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Description of problem: Munin fails to perform data collection from monitored nodes if munin-asyncd is configured. Version-Release number of selected component (if applicable): munin-2.0.43-1.fc28.noarch How reproducible: Always Steps to Reproduce: 1. Configure a node with munin-asyncd (https://munin.readthedocs.io/en/stable-2.0/node/async.html#node-async) 2. Wait for data collection attempt Actual results: No data is collected. SELinux AVC denials appear in audit.log. Expected results: Successful data collection without SELinux AVC denials. Additional info: The following AVC denials are visible in audit.log in permissive mode: type=AVC msg=audit(1545746402.190:1663): avc: denied { execute } for pid=11163 comm="/usr/share/muni" name="ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746402.190:1664): avc: denied { read open } for pid=11163 comm="/usr/share/muni" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746402.190:1665): avc: denied { execute_no_trans } for pid=11163 comm="/usr/share/muni" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746402.191:1666): avc: denied { map } for pid=11163 comm="ssh" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746402.196:1667): avc: denied { name_connect } for pid=11163 comm="ssh" dest=22 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_port_t:s0 tclass=tcp_socket permissive=1 type=AVC msg=audit(1545746702.033:1681): avc: denied { execute } for pid=11958 comm="/usr/share/muni" name="ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746702.033:1682): avc: denied { read open } for pid=11958 comm="/usr/share/muni" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746702.033:1683): avc: denied { execute_no_trans } for pid=11958 comm="/usr/share/muni" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746702.034:1684): avc: denied { map } for pid=11958 comm="ssh" path="/usr/bin/ssh" dev="dm-1" ino=1463052 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_exec_t:s0 tclass=file permissive=1 type=AVC msg=audit(1545746702.039:1685): avc: denied { name_connect } for pid=11958 comm="ssh" dest=22 scontext=system_u:system_r:munin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ssh_port_t:s0 tclass=tcp_socket permissive=1 The following SELinux policy works around the issue, but it was simply generated with audit2allow, so I'm not sure if it's correct: # cat munin-local.cil (allow munin_t ssh_exec_t(file (execute execute_no_trans map open read))) (allow munin_t ssh_port_t(tcp_socket (name_connect)))
Fix for this should be included in bug #1164245, see attachment "Munin patch for rhel 7.5 munin policy".
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