将Go语言编写的HttpServer部署到Docker并推送到DockerHub
Posted 虎鲸不是鱼
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了将Go语言编写的HttpServer部署到Docker并推送到DockerHub相关的知识，希望对你有一定的参考价值。
原始需求
- 构建本地镜像
- 编写 Dockerfile 将httpserver 容器化
- 将镜像推送至 docker 官方镜像仓库
- 通过 docker 命令本地启动 httpserver
- 通过 nsenter 进入容器查看 IP 配置
HttpServer代码
之前已经写过代码：使用Go语言编写Http Server
package main
import (
"fmt"
"os"
"strconv"
//"github.com/thinkeridea/go-extend/exnet"
"io"
"log"
"net/http"
"strings"
)
/*
1，接收客户端 request，并将 request 中带的 header 写入 response header
2，读取当前系统的环境变量中的 VERSION 配置，并写入 response header
3，Server 端记录访问日志包括客户端 IP，HTTP 返回码，输出到 server 端的标准输出
4，当访问 localhost/healthz 时，应返回 200
*/
// Main方法入口
func main()
println("环境正常")
// 功能1
http.HandleFunc("/requestAndResponse", requestAndResponse)
// 功能2
http.HandleFunc("/getVersion", getVersion)
// 功能3
http.HandleFunc("/ipAndStatus", ipAndStatus) //注册接口句柄
// 功能4
http.HandleFunc("/healthz", healthz) //注册接口句柄
err := http.ListenAndServe(":81", nil) //监听空句柄，80端口被占用，使用81端口
if nil != err
log.Fatal(err) //显示错误日志
// 功能1，接收请求及响应
func requestAndResponse(response http.ResponseWriter, request *http.Request)
println("调用requestAndResponse接口")
headers := request.Header //header是Map类型的数据
println("传入的hander：")
for header := range headers //value是[]string
//println("header的key：" + header)
values := headers[header]
for index, _ := range values
values[index] = strings.TrimSpace(values[index])
//println("index=" + strconv.Itoa(index))
//println("header的value：" + values[index])
//valueString := strings.Join(values, "")
//println("header的value：" + valueString)
println(header + "=" + strings.Join(values, ",")) //打印request的header的k=v
response.Header().Set(header, strings.Join(values, ",")) // 遍历写入response的Header
//println()
fmt.Fprintln(response, "Header全部数据:", headers)
io.WriteString(response, "succeed")
// 功能2，获取环境变量的version
func getVersion(response http.ResponseWriter, request *http.Request)
println("调用getVersion接口")
envStr := os.Getenv("VERSION")
//envStr := os.Getenv("HADOOP_HOME")
//println("系统环境变量：" + envStr) //可以看到 C:\\soft\\hadoop-3.3.1 Win10需要重启电脑才能生效
response.Header().Set("VERSION", envStr)
io.WriteString(response, "succeed")
// 功能3，输出IP与返回码
func ipAndStatus(response http.ResponseWriter, request *http.Request)
println("调用ipAndStatus接口")
form := request.RemoteAddr
println("Client->ip:port=" + form) //虚拟机是桥接模式。使用postman返回的全部是127.0.0.1 用手机打开网站192.168.1.139:81/ipAndStatus可以看到新IP
ipStr := strings.Split(form, ":")
println("Client->ip=" + ipStr[0]) //打印ip
// 获取http响应码
//response.WriteHeader(301) //手动设置响应码，默认200
//response.WriteHeader(http.StatusOK)//由于默认是调用这个，∴返回码都是这个200【server.go有源码】
println("Client->response code=" + strconv.Itoa(http.StatusOK))
//println("response code->：" + code)
io.WriteString(response, "succeed")
// 功能4，连通性测试接口
func healthz(response http.ResponseWriter, request *http.Request)
println("调用healthz接口")
response.WriteHeader(200) //设置返回码200
//response.WriteHeader(http.StatusOK)//默认会调用这个方法，默认就是200【server.go有源码】
io.WriteString(response, "succeed")
Ubuntu安装Go
Last login: Tue May 3 20:22:13 2022 from 192.168.88.1
zhiyong@zhiyong-vm-dev:~$ ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.88.50 netmask 255.255.255.0 broadcast 192.168.88.255
inet6 fe80::e89d:a89:8f8f:9304 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:56:16:b5 txqueuelen 1000 (以太网)
RX packets 892 bytes 721182 (721.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 694 bytes 97876 (97.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (本地环回)
RX packets 218 bytes 20407 (20.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 218 bytes 20407 (20.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
zhiyong@zhiyong-vm-dev:~$ go
Command 'go' not found, but can be installed with:
sudo snap install go # version 1.17.6, or
sudo apt install golang-go # version 2:1.16~0ubuntu1
sudo apt install gccgo-go # version 2:1.16~0ubuntu1
See 'snap info go' for additional versions.
