share:/share_to_container
### base (ubuntu)
base:
build: ./
ports:
- "127.0.0.1:1344:1344"
- "8000:8000"
volumes:
- ./app:/app
volumes_from:
- datastore
links:
- db
- webserver
db:
build:
context: .
dockerfile: "mysqlfile"
environment:
- MYSQL_ROOT_PASSWORD=mypassword
ports:
- "3306:3306"
volumes:
- ./mysql:/mysql
volumes_from:
- datastore
webserver:
image: nginx
ports:
- "8080:80"
volumes:
- ./nginx/mysite.template:/etc/nginx/conf.d/mysite.template
volumes_from:
- datastore
Edit:
The port 8080 connection is correctly, But 1344 is fail
The following is full Dockerfile for base service
Dockerfile_for_base:
from ubuntu:latest
maintainer myname
run mkdir ~/app
copy vim /root/.vim
copy vimrc /root/.vimrc
#update
run apt-get update
run apt-get -y update
run apt-get -y install libssl-dev
run apt-get -yf install curl
run apt-get -y install mysql-client
run apt-get -y install clang
run apt-get -y install lldb
run apt-get -y install make
run apt-get -y install libsqlite3-dev
run apt-get -y install man
run apt-get -y install vim
run apt-get -y install git
run apt-get -y install pkg-config
run apt-get -y install zip
run apt-get -y install unzip
run apt-get -y install language-pack-ja-base
run apt-get -y install language-pack-ja
run apt-get -y install language-pack-en-base
run apt-get -y install language-pack-en
run apt-get -y install fcitx-mozc
run apt-get -y install libreadline-dev
# setting locale to japanese
run update-locale LANG=ja_JP.UTF-8 LANGUAGE=ja_JP:ja
env LANG ja_JP.UTF-8
env LC_CTYPE ja_JP.UTF-8
env LC_MESSAGES en_US.UTF-8
run im-config -n fcitx
# end of locale settings
# install latest python3 and some python packages (https://github.com/docker-library/python/blob/3db904b3f5407840e591daf3aa54670a685b22b3/3.5/Dockerfile)
ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
ENV PYTHON_VERSION 3.5.2
# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
ENV PYTHON_PIP_VERSION 8.1.2
RUN set -ex \
&& curl -fSL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" -o python.tar.xz \
&& curl -fSL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" -o python.tar.xz.asc \
&& export GNUPGHOME="$(mktemp -d)" \
&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
&& rm -r "$GNUPGHOME" python.tar.xz.asc \
&& mkdir -p /usr/src/python \
&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
&& rm python.tar.xz \
\
&& cd /usr/src/python \
&& ./configure \
--enable-loadable-sqlite-extensions \
--enable-shared \
&& make -j$(nproc) \
&& make install \
&& ldconfig \
&& pip3 install --no-cache-dir --upgrade pip==$PYTHON_PIP_VERSION \
&& [ "$(pip list | awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
&& find /usr/local -depth \
\( \
\( -type d -a -name test -o -name tests \) \
-o \
\( -type f -a -name '*.pyc' -o -name '*.pyo' \) \
\) -exec rm -rf '{}' + \
&& rm -rf /usr/src/python ~/.cache
# make some useful symlinks that are expected to exist
RUN cd /usr/local/bin \
&& ln -s easy_install-3.5 easy_install \
&& ln -s idle3 idle \
&& ln -s pydoc3 pydoc \
&& ln -s python3 python \
&& ln -s python3-config python-config
# end of latest python installation
#install some packages
run pip --no-cache-dir install bottle
run pip --no-cache-dir install feedparser
run pip --no-cache-dir install PyMySQL
run pip --no-cache-dir install -U pip
run pip --no-cache-dir install -U setuptools
#prompt and compiler environment variables
env CC clang
env CXX clang++
run echo 'export PS1="\h:\W \u$ "' >> ~/.bashrc
# git config
run git config --global user.name "myusername"
run git config --global user.email "my#email.address"
run git config --global color.ui true
run git config --global core.editor vim
expose 1000
expose 2000
expose 3000
expose 4000
expose 5000
expose 1344
cmd bash

Answer 1

If by "host os browser" you mean your Mac, you certainly need to remove the host from the port mapping as suggested. The reason you can't connect is the actual Docker host is a (xhyve) Virtual Machine running between your Mac and Docker. Docker will automatically publish the port between your Mac and the container like you have it, just remove the host, i.e., - "1344:1344"
(Fyi, in your setup as-is you would need to connect via the VM host which doesn't really help you.)
If you still have problems, post any errors and steps to reproduce.

Answer 2

So, after you posted your Dockerfile, it doesn't look like you're running anything? You have the CMD action set to bash and are not overriding it in your docker-compose.yml. I'm a little surprised the container is up at all (since it would just run bash and exit).
Are these files complete?
As an aside, you may want to reformat / lint your Dockerfile for best practises.

Answer 3

Did you see this forum topic?
So just run a container and call ˋifconfigˋ command. Example of output:
bash-4.3# ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:02
inet addr:172.17.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe11:2%32738/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:508 (508.0 B) TX bytes:508 (508.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1%32738/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
So IP of VM from example is 172.17.0.2