docker原生網(wǎng)絡(luò)分類：
- none
root@jyq-virtual-machine:/home/jyq# docker run -it --network=none busybox
/ #
/ #
/ # ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/ #
容器運(yùn)行后沒(méi)有網(wǎng)絡(luò)，此種網(wǎng)絡(luò)類型可以用來(lái)做主句的隔離
- host
host網(wǎng)絡(luò)配置信息
root@jyq-virtual-machine:/home/jyq# ifconfig
docker0 Link encap:以太網(wǎng) 硬件地址 02:42:16:58:29:48
inet 地址:172.17.0.1 廣播:172.17.255.255 掩碼:255.255.0.0
inet6 地址: fe80::42:16ff:fe58:2948/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:39 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:92 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:0
接收字節(jié):2241 (2.2 KB) 發(fā)送字節(jié):11494 (11.4 KB)
eth0 Link encap:以太網(wǎng) 硬件地址 00:0c:29:78:d3:1e
inet 地址:192.168.100.128 廣播:192.168.100.255 掩碼:255.255.255.0
inet6 地址: fe80::20c:29ff:fe78:d31e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:481994 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:320822 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:1000
接收字節(jié):609233688 (609.2 MB) 發(fā)送字節(jié):39065355 (39.0 MB)
lo Link encap:本地環(huán)回
inet 地址:127.0.0.1 掩碼:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:560 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:560 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:1
接收字節(jié):55305 (55.3 KB) 發(fā)送字節(jié):55305 (55.3 KB)
veth24e3ef4 Link encap:以太網(wǎng) 硬件地址 c6:f2:38:9b:e0:25
inet6 地址: fe80::c4f2:38ff:fe9b:e025/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:0 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:34 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:0
接收字節(jié):0 (0.0 B) 發(fā)送字節(jié):5106 (5.1 KB)
vethbf1d8c4 Link encap:以太網(wǎng) 硬件地址 56:94:85:f5:94:a9
inet6 地址: fe80::5494:85ff:fef5:94a9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:0 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:79 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:0
接收字節(jié):0 (0.0 B) 發(fā)送字節(jié):11862 (11.8 KB)
vethf8de0a7 Link encap:以太網(wǎng) 硬件地址 f2:51:e6:b4:ca:ce
inet6 地址: fe80::f051:e6ff:feb4:cace/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 躍點(diǎn)數(shù):1
接收數(shù)據(jù)包:39 錯(cuò)誤:0 丟棄:0 過(guò)載:0 幀數(shù):0
發(fā)送數(shù)據(jù)包:85 錯(cuò)誤:0 丟棄:0 過(guò)載:0 載波:0
碰撞:0 發(fā)送隊(duì)列長(zhǎng)度:0
接收字節(jié):2787 (2.7 KB) 發(fā)送字節(jié):10207 (10.2 KB)
容器網(wǎng)絡(luò)配置信息：
root@jyq-virtual-machine:/home/jyq# docker run -it --network=host busybox
/ # ifconfig
docker0 Link encap:Ethernet HWaddr 02:42:16:58:29:48
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:16ff:fe58:2948/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39 errors:0 dropped:0 overruns:0 frame:0
TX packets:92 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2241 (2.1 KiB) TX bytes:11494 (11.2 KiB)
eth0 Link encap:Ethernet HWaddr 00:0C:29:78:D3:1E
inet addr:192.168.100.128 Bcast:192.168.100.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe78:d31e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:482055 errors:0 dropped:0 overruns:0 frame:0
TX packets:320871 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:609238920 (581.0 MiB) TX bytes:39074119 (37.2 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:560 errors:0 dropped:0 overruns:0 frame:0
TX packets:560 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:55305 (54.0 KiB) TX bytes:55305 (54.0 KiB)