zhiyong@zhiyong-vm-dev:~$ sudo apt install golang-go
升级了 0 个软件包，新安装了 33 个软件包，要卸载 0 个软件包，有 0 个软件包未被升级。
需要下载 212 MB 的归档。
解压缩后会消耗 844 MB 的额外空间。
您希望继续执行吗？ [Y/n] y
zhiyong@zhiyong-vm-dev:~$ go version
go version go1.17 linux/amd64
Ubuntu编译Go代码
先检查81端口占用情况：
win中使用：
C:\\Users\\zhiyong>netstat -ano | findstr "81"
C:\\Users\\zhiyong>taskkill -f -pid 这里写PID号
杀进程。Goland做Debug就很方便。
Ubuntu使用：
zhiyong@zhiyong-vm-dev:~$ mkdir -p dockerstudy/httpserver/go
zhiyong@zhiyong-vm-dev:~$ cd /home/zhiyong/dockerstudy/httpserver/go/
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ ll
总用量 8
drwxrwxr-x 2 zhiyong zhiyong 4096 5月 5 00:02 ./
drwxrwxr-x 3 zhiyong zhiyong 4096 5月 5 00:02 ../
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ sudo apt install vim
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ vim main.go
# 将Go代码写进去
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ ll
总用量 12
drwxrwxr-x 2 zhiyong zhiyong 4096 5月 5 00:07 ./
drwxrwxr-x 3 zhiyong zhiyong 4096 5月 5 00:02 ../
-rw-rw-r-- 1 zhiyong zhiyong 3559 5月 5 00:07 main.go
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ netstat -atunlp | grep 81
（并非所有进程都能被检测到，所有非本用户的进程信息将不会显示，如果想看到所有信息，则必须切换到 root 用户）
udp 0 0 0.0.0.0:52981 0.0.0.0:* -
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ sudo go build -o gohttpserver main.go
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ ll
总用量 6000
drwxrwxr-x 2 zhiyong zhiyong 4096 5月 5 00:09 ./
drwxrwxr-x 3 zhiyong zhiyong 4096 5月 5 00:02 ../
-rwxr-xr-x 1 root root 6128735 5月 5 00:09 gohttpserver*
-rw-rw-r-- 1 zhiyong zhiyong 3559 5月 5 00:07 main.go
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ ./gohttpserver
环境正常
2022/05/05 00:09:19 listen tcp :81: bind: permission denied
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ sudo ./gohttpserver
环境正常
另一个黑窗口：
zhiyong@zhiyong-vm-dev:~$ netstat -atunlp | grep 81
（并非所有进程都能被检测到，所有非本用户的进程信息将不会显示，如果想看到所有信息，则必须切换到 root 用户）
tcp6 0 0 :::81 :::* LISTEN -
udp 0 0 0.0.0.0:52981 0.0.0.0:* -
zhiyong@zhiyong-vm-dev:~$ sudo netstat -atunlp | grep 81
[sudo] zhiyong 的密码：
tcp6 0 0 :::81 :::* LISTEN 12367/./gohttpserve
udp 0 0 0.0.0.0:52981 0.0.0.0:* 834/avahi-daemon: r
可以看到进程启动。
浏览器访问：
http://192.168.88.50:81/healthz
显示文字succeed，说明编译成功，且该编译后的可执行程序在Ubuntu可以正常使用。
结束程序：
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver/go$ sudo ./gohttpserver
环境正常
调用healthz接口
^C
zhiyong@zhiyong-vm-dev:~$ sudo netstat -atunlp | grep 81
tcp6 0 0 192.168.88.50:81 192.168.88.1:49547 TIME_WAIT -
udp 0 0 0.0.0.0:52981 0.0.0.0:* 834/avahi-daemon: r
Ubuntu安装Docker
zhiyong@zhiyong-vm-dev:~$ docker
Command 'docker' not found, but can be installed with:
sudo snap install docker # version 20.10.11, or
sudo apt install docker.io # version 20.10.12-0ubuntu2~21.10.1
See 'snap info docker' for additional versions.
