docker的四种网络模式
Posted Frankiee
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/* 1. host模式 ： docker run 使用 --net=host指定 docker使用的网络实际上和宿主机一样 2. container模式： 使用 --net=container:container_id/container_name 多个容器使用共同的网络，看到的ip是一样的。 3. none 模式 使用 --net=none指定 这种模式下，不会配置任何网络。 4. bridge模式 使用 --net=bridge指定 默认模式，不会指定 此模式会为每个容器分配一个独立的network namespace */
/* 外部网络访问容器 ：外部的用户要访问容器，先将容器的ip映射出去，然后客户利用宿主机的ip来访问*/ [[email protected] /]# yum install -y httpd //虽然报错，但是httpd已经启动 [[email protected] /]# /usr/sbin/httpd AH00558: httpd: Could not reliably determine the server‘s fully qualified domain name, using 172.17.0.3. Set the ‘ServerName‘ directive globally to suppress this message [[email protected] /]# ps aux|grep httpd root 111 0.1 0.3 221856 3480 ? Ss 11:41 0:00 /usr/sbin/httpd apache 112 0.0 0.2 221856 2632 ? S 11:41 0:00 /usr/sbin/httpd apache 113 0.0 0.2 221856 2632 ? S 11:41 0:00 /usr/sbin/httpd apache 114 0.0 0.2 221856 2632 ? S 11:41 0:00 /usr/sbin/httpd apache 115 0.0 0.2 221856 2632 ? S 11:41 0:00 /usr/sbin/httpd apache 116 0.0 0.2 221856 2632 ? S 11:41 0:00 /usr/sbin/httpd root 118 0.0 0.0 8988 812 ? S+ 11:41 0:00 grep --color=auto httpd /* ！！！！但对于外部来说，是无法访问容器里的httpd的 */ //先利用容器生成镜像 [[email protected] ~]# docker commit -m "centos_with_httpd" -a "frankie" 30c centos_with_httpd:frankie fb83cd744da57dba7fb3e5bf861bd0d014da7508b8f47adeb1a3fd4ac01252ed [[email protected] ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos_with_httpd frankie fb83cd744da5 2 minutes ago 325.8 MB // -p 可以指定端口映射 [[email protected] ~]# docker run -itd -p 5123:80 centos_with_httpd:frankie bash 3f043c0dc5b456e53ff040d53d1455cbaa6bedad7d35954be3718a859bea8c24 //进入映射了端口的容器里 [[email protected] ~]# docker exec -it 3f0 bash //启动httpd服务 [[email protected] /]# /usr/sbin/httpd AH00558: httpd: Could not reliably determine the server‘s fully qualified domain name, using 172.17.0.12. Set the ‘ServerName‘ directive globally to suppress this message [[email protected] /]# ps aux|grep httpd root 33 0.1 0.3 221856 3508 ? Ss 11:55 0:00 /usr/sbin/httpd apache 34 0.0 0.2 221856 2632 ? S 11:55 0:00 /usr/sbin/httpd apache 35 0.0 0.2 221856 2632 ? S 11:55 0:00 /usr/sbin/httpd apache 36 0.0 0.2 221856 2632 ? S 11:55 0:00 /usr/sbin/httpd apache 37 0.0 0.2 221856 2632 ? S 11:55 0:00 /usr/sbin/httpd apache 38 0.0 0.2 221856 2632 ? S 11:55 0:00 /usr/sbin/httpd root 40 0.0 0.0 8988 812 ? S+ 11:55 0:00 grep --color=auto httpd //成功启动httpd，所以可以连接到 [[email protected] /]# curl localhost <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html><head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Apache HTTP Server Test Page powered by CentOS</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <!-- Bootstrap --> <link href="/noindex/css/bootstrap.min.css" rel="stylesheet"> <link rel="stylesheet" href="noindex/css/open-sans.css" type="text/css" /> <style type="text/css"><!