most time, my work environment is behind proxy(to jump out Chixx Gateway). Now there is a problem. when we run docker run. the build will fail if we try to access the internet.
the solution is as below:
1. when you write dockerfile, you should write like this:
####################################################### # Dockerfile to build session DB proxy CI base image ####################################################### # Base image is centos 7 FROM centos:7 # Author: Max Cong MAINTAINER Max Cong <savagecm@qq.com> # Proxy variable for yum download etc to work ARG PROXY # Set http and https proxy according to PROXY argument ENV http_proxy ${PROXY:-} ENV https_proxy ${PROXY:-} # Setup a temp directory for Git repo ENV GITCACHE /var/cache/gitcache # Bash profile for root COPY ./.bash_profile /root/ # Use shell script to modify yum proxy COPY ./cfg_yum_proxy.sh / # Download and install dependent packages # for session DB proxy CI build and test RUN cp /etc/yum.conf /etc/yum.conf.ofc \ && /cfg_yum_proxy.sh $http_proxy \ && yum -y install \ boost-devel \ cmake \ gcc \ gcc-c++ \ git \ libcurl-devel \ libevent-devel \ make \ valgrind \ && mkdir -p ${GITCACHE} \ && cd ${GITCACHE} \ && git clone https://github.com/redis/hiredis.git \ && git clone https://github.com/antirez/redis.git \ && git clone https://github.com/lloyd/yajl.git \ && cd ${GITCACHE}/hiredis && make install \ && cd ${GITCACHE}/redis && make install \ && mv /etc/yum.conf.ofc /etc/yum.conf \ && rm /cfg_yum_proxy.sh \ && yum clean all # unset proxy ENV http_proxy "" ENV https_proxy "" # Setup library search path ENV LD_LIBRARY_PATH /usr/lib64:/usr/local/lib64:/usr/lib:/usr/local/lib # Useable shell CMD ["/bin/bash"] 2. the docker run command sudo docker build --build-arg PROXY="172.17.0.1:8000" . 3. the proxy should be set to the docker0 in your host machine [mcong@SessionDBProxy-CI docker]$ ifconfig docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0 inet6 fe80::42:8dff:fea5:ac95 prefixlen 64 scopeid 0x20<link> ether 02:42:8d:a5:ac:95 txqueuelen 0 (Ethernet) RX packets 60694 bytes 3190979 (3.0 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 60799 bytes 189773555 (180.9 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 why this work?the answer is docker build use the default bridge network, it is bind to docker0 in your host machine:
[mcong@SessionDBProxy-CIRAPPORT_dbwrapper]$ ifconfig
docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
{ "Name": "bridge", "Id": "5e6943bf0eeb9ad473ea45637b1e625975687a895fece756ee2f5410d2021fe4", "Created": "2017-03-07T17:06:34.371450497+08:00", "Scope": "local", "Driver": "bridge", "EnableIPv6": false, "IPAM": { "Driver": "default", "Options": null, "Config": [ { "Subnet": "172.17.0.0/16", "Gateway": "172.17.0.1" } ] }, "Internal": false, "Attachable": false, "Containers": { "150b40335fc0e322c42c994def35a83d1939323b1fa41455b66acd2702b4830b": { "Name": "blissful_snyder", "EndpointID": "e18f58f4476c6c41b1feca7ca4548d1bdafedc66639d32e521e71b0bea96399f", "MacAddress": "02:42:ac:11:00:02", "IPv4Address": "172.17.0.2/16", "IPv6Address": "" } }, "Options": { "com.docker.network.bridge.default_bridge": "true", "com.docker.network.bridge.enable_icc": "true", "com.docker.network.bridge.enable_ip_masquerade": "true", "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0", "com.docker.network.bridge.name": "docker0", "com.docker.network.driver.mtu": "1500" }, "Labels": {} }