Docker - 解決創建 nginx 容器嘗試掛載 nginx.conf 文件時報錯： mounting "/root/nginx.conf" to rootfs at "/etc/nginx/nginx.conf" caused: mount through procfd: not a directory:

背景

在自己的服務器上想通過 nginx 鏡像創建容器，並掛載鏡像自帶的 nginx.conf 文件

docker run -it -d -v ~/nginx.conf:/etc/nginx/nginx.conf nginx

 

但是報錯了

[root@poloyy ~]# docker run -it -d -v ~/nginx.conf:/etc/nginx/nginx.conf nginx
e0e4b40446a64927603b85854c3a6472b2dfa5681fcbfa0e170c16b15e5c8fdd
docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: process_linux.go:545: container init caused: rootfs_linux.go:76: mounting "/root/nginx.conf" to rootfs at "/etc/nginx/nginx.conf" caused: mount through procfd: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type.
[root@poloyy ~]# client_loop: send disconnect: Broken pipe

 

提取關鍵錯誤信息

 mounting "/root/nginx.conf" to rootfs at "/etc/nginx/nginx.conf" caused: mount through procfd: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)?

將“/root/nginx.conf”掛載到“/etc/nginx/nginx.conf”的rootfs導致：通過procfd掛載：不是目錄：未知：您是否試圖將目錄掛載到文件上（反之亦然） 

 

根因

• 不支持直接掛載文件，只能掛載文件夾
• 想要掛載文件，必須宿主機也要有對應的同名文件

 

解決方法

• 可以先不掛載 nginx.conf
• 先從容器中復制 nginx.conf 出來
• 然后可以自行修改 nginx.conf，自定義配置項
• 創建正式使用的 nginx 容器

 

從 test 容器中復制 nginx.conf 出來

當然也可以去網上隨便找個 nginx.conf，最重要的是宿主機要有個 nginx.conf

docker run --name test -d nginx  
docker cp test:/etc/nginx/nginx.conf /data/

 

創建正式的 nginx 容器，掛載 nginx.conf 文件

可以賦予權限

docker run --privileged -it -p 80:80 \
-v /data/nginx/conf/nginx.conf:/etc/nginx/nginx.conf:ro \
-v /data/nginx/conf/conf.d:/etc/nginx/conf.d:ro \
-v /data/nginx/html:/usr/share/nginx/html:rw \
-v /data/nginx/logs:/var/log/nginx -d nginx