1、本文介紹centos7下的docker容器互聯及端口映射問題

環境介紹：

????docker1:192.168.1.230

????docker2:192.168.1.231

a.兩臺宿主分別更改主機名docker1 ?and ?docker2

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#?hostnamectl?set-hostname?docker1 #?reboot

b.在docker1和docker2上分別用yum方式安裝docker并啟動服務

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[root@docker1?~]#?yum?-y?install?docker [root@docker1?~]#?service?docker?start Redirecting?to?/bin/systemctl?start??docker.service 通過ps?-ef?|?grep?docker?查看進程已經啟動

c.在docker1和docker2上分別安裝open?vswitch及依賴環境

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[root@docker1?~]#?yum?-y?install?openssl-devel?kernel-devel [root@docker1?~]#??yum?groupinstall?"Development?Tools" [root@docker1?~]#?adduser?ovswitch [root@docker1?~]#?su?-?ovswitch [ovswitch@docker1?~]$?wget?[ovswitch@docker1?~]$?tar?-zxvpf?openvswitch-2.3.0.tar.gz??? [ovswitch@docker1?~]$?mkdir?-p?~/rpmbuild/SOURCES [ovswitch@docker1?~]$?sed?'s/openvswitch-kmod,?//g'?openvswitch-2.3.0/rhel/openvswitch.spec?>?openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec [ovswitch@docker1?~]$?cp?openvswitch-2.3.0.tar.gz?rpmbuild/SOURCES/ [ovswitch@docker1?~]$?rpmbuild?-bb?--without?check?~/openvswitch-2.3.0/rhel/openvswitch_no_kmod.spec [ovswitch@docker1?~]$?exit [root@docker1?~]#?yum?localinstall?/home/ovswitch/rpmbuild/RPMS/x86_64/openvswitch-2.3.0-1.x86_64.rpm [root@docker1?~]#?systemctl?start?openvswitch.service????????#?啟動ovs [root@docker1?~]#?systemctl??status?openvswitch.service?-l???#查看服務狀態 鈼[0m?openvswitch.service?-?LSB:?Open?vSwitch?switch ???Loaded:?loaded?(/etc/rc.d/init.d/openvswitch) ???Active:?active?(running)?since?Fri?2016-04-22?02:37:10?EDT;?9s?ago ?????Docs:?man:systemd-sysv-generator(8) ??Process:?24616?ExecStart=/etc/rc.d/init.d/openvswitch?start?(code=exited,?status=0/SUCCESS) ???CGroup:?/system.slice/openvswitch.service ???????????鈹溾攢24640?ovsdb-server:?monitoring?pid?24641?(healthy)???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????鈹溾攢24641?ovsdb-server?/etc/openvswitch/conf.db?-vconsole:emer?-vsyslog:err?-vfile:info?--remote=punix:/var/run/openvswitch/db.sock?--private-key=db:Open_vSwitch,SSL,private_key?--certificate=db:Open_vSwitch,SSL,certificate?--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert?--no-chdir?--log-file=/var/log/openvswitch/ovsdb-server.log?--pidfile=/var/run/openvswitch/ovsdb-server.pid?--detach?--monitor ???????????鈹溾攢24652?ovs-vswitchd:?monitoring?pid?24653?(healthy)???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????鈹斺攢24653?ovs-vswitchd?unix:/var/run/openvswitch/db.sock?-vconsole:emer?-vsyslog:err?-vfile:info?--mlockall?--no-chdir?--log-file=/var/log/openvswitch/ovs-vswitchd.log?--pidfile=/var/run/openvswitch/ovs-vswitchd.pid?--detach?--monitor Apr?22?02:37:10?docker1?openvswitch[24616]:?/etc/openvswitch/conf.db?does?not?exist?...?(warning). Apr?22?02:37:10?docker1?openvswitch[24616]:?Creating?empty?database?/etc/openvswitch/conf.db?[??OK??] Apr?22?02:37:10?docker1?openvswitch[24616]:?Starting?ovsdb-server?[??OK??] Apr?22?02:37:10?docker1?ovs-vsctl[24642]:?ovs|00001|vsctl|INFO|Called?as?ovs-vsctl?--no-wait?--?init?--?set?Open_vSwitch?.?db-version=7.6.0 Apr?22?02:37:10?docker1?ovs-vsctl[24647]:?ovs|00001|vsctl|INFO|Called?as?ovs-vsctl?--no-wait?set?Open_vSwitch?.?ovs-version=2.3.0?"external-ids:system-id=\"7469bdac-d8b0-4593-b300-fd0931eacbc2\""?"system-type=\"unknown\""?"system-version=\"unknown\"" Apr?22?02:37:10?docker1?openvswitch[24616]:?Configuring?Open?vSwitch?system?IDs?[??OK??] Apr?22?02:37:10?docker1?openvswitch[24616]:?Inserting?openvswitch?module?[??OK??] Apr?22?02:37:10?docker1?openvswitch[24616]:?Starting?ovs-vswitchd?[??OK??] Apr?22?02:37:10?docker1?openvswitch[24616]:?Enabling?remote?OVSDB?managers?[??OK??] Apr?22?02:37:10?docker1?systemd[1]:?Started?LSB:?Open?vSwitch?switch.

