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Docker/Docs/Nginx配置文件读取变量.md

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+> 本文作者：丁辉
+>
+
+# Nginx配置文件读取变量
+
+## 方法一使用 Envsubst 渲染替换环境变量
+
+1. 编辑 Dockerfile
+
+   ```dockerfile
+   FROM nginx:alpine-slim
+   
+   COPY ./nginx.conf.template /etc/nginx/conf.d/nginx.conf.template
+   
+   ENV PROXY_SERVER=default
+   
+   CMD /bin/sh -c "envsubst '\$PROXY_SERVER \$SERVER_NAME' < /etc/nginx/conf.d/nginx.conf.template > /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'"
+   ```
+
+2. 编辑 nginx.conf.template 文件
+
+   ```bash
+   vi nginx.conf.template
+   ```
+
+   内容如下
+
+   ```nginx
+   server {
+       listen       80;
+       server_name  ${SERVER_NAME};
+   
+       location / {
+           proxy_pass http://${PROXY_SERVER}:3080;
+           proxy_set_header Host $host;
+           proxy_set_header X-Real-IP $remote_addr;
+       }
+   }
+   ```
+
+3. 构建镜像
+
+   ```bash
+   docker build -t <name:tag> .
+   ```
+
+4. 启动容器(指定变量)
+
+   ```bash
+   docker run -itd -e PROXY_SERVER=127.0.0.1 -e SERVER_NAME=localhost <name:tag>
+   ```
+
+## 方法二
+
+**查看此文档**
+
+[Nginx镜像构建](https://gitee.com/offends/Kubernetes/tree/main/Docker/Dockerfile/Nginx)