Merge pull request #1618 from sebres/_0.10/systemd-service

ChangeLog

@@ -29,6 +29,16 @@ TODO: implementing of options resp. other tasks from PR #1346
   environment (without lock)
 * Fixed sporadically error in testCymruInfoNxdomain, because of unsorted values
 * Misleading errors logged from ignorecommand in success case on retcode 1 (gh-1194)
+* fail2ban.service - systemd service updated (gh-1618):
+  - starting service in normal mode (without forking)
+  - does not restart if service exited normally (exit-code 0, e.g. stopped via fail2ban-client)
+  - does not restart if service can not start (exit-code 255, e.g. wrong configuration, etc.)
+  - service can be additionally started/stopped with commands (fail2ban-client, fail2ban-server)
+  - automatically creates `/var/run/fail2ban` directory before start fail2ban 
+    (systems with virtual resp. memory-based FS for `/var/run`), see gh-1531
+  - if fail2ban running as systemd-service, for logging to the systemd-journal, 
+    the `logtarget` could be set to STDOUT
+  - value `logtarget` for system targets allowed also in lowercase (stdout, stderr, syslog, etc.)
 
 ### New Features
 * IPv6 support:

fail2ban/client/fail2bancmdline.py

@@ -297,6 +297,7 @@ class Fail2banCmdLine():
 	def exit(code=0):
 		logSys.debug("Exit with code %s", code)
 		# because of possible buffered output in python, we should flush it before exit:
+		logging.shutdown()
 		sys.stdout.flush()
 		sys.stderr.flush()
 		# exit

fail2ban/server/server.py

@@ -530,17 +530,19 @@ class Server:
 	# @param target the logging target
 	
 	def setLogTarget(self, target):
+		# check reserved targets in uppercase, don't change target, because it can be file:
+		systarget = target.upper()
 		with self.__loggingLock:
 			# don't set new handlers if already the same
 			# or if "INHERITED" (foreground worker of the test cases, to prevent stop logging):
 			if self.__logTarget == target:
 				return True
-			if target == "INHERITED":
+			if systarget == "INHERITED":
 				self.__logTarget = target
 				return True
 			# set a format which is simpler for console use
 			fmt = "%(asctime)s %(name)-24s[%(process)d]: %(levelname)-7s %(message)s"
-			if target == "SYSLOG":
+			if systarget == "SYSLOG":
 				# Syslog daemons already add date to the message.
 				fmt = "%(name)s[%(process)d]: %(levelname)s %(message)s"
 				facility = logging.handlers.SysLogHandler.LOG_DAEMON
@@ -559,9 +561,9 @@ class Server:
 						"Syslog socket file: %s does not exists"
 						" or is not a socket" % self.__syslogSocket)
 					return False
-			elif target == "STDOUT":
+			elif systarget == "STDOUT":
 				hdlr = logging.StreamHandler(sys.stdout)
-			elif target == "STDERR":
+			elif systarget == "STDERR":
 				hdlr = logging.StreamHandler(sys.stderr)
 			else:
 				# Target should be a file

files/fail2ban.service

@@ -5,12 +5,16 @@ After=network.target iptables.service firewalld.service
 PartOf=iptables.service firewalld.service
 
 [Service]
-Type=forking
+Type=simple
-ExecStart=/usr/bin/fail2ban-client -x start
+ExecStartPre=/bin/mkdir -p /var/run/fail2ban
+ExecStart=/usr/bin/fail2ban-server -xf start
+# if should be logged in systemd journal, use following line or set logtarget to stdout in fail2ban.local
+# ExecStart=/usr/bin/fail2ban-server -xf --logtarget=stdout start
 ExecStop=/usr/bin/fail2ban-client stop
 ExecReload=/usr/bin/fail2ban-client reload
 PIDFile=/var/run/fail2ban/fail2ban.pid
-Restart=always
+Restart=on-failure
+RestartPreventExitStatus=0 255
 
 [Install]
 WantedBy=multi-user.target

man/fail2ban-server.1

@@ -23,6 +23,9 @@ pidfile path
 logging level
 .HP
 \fB\-\-logtarget\fR <FILE>|STDOUT|STDERR|SYSLOG
+logging target
+.br
+Note. If fail2ban running as systemd-service, for logging to the systemd-journal, the logtarget could be set to STDOUT
 .HP
 \fB\-\-syslogsocket\fR auto|<FILE>
 .TP

man/jail.conf.5

@@ -130,7 +130,9 @@ The items that can be set are:
 verbosity level of log output: CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG, TRACEDEBUG, HEAVYDEBUG or corresponding numeric value (50-5). Default: ERROR (equal 40)
 .TP
 .B logtarget
-log target: filename, SYSLOG, STDERR or STDOUT. Default: STDERR
+log target: filename, SYSLOG, STDERR or STDOUT. Default: STDOUT if not set in fail2ban.conf/fail2ban.local
+.br
+Note. If fail2ban running as systemd-service, for logging to the systemd-journal, the logtarget could be set to STDOUT
 .br
 Only a single log target can be specified.
 If you change logtarget from the default value and you are using logrotate -- also adjust or disable rotation in the