Description of problem:
SELinux is preventing (boltd) from 'mounton' accesses on the directory /run/systemd/unit-root/run/boltd.

*****  Plugin restorecon (99.5 confidence) suggests   ************************

If you want to fix the label. 
/run/systemd/unit-root/run/boltd default label should be init_var_run_t.
Then you can run restorecon. The access attempt may have been stopped due to insufficient permissions to access a parent directory in which case try to change the following command accordingly.
Do
# /sbin/restorecon -v /run/systemd/unit-root/run/boltd

*****  Plugin catchall (1.49 confidence) suggests   **************************

If you believe that (boltd) should be allowed mounton access on the boltd directory by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c '(boltd)' --raw | audit2allow -M my-boltd
# semodule -X 300 -i my-boltd.pp

Additional Information:
Source Context                system_u:system_r:init_t:s0
Target Context                system_u:object_r:boltd_var_run_t:s0
Target Objects                /run/systemd/unit-root/run/boltd [ dir ]
Source                        (boltd)
Source Path                   (boltd)
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-5.fc30.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.19.0-0.rc6.git3.1.fc30.x86_64 #1
                              SMP Thu Oct 4 14:38:21 UTC 2018 x86_64 x86_64
Alert Count                   1
First Seen                    2018-10-06 15:58:44 +05
Last Seen                     2018-10-06 15:58:44 +05
Local ID                      15e427ed-28bd-44e9-8ad1-3bedafa2d593

Raw Audit Messages
type=AVC msg=audit(1538823524.22:239): avc:  denied  { mounton } for  pid=2659 comm="(boltd)" path="/run/systemd/unit-root/run/boltd" dev="tmpfs" ino=50740 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:boltd_var_run_t:s0 tclass=dir permissive=0


Hash: (boltd),init_t,boltd_var_run_t,dir,mounton

Version-Release number of selected component:
selinux-policy-3.14.3-5.fc30.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.19.0-0.rc6.git3.1.fc30.x86_64
type:           libreport