docke自定义网络之容器互联

前言
–link
自定义网络
提问

前言在前几期我们介绍了容器间的互联可以使用 –Link 参数进行设置，这样可以在容器内不只访问ip，也可以访问对应设置的域名。先温习下。操作之前先清除所有的容器。
–link# 清除所有容器$root@VM-8-11-ubuntu:~# docker stop $(docker ps -aq) && docker rm $(docker ps -aq)88f8f241ca30765ed1889bfa$root@VM-8-11-ubuntu:~# docker run -it --name=mybusy02 -d busybox82aff31e56f3913b3fa883a08ec95960eff88fc9977360a67264c0d53180844b$root@VM-8-11-ubuntu:~# docker run -it --name mybusy --link mybusy02:mybusy-net -d busyboxb77e9762314f868518f799d3c572dec0b2ce13a684de072fb9f9e925135f6459$root@VM-8-11-ubuntu:~# docker exec -it mybusy ping mybusy-netPING mybusy-net (172.17.0.2): 56 data bytes64 bytes from 172.17.0.2: seq=0 ttl=64 time=0.131 ms64 bytes from 172.17.0.2: seq=1 ttl=64 time=0.069 ms64 bytes from 172.17.0.2: seq=2 ttl=64 time=0.069 ms$root@VM-8-11-ubuntu:~# docker exec -it mybusy cat /etc/hosts127.0.0.1 localhost::1 localhost ip6-localhost ip6-loopbackfe00::0 ip6-localnetff00::0 ip6-mcastprefixff02::1 ip6-allnodesff02::2 ip6-allrouters172.17.0.2 mybusy-net 09a4b97fc09d mybusy02# 我们发现在hosts文件中加入了mybusy02172.17.0.3 c73be07d21fb我们发现是互联了，但是如果mybusy02 想ping 通 mybusy 还需要一个–link 。所以就很麻烦，而且官方也推荐我们不要使用 --link 这个参数了。
docker 0 不支持容器名访问接下来我们就到了今天的重头戏，自定义网络了。

