[root@localhost ~]
# mkdir nginx
[root@localhost ~]
# cd nginx/
[root@localhost nginx]
# touch dockerfile
[root@localhost nginx]
# vim dockerfile
from daocloud.io/library/centos:7
maintainer nginx
run yum install -y epel-release
run yum install -y gcc gcc-c++ pcre pcre-devel openssl openssl-devel zlib zlib-server make
run useradd -s /sbin/nologin -m nginx
add nginx-1.16.0.tar.gz /usr/local/
workdir /usr/local/nginx-1.16.0/
run ./configure --prefix=/usr/local/nginx --group=nginx --user=nginx
run make
&&make
install
run mkdir /tmp/nginx
expose 80
cmd /bin/sh -c 'nginx -g "daemon off;"'
[root@localhost nginx]
# ls
dockerfile nginx-1.16.0.tar.gz
[root@localhost nginx]
# docker build -t nginx:v1 .
使用dockerfile安裝nginx時
需要執行daemon off命令。放置前台啟動
nginx預設是以後臺模式啟動的，docker未執行自定義的cmd之前，nginx的pid是1，執行到cmd之後，nginx就在後台執行，bash或sh指令碼的pid變成了1。所以一旦執行完自定義cmd，nginx容器也就退出了。為了保持nginx的容器不退出，應該關閉nginx後台執行
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