|
|
Sun Cluster switching issue
|
|
rt_properties(5) Sun Cluster Miscellaneous rt_properties(5) NAME
rt_properties - resource-type properties DESCRIPTION
The following information describes the resource-type properties that are defined by Sun Cluster software. These descriptions have been developed for data service developers. For information about a particular data service, see the man page for that data service. Resource-Type Property Values Required The property requires an explicit value in the Resource Type Registration (RTR) file. Otherwise, the object to which the property belongs cannot be created. A blank or the empty string is not allowed as a value. Conditional To exist, the property must be declared in the RTR file. Otherwise, the RGM does not create the property, and the property is not available to administrative utilities. A blank or the empty string is allowed. If the prop- erty is declared in the RTR file but no value is specified, the RGM supplies a default value. Conditional/Explicit To exist, the property must be declared in the RTR file with an explicit value. Otherwise, the RGM does not create the property and the property is not available to administrative utilities. A blank or the empty string is not allowed. Optional The property can be declared in the RTR file. If the property is not declared in the RTR file, the RGM creates it and supplies a default value. If the property is declared in the RTR file but no value is specified, the RGM supplies the same default value as if the property were not declared in the RTR file. Query-only The property cannot be set directly by an administrative utility. The property is not set in the RTR file. The value of the property is provided for information only. Note - Resource-type properties cannot be updated by administrative utilities with the exception of Installed_nodes and RT_system. Installed_nodes cannot be declared in the RTR file and can only be set by the cluster administrator. RT_system can be assigned an initial value in the RTR file, and can also be set by the cluster administrator. Resource-Type Properties and Descriptions A resource type is defined by a resource-type registration file that specifies standard and extension property values for the resource type. Note - resource-type property names, such as API_version and Boot, are not case sensitive. You can use any combination of uppercase and lower- case letters when you specify property names. API_version (integer) The version of the resource management API that is used by this resource-type implementation. The following information summarizes the maximum API_version that is supported by each release of Sun Cluster software. Before and up to 3.1 2 3.1 10/03 3 3.1 4/04 4 3.1 9/04 5 3.1 8/05 6 3.2 7 3.2 12/07 8 Declaring a value for API_version that is greater than 2 in the RTR file prevents that resource type from being installed on a version of Sun Cluster software that supports a lower maximum version. For example, if you declare API_version=7 for a resource type, that resource type cannot be installed on any version of Sun Cluster software that was released before the Sun Cluster 3.2 release. Category Optional Default 2 Tunable Never Boot (string) An optional callback method: the path to the program that the RGM invokes on a node or a zone when the following conditions occur: o The node or zone joins or rejoins the cluster. o The resource group that contains the resource of this type is managed. This method is expected to initialize resources of this type as the Init method does. Category Conditional/Explicit Default None Tunable Never Failover (boolean) If you set this property to TRUE, resources of this type cannot be configured in any group that can be online on multiple nodes or zones at the same time. You use this resource-type property in combination with the Scalable resource property, as follows: Failover Scalable Description -------------------------------------------------------------- TRUE TRUE Do not specify this illogi- cal combination. TRUE FALSE Specify this combination for a failover service. FALSE TRUE Specify this combination for a scalable service that uses a SharedAddress resource for network load balancing.The Sun Cluster Concepts Guide for Solaris OS describes SharedAddress in more detail.You can con- figure a scalable resource group to run in a non- global zone. But, do not configure a scalable resource to run in multiple non-global zones on the same node. FALSE FALSE Use this combination to select a multi-master ser- vice that does not use net- work load balancing.You can use a scalable service of this type in zones. The description for Scalable in r_properties(5) and Chapter 3, Key Concepts for System Administrators and Application Developers, in Sun Cluster Concepts Guide for Solaris OS contain additional information. Category Optional Default FALSE Tunable Never Fini (string) An optional callback method: the path to the program that the RGM invokes when a resource of this type is removed from RGM management. Category Conditional/Explicit Default No default Tunable Never