Solution to the docker command exception "permission denied"

sudo groupadd docker #Add the docker user group. This user group should already exist. sudo gpasswd -a $USER docker #Add the current user to the docker user group. newgrp docker #Update the user group docker.

root@08066d03a043:/usr/local/tomcat# cd webapps/
root@08066d03a043:/usr/local/tomcat/webapps# ls
ls: cannot open directory '.': Permission denied
root@08066d03a043:/usr/local/tomcat/webapps#

[daniu@localhost tomcat]$ docker run -d -p 9091:8080 -v /home/daniu/docker/tomcat/webapps/:/usr/local/tomcat/webapps/ --privileged=true --name managertomcat xuhaixing/mytomcat
c512137b74f3366da73ff80fc1fd232cc76c95b52a4bab01f1f5d89d28185b28
[daniu@localhost tomcat]$ ls

[daniu@localhost tomcat]# setenforce 0
[daniu@localhost tomcat]# setenforce 1

# The format for changing security context is as follows: chcon [-R] [-t type] [-u user] [-r role] File or directory options without parameters: 
-R: All directories under this directory are also modified at the same time; 
-t: followed by the type field of the security document, for example httpd_sys_content_t; 
-u : followed by identity identification, for example system_u; 
-r: The color of the following street, for example system_r
implement:
chcon -Rt svirt_sandbox_file_t /home/daniu/docker/tomcat/webapps/