099、如何访问Service （Swarm06）

参考https://www.cnblogs.com/CloudMan6/p/7909136.html

前面已经学习了如何部署Service吗，也验证了swarm的failover特性，下面我们要学习的是如何访问Service。

下面我们删除之前的Service，重新部署一个Service

内部访问Service

root@host03:~# docker service rm web_server # 删除之前的Service web_server

web_server

root@host03:~# docker service create --name web_server --replicas=2 httpd # 创建新的Service，并设置副本数为2

1hgm1w94dvuxlbsen9lmsefvz

overall progress: 2 out of 2 tasks

1/2: running [==================================================>]

2/2: running [==================================================>]

verify: Service converged

root@host03:~# docker service ps web_server # 查看新建Service 容器分布情况

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

s4o9mtd8xvqe web_server.1 httpd:latest host01 Running Running 12 seconds ago

kq66bz6omujf web_server.2 httpd:latest host02 Running Running 12 seconds ago

root@host01:~# docker inspect web_server.1.s4o9mtd8xvqe8yqcnbyuom26f | jq .[0].NetworkSettings # 查看某容器内部IP地址

{

"Bridge": "",

"SandboxID": "407fde9cdf85507b7e5c635ea3313e41e6ef54da9242837e292526cf0398000d",

"HairpinMode": false,

"LinkLocalIPv6Address": "",

"LinkLocalIPv6PrefixLen": 0,

"Ports": {

"80/tcp": null

"SandboxKey": "/var/run/docker/netns/407fde9cdf85",

"SecondaryIPAddresses": null,

"SecondaryIPv6Addresses": null,

"EndpointID": "a10f1d6f81f492f8b7911997a0837d499f8bbc733c274c955e479c0fedeec433",

"Gateway": "172.17.0.1",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"IPAddress": "172.17.0.2",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"MacAddress": "02:42:ac:11:00:02",

"Networks": {

"bridge": {

"IPAMConfig": null,

"Links": null,

"Aliases": null,

"NetworkID": "d4b0862f06c8f2f16802b3fe9175743e7afdc2396322ff19e656bebca4d9a940",

"EndpointID": "a10f1d6f81f492f8b7911997a0837d499f8bbc733c274c955e479c0fedeec433",

"Gateway": "172.17.0.1",

"IPAddress": "172.17.0.2",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"MacAddress": "02:42:ac:11:00:02",

"DriverOpts": null

}

root@host01:~# curl http://172.17.0.2 # 内部访问验证

<html><body><h1>It works!</h1></body></html>

外部访问Service

root@host03:~# docker service update --publish-add 8080:80 web_server # 更新Service配置，添加端口映射，将容器的80端口映射到host的8080端口

web_server

overall progress: 2 out of 2 tasks

1/2: running [==================================================>]

2/2: running [==================================================>]

verify: Service converged

root@host03:~# curl http://10.12.31.211:8080 # 访问 host01 IP 验证外部访问

<html><body><h1>It works!</h1></body></html>

root@host03:~# curl http://10.12.31.212:8080 # 访问 host02 IP 验证外部访问

<html><body><h1>It works!</h1></body></html>

root@host03:~# curl http://10.12.31.213:8080 # 访问 host03 IP 验证外部访问（host03上没有容器，也可以访问成功，这是swarm的一个特性 routing mesh）

<html><body><h1>It works!</h1></body></html>

巴特西

099、如何访问Service （Swarm06）

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