Skip Navigation Links
Exit Print View
| Oracle Solaris Cluster Data Services Developer's Guide Oracle Solaris Cluster 4.1

Search Scope:

- This Document
- Entire Library

## `xfnts_monitor_start` Method

The RGM calls the `Monitor_start` method on a node to start the fault monitor after a resource is started on the node. The `xfnts_monitor_start` method uses `scds_pmf_start()` to start the monitor daemon under the PMF.

Note - The first call in `xfnts_monitor_start` is to `scds_initialize()`, which performs some necessary housekeeping functions. `scds_initialize()` Function and the `scds_initialize`(3HA) man page contain more information.

The `xfnts_monitor_start` method calls the `mon_start` method, which is defined in the `xfnts.c` file, as follows:

    scds_syslog_debug(DBG_LEVEL_HIGH,
          "Calling Monitor_start method for resource <%s>.",
          scds_get_resource_name(scds_handle));

        /* Call scds_pmf_start and pass the name of the probe. */
       err = scds_pmf_start(scds_handle, SCDS_PMF_TYPE_MON,
           SCDS_PMF_SINGLE_INSTANCE, "xfnts_probe", 0);

       if (err != SCHA_ERR_NOERR) {
          scds_syslog(LOG_ERR,
              "Failed to start fault monitor.");
          return (1);
       }

       scds_syslog(LOG_INFO,
           "Started the fault monitor.");

       return (SCHA_ERR_NOERR); /* Successfully started Monitor */
    }

Note the following points about the call in `svc_mon_start()` to the `scds_pmf_start()` function:

- The `SCDS_PMF_TYPE_MON` argument identifies the program to start as a fault monitor. This method can also start a data service or some other type of application.

- The `SCDS_PMF_SINGLE_INSTANCE` argument identifies this as a single-instance resource.

- The `xfnts_probe` argument identifies the monitor daemon to start. The monitor daemon is assumed to be located in the same directory as the other callback programs.

- The final argument, `0`, specifies the child monitoring level. In this case, this value specifies that the PMF monitor the monitor daemon only.

Note - Before it exits, the `xfnts_monitor_start` method calls `scds_close()` to reclaim resources that were allocated by `scds_initialize()`. `scds_initialize()` Function and the `scds_close`(3HA) man page contain more information.

Copyright © 2000, 2012, Oracle and/or its affiliates. All rights reserved. Legal Notices |