CLOUDSTACK-8625: Systemd profile for CloudStack Agent

With CentOS 7 and Ubuntu 16.04 (to be released) using systemd
it is preferred that CloudStack's Agent is also being started using
systemd.

This commit includes a service file for the CloudStack Agent with
a wrapper script which actually executes Java

It no longer uses jsvc for daemonizing and thus this requirement
has also been dropped for CentOS 7 packaging.

The Agent log output to stdout has also been modified to no longer
include the timestamp as this is done by journalctl.

This has been tested on a CentOS 7.1 machine and the Agent starts,
stops and restarts properly.

agent/conf/log4j-cloud.xml.in

@@ -47,7 +47,7 @@ under the License.
       <param name="Threshold" value="INFO"/>
 
       <layout class="org.apache.log4j.PatternLayout">
-         <param name="ConversionPattern" value="%d{ISO8601}{GMT} %-5p [%c{3}] (%t:%x) %m%n"/>
+         <param name="ConversionPattern" value="%-5p [%c{3}] (%t:%x) %m%n"/>
       </layout>
    </appender>
 

packaging/centos7/cloud.spec

@@ -107,9 +107,6 @@ Requires: iptables
 Requires: ethtool
 Requires: iproute
 Requires: ipset
-Requires: jsvc
-Requires: jakarta-commons-daemon
-Requires: jakarta-commons-daemon-jsvc
 Requires: perl
 Requires: libvirt-python
 Requires: qemu-img
@@ -206,6 +203,7 @@ mkdir -p ${RPM_BUILD_ROOT}%{_datadir}/%{name}-common/scripts
 mkdir -p ${RPM_BUILD_ROOT}%{_datadir}/%{name}-common/vms
 mkdir -p ${RPM_BUILD_ROOT}%{python_sitearch}/
 mkdir -p ${RPM_BUILD_ROOT}%/usr/bin
+mkdir -p ${RPM_BUILD_ROOT}/usr/lib/systemd/system
 cp -r scripts/* ${RPM_BUILD_ROOT}%{_datadir}/%{name}-common/scripts
 install -D systemvm/dist/systemvm.iso ${RPM_BUILD_ROOT}%{_datadir}/%{name}-common/vms/systemvm.iso
 install -D systemvm/dist/systemvm.zip ${RPM_BUILD_ROOT}%{_datadir}/%{name}-common/vms/systemvm.zip
@@ -294,7 +292,7 @@ mkdir -p ${RPM_BUILD_ROOT}%{_sysconfdir}/%{name}/agent
 mkdir -p ${RPM_BUILD_ROOT}%{_localstatedir}/log/%{name}/agent
 mkdir -p ${RPM_BUILD_ROOT}%{_datadir}/%{name}-agent/lib
 mkdir -p ${RPM_BUILD_ROOT}%{_datadir}/%{name}-agent/plugins
-install -D packaging/centos7/cloud-agent.rc ${RPM_BUILD_ROOT}%{_sysconfdir}/init.d/%{name}-agent
+install -D packaging/systemd/cloudstack-agent.service ${RPM_BUILD_ROOT}/usr/lib/systemd/system/cloudstack-agent.service
 install -D agent/target/transformed/agent.properties ${RPM_BUILD_ROOT}%{_sysconfdir}/%{name}/agent/agent.properties
 install -D agent/target/transformed/environment.properties ${RPM_BUILD_ROOT}%{_sysconfdir}/%{name}/agent/environment.properties
 install -D agent/target/transformed/log4j-cloud.xml ${RPM_BUILD_ROOT}%{_sysconfdir}/%{name}/agent/log4j-cloud.xml
@@ -373,7 +371,6 @@ fi
 /sbin/service cloudstack-agent stop || true
 if [ "$1" == "0" ] ; then
     /sbin/chkconfig --del cloudstack-agent > /dev/null 2>&1 || true
-    /sbin/service cloudstack-agent stop > /dev/null 2>&1 || true
 fi
 
 %pre agent
@@ -393,8 +390,7 @@ if [ "$1" == "1" ] ; then
     fi
     cp -a ${RPM_BUILD_ROOT}%{_datadir}/%{name}-agent/lib/libvirtqemuhook %{_sysconfdir}/libvirt/hooks/qemu
     /sbin/service libvirtd restart
-    /sbin/chkconfig --add cloudstack-agent > /dev/null 2>&1 || true
-    /sbin/chkconfig --level 345 cloudstack-agent on > /dev/null 2>&1 || true
+    /sbin/systemctl enable cloudstack-agent > /dev/null 2>&1 || true
 fi
 
 # if saved configs from upgrade exist, copy them over

packaging/systemd/cloudstack-agent-systemd-wrapper.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Wrapper for starting CloudStack Agent under systemd
+#
+# ExecStart=/usr/libexec/cloudstack/cloudstack-agent-systemd-wrapper.sh
+#
+
+ACP=`ls /usr/share/cloudstack-agent/lib/*.jar | tr '\n' ':' | sed s'/.$//'`
+PCP=`ls /usr/share/cloudstack-agent/plugins/*.jar 2>/dev/null | tr '\n' ':' | sed s'/.$//'`
+
+CLASSPATH="$ACP:$PCP:/etc/cloudstack/agent:/usr/share/cloudstack-common/scripts"
+
+${JAVA_HOME}/bin/java -Xms${JAVA_HEAP_INITIAL} -Xmx${JAVA_HEAP_MAX} -cp "$CLASSPATH" $JAVA_CLASS
+
+exit $?

packaging/systemd/cloudstack-agent.service

@@ -0,0 +1,35 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+[Unit]
+Description=CloudStack Agent
+Documentation=http://www.cloudstack.org/
+Requires=libvirtd.service
+After=libvirtd.service
+
+[Service]
+Type=simple
+Environment=JAVA_HOME=/usr/lib/jvm/jre
+Environment=JAVA_HEAP_INITIAL=256m
+Environment=JAVA_HEAP_MAX=2048m
+Environment=JAVA_CLASS=com.cloud.agent.AgentShell
+ExecStart=/usr/libexec/cloudstack/cloudstack-agent-systemd-wrapper.sh
+Restart=always
+RestartSec=10s
+
+[Install]
+WantedBy=multi-user.target