d.在docker1和docker2分別建立橋接網卡和路由

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[root@docker1?~]#?cat?/proc/sys/net/ipv4/ip_forward 1 [root@docker1?~]#?ovs-vsctl?add-br?obr0 [root@docker1?~]#?ovs-vsctl?add-port?obr0?gre0?--?set?Interface?gre0?type=gre?options:remote_ip=192.168.1.230 [root@docker1?~]#?brctl?addbr?kbr0 [root@docker1?~]#?brctl?addif?kbr0?obr0? [root@docker1?~]#?ip?link?set?dev?docker0?down [root@docker1?~]#?ip?link?del?dev?docker0 [root@docker1?~]#?vi?/etc/sysconfig/network-scripts/ifcfg-kbr0 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.100.10 NETMASK=255.255.255.0 GATEWAY=192.168.100.0 USERCTL=no TYPE=Bridge IPV6INIT=no DEVICE=kbr0 [root@docker1?~]#?cat??/etc/sysconfig/network-scripts/route-eth0 192.168.101.0/24?via?192.168.1.231?dev?eth0~???????????? [root@docker1?~]#?systemctl??restart?network.service?????? [root@docker1?~]#?route?-n Kernel?IP?routing?table Destination?????Gateway?????????Genmask?????????Flags?Metric?Ref????Use?Iface 0.0.0.0?????????192.168.1.2?????0.0.0.0?????????UG????100????0????????0?eth0 169.254.0.0?????0.0.0.0?????????255.255.0.0?????U?????1002???0????????0?eth0 169.254.0.0?????0.0.0.0?????????255.255.0.0?????U?????1007???0????????0?kbr0 192.168.1.0?????0.0.0.0?????????255.255.255.0???U?????100????0????????0?eth0 192.168.100.0???0.0.0.0?????????255.255.255.0???U?????0??????0????????0?kbr0 192.168.101.0???192.168.1.231???255.255.255.0???UG????0??????0????????0?eth0 192.168.101.0???192.168.1.231???255.255.255.0???UG????100????0????????0?eth0

