====== HANA nodes status ======
  HANA nodes status are visible in the system and this monitor will watch for them.
  Send an alarm when a node is in an error state.
===== Configuration hints =====
  * Create a rule in the surveillance table to configure how nodes monitoring must be done.
==== Mandatory ====
  * If active, the node specified in the node filter must be registered and with an OK status.
==== Node ====
  * Define a specific node name if you want to customize the monitoring for a given node.
  * You can use * of any regular expression otherwise.
===== Surveillance table =====
^Parameter^Description^
^Active|If checked, the rule is enabled and will be processed|
^Mandatory|If checked, the specified node will generate an alarm is not in OK status|
^Node|The HANA node filter. You can use * to cover all discovered nodes or name a specific node|
^Warning severity|Defines the severity to use when a node is in WARNING state|
^Error severity|Defines the severity to use when a node is in ERROR state|
^Auto clear|If set, the alarm generated when the service goes down will be cleared when the service comes back again|
^Alarm tag|You can define some text to use as a prefix of the alarm message generated by the current rule|
^Alarm|If enabled, it will send alarm. You can use this option to enable or disable alarm sending|
^Metric|If enabled, it will send metrics. You can use this option to enable or disable metric sending|
===== Generated metrics =====
^metricId^metricUnit^metricTarget^metricDescription^
|HANA_NODE_AVAILABILITY|status|NODE|Sends TRUE if the node is in a OK state, FALSE instead|