Support syspurpose role matching in recommend.conf

Resolves: rhbz#1565598

Signed-off-by: Ondřej Lysoněk <olysonek@redhat.com>

tuned.spec

@@ -67,6 +67,9 @@ Requires: util-linux, dbus, polkit
 %if 0%{?fedora} > 22 || 0%{?rhel} > 7
 Recommends: kernel-tools
 %endif
+%if 0%{?rhel} > 7
+Requires: python3-syspurpose
+%endif
 
 %description
 The tuned package contains a daemon that tunes system settings dynamically.

tuned/utils/commands.py

@@ -10,6 +10,11 @@ import procfs
 from subprocess import *
 from tuned.exceptions import TunedException
 import dmidecode
+try:
+	import syspurpose.files
+	have_syspurpose = True
+except:
+	have_syspurpose = False
 
 log = tuned.logs.get()
 
@@ -421,6 +426,23 @@ class commands:
 								break
 						else:
 							match = False
+					elif option == "syspurpose_role":
+						if have_syspurpose:
+							s = syspurpose.files.SyspurposeStore(
+									syspurpose.files.USER_SYSPURPOSE,
+									raise_on_error = True)
+							role = ""
+							try:
+								s.read_file()
+								role = s.contents["role"]
+							except (IOError, OSError, KeyError) as e:
+								if hasattr(e, "errno") and e.errno != errno.ENOENT:
+									log.error("Failed to load the syspurpose file: %s" % e)
+							if re.match(value, role, re.IGNORECASE) is None:
+								match = False
+						else:
+							log.error("Failed to process 'syspurpose_role' in '%s', the syspurpose module is not available" % fname)
+
 				if match:
 					# remove the ",.*" suffix
 					r = re.compile(r",[^,]*$")