veth24e3ef4 Link encap:Ethernet HWaddr C6:F2:38:9B:E0:25
inet6 addr: fe80::c4f2:38ff:fe9b:e025/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:5106 (4.9 KiB)
vethbf1d8c4 Link encap:Ethernet HWaddr 56:94:85:F5:94:A9
inet6 addr: fe80::5494:85ff:fef5:94a9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:11862 (11.5 KiB)
vethf8de0a7 Link encap:Ethernet HWaddr F2:51:E6:B4:CA:CE
inet6 addr: fe80::f051:e6ff:feb4:cace/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39 errors:0 dropped:0 overruns:0 frame:0
TX packets:85 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2787 (2.7 KiB) TX bytes:10207 (9.9 KiB)
容器運(yùn)行后使用host的網(wǎng)絡(luò)配置，與host共享網(wǎng)絡(luò)空間，可以看到和host的網(wǎng)絡(luò)配置一致
- bridge
用戶可創(chuàng)建自己的網(wǎng)絡(luò)，使用bridge驅(qū)動(dòng)
# 創(chuàng)建網(wǎng)絡(luò)名稱為my_netde 網(wǎng)絡(luò)
[root@localhost ~]# docker network create --driver bridge --subnet 172.18.10.0/24 --gateway 172.18.10.1 my_net
bea2cc942d2af7037a51ea6e73610bc2e60c573374e59c97aee082e288cc6c3f
# 查看創(chuàng)建成功的網(wǎng)絡(luò)
[root@localhost ~]# docker network ls
NETWORK ID NAME DRIVER SCOPE
bea2cc942d2a my_net bridge local
# 查看網(wǎng)絡(luò)的具體配置信息
[root@localhost ~]# docker network inspect my_net
[
{
"Name": "my_net",
"Id": "bea2cc942d2af7037a51ea6e73610bc2e60c573374e59c97aee082e288cc6c3f",
"Created": "2019-03-06T13:33:52.02555834+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.10.0/24",
"Gateway": "172.18.10.1"
}
]
},
"Internal": false,
"Attachable": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]
網(wǎng)絡(luò)基本操作
查看網(wǎng)絡(luò)
docker network ls
docker network inspect 網(wǎng)絡(luò)名稱
創(chuàng)建網(wǎng)絡(luò)
docker network create --driver bridge --subnet 192.168.1.0/24 --gateway 192.168.100.1
運(yùn)行容器連接到網(wǎng)絡(luò)
docker run -it -d --network=網(wǎng)絡(luò)名稱 --name 容器名稱 鏡像名稱
# 啟動(dòng)一個(gè)web01的容器將網(wǎng)絡(luò)配置為自己新建的網(wǎng)絡(luò)my_net上
[root@localhost ~]# docker run -d -it --network my_net -p 8080:80 --name web01 httpd
fe1a52a9a91c2f74407a72eaded72f4d78e95389eca4215692a037a73fd16d50
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
fe1a52a9a91c httpd "httpd-foreground" 6 seconds ago Up 4 seconds 0.0.0.0:8080->80/tcp web01
[root@localhost ~]# docker network inspect my_net
[
{
"Name": "my_net",
"Id": "bea2cc942d2af7037a51ea6e73610bc2e60c573374e59c97aee082e288cc6c3f",
"Created": "2019-03-06T13:33:52.02555834+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.10.0/24",
"Gateway": "172.18.10.1" #網(wǎng)關(guān)地址
}
]
},
"Internal": false,
"Attachable": false,
"Containers": {
"fe1a52a9a91c2f74407a72eaded72f4d78e95389eca4215692a037a73fd16d50": {
"Name": "web01",
"EndpointID": "9d770e90b4b9f2c09c4ad838320516fb08e8f715b35e05b0ef45b00a2535958b",
"MacAddress": "02:42:ac:12:0a:02",
"IPv4Address": "172.18.10.2/24", ##docker 為web01分配的ip地址
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
為容器分配靜態(tài)ip地址
docker run -it -d --network=網(wǎng)絡(luò)名稱 --ip ip地址 --name 容器名稱 鏡像名稱
只有手動(dòng)指定subnet的網(wǎng)絡(luò)才可以分配靜態(tài)地址
[root@localhost ~]# docker run -d -it --network my_net --ip 172.18.10.5 -p 8088:80 --name web02 httpd
15000eb612ece2620aa57a15f8e67c433a5bc2e8e2a46f037195ced90213917c
[root@localhost ~]# docker network inspect my_net
[
{
"Name": "my_net",
