Description of problem:
SELinux is preventing sss_cache from 'write' accesses on the directory /var/lib/sss/db.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that sss_cache should be allowed write access on the db 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 'sss_cache' --raw | audit2allow -M my-ssscache
# semodule -X 300 -i my-ssscache.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:groupadd_t:s0-s0:c0.c102
                              3
Target Context                system_u:object_r:sssd_var_lib_t:s0
Target Objects                /var/lib/sss/db [ dir ]
Source                        sss_cache
Source Path                   sss_cache
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           sssd-common-1.16.3-2.fc28.x86_64
Policy RPM                    selinux-policy-3.14.1-48.fc28.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.18.18-200.fc28.x86_64 #1 SMP Mon
                              Nov 12 03:17:32 UTC 2018 x86_64 x86_64
Alert Count                   2
First Seen                    2018-12-02 11:29:19 EET
Last Seen                     2018-12-02 11:29:19 EET
Local ID                      7810897b-b8a5-4ea7-9f76-51fc0c6dac42

Raw Audit Messages
type=AVC msg=audit(1543742959.687:591): avc:  denied  { write } for  pid=7604 comm="sss_cache" name="db" dev="dm-1" ino=1975299 scontext=unconfined_u:unconfined_r:groupadd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sssd_var_lib_t:s0 tclass=dir permissive=0


Hash: sss_cache,groupadd_t,sssd_var_lib_t,dir,write

Version-Release number of selected component:
selinux-policy-3.14.1-48.fc28.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.6
hashmarkername: setroubleshoot
kernel:         4.19.5-200.fc28.x86_64
type:           libreport