zhiyong@zhiyong-vm-dev:~$ sudo apt install docker.io
zhiyong@zhiyong-vm-dev:~$ sudo apt install docker.io
[sudo] zhiyong 的密码：
正在读取软件包列表... 完成
正在分析软件包的依赖关系树... 完成
正在读取状态信息... 完成
下列软件包是自动安装的并且现在不需要了：
libfwupdplugin1 linux-headers-5.13.0-30 linux-headers-5.13.0-30-generic linux-image-5.13.0-30-generic linux-modules-5.13.0-30-generic
linux-modules-extra-5.13.0-30-generic
使用'sudo apt autoremove'来卸载它(它们)。
将会同时安装下列软件：
bridge-utils containerd git git-man liberror-perl pigz runc ubuntu-fan
建议安装：
ifupdown aufs-tools btrfs-progs cgroupfs-mount | cgroup-lite debootstrap docker-doc rinse zfs-fuse | zfsutils git-daemon-run | git-daemon-sysvinit git-doc
git-email git-gui gitk gitweb git-cvs git-mediawiki git-svn
下列【新】软件包将被安装：
bridge-utils containerd docker.io git git-man liberror-perl pigz runc ubuntu-fan
升级了 0 个软件包，新安装了 9 个软件包，要卸载 0 个软件包，有 0 个软件包未被升级。
需要下载 70.1 MB 的归档。
解压缩后会消耗 315 MB 的额外空间。
您希望继续执行吗？ [Y/n] y
注册Docker Hub
https://hub.docker.com/
构建镜像
拉取Ubuntu镜像：
zhiyong@zhiyong-vm-dev:~$ docker pull ubuntu
Using default tag: latest
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/create?fromImage=ubuntu&tag=latest": dial unix /var/run/docker.sock: connect: permission denied
zhiyong@zhiyong-vm-dev:~$ sudo docker pull ubuntu
[sudo] zhiyong 的密码：
Using default tag: latest
latest: Pulling from library/ubuntu
125a6e411906: Pull complete
Digest: sha256:26c68657ccce2cb0a31b330cb0be2b5e108d467f641c62e13ab40cbec258c68d
Status: Downloaded newer image for ubuntu:latest
docker.io/library/ubuntu:latest
zhiyong@zhiyong-vm-dev:~$ docker images
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/images/json": dial unix /var/run/docker.sock: connect: permission denied
zhiyong@zhiyong-vm-dev:~$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
启动Ubuntu镜像：
zhiyong@zhiyong-vm-dev:~$ sudo docker run -ti ubuntu /bin/bash
root@c515a662d46c:/# pwd
/
root@c515a662d46c:/# vim test.txt
bash: vim: command not found #需要安装vim
root@c515a662d46c:/# apt-get update
root@c515a662d46c:/# apt-get -y install vim
root@c515a662d46c:/# exit
exit
zhiyong@zhiyong-vm-dev:~$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c515a662d46c ubuntu "/bin/bash" 11 minutes ago Exited (0) 39 seconds ago goofy_heisenberg
zhiyong@zhiyong-vm-dev:~$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~$ sudo docker commit -m="add vim" -a="zhiyong" c515a662d46c ubuntuwithvm
sha256:428e030662bc465ce126cf3a9e726b1be34219583c1200865ad11e89a16b961a
zhiyong@zhiyong-vm-dev:~$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntuwithvm latest 428e030662bc 14 seconds ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
DockerFile内容：
FROM ubuntu
RUN echo '这是一个基于ubuntu且应用为httpserver的镜像' && mkdir -p /dockerstudy/httpserver
COPY go/gohttpserver /dockerstudy/httpserver/
#此处source路径必须是相对路径，使用绝对路径会报错COPY failed: file not found in build context or excluded by .dockerignore: stat /home/zhiyong/dockerstudy/httpserver/go/gohttpserver: file does not exist
ENTRYPOINT ["/dockerstudy/httpserver/gohttpserver"]
构建命令：
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ pwd
/home/zhiyong/dockerstudy/httpserver
