自定义网络，网络连通

你的名字 2023-10-01 19:31 1阅读 0赞

### 自定义网络 ###

1、查看所有的docker网络  
![在这里插入图片描述][80134cbedd164d52968e8a9e77e333ed.png]  
网络模式：

bridge     桥接  （docker默认）
    none       不配置网络
    host       和宿主机共享网络
    container  容器内网络连通（用的少）

> 测试

我们直接启动的命令，默认是–net bridge，就是我们的docker0

docker run -d -P --name tomcat01 --net bridge tomcat

> docker0的特点：  
> 默认，域名不能访问，–link可以打通连接。

*  自定义一个网络

[root@iZwz9geewjuo2sogidqn50Z /]# docker network create --driver bridge --subnet 192.168.0.0/16 --gateway 192.168.0.1 mynet
    843b151756ca18297b4bc5cf48c16636c409f8bb206a85e6b2fcd56036218ada
    [root@iZwz9geewjuo2sogidqn50Z /]# docker network ls
    NETWORK ID     NAME      DRIVER    SCOPE
    a84148e01491   bridge    bridge    local
    02a82be95061   host      host      local
    843b151756ca   mynet     bridge    local
    ddfa76153018   none      null      local

查看网络信息：  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16]

[root@iZwz9geewjuo2sogidqn50Z /]# docker run -d -P --name tomcat-net01 --net mynet  tomcat
    146ed1a2921f79dc724ec5716b82377325499f1fb9d2373c83bde796d642c14c
    [root@iZwz9geewjuo2sogidqn50Z /]# docker run -d -P --name tomcat-net02 --net mynet  tomcat
    3776acfad60682df7e3005d3b389d9d932a21e2b91fe24730d6ced93afa4d5cb
    [root@iZwz9geewjuo2sogidqn50Z /]# docker network inspect mynet
    [
        {
        
            "Name": "mynet",
            "Id": "843b151756ca18297b4bc5cf48c16636c409f8bb206a85e6b2fcd56036218ada",
            "Created": "2022-02-21T22:34:48.599496723+08:00",
            "Scope": "local",
            "Driver": "bridge",
            "EnableIPv6": false,
            "IPAM": {
        
                "Driver": "default",
                "Options": {
        },
                "Config": [
                    {
        
                        "Subnet": "192.168.0.0/16",
                        "Gateway": "192.168.0.1"
                    }
                ]
            },
            "Internal": false,
            "Attachable": false,
            "Ingress": false,
            "ConfigFrom": {
        
                "Network": ""
            },
            "ConfigOnly": false,
            "Containers": {
        
                "146ed1a2921f79dc724ec5716b82377325499f1fb9d2373c83bde796d642c14c": {
        
                    "Name": "tomcat-net01",
                    "EndpointID": "a575fd0fa0bada2920e8c6bd1a4c37228dbd0e00d2ff8b1267f8bb7f308c47a7",
                    "MacAddress": "02:42:c0:a8:00:02",
                    "IPv4Address": "192.168.0.2/16",
                    "IPv6Address": ""
                },
                "3776acfad60682df7e3005d3b389d9d932a21e2b91fe24730d6ced93afa4d5cb": {
        
                    "Name": "tomcat-net02",
                    "EndpointID": "2ef979f86762e03a3b1de42a138257035c03e42ff678c4ea6f1ef3c9d8554c89",
                    "MacAddress": "02:42:c0:a8:00:03",
                    "IPv4Address": "192.168.0.3/16",
                    "IPv6Address": ""
                }
            },
            "Options": {
        },
            "Labels": {
        }
        }
    ]

再次测试ping

[root@iZwz9geewjuo2sogidqn50Z /]# docker exec -it tomcat-net01 /bin/bash
    root@146ed1a2921f:/usr/local/tomcat# ping 192.168.0.3
    PING 192.168.0.3 (192.168.0.3) 56(84) bytes of data.
    64 bytes from 192.168.0.3: icmp_seq=1 ttl=64 time=0.095 ms
    64 bytes from 192.168.0.3: icmp_seq=2 ttl=64 time=0.082 ms
    64 bytes from 192.168.0.3: icmp_seq=3 ttl=64 time=0.079 ms

