[英]Docker Can't connect to linked container on the same network - all other containers working
[英]Can't connect to other containers inside docker network
我有幾個容器化的項目,我想互相交流成一個名為“ dev_network”的網絡。
我希望能夠啟動兩個容器,並能夠從容器內部ping它們。
例如,我應該能夠從bar ping foo ,但是我不能。
root@75cba11f489c:/# ping bar
ping: bar: Name or service not known
這些項目位於單獨的文件夾中 ,但是我希望它們能夠連接到同一網絡並能夠相互通信。
這是顯示問題的簡單配置
有foo服務和bar服務。
這是foo服務的Dockerfile :
FROM debian:stretch-slim
RUN set -x && apt-get update && apt-get install -y apt-utils
RUN set -x && apt-get install -y iputils-ping
ENTRYPOINT ["/bin/bash"]
bar服務的Dockerfile是相同的:
FROM debian:stretch-slim
RUN set -x && apt-get update && apt-get install -y apt-utils
RUN set -x && apt-get install -y iputils-ping
ENTRYPOINT ["/bin/bash"]
這是foo服務的docker-compose.yml :
version: '3.5'
services:
foo:
image: foo
build:
context: .
dockerfile: Dockerfile
networks:
default:
name: dev_network
driver: bridge
和酒吧服務唯一略有不同的docker-compose.yml :
version: '3.5'
services:
bar:
image: bar
build:
context: .
dockerfile: Dockerfile
networks:
default:
name: dev_network
driver: bridge
啟動foo服務:
docker-compose build; docker-compose run foo
Building foo
Step 1/4 : FROM debian:stretch-slim
---> bd04d03c4529
Step 2/4 : RUN set -x && apt-get update && apt-get install -y apt-utils
---> Using cache
---> e53a746ba26b
Step 3/4 : RUN set -x && apt-get install -y iputils-ping
---> Using cache
---> 63e2377e85d7
Step 4/4 : ENTRYPOINT ["/bin/bash"]
---> Using cache
---> c304ddfa1035
Successfully built c304ddfa1035
Successfully tagged foo:latest
root@680d2ef987d2:/#
啟動酒吧服務看起來是一樣的:
docker-compose build; docker-compose run bar
... same as above mostly
啟動兩項服務后,網絡如下所示:
docker network ls
NETWORK ID NAME DRIVER SCOPE
95c4f247d652 bridge bridge local
13e26f1434ba dev_network bridge local
5fc09d998133 host host local
23acbaf51f4e none null local
檢查dev_network顯示:
碼頭工人網絡檢查dev_network
docker network inspect dev_network
[
{
"Name": "dev_network",
"Id": "13e26f1434ba74c16964d29ceaa73eafd9df09622a1801c9fc9e49d2552273de",
"Created": "2019-01-07T22:08:25.3589996Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.28.0.0/16",
"Gateway": "172.28.0.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"75cba11f489c8ad01ece0c5348d150fa6e64cdb5da31fe791e4f1c17284326c8": {
"Name": "foo_foo_run_7faa90f193d0",
"EndpointID": "f133df00bec7849c700669ef4395c5c45e82f6b6ab462f4f988508ac78d87d4b",
"MacAddress": "02:42:ac:1c:00:02",
"IPv4Address": "172.28.0.2/16",
"IPv6Address": ""
},
"807fbb8527aacc5d5ac7ef35091ae589aa85a18401f99eb558bfbf07fa5826ef": {
"Name": "bar_bar_run_45964b29fb9a",
"EndpointID": "99001203fdb6f3f1e33b95cad53648c2a029dcda269a687f81ba443656d3d3c2",
"MacAddress": "02:42:ac:1c:00:03",
"IPv4Address": "172.28.0.3/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "dev_network",
"com.docker.compose.project": "bar",
"com.docker.compose.version": "1.23.2"
}
}
]
我找到了一種方法來做我想做的事,但似乎無法通過docker-compose.yml配置
我必須以這種方式啟動服務:
docker-compose build; docker-compose run --name foo --rm foo
和
docker-compose build; docker-compose run --name bar --rm bar
然后,我可以在它們之間ping通,網絡看起來像這樣:
碼頭工人網絡檢查dev_network
...
"Containers": {
"94ae3d8789c2bbf77b1fd2b19a11a00c4fb32462cd20e47b36f0d8c910901c54": {
"Name": "foo",
"EndpointID": "c024a3ff8bf8d98454b05c45e95267508589868a20269552c8bae393d8bd5392",
"MacAddress": "02:42:ac:1c:00:02",
"IPv4Address": "172.28.0.2/16",
"IPv6Address": ""
},
"d310999e759d000b9330177cf4ca483eafd66bcced333b12fe4ff5d0cebdefbc": {
"Name": "bar",
"EndpointID": "6cf92bd9f463a0c1d3e2fd749a8d9e8ae3f13219e1f29a01061a05e040cd485c",
"MacAddress": "02:42:ac:1c:00:03",
"IPv4Address": "172.28.0.3/16",
"IPv6Address": ""
}
},
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