I have 2 containers configured to run an application which communicates with each other. the docker-compose.yaml file looks like this :-
version: "2"
services:
node1:
image: docker_app1
command: tail -F anything
ports:
- "5500:5500"
node2:
image: docker_app2
command: tail -F anything
depends_on:
- node1
i run the application and started the communication between the 2 apps via port 5500 and i can see both container connected to the bridge network.
$ sudo docker network inspect dm_default
[
{
"Name": "dm_default",
"Id": "7680f509b5634217c2402d52675dede9469bfd8e45838005d6543ed0c0160a75",
"Created": "2021-01-09T12:39:55.567336Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.20.0.0/16",
"Gateway": "172.20.0.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"cb061a4e71d9e235675b32583ef8be20f96e88731d84d97285c362477e179747": {
"Name": "node1",
"EndpointID": "acb6b5441391b70b943bf1f5e69f224ebe7346dee56f02842918f3ea558fa321",
"MacAddress": "02:42:ac:14:00:02",
"IPv4Address": "172.20.0.2/16",
"IPv6Address": ""
},
"d74c5daf1dbd95cae307ad57ced0816fd8b8bf4ea7f52f2a8d5fdd4fa9db2fa2": {
"Name": "node2",
"EndpointID": "e49f683ab1f8042325402ddfd7a96f6c430c19966581e10035a634ecb706a0bd",
"MacAddress": "02:42:ac:14:00:03",
"IPv4Address": "172.20.0.3/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "dm",
"com.docker.compose.version": "1.27.4"
}
}
]
I want to simulate a network disconnection on one of the container so i did
$ sudo docker network disconnect dm_default node2
and i verified that the node2 container is not in the network anymore
$ sudo docker network inspect dm_default
[
{
"Name": "dm_default",
"Id": "7680f509b5634217c2402d52675dede9469bfd8e45838005d6543ed0c0160a75",
"Created": "2021-01-09T12:39:55.567336Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.20.0.0/16",
"Gateway": "172.20.0.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"cb061a4e71d9e235675b32583ef8be20f96e88731d84d97285c362477e179747": {
"Name": "node1",
"EndpointID": "acb6b5441391b70b943bf1f5e69f224ebe7346dee56f02842918f3ea558fa321",
"MacAddress": "02:42:ac:14:00:02",
"IPv4Address": "172.20.0.2/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "dm",
"com.docker.compose.version": "1.27.4"
}
}
]
However, my application inside node1 and node2 is still communicating with each other. ( network disconnect simulation failed. ) is there any reason this is so? or how I can trace the issue?
Thanks
question from:https://stackoverflow.com/questions/65644560/i-cant-simulate-a-network-disconnection-from-docker-container
