我无法lonelyisland从位于同一网络的另一个容器连接到网络中的一个容器。
docker run --rm --name spaceship --net lonelyisland --expose 8080 -p 8080:8080 --ip 172.18.0.8 quay.io/ahoi/spaceship:latest target/release/spaceship
据我理解-p，没有必要，--expose与给出的Dockerfile。
该应用程序即使没有docker也能正常运行，所以它一定与docker（网络）相关。
基于 curl 的测试程序如下：
docker run --rm -it --name "curl-test" --net lonelyisland fedora:latest /bin/bash
设置test-curl
[root@52ac28b36b93 /]# dnf install iproute iputils
Fedora 24 - x86_64 54 MB/s | 47 MB 00:00
Fedora 24 - x86_64 - Updates 54 MB/s | 21 MB 00:00
Last metadata expiration check: 0:00:12 ago on Fri Feb 24 06:19:26 2017.
Dependencies resolved.
==============================================================================================
Package Arch Version Repository Size
==============================================================================================
Installing:
iproute x86_64 4.4.0-3.fc24 fedora 658 k
iputils x86_64 20160308-3.fc24 updates 157 k
linux-atm-libs x86_64 2.5.1-14.fc24 fedora 40 k
Transaction Summary
==============================================================================================
Install 3 Packages
Total download size: 854 k
Installed size: 1.9 M
Is this ok [y/N]: y
Downloading Packages:
(1/3): linux-atm-libs-2.5.1-14.fc24.x86_64.rpm 4.1 MB/s | 40 kB 00:00
(2/3): iputils-20160308-3.fc24.x86_64.rpm 12 MB/s | 157 kB 00:00
(3/3): iproute-4.4.0-3.fc24.x86_64.rpm 22 MB/s | 658 kB 00:00
----------------------------------------------------------------------------------------------
Total 752 kB/s | 854 kB 00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Installing : linux-atm-libs-2.5.1-14.fc24.x86_64 1/3
Installing : iproute-4.4.0-3.fc24.x86_64 2/3
Installing : iputils-20160308-3.fc24.x86_64 3/3
Failed to connect to bus: No such file or directory
Verifying : iproute-4.4.0-3.fc24.x86_64 1/3
Verifying : linux-atm-libs-2.5.1-14.fc24.x86_64 2/3
Verifying : iputils-20160308-3.fc24.x86_64 3/3
Installed:
iproute.x86_64 4.4.0-3.fc24 iputils.x86_64 20160308-3.fc24
linux-atm-libs.x86_64 2.5.1-14.fc24
Complete!
验证我们拥有正确的 IP 子网：
[root@52ac28b36b93 /]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
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
35: eth0@if36: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:ac:12:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 172.18.0.3/16 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::42:acff:fe12:3/64 scope link
valid_lft forever preferred_lft forever
第一次尝试时我忘记启动容器
[root@52ac28b36b93 /]# curl -v 172.18.0.8:8080/
* Trying 172.18.0.8...
* connect to 172.18.0.8 port 8080 failed: No route to host
* Failed to connect to 172.18.0.8 port 8080: No route to host
* Closing connection 0
curl: (7) Failed to connect to 172.18.0.8 port 8080: No route to host
这里我想要连接的容器已经启动并正在运行，我面临的实际问题
[root@52ac28b36b93 /]# curl -v 172.18.0.8:8080/
* Trying 172.18.0.8...
* connect to 172.18.0.8 port 8080 failed: Connection refused
* Failed to connect to 172.18.0.8 port 8080: Connection refused
* Closing connection 0
curl: (7) Failed to connect to 172.18.0.8 port 8080: Connection refused
[root@52ac28b36b93 /]#
网络如下所示：
docker network inspect lonelyisland
[
{
"Name": "lonelyisland",
"Id": "2bab66f7ba770cc4866afe1322ebf82985b078c614404333119bb54c5535b444",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.0.0/16",
"Gateway": "172.18.0.1"
}
]
},
"Internal": false,
"Containers": {
"1c2522ee9f06ec1d20a827ac0d8f2037081d0b7d25008057d016d0d1ba31b24c": {
"Name": "spaceship",
"EndpointID": "d18eaf2141c60e683e73967674c8d4f701793d9143480c5ad40c151be4464024",
"MacAddress": "02:42:ac:12:00:08",
"IPv4Address": "172.18.0.8/16",
"IPv6Address": ""
},
"82cc532808d815236b638448a0c4b00c1dae44570d36837e314d5d6b05a7ff22": {
"Name": "curl-test",
"EndpointID": "cfd4a8e203980a6a848938a021d04631ade8d3724dc0af5f9027096bf894e0fb",
"MacAddress": "02:42:ac:12:00:03",
"IPv4Address": "172.18.0.3/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true"
},
"Labels": {}
}
]
docker 创建 iptables
sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
DOCKER-ISOLATION all -- anywhere anywhere
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain DOCKER (2 references)
target prot opt source destination
ACCEPT tcp -- anywhere 172.18.0.8 tcp dpt:http-alt
Chain DOCKER-ISOLATION (1 references)
target prot opt source destination
DROP all -- anywhere anywhere
DROP all -- anywhere anywhere
RETURN all -- anywhere anywhere
有什么提示/想法吗？
答案1
于是我开始逐层深入研究，最后找到了基础镜像，即fedora:24
我使用 bash shell 进入容器，启动应用程序并从那里运行 curl。它也没有工作。由于某种奇怪的原因，应用程序无法在该容器中工作，我尝试了不同的基础镜像（git 中的当前版本）。它工作得很好。所以上面的东西都很好。