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ vim Dockerfile
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker build -t gohttpserver:v1 .
Sending build context to Docker daemon 6.136MB
Step 1/4 : FROM ubuntu
---> d2e4e1f51132
Step 2/4 : RUN echo '这是一个基于ubuntu且应用为httpserver的镜像' && mkdir -p /dockerstudy/httpserver
---> Using cache
---> 78301d6519e6
Step 3/4 : COPY go/gohttpserver /dockerstudy/httpserver
---> a71b9bf69a19
Step 4/4 : ENTRYPOINT ["/dockerstudy/httpserver/gohttpserver"]
---> Running in f5ac6f75f356
Removing intermediate container f5ac6f75f356
---> ffdef51c9a42
Successfully built ffdef51c9a42
Successfully tagged gohttpserver:v1
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gohttpserver v1 ffdef51c9a42 2 minutes ago 83.9MB
ubuntuwithvm latest 428e030662bc 56 minutes ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker run -p 82:81 gohttpserver:v1
环境正常
浏览器：
http://192.168.88.50:82/healthz
可以看到succeed。并且Linux黑窗口会显示：
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker run -p 82:81 gohttpserver:v1
环境正常
调用healthz接口
说明容器构建成功。
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
93d3eac39a12 gohttpserver:v1 "/dockerstudy/httpse…" 4 minutes ago Exited (2) 27 seconds ago awesome_johnson
c515a662d46c ubuntu "/bin/bash" About an hour ago Exited (0) About an hour ago goofy_heisenberg
ctrl+C退出即可。确保容器已经关闭。
推送至hub.docker.com
先创建新的仓库：zhiyongdocker/dockerstudy
官方给出了推送的命令：
docker tag local-image:tagname new-repo:tagname
docker push new-repo:tagname
先登录：
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: zhiyongdocker
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
修改镜像名称并推送：
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gohttpserver v1 ffdef51c9a42 29 minutes ago 83.9MB
ubuntuwithvm latest 428e030662bc About an hour ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker tag gohttpserver:v1 zhiyongdocker/dockerstudy/httpserver:v1
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gohttpserver v1 ffdef51c9a42 30 minutes ago 83.9MB
zhiyongdocker/dockerstudy/httpserver v1 ffdef51c9a42 30 minutes ago 83.9MB
ubuntuwithvm latest 428e030662bc About an hour ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker push zhiyongdocker/dockerstudy/httpserver:v1
#名称不对会失败
The push refers to repository [docker.io/zhiyongdocker/dockerstudy/httpserver]
b45d2bb1a7ec: Preparing
8a1c3d1d2aba: Preparing
e59fc9495612: Preparing
denied: requested access to the resource is denied
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gohttpserver v1 ffdef51c9a42 34 minutes ago 83.9MB
zhiyongdocker/dockerstudy/httpserver v1 ffdef51c9a42 34 minutes ago 83.9MB
ubuntuwithvm latest 428e030662bc About an hour ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker tag gohttpserver:v1 zhiyongdocker/dockerstudy:v1
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gohttpserver v1 ffdef51c9a42 34 minutes ago 83.9MB
zhiyongdocker/dockerstudy/httpserver v1 ffdef51c9a42 34 minutes ago 83.9MB
zhiyongdocker/dockerstudy v1 ffdef51c9a42 34 minutes ago 83.9MB
ubuntuwithvm latest 428e030662bc About an hour ago 170MB
ubuntu latest d2e4e1f51132 4 days ago 77.8MB