"Id": "bea2cc942d2af7037a51ea6e73610bc2e60c573374e59c97aee082e288cc6c3f",
"Created": "2019-03-06T13:33:52.02555834+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.10.0/24",
"Gateway": "172.18.10.1"
}
]
},
"Internal": false,
"Attachable": false,
"Containers": {
"15000eb612ece2620aa57a15f8e67c433a5bc2e8e2a46f037195ced90213917c": {
"Name": "web02",
"EndpointID": "c9fea1d8fe8d7883b90a3ca47ba721bf76fc99af409c193c0f5c3e184736e2ba",
"MacAddress": "02:42:ac:12:0a:05",
"IPv4Address": "172.18.10.5/24",
"IPv6Address": ""
},
"fe1a52a9a91c2f74407a72eaded72f4d78e95389eca4215692a037a73fd16d50": {
"Name": "web01",
"EndpointID": "9d770e90b4b9f2c09c4ad838320516fb08e8f715b35e05b0ef45b00a2535958b",
"MacAddress": "02:42:ac:12:0a:02",
"IPv4Address": "172.18.10.2/24",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
將一個(gè)容器連接到已有網(wǎng)絡(luò)：
docker network connect 網(wǎng)絡(luò)名稱 容器名稱/id
容器間通信：
-
IP通信
創(chuàng)建兩個(gè)鏈接在同一網(wǎng)絡(luò)下的容器測(cè)試網(wǎng)絡(luò)連通性：
[root@localhost ~]# docker run -it --network my_net --name test01 busybox
/ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:12:0A:03
inet addr:172.18.10.3 Bcast:0.0.0.0 Mask:255.255.255.0 ## docker 為其分配的ip地址
inet6 addr: fe80::42:acff:fe12:a03/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:508 (508.0 B) TX bytes:508 (508.0 B)
[root@localhost ~]# docker run -it --network my_net --name test02 busybox
/ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:12:0A:04
inet addr:172.18.10.4 Bcast:0.0.0.0 Mask:255.255.255.0 ## docker 為其分配的ip地址
inet6 addr: fe80::42:acff:fe12:a04/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:508 (508.0 B) TX bytes:508 (508.0 B)
## ping測(cè)試 在.4中可以ping通.3 ,說(shuō)明在同一個(gè)網(wǎng)絡(luò)里容器時(shí)可以互相通信的
/ # ping 172.18.10.3
PING 172.18.10.3 (172.18.10.3): 56 data bytes
64 bytes from 172.18.10.3: seq=0 ttl=64 time=0.392 ms
64 bytes from 172.18.10.3: seq=1 ttl=64 time=0.105 ms
64 bytes from 172.18.10.3: seq=2 ttl=64 time=0.147 ms
^C
--- 172.18.10.3 ping statistics ---
創(chuàng)建鏈接在不同網(wǎng)絡(luò)下的容器測(cè)試網(wǎng)絡(luò)連通性
root@localhost ~]# docker run -it --name test03 busybox
/ #
/ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:02
inet addr:172.17.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe11:2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2196 (2.1 KiB) TX bytes:578 (578.0 B)
/ # ping 172.18.10.4
PING 172.18.10.4 (172.18.10.4): 56 data bytes
^C
--- 172.18.10.4 ping statistics ---
14 packets transmitted, 0 packets received, 100% packet loss 不能相互通信
##查看路由表，查看主機(jī)ip forwording是否打開(kāi)
[root@localhost ~]# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1======路由轉(zhuǎn)發(fā)已經(jīng)打開(kāi)
[root@localhost ~]# ip route
default via 192.168.136.2 dev ens33 proto static metric 100
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 ===================host已經(jīng)存在路由
172.18.10.0/24 dev br-bea2cc942d2a proto kernel scope link src 172.18.10.1 ==========host已經(jīng)存在路由
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
192.168.136.0/24 dev ens33 proto kernel scope link src 192.168.136.132 metric 100
疑問(wèn)！！host路由轉(zhuǎn)發(fā)已經(jīng)打開(kāi)并且已經(jīng)存在兩個(gè)網(wǎng)絡(luò)的路由，為什么還是不同網(wǎng)絡(luò)的容器不能互相訪問(wèn)，請(qǐng)看iptables表項(xiàng)：
可以看到兩個(gè)網(wǎng)橋雙向流量都被丟棄。
[root@localhost ~]# iptables-save
