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--
-- (C) 2019-21 - ntop.org
--
local redis_api = {}
-- ##############################################
local function getRedisStatus()
local redis = ntop.getCacheStatus()
local redis_info = redis["info"]
local res = {}
for _, k in pairs(redis_info:split("\r\n")) do
local k = k:split(":")
if k then
local v_k = k[1]
local v = tonumber(k[2]) or k[2]
res[v_k] = v
end
end
if redis["dbsize"] then
res["dbsize"] = redis["dbsize"]
end
return res
end
-- ##############################################
local function getHealth(redis_status)
local health = "green"
if ntop.isWindows() then
-- See Windows note in script.getStats()
return health
end
if redis_status["aof_enabled"] and redis_status["aof_enabled"] ~= 0 then
-- If here the use of Redis Append Only File (AOF) is enabled
-- so we should check for its errors
if redis_status["aof_last_bgrewrite_status"] ~= "ok" or redis_status["aof_last_write_status"] ~= "ok" then
health = "red"
end
end
if redis_status["rdb_last_bgsave_status"] ~= "ok" then
health = "red"
end
return health
end
-- ##############################################
-- NOTE: on Windows, some stats are missing from script.getRedisStatus():
-- - aof_last_bgrewrite_status
-- - aof_last_write_status
-- - rdb_last_bgsave_status
-- - dbsize
function redis_api.getStats()
local redis_status = getRedisStatus()
local res = {
-- used_memory_rss: Number of bytes that Redis allocated
-- as seen by the operating system (a.k.a resident set size).
-- This is the number reported by tools such as top(1) and ps(1)
memory = redis_status["used_memory_rss"],
-- The number of keys in the database
dbsize = redis_status["dbsize"],
-- Health
health = getHealth(redis_status)
}
return res
end
-- ###############################################
function redis_api.redisTimeseriesEnabled()
return(ntop.getPref("ntopng.prefs.system_probes_timeseries") ~= "0")
end
-- ###############################################
return redis_api
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