云原生之Docker容器的网络管理

举报
江湖有缘 发表于 2022/10/23 21:42:15 2022/10/23
【摘要】 云原生之Docker容器的网络管理

一、登录华为ECS云服务器

image.png

二、检查docker环境

[root@ecs-1558 ~]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since Sun 2022-10-23 20:47:47 CST; 59s ago
     Docs: https://docs.docker.com
 Main PID: 1790 (dockerd)
    Tasks: 7
   Memory: 25.2M
   CGroup: /system.slice/docker.service
           └─1790 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.409717477+08:00" level=info msg="scheme \"unix\" not re...e=grpc
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.409728241+08:00" level=info msg="ccResolverWrapper: sen...e=grpc
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.409734336+08:00" level=info msg="ClientConn switching b...e=grpc
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.431194886+08:00" level=info msg="Loading containers: start."
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.539531805+08:00" level=info msg="Default bridge (docker...dress"
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.578799852+08:00" level=info msg="Loading containers: done."
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.593295777+08:00" level=info msg="Docker daemon" commit=....10.18
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.593380253+08:00" level=info msg="Daemon has completed i...ation"
Oct 23 20:47:47 ecs-1558 dockerd[1790]: time="2022-10-23T20:47:47.618260430+08:00" level=info msg="API listen on /var/run....sock"
Oct 23 20:47:47 ecs-1558 systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.

三、容器的host网络

1.运行host网络类型的容器

[root@ecs-1558 ~]# docker run -itd --network=host centos
Unable to find image 'centos:latest' locally
latest: Pulling from library/centos
a1d0c7532777: Pull complete 
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest
3773fe30f40d0687262128fb3096e7f9628f734d803ab4c5d7b58f67a2ab0298

2.在容器内查看网络信息

[root@ecs-1558 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS         PORTS     NAMES
3773fe30f40d   centos    "/bin/bash"   8 minutes ago   Up 8 minutes             sweet_antonelli
[root@ecs-1558 ~]# docker exec -it 3773f /bin/bash
[root@ecs-1558 /]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:23:7a:13 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.152/24 brd 192.168.0.255 scope global dynamic noprefixroute eth0
       valid_lft 85095sec preferred_lft 85095sec
    inet6 fe80::f816:3eff:fe23:7a13/64 scope link 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:7b:ff:1e:be brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
[root@ecs-1558 /]#

3.宿主机验证网络信息

[root@ecs-1558 ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:23:7a:13 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.152/24 brd 192.168.0.255 scope global noprefixroute dynamic eth0
       valid_lft 85054sec preferred_lft 85054sec
    inet6 fe80::f816:3eff:fe23:7a13/64 scope link 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:7b:ff:1e:be brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever

4.host网络类型总结

当容器使用host网络模型，容器和宿主机共享网络namespace，因此网络信息完全一致。

四、容器的bridge网络

1.运行bridge网络类型的容器

[root@ecs-1558 ~]# docker run -itd --network=bridge centos
5fa70b91496e84ace5f2810c48ee2d02596ad404d53ac329d42120b05934ee23

2.查看容器内网络

[root@ecs-1558 ~]# docker exec -it 5fa7 /bin/bash
[root@5fa70b91496e /]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
4: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

3.查看宿主机中默认bridge网络信息

[root@ecs-1558 ~]# docker network inspect bridge 
[
    {
        "Name": "bridge",
        "Id": "ab0ec44cdda6793472ab8d1017d5541c07de7644395233f327962326bb2df5c5",
        "Created": "2022-10-23T20:47:47.539554084+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.17.0.0/16"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "5fa70b91496e84ace5f2810c48ee2d02596ad404d53ac329d42120b05934ee23": {
                "Name": "pensive_saha",
                "EndpointID": "9c85f5aec61d08fa81c63eb7e01ff80e0bab6d7ef0a13c5a136cb4a409a2e5f8",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            }
        },
        "Options": {
            "com.docker.network.bridge.default_bridge": "true",
            "com.docker.network.bridge.enable_icc": "true",
            "com.docker.network.bridge.enable_ip_masquerade": "true",
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
            "com.docker.network.bridge.name": "docker0",
            "com.docker.network.driver.mtu": "1500"
        },
        "Labels": {}
    }
]

