Added snmp exporter polling (#9891)

Author: MatteoBiscosi

scripts/locales/en.lua

@@ -7935,6 +7935,8 @@ local lang = {
     ["toggle_snmp_excluded_from_usage_title"] = "Exclude New Interfaces from SNMP  Usage",
     ["toggle_snmp_polling_description"] = "Toggle the polling of SNMP devices.",
     ["toggle_snmp_polling_title"] = "SNMP Polling",
+    ["snmp_devices_exporters_rrds_resolution_title"] = "Flow Exporters Polled by SNMP",
+    ["snmp_devices_exporters_rrds_resolution_description"] = "Change the timeseries resolution of the SNMP devices that are also Exporters (have a faster pool, to have more accurate data or standard pool). Consider that in case of many Exporters, higher resolution could cause performance problems.",
     ["toggle_snmp_port_admin_status_description"] = "Toggle interface admin status. Toggle is immediate but actual status shown is refreshed during the next poll.",
     ["toggle_snmp_port_admin_status_title"] = "Interface Admin Status",
     ["toggle_snmp_port_qos_mib_polling_description"] = "Toggle the QoS MIB Polling of a device interface.",

scripts/lua/admin/prefs.lua

@@ -2007,9 +2007,18 @@ if auth.has_capability(auth.capabilities.preferences) then
             field = "toggle_snmp_rrds",
             default = "0",
             pref = "snmp_devices_rrd_creation",
-            disabled = disabled
+            disabled = disabled,
+            to_switch = { "row_snmp_devices_exporters_rrd" }
         })
 
+        local resolutions_labels = { i18n('disabled'), "1m", "5m" }
+        local resolutions_values = { "0", "60", "300" }
+
+        multipleTableButtonPrefs(subpage_active.entries["snmp_devices_exporters_rrds_resolution"].title,
+            subpage_active.entries["snmp_devices_exporters_rrds_resolution"].description, resolutions_labels,
+            resolutions_values, "60", "primary", "snmp_devices_exporters_rrd", "ntopng.prefs.snmp_devices_exporters_rrd",
+            nil, nil, nil, nil, areSnmpTimeseriesEnabled())
+
         prefsToggleButton(subpage_active, {
             field = "toggle_snmp_polling",
             default = "0",

scripts/lua/modules/check_redis_prefs.lua

@@ -144,6 +144,19 @@ end
 
 -- ###########################################
 
+function areSNMPExporterTimeseriesDisabled()
+    return (ntop.getPref("ntopng.prefs.snmp_devices_exporters_rrd") == "0")
+end
+
+-- ###########################################
+
+function highSNMPExporterTimeseriesResolution()
+    local resolution = ntop.getPref("ntopng.prefs.snmp_devices_exporters_rrd")
+    return (resolution == "60" or isEmptyString(resolution))
+end
+
+-- ###########################################
+
 function highExporterTimeseriesResolution()
     return (ntop.getPref("ntopng.prefs.exporters_ts_resolution") == "60")
 end

scripts/lua/modules/http_lint.lua

@@ -2542,6 +2542,7 @@ local known_parameters = {
     ["toggle_date_type"] = validateSingleWord,
 
     ["exporters_ts_resolution"] = validateNumber,
+    ["snmp_devices_exporters_rrd"] = validateNumber,
 
     -- Other
     ["send_test_email"] = validateEmpty,

scripts/lua/modules/prefs_menu.lua

@@ -548,6 +548,10 @@ local menu_subpages = {{
             title = i18n("prefs.toggle_snmp_rrds_title"),
             description = i18n("prefs.toggle_snmp_rrds_description")
         },
+        snmp_devices_exporters_rrds_resolution = {
+            title = i18n("prefs.snmp_devices_exporters_rrds_resolution_title"),
+            description = i18n("prefs.snmp_devices_exporters_rrds_resolution_description")
+        },
         toggle_snmp_polling = {
             title = i18n("prefs.toggle_snmp_polling_title"),
             description = i18n("prefs.toggle_snmp_polling_description")

scripts/lua/modules/timeseries_info.lua

@@ -3231,6 +3231,9 @@ end
 -- #################################
 
 local function choose_traffic_serie(tags, timeseries)
+   if areSNMPExporterTimeseriesDisabled() then
+      return timeseries
+   end
    local tot = 0
    local tot_serie = ts_utils.queryTotal("snmp_if:traffic_min", tags.epoch_begin, tags.epoch_end, tags)
    for _, value in pairs(tot_serie or {}) do