Configuring the container interconnect between multiple Docker hosts

If Docker technology is to be used on a large scale in production and test environments , it is first necessary to solve the problem of interconnection of Docker containers built by different physical machines . This article describes the configuration of the Docker container interconnect on different physical servers using open vswitch in the centos7 environment .

Environment Introduction:

Server1:192.168.115.5/24

Server2:192.168.115.6/24

One: install Docker on Server1 and Server2 and start the service separately in rpm mode

# Yum list *docker*# yum-y install docker# service Docker startredirecting to/bin/systemctl start Docker.service

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Two : Install open vswitch on Server1 and Server2 respectively

# yum -y install wget openssl-devel kernel-devel# yum groupinstall   "Development tools" # adduser ovswitch# su - ovswitch$ wget http ://openvswitch.org/releases/openvswitch-2.3.0.tar.gz$ tar -zxvpf openvswitch-2.3.0.tar.gz  $ mkdir -p ~/rpmbuild/sources$ sed  ' s/openvswitch-kmod, //g '   openvswitch-2.3.0/rhel/openvswitch.spec > openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec$  cp openvswitch-2.3.0.tar.gz rpmbuild/sources/ $ rpmbuild -bb --without  check ~/openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec $ exit # yum  Localinstall /home/ovswitch/rpmbuild/rpms/x86_64/openvswitch-2.3.0-1.x86_64.rpm #  mkdir  /etc/openvswitch# setenforce 0 # systemctl start openvswitch.service#  systemctl  status openvswitch.sErvice -l 

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Three: in the Server1 and the Server2 build OVS Bridge on the and Configure Routing

server1: docker container intranet ip Span style= "font-family: ' The song Body '; > NET segment 172.17.1.0/24

# cat /proc/sys/net/ipv4/ip_forward 1# ovs-vsctl  add-br obr0# ovs-vsctl add-port obr0 gre0 -- set Interface  gre0 type=gre options:remote_ip=192.168.115.5  # brctl addbr kbr0 #  brctl addif kbr0 obr0 # ip link set dev docker0 down  # ip link del dev docker0 # vi /etc/sysconfig/network-scripts/ Ifcfg-kbr0onboot=yesbootproto=staticipaddr=172.17.1.1netmask=255.255.255.0gateway=172.17.1.0userctl=notype= Bridgeipv6init=no # cat /etc/sysconfig/network-scripts/route-ens32 172.17.2.0/24 via  192.168.115.6 dev ens32# systemctl  restart network.service 

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Server2:docker Container Intranet IP network segment 172.17.2.0/24

# cat /proc/sys/net/ipv4/ip_forward 1# ovs-vsctl  add-br obr0# ovs-vsctl add-port obr0 gre0 -- set Interface  gre0 type=gre options:remote_ip=192.168.115.6  # brctl addbr kbr0 #  brctl addif kbr0 obr0 # ip link set dev docker0 down  # ip link del dev docker0 # vi /etc/sysconfig/network-scripts/ Ifcfg-kbr0onboot=yesbootproto=staticipaddr=172.17.2.1netmask=255.255.255.0gateway=172.17.2.0userctl=notype= Bridgeipv6init=no # cat /etc/sysconfig/network-scripts/route-ens32 172.17.1.0/24 via  192.168.115.5 dev ens32 # systemctl  restart network.service 

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Four : start the container test

Server1 and Server2 Modify Docker-initiated virtual NIC bindings to Kbr0, restart Docker process

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Server1:

# docker Run-idt--name test1 Registry.fjhb.cn/centos6/bin/bash

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Server2:

# docker Run-idt--name test2 Registry.fjhb.cn/centos6/bin/bash

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Server1:

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This article from "Chop Month" blog, declined reprint!

Configuring the container interconnect between multiple Docker hosts