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tutorial:adm:server_preparation_tmp [2020/07/24 08:37]
fiserp [DB server configuration] 		tutorial:adm:server_preparation_tmp [2020/07/24 09:01]
fiserp [Start Tomcat automatically after system startup]
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 ===== Java - CentOS8 ===== ===== Java - CentOS8 =====
  
-Java must be installed before Tomcat start. It is recommended to use OpenJDK (at least 1.11) from standard OS repository.+Tomcat application server needs Java installed. We recommend to use OpenJDK 11 from standard OS repository. (OpenJDK 1.8 is also supported, check [[devel:documentation:compatibility|compatibility page]]).
  
 Installation: Installation:
-<code bash> +<code> 
-yum install -y java-11-openjdk-headless java-11-openjdk-devel+dnf install -y java-11-openjdk-headless java-11-openjdk-devel
 </code> </code>
  
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 <code> <code>
 groupadd -r tomcat groupadd -r tomcat
-useradd -r -s /bin/nologin -g tomcat -d /opt/tomcat tomcat+useradd -r -s /usr/sbin/nologin -g tomcat -d /opt/tomcat tomcat
 getent passwd tomcat getent passwd tomcat
-#tomcat:x:995:993::/opt/tomcat:/bin/nologin+#tomcat:x:995:993::/opt/tomcat:/usr/sbin/nologin
 </code> </code>
  
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 </code> </code>
  
-  * Download Apache Tomcat 8.5.x from the website [[https://tomcat.apache.org/download-80.cgi]] to **/opt/tomcat/** +  * Download Apache Tomcat 8.5.x from the website [[https://tomcat.apache.org/download-80.cgi]] to ''/opt/tomcat/'' 
-    * In our exapmle the version is 8.5.8.+    * In our exapmle the version is 8.5.57.
  
-  * extract files from archive:+  * extract files from the archive:
  
 <code bash> <code bash>
-tar xzf apache-tomcat-8.5.8.tar.gz+tar xzf apache-tomcat-8.5.57.tar.gz
 </code> </code>
  
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 <code bash> <code bash>
 cd /opt/tomcat cd /opt/tomcat
-ln -s apache-tomcat-8.5.8 current+ln -s apache-tomcat-8.5.57 current
 </code> </code>
  
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 chmod 750 /opt/tomcat chmod 750 /opt/tomcat
 cd /opt/tomcat/current cd /opt/tomcat/current
-chmod o+rX -R ./+chmod -R o+rX ./
 chgrp -R tomcat conf/ bin/ lib/ chgrp -R tomcat conf/ bin/ lib/
-chmod g+rwx conf+chmod g+rx conf
 chmod g+r conf/* chmod g+r conf/*
 chown -R tomcat webapps/ work/ temp/ logs/ chown -R tomcat webapps/ work/ temp/ logs/
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 [Unit] [Unit]
 Description=Apache Tomcat Web Application Container Description=Apache Tomcat Web Application Container
-After=syslog.target network.target+After=syslog.target network.target postgresql.service
  
 [Service] [Service]
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 WantedBy=multi-user.target WantedBy=multi-user.target
 </file> </file>
 +<note>
 +  * Values of ''-Xms'' and ''-Xmx'' se are closely dependent on server sizing. If you have enough memory, we strongly recommend to use ''-Xmx 6128M'' or more.
 +  * Tomcat will be started under user ''tomcat:tomcat''.
 +</note>
  
-  * Values of Xms a Xmx se are closely dependent on server sizing. If you have enough memory it is strongly advised to use Xmx 6128M or more. +  * Reload systemd configuration:
- +
-  * Tomcat will be started under user ''tomcat:tomcat'' a will use java installed in ''/usr/lib/jvm/java-1.8.0-openjdk''. +
-  * After every systemd configuration change it is necessary to reload:+
  
 <code> <code>
 systemctl daemon-reload systemctl daemon-reload
 </code> </code>
-  * Test start:+ 
 +  * Start the Tomcat to ensure it is configured properly. Enable its start on OS start. 
 <code> <code>
 systemctl start tomcat systemctl start tomcat
 +systemctl enable tomcat
 </code> </code>
 +
   * Check that Tomcat runs with desirable parameters:   * Check that Tomcat runs with desirable parameters:
 +
 <code bash> <code bash>
 [root@tomcat1 logs]# ps -u tomcat -fwww [root@tomcat1 logs]# ps -u tomcat -fwww
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 tomcat    1602     1  1 09:44 ?        00:00:02 /usr/lib/jvm/java-openjdk/bin/java -Djava.util.logging.config.file=/opt/tomcat/current/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true -Djavax.servlet.request.encoding=UTF-8 -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Xms512M -Xmx1024M -server -XX:+UseParallelGC -classpath /opt/tomcat/current/bin/bootstrap.jar:/opt/tomcat/current/bin/tomcat-juli.jar -Dcatalina.base=/opt/tomcat/current -Dcatalina.home=/opt/tomcat/current -Djava.io.tmpdir=/opt/tomcat/current/temp org.apache.catalina.startup.Bootstrap start tomcat    1602     1  1 09:44 ?        00:00:02 /usr/lib/jvm/java-openjdk/bin/java -Djava.util.logging.config.file=/opt/tomcat/current/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true -Djavax.servlet.request.encoding=UTF-8 -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Xms512M -Xmx1024M -server -XX:+UseParallelGC -classpath /opt/tomcat/current/bin/bootstrap.jar:/opt/tomcat/current/bin/tomcat-juli.jar -Dcatalina.base=/opt/tomcat/current -Dcatalina.home=/opt/tomcat/current -Djava.io.tmpdir=/opt/tomcat/current/temp org.apache.catalina.startup.Bootstrap start
 </code> </code>
-  * Stop Apache Tomcat:+ 
 +  * Stop the Tomcat. 
 <code> <code>
 systemctl stop tomcat systemctl stop tomcat
-</code> 
-  * Enable tomcat start after OS start: 
-<code bash> 
-systemctl enable tomcat 
 </code> </code>