snmp update (#1413)

- shorter interface column
- add configurable clampQuery to workaround traffic not properly calculated for some devices (like NX-OS).

Author: v-zhuravlev

snmp-observ-lib/config.libsonnet

@@ -19,6 +19,11 @@
   alertInterfaceDownSelector: 'ifAlias=~".*(?i:(uplink|internet|WAN)|ISP).*"',
   alertInterfaceDownSeverity: 'warning',
 
+  // Enable to workaround issue with counters on Cisco NX-OS overloading issue.
+  // This will clamp max interface traffic possible to 1000Gbps.
+  clampQueryEnabled: true,
+  clampSpeed: '100*10^9',  // 1000 GBps
+
   // cpuSelector for metricsSources with HOST-RESOURCE-MIB:
   cpuSelector: 'hrDeviceType="1.3.6.1.2.1.25.3.1.3"',
   // memorySelector for metricsSources with HOST-RESOURCE-MIB:

snmp-observ-lib/dashboards_out/snmp-fleet.json

@@ -14,7 +14,7 @@ function(this, level='interface')
     local bitsWrapper = ['(', ')*8'],
     local nonZeroWrapper = ['(', ')>0'],
     //set max limit to workaround for TB-PB/sec spikes when counters are overloaded too quickly on very busy interfaces.
-    local clampQuery = ['', '\n# set max limit to workaround for TB-PB/sec spikes when counters are overloaded too quickly on very busy interfaces.\n<100*10^9'],
+    local clampQuery = ['', '\n# set max limit to workaround for TB-PB/sec spikes when counters are overloaded too quickly on very busy interfaces.\n<' + this.clampSpeed],
     discoveryMetric: {
       generic: 'ifOperStatus',
       arista_sw: self.generic,
@@ -52,7 +52,7 @@ function(this, level='interface')
             generic:
               {
                 expr: 'ifHCInOctets{%(queriesSelector)s}',
-                exprWrappers: [bitsWrapper, clampQuery],
+                exprWrappers: [bitsWrapper] + if this.clampQueryEnabled then [clampQuery] else [],
               },
             arista_sw: self.generic,
             brocade_fc: self.generic,
@@ -86,7 +86,7 @@ function(this, level='interface')
             generic:
               {
                 expr: 'ifHCOutOctets{%(queriesSelector)s} ',
-                exprWrappers: [bitsWrapper, clampQuery],
+                exprWrappers: [bitsWrapper] + if this.clampQueryEnabled then [clampQuery] else [],
               },
             arista_sw: self.generic,
             brocade_fc: self.generic,
@@ -530,7 +530,7 @@ function(this, level='interface')
         },
         interfacesCount: self.ifOperStatus {
           name: 'Interfaces total',
-          nameShort: 'Interfaces count',
+          nameShort: 'Interfaces',
           description: |||
             Device interface count
           |||,