Global_zone (boolean) If you set this property to TRUE for a resource type, its methods execute in the global zone under all circumstances. If you set this property to TRUE, even if the resource group is running in a non-global zone, the method executes in the global zone. Set this prop- erty to TRUE only for services that can be managed only from the global zone, such as network addresses and file systems. Caution - Do not register a resource type for which the Global_zone property is set to TRUE unless the resource type comes from a known and trusted source. Resource types for which this property is set to TRUE circumvent zone isolation and present a risk. The methods of a resource that is configured to start in a non-global zone and whose Global_zone property is set to TRUE are always run in the global zone. Such a resource, when configured in a non-global zone, does not benefit from the CPU shares and dedicated processor set configuration. This resource does not benefit even if you set the RG_slm_type property to AUTOMATED. Sun Cluster software treats such a resource as though it is located in a resource group whose RG_slm_type property is set to MANUAL. Because methods for resource types for which the Global_zone property is set to TRUE run in the global zone, the RGM does not immedi- ately consider these resource types offline when a non-global zone dies. In fact, the RGM runs methods such as Monitor_stop, Stop, and Postnet_stop on these resource types, which include LogicalHostname, SharedAddress, and HAStoragePlus. However, the RGM considers the resources for which the Global_zone property is set to FALSE to be offline when a non-global zone dies. The RGM cannot run stopping methods on such resources because the methods would have to run in the non-global zone. Category Optional Default FALSE Tunable Never Init (string) An optional callback method: the path to the program that the RGM invokes when a resource of this type becomes managed by the RGM. Category Conditional/Explicit Default No default Tunable Never Init_nodes (enum) Indicates the nodes or zones on which the RGM is to call the Init, Fini, Boot, and Validate methods. You can set this property to RG_primaries (just the nodes or zones that can master the resource) or RT_installed_nodes (all nodes or zones on which the resource type is installed). Category Optional Default RG_primaries Tunable Never Installed_nodes (string_array) A list of the names of nodes or zones on which the resource type is allowed to run. The RGM automatically creates this property. The cluster administrator can set the value. You cannot declare this property in the RTR file. Category Can be configured by the cluster administrator Default All cluster nodes or zones Tunable Any time Is_logical_hostname (boolean) TRUE indicates that this resource type is some version of the LogicalHostname resource type that manages failover IP addresses. Category Query-only Default No default Tunable Never Is_shared_address (boolean) TRUE indicates that this resource type is some version of the SharedAddress resource type that manages shared IP (Internet Protocol) addresses. Category Query-only Default No default Tunable Never Monitor_check (string) An optional callback method: the path to the program that the RGM invokes before doing a monitor-requested failover of a resource of this type. If the monitor-check program exits with nonzero on a node or zone, any attempt to fail over to that node or zone is pre- vented. Category Conditional/Explicit Default No default Tunable Never Monitor_start (string) An optional callback method: the path to the program that the RGM invokes to start a fault monitor for a resource of this type. Category Conditional/Explicit Default No default Tunable Never Monitor_stop (string) A callback method that is required if Monitor_start is set: the path to the program that the RGM invokes to stop a fault monitor for a resource of this type. Category Conditional/Explicit Default No default Tunable Never Pkglist (string_array) An optional list of packages that are included in the resource-type installation. Category Conditional/Explicit Default No default Tunable Never Postnet_stop (string) An optional callback method: the path to the program that the RGM invokes after calling the Stop method of any network-address resources on which a resource of this type depends. This method is expected to perform Stop actions that must be performed after net- work interfaces are configured down. Category Conditional/Explicit Default No default Tunable Never Prenet_start (string) An optional callback method: the path to the program that the RGM invokes before calling the Start method of any network-address resources on which a resource of this type depends. This method is expected to perform Start actions that must be performed before net- work interfaces are configured up. Category Conditional/Explicit Default No default Tunable Never Proxy (boolean) Indicates whether a resource of this type is a proxy resource. A proxy resource is a Sun Cluster resource that imports the state of a resource from another