Detailed explanation of the processing of the three Docker Nginx Logs

docker run --name docker_nginx -d -p 80:80\ 
 -v /var/log/nginx/log:/var/log/nginx\
--!-v: Mount the log directory

RUN \

  ln -sf /dev/stdout /var/log/nginx/access.log && \    
  ln -sf /dev/stderr /var/log/nginx/error.log 

FROM env_centos:latest
 
COPY nginx.repo /etc/yum.repos.d/ 
# Note that the log output must be redirected to stdout, otherwise the container log output cannot be seen RUN \
  yum -y install nginx httpd-tools && \
  mkdir -p /data/nginx_conf/upstream && \
  mkdir -p /data/nginx_conf/vhosts && \
  rm -f /etc/nginx/conf.d/default.conf && \
  ln -sf /dev/stdout /var/log/nginx/access.log && \ > These two lines are the key. Of course, this should match your nginx configuration file. Don't copy it. ln -sf /dev/stderr /var/log/nginx/error.log > These two lines are the key. COPY nginx.conf /etc/nginx/nginx.conf
 
EXPOSE 80
#EXPOSE 443
 
CMD ["nginx", "-g", "daemon off;"]

#docker exec test123 ls -l /var/log/nginx/
lrwxrwxrwx 1 root root 11 Dec 29 10:51 access.log -> /dev/stdout
lrwxrwxrwx 1 root root 11 Dec 29 10:51 error.log -> /dev/stderr