Symlink from /opt/<component>/var/log to /var/log/<component>. (#…

…7999)

* Symlink from /opt/<component>/var/log to /var/log/<component>.

These symlinks are deprecated with the intent of removing them in ATC 9.0.0.

* Update rpm-maven-plugin to 2.2.0 to get symlink support

Symlink support is added in mojohaus/rpm-maven-plugin#42.

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Updated the CacheGroups Traffic Portal page to use a more performant AG-Grid-based table.
 - Updated Go version to 1.22.0
 - [#7979](https://github.com/apache/trafficcontrol/pull/7979) *Traffic Router*, *Traffic Monitor*, *Traffic Stats*: Store logs in /var/log
+- [#7999](https://github.com/apache/trafficcontrol/pull/7999) *Traffic Router*, *Traffic Monitor*, *Traffic Stats*: Symlink from /opt/<component>/var/log to /var/log/<component>. These symlinks are deprecated with the intent of removing them in ATC 9.0.0.
 - [#7872](https://github.com/apache/trafficcontrol/issues/7872) *Traffic Router*: Updated Apache Tomcat from 9.0.43, 9.0.67, 9.0.83, and 9.0.86 to 9.0.87.
 
 ### Fixed

traffic_monitor/build/traffic_monitor.spec

@@ -49,6 +49,8 @@ mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_monitor/backup
 mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_monitor/static
 mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_monitor/var/run
 mkdir -p "${RPM_BUILD_ROOT}"/var/log/traffic_monitor
+# TODO: The /opt/traffic_monitor/var/log symlink is deprecated and should be removed for ATC 9.0.0.
+ln -s /var/log/traffic_monitor "${RPM_BUILD_ROOT}"/opt/traffic_monitor/var/log
 mkdir -p "${RPM_BUILD_ROOT}"/etc/init.d
 mkdir -p "${RPM_BUILD_ROOT}"/etc/logrotate.d
 
@@ -108,6 +110,8 @@ fi
 %dir /opt/traffic_monitor/backup
 %dir /opt/traffic_monitor/static
 %dir /opt/traffic_monitor/var
+# TODO: The /opt/traffic_monitor/var/log symlink is deprecated and should be removed for ATC 9.0.0.
+/opt/traffic_monitor/var/log
 %dir /var/log/traffic_monitor
 %dir /opt/traffic_monitor/var/run
 

traffic_router/build/pom.xml

@@ -120,7 +120,7 @@
 					<plugin>
 						<groupId>org.codehaus.mojo</groupId>
 						<artifactId>rpm-maven-plugin</artifactId>
-						<version>2.1.4</version>
+						<version>2.2.0</version>
 						<extensions>true</extensions>
 						<executions>
 							<execution>
@@ -167,6 +167,21 @@
 									<username>root</username>
 									<groupname>root</groupname>
 								</mapping>
+								<mapping>
+									<directory>${deploy.dir}/var</directory>
+									<filemode>755</filemode>
+									<username>root</username>
+									<groupname>root</groupname>
+									<sources>
+										<!-- TODO: The /opt/traffic_router/var/log symlink is deprecated and should be removed
+											 for ATC 9.0.0. -->
+										<softLinkSource>
+											<destination>log</destination>
+											<location>/var/log/traffic_router</location>
+											<failIfLocationNotExists>false</failIfLocationNotExists>
+										</softLinkSource>
+									</sources>
+								</mapping>
 								<mapping>
 									<directory>${deploy.dir}/temp</directory>
 									<filemode>755</filemode>
@@ -248,6 +263,11 @@
 									</sources>
 								</mapping>
 							</mappings>
+							<installScriptlet>
+								<!-- TODO: The /opt/traffic_router/var/log symlink is deprecated and should be removed
+								     for ATC 9.0.0. -->
+								<script>ln -s /var/log/traffic_router %{buildroot}${deploy.dir}/var/log</script>
+							</installScriptlet>
 							<requires>
 								<require>java-11-openjdk-headless</require>
 								<require>tzdata-java</require>

traffic_router/tomcat-rpm/tomcat.spec

@@ -40,9 +40,11 @@ Built:@BUILT@
 %build
 
 %install
-mkdir -p "${RPM_BUILD_ROOT}"/var/log/tomcat
 install -d -m 755 ${RPM_BUILD_ROOT}/%{tomcat_home}/
+rmdir logs
+mkdir -p "${RPM_BUILD_ROOT}"/var/log/tomcat
 cp -R * ${RPM_BUILD_ROOT}/%{tomcat_home}/
+ln -s /var/log/tomcat "${RPM_BUILD_ROOT}"%{tomcat_home}/logs
 
 # Remove all webapps.
 rm -rf ${RPM_BUILD_ROOT}/%{tomcat_home}/webapps/*

traffic_stats/build/traffic_stats.spec

@@ -65,6 +65,8 @@ mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_stats/backup
 mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_stats/influxdb_tools
 mkdir -p "${RPM_BUILD_ROOT}"/opt/traffic_stats/var/run
 mkdir -p "${RPM_BUILD_ROOT}"/var/log/traffic_stats
+# TODO: The /opt/traffic_stats/var/log symlink is deprecated and should be removed for ATC 9.0.0.
+ln -s /var/log/traffic_stats "${RPM_BUILD_ROOT}"/opt/traffic_stats/var/log
 mkdir -p "${RPM_BUILD_ROOT}"/etc/init.d
 mkdir -p "${RPM_BUILD_ROOT}"/etc/logrotate.d
 mkdir -p "${RPM_BUILD_ROOT}"/var/lib/grafana/plugins/trafficcontrol-scenes-app
@@ -129,6 +131,8 @@ fi
 %dir /opt/traffic_stats/conf
 %dir /opt/traffic_stats/backup
 %dir /opt/traffic_stats/var
+# TODO: The /opt/traffic_stats/var/log symlink is deprecated and should be removed for ATC 9.0.0.
+/opt/traffic_stats/var/log
 %dir /opt/traffic_stats/var/run
 %dir /var/log/traffic_stats
 %dir /var/lib/grafana/plugins/trafficcontrol-scenes-app