zhiyong@zhiyong-vm-dev:~/dockerstudy/httpserver$ sudo docker push zhiyongdocker/dockerstudy:v1
The push refers to repository [docker.io/zhiyongdocker/dockerstudy]
b45d2bb1a7ec: Pushed
8a1c3d1d2aba: Pushed
e59fc9495612: Pushed
v1: digest: sha256:94edccac916aeccf113bfdcbd7ce2e35b774839790bdecdab417d5c049021068 size: 947
本地启动http server容器
zhiyong@zhiyong-vm-dev:~$ sudo docker run -p 83:81 zhiyongdocker/dockerstudy:v1
环境正常
调用healthz接口
^Czhiyong@zhiyong-vm-dev:~$ sudo dockeps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8377df17b1e1 zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 20 seconds ago Exited (2) 5 seconds ago zen_ritchie
8e97bbad0d3b zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" About a minute ago Exited (2) About a minute ago blissful_black
93d3eac39a12 gohttpserver:v1 "/dockerstudy/httpse…" 35 minutes ago Exited (2) 31 minutes ago awesome_johnson
c515a662d46c ubuntu "/bin/bash" 2 hours ago Exited (0) 2 hours ago goofy_heisenberg
和之前的状态相同。浏览器：
http://192.168.88.50:83/healthz
可以看到succeed，说明容器正常。
进入容器查看 IP 配置
重启容器：
zhiyong@zhiyong-vm-dev:~$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8377df17b1e1 zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 10 minutes ago Up 37 seconds 0.0.0.0:83->81/tcp, :::83->81/tcp zen_ritchie
8e97bbad0d3b zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 11 minutes ago Exited (2) 11 minutes ago blissful_black
93d3eac39a12 gohttpserver:v1 "/dockerstudy/httpse…" 45 minutes ago Exited (2) 41 minutes ago awesome_johnson
c515a662d46c ubuntu "/bin/bash" 2 hours ago Exited (0) 2 hours ago goofy_heisenberg
zhiyong@zhiyong-vm-dev:~$ sudo docker stop 8377df17b1e1
8377df17b1e1
zhiyong@zhiyong-vm-dev:~$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8377df17b1e1 zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 10 minutes ago Exited (2) 20 seconds ago zen_ritchie
8e97bbad0d3b zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 12 minutes ago Exited (2) 11 minutes ago blissful_black
93d3eac39a12 gohttpserver:v1 "/dockerstudy/httpse…" 46 minutes ago Exited (2) 41 minutes ago awesome_johnson
c515a662d46c ubuntu "/bin/bash" 2 hours ago Exited (0) 2 hours ago goofy_heisenberg
zhiyong@zhiyong-vm-dev:~$ sudo docker restart 8377df17b1e1
8377df17b1e1
zhiyong@zhiyong-vm-dev:~$ sudo docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8377df17b1e1 zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 10 minutes ago Up 5 seconds 0.0.0.0:83->81/tcp, :::83->81/tcp zen_ritchie
8e97bbad0d3b zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 12 minutes ago Exited (2) 11 minutes ago blissful_black
93d3eac39a12 gohttpserver:v1 "/dockerstudy/httpse…" 46 minutes ago Exited (2) 41 minutes ago awesome_johnson
c515a662d46c ubuntu "/bin/bash" 2 hours ago Exited (0) 2 hours ago goofy_heisenberg
查看Docker镜像的PID：
zhiyong@zhiyong-vm-dev:~$ sudo docker container top 8377df17b1e1
UID PID PPID C STIME TTY TIME CMD
root 17780 17760 0 01:39 ? 00:00:00 /dockerstudy/httpserver/gohttpserver
zhiyong@zhiyong-vm-dev:~$ sudo docker inspect -f .State.Pid 8377df17b1e1
17780
查看帮助：
zhiyong@zhiyong-vm-dev:~$ nsenter --help
用法：
nsenter [选项] [<程序> [<参数>...]]
