docker - 如何在不出错的情况下扩展nginx docker镜像systemctl:找不到命令？

Question

我想从nginx镜像构建自己的自定义docker镜像。

我用自己的ENTERYPOINT文件覆盖了Nginx的ENTRYPOINT。

这给我带来了两个问题:

我认为这样做会丢失Nginx的一些命令。我对吗？ (例如暴露端口。)

如果要重新启动Nginx，请运行以下命令:nginx -t && systemctl reload nginx。但输出是:
nginx: configuration file /etc/nginx/nginx.conf test is successful/entrypoint.sh: line 5: systemctl: command not found

如何解决？

FROM nginx:latest

WORKDIR /

RUN echo "deb http://ftp.debian.org/debian stretch-backports main" >> /etc/apt/sources.list

RUN apt-get -y update && \
    apt-get -y install apt-utils && \
    apt-get -y upgrade && \
    apt-get -y clean

# I ALSO WANT TO INSTALL CERBOT FOR LATER USE (in my entrypoint file)

RUN apt-get -y install python-certbot-nginx -t stretch-backports

# COPY ./something ./tothisimage 
# COPY ./something ./tothisimage 
# COPY ./something ./tothisimage 
# COPY ./something ./tothisimage 

COPY entrypoint.sh /entrypoint.sh

ENTRYPOINT ["bash", "/entrypoint.sh"]

entrypoint.sh

echo "in entrypoint"

# I want to run some commands here... 

# After I want to run nginx normally....

nginx -t && systemctl reload nginx

echo "after reload"

Answer 1

这将使用service命令起作用:

echo "in entrypoint"

# I want to run some commands here... 

# After I want to run nginx normally....

nginx -t && service nginx reload

echo "after reload"

输出:

in entrypoint
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
Restarting nginx: nginx.
after reload