不使用–link也可以ping名字

[root@iZwz9geewjuo2sogidqn50Z /]# docker exec -it tomcat-net01 /bin/bash
    root@146ed1a2921f:/usr/local/tomcat# ping tomcat-net02
    PING tomcat-net02 (192.168.0.3) 56(84) bytes of data.
    64 bytes from tomcat-net02.mynet (192.168.0.3): icmp_seq=1 ttl=64 time=0.073 ms
    64 bytes from tomcat-net02.mynet (192.168.0.3): icmp_seq=2 ttl=64 time=0.080 ms
    64 bytes from tomcat-net02.mynet (192.168.0.3): icmp_seq=3 ttl=64 time=0.102 ms
    64 bytes from tomcat-net02.mynet (192.168.0.3): icmp_seq=4 ttl=64 time=0.090 ms

好处：  
redis:不同的集群使用不同的网络，保证集群是安全和健康的  
mysql:不同的集群使用不同的网络，保证集群是安全和健康的

### 网络连通 ###

连接一个容器到一个网络：  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 1]

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 2]

> 测试打通tomcat01 -----mynet

#启动tomcat01
    [root@iZwz9geewjuo2sogidqn50Z /]# docker run -d -P --name tomcat01 tomcat
    2ef7b27090688b363cbd8b0240f2fa14b90f45b5a637b78ea3650fec69f973bd
    #启动tomcat02
    [root@iZwz9geewjuo2sogidqn50Z /]# docker run -d -P --name tomcat02 tomcat
    47adc17f6d7918db094b95cbd8a8f67a3234c6fa87c9e05543a12d47ef86a632
    [root@iZwz9geewjuo2sogidqn50Z /]# docker ps
    CONTAINER ID   IMAGE     COMMAND             CREATED          STATUS          PORTS                                         NAMES
    47adc17f6d79   tomcat    "catalina.sh run"   11 seconds ago   Up 10 seconds   0.0.0.0:49158->8080/tcp, :::49158->8080/tcp   tomcat02
    2ef7b2709068   tomcat    "catalina.sh run"   23 seconds ago   Up 22 seconds   0.0.0.0:49157->8080/tcp, :::49157->8080/tcp   tomcat01
    3776acfad606   tomcat    "catalina.sh run"   31 minutes ago   Up 31 minutes   0.0.0.0:49156->8080/tcp, :::49156->8080/tcp   tomcat-net02
    146ed1a2921f   tomcat    "catalina.sh run"   31 minutes ago   Up 31 minutes   0.0.0.0:49155->8080/tcp, :::49155->8080/tcp   tomcat-net01
    
    #connect mynet和tomcat01
    [root@iZwz9geewjuo2sogidqn50Z /]# docker network connect mynet tomcat01

查看如下：

[root@iZwz9geewjuo2sogidqn50Z /]# docker network inspect

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 3]  
连通之后，就是将tomcat01放在了mynet网络下。  
一个容器两个ip！

[root@iZwz9geewjuo2sogidqn50Z /]# docker exec -it tomcat01 /bin/bash
    root@2ef7b2709068:/usr/local/tomcat# ping tomcat-net01
    PING tomcat-net01 (192.168.0.2) 56(84) bytes of data.
    64 bytes from tomcat-net01.mynet (192.168.0.2): icmp_seq=1 ttl=64 time=0.089 ms
    64 bytes from tomcat-net01.mynet (192.168.0.2): icmp_seq=2 ttl=64 time=0.080 ms
    64 bytes from tomcat-net01.mynet (192.168.0.2): icmp_seq=3 ttl=64 time=0.077 ms

tomcat01打通tomcat-net01！

> 假设要跨网络操作，就需要使用docker network connect连通！

[80134cbedd164d52968e8a9e77e333ed.png]: https://img-blog.csdnimg.cn/80134cbedd164d52968e8a9e77e333ed.png
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/b7e7033fdee54a09a998ddeb4af2ffd2.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAd2VpeGluXzQwNzUwNjMz,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 1]: https://img-blog.csdnimg.cn/c7a7a897ae224daa953a51c0e1abf580.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAd2VpeGluXzQwNzUwNjMz,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 2]: https://img-blog.csdnimg.cn/bff9ec3c0e3e4a96bb056ff320bb2525.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAd2VpeGluXzQwNzUwNjMz,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBAd2VpeGluXzQwNzUwNjMz_size_20_color_FFFFFF_t_70_g_se_x_16 3]: https://img-blog.csdnimg.cn/33d9b027a1924c0db42dd2fc2b875faf.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAd2VpeGluXzQwNzUwNjMz,size_20,color_FFFFFF,t_70,g_se,x_16