Add Status REST API (#8159).

scripts/lua/rest/v2/get/system/status.lua

@@ -0,0 +1,53 @@
+--
+-- (C) 2019-24 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local rest_utils = require "rest_utils"
+local format_utils = require("format_utils")
+local cpu_utils = require("cpu_utils")
+
+-- retrieve license info
+local info = ntop.getInfo()
+
+-- format license info
+local license_info = {
+  version = split(getNtopngRelease(info, true)," |")[1],
+  system_id = info["pro.systemid"],
+  license = info["pro.license_encoded"],
+  status = info["pro.license_type"],
+}
+
+-- retrieve resources_used
+local system_host_stats = cpu_utils.systemHostStats()
+local ram_used = system_host_stats["mem_used"] 
+
+-- format resources_used
+local resources_used = {
+  system = {
+    cpu = {
+      load = round(system_host_stats["cpu_load"], 2),
+      states = {
+        iowait_percentage = formatValue(system_host_stats["cpu_states"]["iowait"])
+        active_percentage = round(formatValue(system_host_stats["cpu_states"]["user"] + system_host_stats["cpu_states"]["system"] + system_host_stats["cpu_states"]["nice"] + system_host_stats["cpu_states"]["irq"] + system_host_stats["cpu_states"]["softirq"] + system_host_stats["cpu_states"]["guest"] + system_host_stats["cpu_states"]["guest_nice"]), 2),
+        idle_percentage = round(formatValue(system_host_stats["cpu_states"]["idle"] + system_host_stats["cpu_states"]["steal"]), 2),
+      }
+    },
+    ram = {
+      percentage_used = round((ram_used / system_host_stats["mem_total"]) * 100 * 100) / 100,
+      available_bytes = (system_host_stats["mem_total"] - ram_used) * 1024,
+      total_bytes = system_host_stats["mem_total"] * 1024,
+    },
+  },
+  ntopng = {
+    ram = {
+      bytes_used = system_host_stats["mem_ntopng_resident"] * 1024,
+    },
+  },
+}
+
+-- return REST response
+rest_utils.answer(rest_utils.consts.success.ok, { license_info = license_info, resources_used = resources_used})