You can configure the Sun Cluster HA for Apache Tomcat data service to protect one or more Apache Tomcat instances. Each instance needs to be covered by one Apache Tomcat resource. The dependencies between the Apache Tomcat resource and other needed resources are described in Table 3, in Table 4, or in Table 5.
Table 3 Dependencies Failover
Component |
Description |
---|---|
Storage Resource |
This resource can be a SUNW.HAStoragePlus or a SUNW.HAStorage resource type. |
Apache Tomcat(Mandatory) |
-> SUNW.HAStoragePlus resource or SUNW.HAStorage resource The Storage resource manages the Apache Tomcat File System Mount points and ensures that Apache Tomcat is not started until they are mounted. |
Logical Host(Mandatory) |
The Apache Tomcat has an implicit dependency on the logical hosts of the resource group, because it is based on the generic data service. On behalf of this reason a logical Host needs to exist, but no explicit dependency is necessary. |
Because of the special requirements of a scalable configuration, you need no dependencies to storage or addresses, as long as every Apache Tomcat and its parameter file pfile is stored on the root file system. Otherwise follow Table 4.
Table 4 Dependencies Scalable
Component |
Description |
---|---|
Storage Resource |
This resource can be a SUNW.HAStorage or a SUNW.HAStoragePlus resource type. |
Apache Tomcat(Mandatory) |
-> Storage resource The Storage resource manages the Apache Tomcat File System Mount points and ensures that Apache Tomcat is not started until they are mounted. |
Shared address(Mandatory) |
The shared address resource resides in a separate resource group on which the scalable resource group depends. |
A multiple master configuration is running on more than one nodes like a scalable configuration, but without a shared address. Because of the special requirements of a multiple masters configuration, you need no dependencies to storage or addresses, as long as every Apache Tomcat and its parameter file pfile is stored on the root file system. Otherwise follow Table 5.
Table 5 Dependencies Multiple Masters
Component |
Description |
---|---|
Storage Resource |
This resource can be a SUNW.HAStorage or a SUNW.HAStoragePlus resource type. |
Apache Tomcat(Mandatory) |
-> Storage resource The Storage resource manages the Apache Tomcat File System Mount points and ensures that Apache Tomcat is not started until they are mounted. |
Shared address(Mandatory) |
The shared address resource resides in a separate resource group on which the scalable resource group depends. |
For more detailed information about Apache Tomcat, refer to the http://jakarta.apache.org web page.