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---
icon: edit
date: 2021-09-16
category:
- Docker
tag:
- Docker
- nginx
headerDepth: 5
---
# Docker给nginx添加端口映射
## 场景:
>运行了nginx一开始只映射了80端口后面载部署项目的时候需要用到其他端口不想重新部署容器所以通过修改配置文件的方式给容器添加其他端口
>当然。添加端口的方法是通用的,除此以外的方法比如将容器打包成镜像,再运行一个容器,或者干脆放弃当前容器,重新运行一个容器是完全不在我考虑范围内的
## 1、查看容器ID
执行命令
```shell
docker inspect nginx # 容器名
```
输出
```json
[
{
"Id": "135254e3429d1e75aa68569137c753b789416256f2ced52b4c5a85ec3849db87", # hash_of_the_container
"Created": "2020-08-21T09:41:36.597993005Z",
"Path": "/docker-entrypoint.sh",
"Args": [
"nginx",
"-g",
"daemon off;"
],
"State": {
...
```
## 2、修改之前一定要先停掉容器否则自动还原
```shell
docker stop nginx
```
## 3、修改配置文件
修改hostconfig.json
```shell
cd /var/lib/docker/containers/135254e3429d1e75aa68569137c753b789416256f2ced52b4c5a85ec3849db87 # container id
vim hostconfig.json
```
找到端口绑定,原本内容:
![image.png](/upload/2021/09/image-b18afbfb43414f6da5550bae5f7566c0.png)
照猫画虎,添加端口
```json
"PortBindings": {
"80/tcp": [
{
"HostIp": "",
"HostPort": "80"
}
],
"8080/tcp": [
{
"HostIp": "",
"HostPort": "8080"
}
],
"8189/tcp": [
{
"HostIp": "",
"HostPort": "8189"
}
]
},
```
修改config.v2.json
同路径下打开config.v2.json修改:ExposedPorts
```json
"ExposedPorts": {
"80/tcp": {},
"8080/tcp": {},
"8189/tcp": {}
},
... #
```
### 注意
很多文章中提到还要修改Ports实际上是不需要的只有在你没有stop容器时Ports才会有值如果关闭了容器就是null。当然如果你修改了也无所谓因为重启容器后就会被刷新。
## 4、保存、退出、重启容器
```shell
sudo systemctl restart docker.service # 重启docker服务
docker start nginx # 容器名 # 启动容器
```