-- ... ... [[email protected] /]# vi /var/www/html/1.html [[email protected] /]# curl localhost/1.html frankielinux.com [[email protected] /]# exit //回到宿主机 ，查看docker的ip [[email protected] ~]# ifconfig docker0 Link encap:Ethernet HWaddr 12:90:97:4F:79:75 inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0 inet6 addr: fe80::e443:adff:fe6d:3b2/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:11858 errors:0 dropped:0 overruns:0 frame:0 TX packets:30521 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:480913 (469.6 KiB) TX bytes:41003387 (39.1 MiB) //通过httpd连接，则可以在外部连接容器 [[email protected] ~]# curl 172.17.42.1:5123/1.html frankielinux.com //这个容器有端口映射 [[email protected] ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3f043c0dc5b4 centos_with_httpd:frankie "bash" 10 minutes ago Up 10 minutes 0.0.0.0:5123->80/tcp boring_ardinghelli
/* 容器互联 */ /* 所以可以开启一个新的容器， 用Centos6的镜像来做一个容器--然后来用yum源来安装mysql */ [[email protected] ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos_with_httpd frankie fb83cd744da5 About an hour ago 325.8 MB centos-6-x86 latest c37f3636c1f8 21 hours ago 343.8 MB centos_with_net latest c5b412fe1c33 22 hours ago 294.1 MB centos latest d83a55af4e75 4 weeks ago 196.7 MB frankie latest d83a55af4e75 4 weeks ago 196.7 MB registry latest ad8da6d14f6d 4 weeks ago 33.28 MB [[email protected] ~]# docker run -itd centos-6-x86 bash faaa5d792a21f3735e4ade09a9767ab90a54c13b19084a9b004b4dd595615310 [[email protected] ~]# docker exec -it faaa bash [[email protected] /]# yum install -y mysql-server Loaded plugins: fastestmirror Setting up Install Process base | 3.7 kB 00:00 base/primary_db | 4.7 MB 00:06 extras | 3.4 kB 00:00 extras/primary_db | 37 kB 00:00 [[email protected] /]# /etc/init.d/mysqld start Initializing MySQL database: Installing MySQL system tables... OK Filling help tables... OK [[email protected] /]# netstat -lnp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN - Active UNIX domain sockets (only servers) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ACC ] STREAM LISTENING 27434 - /var/lib/mysql/mysql.sock [[email protected] /]# exit [[email protected] ~]# docker commit -m "centos_with_mysql" -a "frankie" faaa centos6_with_mysql 5c15987b3c3ac435be66b773410384bd2b17e4ac640876ab0687a931ee1bb0fb [[email protected] ~]# docker run -itd -p 13306:3306 centos6_with_mysql bash afbe47d822beccbb74bd379974b9f2507ac56c2c71a176ab41aceaa7b269aed4 [[email protected] ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED PORTS NAMES afbe47d822be centos6_with_mysql "bash" 5 seconds ag 0.0.0.0:13306->3306/tcp ecstatic_sinoussi [[email protected] ~]# docker run -itd -p 18080:80 --name web --link ecstatic_sinou ssi:db centos_with_httpd:frankie a21afaa4da5bcb8c6197bf781a6731cfaf28a853a06fe865225a9897f1eb743d [[email protected] ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a21afaa4da5b centos_with_httpd:frankie "bash" 15 seconds a go Up 9 seconds 0.0.0.0:18080->80/tcp web [[email protected] ~]# docker exec -it web bash [[email protected] /]# ping db PING db (172.17.0.14) 56(84) bytes of data. 64 bytes from db (172.17.0.14): icmp_seq=1 ttl=64 time=22.1 ms 64 bytes from db (172.17.0.14): icmp_seq=2 ttl=64 time=0.065 ms ^C --- db ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1002ms rtt min/avg/max/mdev = 0.065/11.105/22.146/11.041 ms [[email protected] /]# cat /etc/hosts 172.17.0.15 a21afaa4da5b 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.14 db afbe47d822be ecstatic_sinoussi
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