docker httpd (pid 1) already running

分析原因是因爲容器重啓後 httpd.pid 未刪除，導致重啓的時候檢測到 apache 服務在運行
error

httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
httpd (pid 1) already running
root@ubuntu:/var/lib/docker/overlay2#

docker container inspect 7e336d136e827e8b3daffbd80363d0daf4d0a40a54c5dfda85727bfdf1e9f7e5

搜索

root@ubuntu:/var/lib/docker/overlay2# find ./ -name apache2.pid

刪除

root@ubuntu:/var/lib/docker/overlay2# rm -rf ./92cce34fc1ca4585ec25d729949f573a92b39ac0dd7f2fc8cc42b5a17016afb4/diff/run/apache2/apache2.pid

即可啓動容器了

如果使用了容器編排的方式，請參考操作
https://forums.docker.com/t/httpd-already-running/33397