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---
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icon: edit
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date: 2021-09-16
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category:
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- Docker
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tag:
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- Docker
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- nginx
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headerDepth: 5
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---
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# Docker给nginx添加端口映射
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## 场景：
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>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
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>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
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## 1、查看容器ID
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执行命令
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```shell
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docker inspect nginx # 容器名
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```
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输出
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```json
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[
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{
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"Id": "135254e3429d1e75aa68569137c753b789416256f2ced52b4c5a85ec3849db87", # hash_of_the_container
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"Created": "2020-08-21T09:41:36.597993005Z",
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"Path": "/docker-entrypoint.sh",
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"Args": [
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"nginx",
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"-g",
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"daemon off;"
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],
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"State": {
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...
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```
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## 2、修改之前一定要先停掉容器，否则自动还原
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```shell
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docker stop nginx
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```
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## 3、修改配置文件
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修改hostconfig.json
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```shell
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cd /var/lib/docker/containers/135254e3429d1e75aa68569137c753b789416256f2ced52b4c5a85ec3849db87 # container id
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vim hostconfig.json
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```
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找到端口绑定，原本内容：
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照猫画虎，添加端口
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```json
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"PortBindings": {
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"80/tcp": [
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{
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"HostIp": "",
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"HostPort": "80"
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}
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],
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"8080/tcp": [
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{
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"HostIp": "",
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"HostPort": "8080"
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}
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],
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"8189/tcp": [
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{
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"HostIp": "",
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"HostPort": "8189"
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}
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]
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},
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```
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修改config.v2.json
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同路径下打开config.v2.json，修改:ExposedPorts
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```json
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"ExposedPorts": {
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"80/tcp": {},
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"8080/tcp": {},
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"8189/tcp": {}
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},
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... # 略
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```
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### 注意
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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。
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## 4、保存、退出、重启容器
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```shell
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sudo systemctl restart docker.service # 重启docker服务
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docker start nginx # 容器名 # 启动容器
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```
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