以其他程序的名字空间运行某个程序。
选项：
-a, --all enter all namespaces
-t, --target <pid> 要获取名字空间的目标进程
-m, --mount[=<文件>] 进入 mount 名字空间
-u, --uts[=<文件>] 进入 UTS 名字空间(主机名等)
-i, --ipc[=<文件>] 进入 System V IPC 名字空间
-n, --net[=<文件>] 进入网络名字空间
-p, --pid[=<文件>] 进入 pid 名字空间
-C, --cgroup[=<文件>] 进入 cgroup 名字空间
-U, --user[=<文件>] 进入用户名字空间
-T, --time[=<file>] enter time namespace
-S, --setuid <uid> 设置进入空间中的 uid
-G, --setgid <gid> 设置进入名字空间中的 gid
--preserve-credentials 不干涉 uid 或 gid
-r, --root[=<目录>] 设置根目录
-w, --wd[=<dir>] 设置工作目录
-F, --no-fork 执行 <程序> 前不 fork
-Z, --follow-context 根据 --target PID 设置 SELinux 环境
-h, --help display this help
-V, --version display version
更多信息请参阅 nsenter(1)。
根据PID进入Docker容器的网络命名空间：
zhiyong@zhiyong-vm-dev:~$ sudo nsenter -n -t17780
root@zhiyong-vm-dev:/home/zhiyong# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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
18: eth0@if19: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
root@zhiyong-vm-dev:/home/zhiyong# exit
注销
查看网络配置：
zhiyong@zhiyong-vm-dev:~$ su - root
密码：
su: 认证失败
zhiyong@zhiyong-vm-dev:~$ sudo su - root
root@zhiyong-vm-dev:~# cd /run/d
dbus/ docker/
root@zhiyong-vm-dev:~# cd /run/docker/
containerd/ libnetwork/ netns/ plugins/ runtime-runc/ swarm/
root@zhiyong-vm-dev:~# cd /run/docker/netns/
root@zhiyong-vm-dev:/run/docker/netns# ll
总用量 0
drwxr-xr-x 2 root root 60 5月 5 01:39 ./
drwx------ 8 root root 180 5月 4 23:38 ../
-r--r--r-- 1 root root 0 5月 5 01:39 2822acc443f5
root@zhiyong-vm-dev:/run/docker/netns# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8377df17b1e1 zhiyongdocker/dockerstudy:v1 "/dockerstudy/httpse…" 31 minutes ago Up 20 minutes 0.0.0.0:83->81/tcp, :::83->81/tcp zen_ritchie
root@zhiyong-vm-dev:/run/docker/netns# docker inspect 8377df17b1e1 | grep -i sandbox
"SandboxID": "2822acc443f5b4f718b5a4c5d8cdf704868af013b37c257dcc6a69233d29d042",
"SandboxKey": "/var/run/docker/netns/2822acc443f5",
root@zhiyong-vm-dev:/run/docker/netns# nsenter --net=/var/run/docker/netns/2822acc443f5 sh
# iptables -nvL -t mangle
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target 以上是关于将Go语言编写的HttpServer部署到Docker并推送到DockerHub的主要内容，如果未能解决你的问题，请参考以下文章