文章插图

自定义网络# 主要涉及到的命令$root@VM-8-11-ubuntu:~# docker network --helpUsage:docker network COMMANDManage networksCommands:connectConnect a container to a networkcreateCreate a networkdisconnectDisconnect a container from a networkinspectDisplay detailed information on one or more networkslsList networkspruneRemove all unused networksrmRemove one or more networksRun 'docker network COMMAND --help' for more information on a command.# 这是默认的网络方式 brudge 就是docker 0的网桥$root@VM-8-11-ubuntu:~# docker network lsNETWORK IDNAMEDRIVERSCOPEcf05ea05d3bdbridgebridgelocal0ab28e475dc6hosthostlocale4c628cc77dbnonenulllocal我们来使用create来创建自己的网桥网络。基础
# --driver 设置network类型--subnet 设置子网/16 = 255*255 个ip 减去0.0 和 255.255 约等于65535$root@VM-8-11-ubuntu:~# docker network create --driver=bridge --subnet=192.168.0.0/16 my-net1b668a5439b207d2080d95bffe829139cfa2456d691c8019a245e7f9d5a56970root@VM-8-11-ubuntu:~# docker network lsNETWORK IDNAMEDRIVERSCOPEcf05ea05d3bdbridgebridgelocal0ab28e475dc6hosthostlocal1b668a5439b2my-netbridgelocale4c628cc77dbnonenulllocal# 查看网络信息$root@VM-8-11-ubuntu:~# docker network inspect my-net[{ "Name": "my-net", "Id": "1b668a5439b207d2080d95bffe829139cfa2456d691c8019a245e7f9d5a56970", "Created": "2021-12-01T09:47:21.410882291+08:00", "Scope": "local", "Driver": "bridge", "EnableIPv6": false, "IPAM": {"Driver": "default","Options": {},"Config": [{"Subnet": "192.168.0.0/16"}] }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": {"Network": "" }, "ConfigOnly": false, "Containers": {}, "Options": {}, "Labels": {}}]【docke自定义网络之容器互联】上面我们介绍了创建网络的方法以及查看的方法接下来看看使用的方法
# 创建mybusy 容器设置 my-net网络$root@VM-8-11-ubuntu:~# docker run -it --name mybusy --net=my-net -d busybox180fbc8b04627762a896d8a85d8cb67063c01a0f3ad8a11352ab4695b022c272# 创建mybusy02 容器设置 my-net网络 $root@VM-8-11-ubuntu:~# docker run -it --name mybusy02 --net=my-net -d busybox3c08d592537a9593c960c9664b4724521658f26be7b658a6483e6fbfe30b58a7# 在容器mybusy ping mybusy02 通了$root@VM-8-11-ubuntu:~# docker exec -it mybusy ping mybusy02PING mybusy02 (192.168.0.3): 56 data bytes64 bytes from 192.168.0.3: seq=0 ttl=64 time=0.110 ms64 bytes from 192.168.0.3: seq=1 ttl=64 time=0.070 ms这时我们发现他们两互相ping通了，这就很完美了。再来看看下面的 my-net 的网络配置
root@VM-8-11-ubuntu:~# docker network inspect my-net [{ "Name": "my-net", "Id": "1b668a5439b207d2080d95bffe829139cfa2456d691c8019a245e7f9d5a56970", "Created": "2021-12-01T09:47:21.410882291+08:00", "Scope": "local", "Driver": "bridge", "EnableIPv6": false, "IPAM": {"Driver": "default","Options": {},"Config": [{"Subnet": "192.168.0.0/16"}] }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": {"Network": "" }, "ConfigOnly": false, "Containers": {# 这时我们发现这两个容器已经加入到这个网络中了"180fbc8b04627762a896d8a85d8cb67063c01a0f3ad8a11352ab4695b022c272": {"Name": "mybusy","EndpointID": "12929182af47e619e3405cab9981ea1671a2bc31f77d3aa589ebcf2c912c12bc","MacAddress": "02:42:c0:a8:00:02","IPv4Address": "192.168.0.2/16","IPv6Address": ""},"3c08d592537a9593c960c9664b4724521658f26be7b658a6483e6fbfe30b58a7": {"Name": "mybusy02","EndpointID": "61b08372535d751cee726fc01d4e300390e2a090dba20f1d21ba96385a7a621e","MacAddress": "02:42:c0:a8:00:03","IPv4Address": "192.168.0.3/16","IPv6Address": ""} }, "Options": {}, "Labels": {}}]
提问在不同网络的配置下的容器可以互联吗？
答案是可以的。我们可以使用 docker network connect 指令，以下为操作步骤
# 首先查看当前存在同一个网络中mybusy mybusy02 两个容器$root@VM-8-11-ubuntu:~# docker ps -aCONTAINER IDIMAGECOMMANDCREATEDSTATUSPORTSNAMES3c08d592537abusybox"sh"8 minutes agoUp 8 minutesmybusy02180fbc8b0462busybox"sh"8 minutes agoUp 8 minutesmybusy# 创建一个在默认网络中的 mybusy03$root@VM-8-11-ubuntu:~# docker run -it --name mybusy03-d busyboxa95b57c96f400ed44efffcc938bccce15830fa1ab5b55716261e4588c14429cb# 查看当前的容器$root@VM-8-11-ubuntu:~# docker ps CONTAINER IDIMAGECOMMANDCREATEDSTATUSPORTSNAMESa95b57c96f40busybox"sh"21 seconds agoUp 21 secondsmybusy033c08d592537abusybox"sh"8 minutes agoUp 8 minutesmybusy02180fbc8b0462busybox"sh"9 minutes agoUp 9 minutesmybusy# 尝试从 mybusy ping mybusy03 发现是ping 不通的因为不在同一网端中$root@VM-8-11-ubuntu:~# docker exec -it mybusy ping mybusy03ping: bad address 'mybusy03'# 这时我们查看docker network connect --help 命令查看$root@VM-8-11-ubuntu:~# docker network connect --helpUsage:docker network connect [OPTIONS] NETWORK CONTAINERConnect a container to a networkOptions:--alias stringsAdd network-scoped alias for the container--driver-opt stringsdriver options for the network--ip string IPv4 address (e.g., 172.30.100.104)--ip6 stringIPv6 address (e.g., 2001:db8::33)--link list Add link to another container--link-local-ip stringsAdd a link-local address for the container# 将mybusy03 加入到 my-net 网络中$root@VM-8-11-ubuntu:~# docker network connect my-net mybusy03# 这时我们再 ping 发现通了。是不是很神奇$root@VM-8-11-ubuntu:~# docker exec -it mybusy ping mybusy03PING mybusy03 (192.168.0.4): 56 data bytes64 bytes from 192.168.0.4: seq=0 ttl=64 time=0.197 ms64 bytes from 192.168.0.4: seq=1 ttl=64 time=0.087 ms这时我们查看网络发现 mybusy03 已经加入到 my-net中去了。所以就可以ping 通了。

文章插图
到此这篇关于docke自定义网络之容器互联的文章就介绍到这了,更多相关docke容器互联内容请搜索考高分网以前的文章或继续浏览下面的相关文章希望大家以后多多支持考高分网！