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Setup Sakai Cluster

The following information describes a Sakai Clustered TEST setup. Once the test is completed, this information will be updated with PRODUCTION relevant information.

Tasks and Issues
  • Create smartsite-test.ucdavis.edu dns entry, which points at load balancer
  • Use IP based balancing
    • Does this mean that a given client IP will always connect to the same node or is there some timeout?
      If there is a timeout, what is the TTL?
  • On a node, we need to find a common location for tomcat. Each node will retrieve a "ready to run" tomcat
    instance from AFS space and put it on local disk. Right now, tomcat is located in "/ucd/pkg/". Can we
    use that location? If not what is the location where the sakai user has "rw" access to?
  • What is the best way get a copy of the "ready to run" tomcat instance from AFS onto each node's local disk?
    • rsync, cp, ..?
  • We need to configure sakai.properties for each node. What tools do you recommend for doing this?
    • e.g. preprocessors such as M4 or some other configuration manager tool

Load Balancer

  • Name: ?
  • IP: ?
  • Test Name: smartsite-test.ucdavis.edu pointing at the load balancer
  • Setup:
    • Sticky session
    • WebDAV problem:
      • Can we also have IP based balancing?
      • Can balancer detect WebDAV requests and only forward them to Head Node?

Nodes

  • littlejohn (Head Node: For possible WebDAV workaround)
  • walton
  • braddock

System (Node) User

  • User name: sakai
  • Home: /ucd/opt/sakai

AFS staging volume

  • /afs/.ucdavis.edu/app/sakai/staging
    • /afs/.ucdavis.edu/app/sakai/staging/tomcat
    • /afs/.ucdavis.edu/app/sakai/staging/config
    • /afs/.ucdavis.edu/app/sakai/staging/src
  • The following soft links need to be created on each node 
    /var/sakai/content --> /afs/.ucdavis.edu/app/sakai/misc/content/smartsite
/var/sakai/archive --> /afs/.ucdavis.edu/app/sakai/misc/archive/smartsite
/var/sakai/ucd-data --> /afs/.ucdavis.edu/app/sakai/misc/ucd-data/smartsite
/var/melete --> /afs/.ucdavis.edu/app/sakai/misc/melete/smartsite/melete
/var/meleteDocs --> /afs/.ucdavis.edu/app/sakai/misc/melete/smartsite/meleteDocs
/var/uploads --> /afs/.ucdavis.edu/app/sakai/misc/melete/smartsite/uploads
/var/samigo --> /afs/.ucdavis.edu/app/sakai/misc/samigo/smartsite

Environment Setup

  • /ucd/pkg/jdk1.5.0_09
    • Create soft-link: /ucd/opt/java5 --> /ucd/pkg/jdk1.5.0_09
  • /ucd/pkg/1.4.2_12
    • Create soft-link: /ucd/opt/java --> /ucd/pkg/1.4.2_12
  • /ucd/pkg/maven-1.0.2
    • Create soft-link: /ucd/opt/maven --> /ucd/pkg/maven-1.0.2

Common Files

  • Tomcat
    • tomcat/conf/server.xml
    • tomcat/webapps/ROOT/index.html
  • sakai.properties
  • .bash_profile 
    PATH=/ucd/opt/java/bin:/ucd/opt/maven/bin:$PATH
MAVEN_HOME=/ucd/opt/maven
CATALINA_HOME=/ucd/opt/tomcat
JAVA_HOME=/ucd/opt/java
JAVA_OPTS=" -d64 -server -Xmx6144m -Xms6144m -XX:PermSize=128m -XX:MaxPermSize=512m -XX:+UseAdaptiveSizePolicy -XX:GCTimeRatio=49 -Dfile.encoding=utf-8 -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps"
export PATH MAVEN_HOME CATALINA_HOME JAVA_HOME JAVA_OPTS
  • Start and stop scripts
    • ~/bin/start-smartsite.sh 
      #!/bin/sh
JAVA_HOME=/ucd/opt/java5
CATALINA_HOME=/ucd/pkg/apache-tomcat-5.5.17
export JAVA_HOME CATALINA_HOME
/ucd/pkg/apache-tomcat-5.5.17/bin/startup.sh
    • ~/bin/stop-smartsite.sh 
      #!/bin/sh
JAVA_HOME=/ucd/opt/java5
CATALINA_HOME=/ucd/pkg/apache-tomcat-5.5.17
export JAVA_HOME CATALINA_HOME
/ucd/pkg/apache-tomcat-5.5.17/bin/shutdown.sh
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