Docker挂载主机目录出现Permission denied状况分析

docker run -i -t -v /data/mysql/data:/data/var-3306 --privileged=true b0387b8279d4 /bin/bash -c "/opt/start_db.sh"

setenforce 0

# 更改安全性文本的格式如下
chcon [-R] [-t type] [-u user] [-r role] 文件或者目录

选顷不参数： 
-R  ：连同该目录下癿次目录也同时修改； 
-t  ：后面接安全性本文的类型字段！例如 httpd_sys_content_t ； 
-u  ：后面接身份识别，例如 system_u； 
-r  ：后面街觇色，例如 system_r

[root@localhost Desktop]# chcon --help
Usage: chcon [OPTION]... CONTEXT FILE...
  or:  chcon [OPTION]... [-u USER] [-r ROLE] [-l RANGE] [-t TYPE] FILE...
  or:  chcon [OPTION]... --reference=RFILE FILE...
Change the SELinux security context of each FILE to CONTEXT.
With --reference, change the security context of each FILE to that of RFILE.

Mandatory arguments to long options are mandatory for short options too.
      --dereference      affect the referent of each symbolic link (this is
                         the default), rather than the symbolic link itself
  -h, --no-dereference   affect symbolic links instead of any referenced file
  -u, --user=USER        set user USER in the target security context
  -r, --role=ROLE        set role ROLE in the target security context
  -t, --type=TYPE        set type TYPE in the target security context
  -l, --range=RANGE      set range RANGE in the target security context
      --no-preserve-root  do not treat '/' specially (the default)
      --preserve-root    fail to operate recursively on '/'
      --reference=RFILE  use RFILE's security context rather than specifying
                         a CONTEXT value
  -R, --recursive        operate on files and directories recursively
  -v, --verbose          output a diagnostic for every file processed

The following options modify how a hierarchy is traversed when the -R
option is also specified.  If more than one is specified, only the final
one takes effect.

  -H                     if a command line argument is a symbolic link
                         to a directory, traverse it
  -L                     traverse every symbolic link to a directory
                         encountered
  -P                     do not traverse any symbolic links (default)

      --help     display this help and exit
      --version  output version information and exit

GNU coreutils online help: 
For complete documentation, run: info coreutils 'chcon invocation'

[root@localhost Desktop]# chcon -Rt svirt_sandbox_file_t /data/mysql/data