DevOps Classroom Series – 07/Sept/2020

tomcat installation contd

• Created a template ‘tomcat.service.erb’

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=<%= node['tomcat9']['JAVA_HOME']  %>
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

• Added a new attribute to attributes file

if platform?('ubuntu')
  default['tomcat9']['java'] = 'openjdk-11-jdk'
  default['tomcat9']['JAVA_HOME']= '/usr/lib/jvm/java-1.11.0-openjdk-amd64'
 
elsif platform?('centos')
  default['tomcat9']['java']= 'java-11-openjdk-devel'
  default['tomcat9']['JAVA_HOME']= '/usr/lib/jvm/java-11-openjdk-11.0.8.10-0.el7_8.x86_64'
end

default['tomcat9']['service_file_location'] = '/etc/systemd/system/tomcat.service'
default['tomcat9']['group'] = 'tomcat'
default['tomcat9']['user'] = 'tomcat'
default['tomcat9']['downloadurl'] = 'http://apachemirror.wuchna.com/tomcat/tomcat-9/v9.0.37/bin/apache-tomcat-9.0.37.tar.gz'
default['tomcat9']['downloadlocation'] = '/tmp/tomcat9.tar.gz'
default['tomcat9']['tomcat_location'] = '/opt/tomcat'
default['tomcat9']['permission_directories'] = ['/opt/tomcat', '/opt/tomcat/conf', '/opt/tomcat/webapps/', '/opt/tomcat/work', '/opt/tomcat/temp/', '/opt/tomcat/logs/']
default['tomcat9']['tomcat-users-location'] = '/opt/tomcat/conf/tomcat-users.xml'
default['tomcat9']['manager-context'] = '/opt/tomcat/webapps/manager/META-INF/context.xml'
default['tomcat9']['hostmanager-context'] = '/opt/tomcat/webapps/manager/META-INF/context.xml'

default['tomcat9']['sampleappurl'] = 'https://referenceappkhaja.s3-us-west-2.amazonaws.com/gameoflife.war'
default['tomcat9']['sampleapplocation'] = '/opt/tomcat/webapps/gameoflife.war'
default['tomcat9']['adminuser'] = 'admin'
default['tomcat9']['adminpassword'] = 'password'
default['tomcat9']['adminroles'] = 'manager-gui,admin-gui'

• Now verify this cookbook

• Refer here for tomcat cookbook

• Exercise-1:

  • Install mongo db on centos7 using the documentation over here
  • Use community edition

• Next Steps:

  • Understanding Super Market
  • Understanding Custom Resources
  • Attributes, Roles and Environments