五、自定义bridge类型的网络

1.自定义bridge类型的网络

[root@ecs-1558 ~]# docker network create --driver bridge --subnet 173.18.0.0/16 --gateway 173.18.0.1 servicebridge01
d245c744d34ea7d6c5ecc8aed885076db2d99f93cd2b505df21ecef3ba331f2a

2.查看自定义网络详细信息

[root@ecs-1558 ~]# docker network inspect d245c744d
[
    {
        "Name": "servicebridge01",
        "Id": "d245c744d34ea7d6c5ecc8aed885076db2d99f93cd2b505df21ecef3ba331f2a",
        "Created": "2022-10-23T21:08:22.767835724+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "173.18.0.0/16",
                    "Gateway": "173.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

3.使用自定义网络运行容器test01

[root@ecs-1558 ~]# docker run -itd --name test01--network=servicebridge01 centos
bc66fd869ffbcdf6478e60683616693d2449e3ac80c4821a979804082c6df9d3

六、测试brideg类型的容器互通情况

1.创建一个默认网络的容器test02

[root@ecs-1558 ~]# docker run -itd  --name test02 centos
97ed154879a674662d21c99b2ae6c787cacb2fc4696bd05432e1489c60a8ec56

2.进入test02容器查看IP地址

[root@ecs-1558 ~]# docker exec -it 97e /bin/bash
[root@97ed154879a6 /]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
9: eth0@if10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

3.查看test01容器的IP

[root@ecs-1558 ~]# docker exec -it bc66 /bin/bash
[root@bc66fd869ffb /]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
7: eth0@if8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ad:12:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 173.18.0.2/16 brd 173.18.255.255 scope global eth0
       valid_lft forever preferred_lft forever

4.将自定义servicebridge01网络挂载到test02

[root@ecs-1558 ~]# docker network connect 97ed154879a6 bc66fd869ffb

5.查看test02容器的ip

[root@ecs-1558 ~]# docker exec -it 97e /bin/bash
[root@97ed154879a6 /]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
9: eth0@if10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever
11: eth1@if12: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:ad:12:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 173.18.0.3/16 brd 173.18.255.255 scope global eth1
       valid_lft forever preferred_lft forever
[root@97ed154879a6 /]#

6.查看两个容器互通情况

[root@97ed154879a6 /]# ping 173.18.0.2 -c 8
PING 173.18.0.2 (173.18.0.2) 56(84) bytes of data.
64 bytes from 173.18.0.2: icmp_seq=1 ttl=64 time=0.064 ms
64 bytes from 173.18.0.2: icmp_seq=2 ttl=64 time=0.043 ms
64 bytes from 173.18.0.2: icmp_seq=3 ttl=64 time=0.042 ms
64 bytes from 173.18.0.2: icmp_seq=4 ttl=64 time=0.044 ms
64 bytes from 173.18.0.2: icmp_seq=5 ttl=64 time=0.043 ms
64 bytes from 173.18.0.2: icmp_seq=6 ttl=64 time=0.056 ms
64 bytes from 173.18.0.2: icmp_seq=7 ttl=64 time=0.043 ms
64 bytes from 173.18.0.2: icmp_seq=8 ttl=64 time=0.045 ms

--- 173.18.0.2 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7000ms
rtt min/avg/max/mdev = 0.042/0.047/0.064/0.010 ms
[root@97ed154879a6 /]#
【版权声明】本文为华为云社区用户原创内容，转载时必须标注文章的来源（华为云社区）、文章链接、文章作者等基本信息， 否则作者和本社区有权追究责任。如果您发现本社区中有涉嫌抄袭的内容，欢迎发送邮件进行举报，并提供相关证据，一经查实，本社区将立刻删除涉嫌侵权内容，举报邮箱： cloudbbs@huaweicloud.com
Docker 云原生 网络
  • 点赞
  • 收藏
  • 关注作者

评论（0）

0/1000
抱歉，系统识别当前为高风险访问，暂不支持该操作

全部回复

上滑加载中

设置昵称

在此一键设置昵称，即可参与社区互动！

*长度不超过10个汉字或20个英文字符，设置后3个月内不可修改。

*长度不超过10个汉字或20个英文字符，设置后3个月内不可修改。

确认 取消

加入云驻计划，成为创作者

  • 华为云周边好礼
  • 免费体验产品
  • 特殊身份标识
  • 线下官方门票
  • 内部专家零距离
  • 与10000+优质创作者共同成长
立即加入