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Table of Contents
Configuration
This chapter describes the configuration of the Script-CLuster.
A SCript-CLuster is configured in three ascii files:
- sccl.conf
- packages.conf
- resources.conf
All files are located in
cd /etc/sccl/
sccl.conf
This file is source'd, so be careful when editing.
- sccl.conf
# Definition der Variablen fuers Script-Cluster # # Clustername CLUSTER=SCCL001 # # Physische Nodes im Cluster NODES="host001 host002" # HBNODE_EXT="hb1" # HBNODES="" # Pakete bei sccl_show_cluster sortieren SHOWSORTED=1 # Start und Stopp-Zeiten ans ULS liefern? ULS="1" # ULS="" ############################################################ # Verzeichnis zum Speichern der Cluster-Lockdateien LOCKDIR=/var/clusterlocks # Datei mit den Paketen des Clusters PACKAGES=/etc/sccl/packages.conf # Datei mit den Resourcen des Clusters RESOURCES=/etc/sccl/resources.conf # Directory mit den Start-Stop und Test-Scripten der Resourcen STARTSTOPDIR=/usr/local/sccl # Einstellungen fuer die Clusterkommunikation ueber unix2web U2WHOME=/usr/local/sccl/bin U2WPWDDAT=/usr/local/sccl/bin/u2w_pwd.dat U2WPORT=3579
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packages.conf
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The cluster packages are defined in the file that is referenced by the PACKAGES
parameter in the sccl.conf file. By default, /etc/sccl/packages.conf is used.
The packages.conf contains all definitions of all packages and the cluster nodes
(NODES in sccl.conf) on which they may be started.
- /etc/sccl/packages.conf
# packages.conf # # <package> { - | <stdnode> } [<altnode1> <altnode2> ...] # package1 host001 host002 package2 - host001 package3 - host002
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Das Clusterpaket <package> wird automatisch beim Start des Clusters auf seinem Standard-Clusterknoten <stdnode> gestartet und darf auf allen <altnodeX> laufen. Ein '-' anstelle von <stdnode> verhindert das automatische Starten des Clusterpakets beim Starten des Clusters oder des Clusterknotens.
resources.conf
The resources are configured in the file indicated by the (showing the default entry):
RESOURCES=/etc/sccl/resources.conf
entry in the /etc/sccl/sccl.conf.
The RESOURCES file contains all definitions of the resources belonging to the cluster packages.
It may also contain resource definitions belonging to sub-packages which are not listed
as packages in the PACKAGES file but only used in the RESOURCES file. Sub-packages are used to
bundle resources under one definition, which is useful if several packages make use of that sub-package.
Sub-packages cannot be started stand-alone and they do not appear as package in the output of the
sccl_show_cluster command and their status cannot be determined.
The resource definition must be in one line!
- /etc/sccl/resources.conf
# The general syntax of a resource definition: <package> <description_no_spaces> [MULTI] <resource> <resource> ... # example db My_Database IP:AUTO:10.1.2.4.255.255.255.240 PRG:/home/db/scripts/sccl_startstop
When the package ist “started”, all resources are activated or started in the sequence the resources are given in the resource definition line (from left to right/forward).
When the package ist “stopped”, all resources are deactivated or stopped in the sequence the resources are given in the resource definition line (from right to left/backwards).
| <package> | The name of a cluster package. |
| <description_no_spaces> | Long description of the package, may not contain spaces, use underscore instead. |
| MULTI | The cluster package may be simultaneously active on more than one cluster node. |
| <resource> | A specification of a resource (described later) |
Link to examples
The resources are described in Resources.
