Zabbix: lower CPU load alert level, and add STL trend item for testing

Signed-off-by: Greg Sutcliffe <fedora@emeraldreverie.org>

roles/zabbix/zabbix_server/files/templates/linux-by-zabbix-agent-active.yml

@@ -165,6 +165,24 @@ zabbix_export:
           tags:
             - tag: component
               value: cpu
+        - uuid: e3e5de475be14197b4f9338d09ecc828
+          name: 'Load average STL'
+          type: CALCULATED
+          key: system.cpu.load.stl
+          value_type: FLOAT
+          params: 'trendstl(/proxy34.fedoraproject.org/system.cpu.load[all,avg1],28d:now/d,1h,1d,3.5)'
+          description: 'Trend-based detection of CPU load anomalies. Expressed as a rate for the last hour.'
+          tags:
+            - tag: component
+              value: cpu
+          triggers:
+            - uuid: 64068fb9f7144be9a34ac45afe477097
+              expression: 'last(/Linux by Zabbix agent active/system.cpu.load.stl)>0'
+              name: 'Load Average STL anomaly detected'
+              priority: INFO
+              tags:
+                - tag: status
+                  value: test
         - uuid: c692df07acc44b4ea1f4f88cd4ee64eb
           name: 'Load average (1m avg)'
           type: ZABBIX_ACTIVE
@@ -2064,7 +2082,7 @@ zabbix_export:
       name: 'Linux: Load average is too high'
       event_name: 'Linux: Load average is too high (per CPU load over {$LOAD_AVG_PER_CPU.MAX.WARN} for {$LOAD_AVG_PER_CPU.MAX.TIME})'
       opdata: 'Load averages(1m 5m 15m): ({ITEM.LASTVALUE1} {ITEM.LASTVALUE3} {ITEM.LASTVALUE4}), # of CPUs: {ITEM.LASTVALUE2}'
-      priority: AVERAGE
+      priority: WARNING
       description: 'The load average per CPU is too high. The system may be slow to respond.'
       tags:
         - tag: scope