docker 容器内`ping container_name`失败

Question

docker 容器内ping 另一个容器明失败

1. 涉及容器

• qinglong
• jupyter
  qinglong里 ping jupyter

1. 失败代码

[root@iZbp18y7b5jm99960ajdloZ ~]# docker exec -it qinglong ping jupyter
ping: bad address 'jupyter'

1. 两容器正常启动

   [root@iZbp18y7b5jm99960ajdloZ ~]# docker ps -a
   CONTAINER ID   IMAGE                          COMMAND                  CREATED        STATUS                      PORTS                                        NAMES
   17dcadac93e1   zookeeper:3.4.9                "/docker-entrypoint.…"   7 hours ago    Up 7 hours                  2888/tcp, 0.0.0.0:2181->2181/tcp, 3888/tcp   zookeeper
   350c27dd6d07   jupyter/datascience-notebook   "tini -g -- start-no…"   7 weeks ago    Up 24 hours (healthy)       0.0.0.0:8888->8888/tcp                       jupyter
   287d6170e13c   whyour/qinglong:2.12           "./docker/docker-ent…"   7 weeks ago    Up 24 hours                 0.0.0.0:15700->5700/tcp                      qinglong
   b7d81a4a3fd8   redis:5.0.14                   "docker-entrypoint.s…"   2 months ago   Exited (137) 25 hours ago                                                redis
   8d34783feaa8   mysql:5.7.37                   "docker-entrypoint.s…"   2 months ago   Up 24 hours                 0.0.0.0:3306->3306/tcp, 33060/tcp            mysql2
   [root@iZbp18y7b5jm99960ajdloZ ~]# 
   

2. 两容器在同一张网卡

   [root@iZbp18y7b5jm99960ajdloZ ~]# docker network inspect bridge
   [
    {
        "Name": "bridge",
        "Id": "42ebf518e86e4ca08ee47c0a7d3839d9c23ef24d1e3511d2bdfdaf65975327f9",
        "Created": "2022-06-23T20:07:55.613373918+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "17dcadac93e10da4c52b11867c42450a99a6c4848e397a0b7cab6d1b9c142f75": {
                "Name": "zookeeper",
                "EndpointID": "713126dd4481f6cce80fd8cfaba13239807716bbbd028466b3e35a05b1cfc901",
                "MacAddress": "02:42:ac:12:00:05",
                "IPv4Address": "172.18.0.5/16",
                "IPv6Address": ""
            },
            "287d6170e13c90e9446c4988287cc0bdac06a1ec2776d208564e20b52002fc1a": {
                "Name": "qinglong",
                "EndpointID": "a987e4aacb11aab4c3b38979e2b87b75bc2abb6352dbc8dc3622b6b837c4897f",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "350c27dd6d07ab89bdd63005beb86df886cf4f660be816d10968ebd985651aea": {
                "Name": "jupyter",
                "EndpointID": "c530c13ebd5c20c2deb3d94db62701b976317d63d36576b7f21a7a08335ecae3",
                "MacAddress": "02:42:ac:12:00:04",
                "IPv4Address": "172.18.0.4/16",
                "IPv6Address": ""
            },
            "8d34783feaa8a2d8ee465d8b494b045c51e9c21f4be176dcda68b4d8ea2b293a": {
                "Name": "mysql2",
                "EndpointID": "f2d99e85aa50e79fa67f323f9b81f86db44ee8c82c84409a02f3dea68b2c56d1",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "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": {}
    }
   ]
   [root@iZbp18y7b5jm99960ajdloZ ~]# 
   

Answer 1

那张网卡是docker0，重新换一个网卡就好了