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Oracle® Solaris Cluster Data Service for Apache Tomcat Guide

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Updated: August 2018
 
 

How to Register and Configure HA for Apache Tomcat as a Scalable Data Service

Before You Begin

This procedure assumes that you installed the data service packages during your initial Oracle Solaris Cluster installation.

If you did not install the HA for Apache Tomcat packages as part of your initial Oracle Solaris Cluster installation, go to Installing the HA for Apache Tomcat Package.

  1. Assume the root role or assume a role that provides solaris.cluster.modify and solaris.cluster.admin authorizations.
  2. Prepare the parameter file, which is required by the Oracle Solaris Cluster HA for Apache Tomcat. 
    # cd /opt/SUNWsctomcat/bin
# cp pfile desired-place
  3. Edit the parameter file pfile and follow the comments within that file.

    Repeat this Step for every Apache Tomcat instance and every node you need.

    For example:

    #!/usr/bin/ksh 
#
# Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
#

#ident  "@(#)pfile.ksh  1.6     01/03/12"

# Set the Apache Tomcat specific environment variables which the start, 
# stop and check functions will use 
#
# EnvScript     Script to set runtime environment for tomcat
# User          Apache Tomcat user name
# Basepath      Absolute pathname to Tomcat Home directory i.e. 5.x or
                6.x CATALINA_HOME
# Host          Hostname to test Apache Tomcat 
# Port          Port where Apache Tomcat is configured
# TestCmd       Apache Tomcat test command
# 
#
# Some versions of Apache Tomcat do not react on the probe algorithm with the
# http get command. Because of this we provide an alternative probe method
# which uses wget. If wget is not installed on your system you must install it
# manually and provide the WgetPath variable. If the WgetPath variable is not
# set, it defaults to /usr/sfw/bin/wget.
# You can use the wget algorithm for https probe as well which are not possible
# with the http get command.
#
# Use the variables TestUrl and WgetPath as a replacement for:
# Port, Host, TestCmd
# You can specify only one set of variables.
#
# TestUrl       Url where Tomcat serve a web site. This can be done either
#               by the http or https  protocol
#               Format: http://hostname:port/startpage
#               Example: http://localhost:8080/
#               You might want to include options here like:
#               "--no-cookies http://localhost:8080/"
#               The requirement here is that wget -O - ${TestUrl} produces
#               the output containing the ReturnString.
# WgetPath      Abolute path to wget, leaving this variable empty defaults to:
#               /usr/sfw/bin/wget
# Startwait     Sleeping $Startwait seconds after completion of the
#               start command
# ReturnString  This string must be present in the output of the http get
#               command or in the output of the wget command.
EnvScript=
User=
Basepath=
Host=
Port=8080
TestCmd="get /index.jsp"
TestUrl=
WgetPath=
ReturnString="CATALINA"
Startwait=20

    To use the alternative wget probe, assuming wget is available under /usr/sfw/bin/wget, set the following variables:

    EnvScript=/global/mnt1/tomtest/env.ksh
User=tomtest
Basepath=/global/mnt1/tomtest/jakarta-tomcat-6.0.28
Host=
Port=
TestCmd=
TestUrl="http://localhost:8080/"
WgetPath=
ReturnString="CATALINA"
Startwait=20

    The following example configures a standalone web server with the default start page index.jsp. The start page contains the string CATALINA.

    EnvScript=/tomcat/env.ksh
User=tomcat
Basepath=/tomcat/jakarta-tomcat-version
Host=localhost
Port=8080
TestCmd="get /index.jsp"
TestUrl=
WgetPath=
ReturnString="CATALINA"
Startwait=20

    Depending on the selected probe method, the Host parameter or the IP alias in the TestUrl parameter depends on the location of the pfile:

    • If the pfile is stored on the shared storage, you must use localhost.

    • If the pfile is stored on the local storage, it can be either localhost or the node's host name.

    Note -  Do not use the shared address here.
    Caution

    Caution  -  The parameter files must be available on every node that can host the Apache Tomcat data service. Store the parameter files on the local file system of every node or on the shared storage. The parameter files must be the same for every instance of Apache Tomcat on the various nodes.

  4. Create and register each required Apache Tomcat component.

    Repeat this step for every Apache Tomcat instance you need.

    # cd /opt/SUNWsctomcat/util
# cp sctomcat_config desired place
  5. Edit the sctomcat_config file and follow the comments within that file.

    Repeat this step for every Apache Tomcat instance you need.

    For example:

    #
# Copyright 2006, 2012, Oracle and/or its affiliates.  All rights reserved.
#

#ident   "@(#)sctomcat_config.ksh 1.2     01/03/12"

# This file will be sourced in by sctomcat_register and the parameters
# listed below will be used.
#
# These parameters can be customized in (key=value) form
#
#        RS - name of the resource for the application
#        RG - name of the resource group containing RS
#      PORT - name of the port number
#        LH - name of the LogicalHostname SC resource
#  SCALABLE - true for a scalable resource or false for a failover resource
#   NETWORK - false or true, false for multiple master configurations without
#             shared address, in this case SCALABLE will be ignored
#
#     PFILE - absolute path to the parameter file for the Tomcat resource
#    HAS_RS - name of the HAStoragePlus SC resource
#             (it can be a , separated list for the dependencies)
#
# The following variables need to be set only if the agent runs in a
# local zone
#      ZONE - the zone name where the Apache Tomcat should run in
#             Optional
#    ZONEBT - The resource name which controls the zone.
#             Optional
#   PROJECT - A project in the zone, that will be used for this service
#             specify it if you have an su - in the start stop or probe,
#             or to define the smf credentials. If the variable is not set,
#             it will be translated as :default for the smf manifest
#             Optional

RS=
RG=
PORT=
LH=
NETWORK=false
SCALABLE=false
PFILE=
HAS_RS=

# local zone specific options

ZONE=
ZONE_BT=
PROJECT=

    The following is an example for Apache Tomcat.

    RS=tomcat-res
RG=tomcat-rg
PORT=8080
LH=tomcat-lh
SCALABLE=true
NETWORK=true
PFILE=/tomcat/pfile
HAS_RS=Apache-Tomcat-hasp-resource

    Configure the LH parameter as the name of the shared address. Set the HAS_RS parameter only when another file system (cluster file system or highly available local file system) is used and the appropriate Apache-Tomcat-hasp-resource is created.

  6. After editing sctomcat_config, register the resource. 
    # ksh ./sctomcat_register desired place/sctomcat_config

    Repeat this step for every Apache Tomcat instance you need.

  7. Enable each Apache Tomcat resource.

    Repeat this step for each Apache Tomcat resource created.

    # clresource status
# clresource enable Apache-Tomcat-resource
Copyright © 2010, 2018, Oracle and/or its affiliates.  
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