c.虛擬網卡綁定kbr0后下載容器啟動測試

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[root@docker1?~]#?vi?/etc/sysconfig/docker-network? #?/etc/sysconfig/docker-network DOCKER_NETWORK_OPTIONS="-b=kbr0" [root@docker1?~]#?service??docker?restart Redirecting?to?/bin/systemctl?restart??docker.service 下載鏡像： [root@docker1?~]#?docker?search?centos [root@docker1?~]#?docker?pull? [root@docker1?~]#?docker?run?-dti?--name=mytest2?docker.io/nickistre/centos-lamp?/bin/bash???????? [root@docker1?~]#?docker?ps?-l??????#查看容器的狀態 CONTAINER?ID????????IMAGE???????????????????????????????COMMAND?????????????CREATED?????????????STATUS??????????????PORTS?????????????????????NAMES 118479ccdebb????????docker.io/nickistre/centos-lamp???"/bin/bash"?????????16?minutes?ago??????Up?About?a?minute???22/tcp,?80/tcp,?443/tcp???mytest1 [root@docker1?~]#?docker?attach?118479ccdebb???????????#進入容器 [root@118479ccdebb?~]#?ifconfig????#容器自動分配的一個ip地址 eth0??????Link?encap:Ethernet??HWaddr?02:42:C0:A8:64:01?? ??????????inet?addr:192.168.100.1??Bcast:0.0.0.0??Mask:255.255.255.0 ??????????inet6?addr:?fe80::42:c0ff:fea8:6401/64?Scope:Link ??????????UP?BROADCAST?RUNNING?MULTICAST??MTU:1500??Metric:1 ??????????RX?packets:7112?errors:0?dropped:0?overruns:0?frame:0 ??????????TX?packets:3738?errors:0?dropped:0?overruns:0?carrier:0 ??????????collisions:0?txqueuelen:0? ??????????RX?bytes:12175213?(11.6?MiB)??TX?bytes:249982?(244.1?KiB) lo????????Link?encap:Local?Loopback?? ??????????inet?addr:127.0.0.1??Mask:255.0.0.0 ??????????inet6?addr:?::1/128?Scope:Host ??????????UP?LOOPBACK?RUNNING??MTU:65536??Metric:1 ??????????RX?packets:1?errors:0?dropped:0?overruns:0?frame:0 ??????????TX?packets:1?errors:0?dropped:0?overruns:0?carrier:0 ??????????collisions:0?txqueuelen:0? ??????????RX?bytes:28?(28.0?b)??TX?bytes:28?(28.0?b) [root@118479ccdebb?~]#?ping?192.168.101.1??????#101.1位docker2的容器的ip地址 PING?192.168.101.1?(192.168.101.1)?56(84)?bytes?of?data. 64?bytes?from?192.168.101.1:?icmp_seq=1?ttl=62?time=1.30?ms 64?bytes?from?192.168.101.1:?icmp_seq=2?ttl=62?time=0.620?ms 64?bytes?from?192.168.101.1:?icmp_seq=3?ttl=62?time=0.582?ms 至此不同宿主下面的容器就能互相通信了?，那么如何通過宿主ip訪問容器里面的業務呢呢，，

d.通過Dockerfile構建鏡像

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[root@docker1?~]#?cat?Dockerfile? #基本鏡像 FROM?docker.io/nickistre/centos-lamp #作者 MAINTAINER?PAIPX #RUN命令 ADD??apache-tomcat-6.0.43?/usr/local/apache-tomcat-6.0.43 RUN??cd?/usr/local/?&&?mv?apache-tomcat-6.0.43?tomcat ADD??jdk-6u22-linux-x64.bin?/root/ RUN??cd?/root/?&&?chmod?+x?jdk-6u22-linux-x64.bin?&&?./jdk-6u22-linux-x64.bin?&&?mkdir?-p?/usr/java/?&&?cp??jdk1.6.0_22?/usr/java/jdk?-a #構建環境變量 ENV?JAVA_HOME?/usr/java/jdk ENV?CLASSPATH?$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib ENV?PATH?$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin ENV?CATALINA_HOME?/usr/local/tomcat ENV?PATH?$CATALINA_HOME/bin:$PATH RUN?mkdir?-p?"$CATALINA_HOME" WORKDIR??$ #暴露端口 EXPOSE??8080 CMD?[?"catalina.sh",?"run"]

build重構一個鏡像

1	[root@docker1?~]#?docker?build?-t?tomcat2?.

啟動一個容器

1	[root@docker1?~]#?docker?run?-dti?-p?8000:8080?--name=mytest4?tomcat2

然后通過http://ip:8000訪問即可

本文轉自 Anonymous123 51CTO博客，原文鏈接:http://blog.51cto.com/woshitieren/1766830

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