cluster framework such as Oracle Cluster Ready Services (CRS). Oracle CRS, which is now known as Oracle clusterware CRS, is a platform-independent set of system services for cluster environments. A proxy resource type uses the Prenet_start method to start a daemon that monitors the state of the external (proxied) resource. The Postnet_stop method stops the monitoring daemon. The monitoring daemon issues the scha_control command with the CHANGE_STATE_ONLINE or the CHANGE_STATE_OFFLINE tag to set the proxy resource's state to Online or to Offline, respectively. The scha_control() function similarly uses the SCHA_CHANGE_STATE_ONLINE and SCHA_CHANGE_STATE_OFFLINE tags. If you set this property to TRUE, the resource is a proxy resource. Category Optional Default FALSE Tunable Never Resource_list (string_array) The list of all resources of the resource type. The administrator does not set this property directly. Rather, the RGM updates this property when the administrator adds or removes a resource of this type to or from any resource group. Category Query-only Default Empty list Tunable Never Resource_type (string) The name of the resource type. To view the names of the currently registered resource types, type: clresourcetype list Starting with the Sun Cluster 3.1 release, a resource-type name includes the version, which is mandatory: vendor_id.resource_type:version The three components of the resource-type name are properties that are specified in the RTR file as Vendor_id, Resource_type, and RT_version. The clresourcetype command inserts the period (.) and colon (:) delimiters. The RT_version suffix of the resource-type name is the same value as the RT_version property. To ensure that the Vendor_id is unique, the recommended approach is to use the stock sym- bol for the company creating the resource type. Resource-type names that were created before the Sun Cluster 3.1 release continue to use this syntax: vendor_id.resource_type Category Required Default Empty string Tunable Never RT_basedir (string) The directory path that is used to complete relative paths for callback methods. This path is expected to be set to the installation location for the resource-type packages. The path must be a complete path, that is, the path must start with a forward slash (/). This property is not required if all the method path names are absolute. Category Required, unless all method path names are absolute Default No default Tunable Never RT_description (string) A brief description of the resource type. Category Conditional Default Empty string Tunable Never RT_system (boolean) If you set this property to TRUE for a resource type, you cannot delete the resource type (clresourcetype unregister resource_type_name). This property is intended to help prevent accidental deletion of resource types, such as LogicalHostname, that are used to support the cluster infrastructure. However, you can apply the RT_system property to any resource type. To delete a resource type whose RT_system property is set to TRUE, you must first set the property to FALSE. Use care when you delete a resource type whose resources support cluster services. Category Optional Default FALSE Tunable Any time RT_version (string) Starting with the Sun Cluster 3.1 release, a mandatory version string that identifies this resource-type implementation. This property was optional in Sun Cluster 3.0 software. The RT_version is the suffix component of the full resource-type name. Category Conditional/Explicit or Required Default No default Tunable Never Single_instance (boolean) If you set this property to TRUE, the RGM allows only one resource of this type to exist in the cluster. Category Optional Default FALSE Tunable Never Start (string) A callback method: the path to the program that the RGM invokes to start a resource of this type. Category Required, unless the RTR file declares a Prenet_start method Default No default Tunable Never Stop (string) A callback method: the path to the program that the RGM invokes to stop a resource of this type. Category Required, unless the RTR file declares a Postnet_stop method Default No default Tunable Never Update (string) An optional callback method: the path to the program that the RGM invokes when properties of a running resource of this type are changed. Category Conditional/Explicit Default No default Tunable Never Validate (string) An optional callback method: the path to the program that the RGM invokes to check values for properties of resources of this type. Category Conditional/Explicit Default No default Tunable Never Vendor_ID (string) See the Resource_type property. Category Conditional Default No default Tunable Never SEE ALSO
clresource(1CL), clresourcegroup(1CL), clresourcetype(1CL), rt_reg(4), SUNW.HAStoragePlus(5), property_attributes(5), r_properties(5), rg_properties(5), scha_control(1HA), scha_control(3HA). Sun Cluster Concepts Guide for Solaris OS, Sun Cluster Data Services Developer's Guide for Solaris OS, Sun Cluster Data Services Planning and Administration Guide for Solaris OS Sun Cluster 3.2 14 Sep 2007 rt_properties(5)