-A DOCKER-ISOLATION -i docker0 -o br-bea2cc942d2a -j DROP
-A DOCKER-ISOLATION -i br-bea2cc942d2a -o docker0 -j DROP
直接使用docker network connect 命令為需要通信的容器分配相同網(wǎng)絡(luò)的網(wǎng)卡
# 將test03連接到自己新建的網(wǎng)絡(luò)my_net
[root@localhost ~]# docker network connect my_net test03
/ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:11:00:02
inet addr:172.17.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:acff:fe11:2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23 errors:0 dropped:0 overruns:0 frame:0
TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2448 (2.3 KiB) TX bytes:2062 (2.0 KiB)
eth1 Link encap:Ethernet HWaddr 02:42:AC:12:0A:06
inet addr:172.18.10.6 Bcast:0.0.0.0 Mask:255.255.255.0 #新增一快網(wǎng)卡，網(wǎng)卡地址為my_net 地址段
inet6 addr: fe80::42:acff:fe12:a06/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:508 (508.0 B) TX bytes:508 (508.0 B)
# ping測(cè)試
/ # ping 172.18.10.3 可以和test2 的地址通信
PING 172.18.10.3 (172.18.10.3): 56 data bytes
64 bytes from 172.18.10.3: seq=0 ttl=64 time=0.451 ms
64 bytes from 172.18.10.3: seq=1 ttl=64 time=0.138 ms
- docker dns server
當(dāng)網(wǎng)絡(luò)是用戶自建網(wǎng)絡(luò)時(shí)，在容器運(yùn)行時(shí)通過(guò)--name 容器名 指定容器名稱后，以后可以使用容器名稱通信
/ # ping test01
PING test01 (172.18.10.3): 56 data bytes
64 bytes from 172.18.10.3: seq=0 ttl=64 time=0.270 ms
64 bytes from 172.18.10.3: seq=1 ttl=64 time=0.120 ms
- joined容器
在容器運(yùn)行時(shí)，使用--network=container:容器名稱 直接將容器連接到指定容器的網(wǎng)絡(luò)與指定容器共享地址
創(chuàng)建容器test04連接到test02
[root@localhost ~]# docker run -it --network=container:test02 busybox
/ # ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:AC:12:0A:04
inet addr:172.18.10.4 Bcast:0.0.0.0 Mask:255.255.255.0 ## 和test02的ip地址和mac地址都一樣，說(shuō)明網(wǎng)絡(luò)共用
inet6 addr: fe80::42:acff:fe12:a04/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23 errors:0 dropped:0 overruns:0 frame:0
TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1758 (1.7 KiB) TX bytes:1026 (1.0 KiB)
容器與外部網(wǎng)絡(luò)通信
- 容器訪問(wèn)外部世界
默認(rèn)情況下容器能訪問(wèn)外部網(wǎng)絡(luò)，通過(guò)使用源地址轉(zhuǎn)換
[root@localhost ~]# iptables -t nat -S
-A POSTROUTING -s 172.18.10.0/24 ! -o br-bea2cc942d2a -j MASQUERADE
-A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
## 可以看到發(fā)送到非自身網(wǎng)絡(luò)的流量都走M(jìn)ASQUERADE，也就是源地址轉(zhuǎn)換
- 外部世界訪問(wèn)容器
在運(yùn)行容器時(shí)通過(guò)指定-p 外部端口:容器端口，將容器服務(wù)端口映射出去，從而實(shí)現(xiàn)外部世界能夠訪問(wèn)容器
可以使用iptables -t nat -S 查看所在容器網(wǎng)絡(luò)的nat轉(zhuǎn)換表
以下為web01 和web02 配置地址轉(zhuǎn)換后的地址轉(zhuǎn)化表
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
15000eb612ec httpd "httpd-foreground" 3 hours ago Up 3 hours 0.0.0.0:8088->80/tcp web02
fe1a52a9a91c httpd "httpd-foreground" 3 hours ago Up 3 hours 0.0.0.0:8080->80/tcp web01
[root@localhost ~]# iptables -t nat -S
-A DOCKER ! -i br-bea2cc942d2a -p tcp -m tcp --dport 8080 -j DNAT --to-destination 172.18.10.2:80
-A DOCKER ! -i br-bea2cc942d2a -p tcp -m tcp --dport 8088 -j DNAT --to-destination 172.18.10.5:80
# 訪問(wèn)轉(zhuǎn)換后的虛擬地址就能訪問(wèn)到容器內(nèi)部地址如下：
[root@localhost ~]# curl 127.0.0.1:8088
<html><body><h1>It works!</h1></body></html>
[root@localhost ~]# curl 127.0.0.1:8088
<html><body><h1>It works!</h1></body></html>
[root@localhost ~]# curl 127.0.0.1:8080
<html><body><h1>It works!</h1></body></html>
。。。。待續(xù)！！！
