mirror of
https://github.com/ntop/ntopng.git
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136 lines
4.3 KiB
Lua
136 lines
4.3 KiB
Lua
--
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-- (C) 2013-24 - ntop.org
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--
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--
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-- This script implements the backup of ntopng configurations
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--
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local dirs = ntop.getDirs()
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package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
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package.path = dirs.installdir .. "/scripts/lua/modules/import_export/?.lua;" .. package.path
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-- ##############################################
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require "lua_utils"
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local all_import_export = require "all_import_export"
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local import_export_rest_utils = require "import_export_rest_utils"
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local rest_utils = require("rest_utils")
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local json = require("dkjson")
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-- ##############################################
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local action = nil -- _GET["action"]
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local backup_hash_key = "ntopng.cache.config_save_backup"
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local backup_config = {}
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local debugger = false
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-- ##############################################
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local function remove_last(epoch_keys)
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for key, _ in pairsByKeys(epoch_keys or {}, asc) do
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if debugger then
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traceError(TRACE_DEBUG, TRACE_CONSOLE, "Removing the key: " .. key)
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end
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ntop.delHashCache(backup_hash_key, key)
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break -- take the first one
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end
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end
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-- ##############################################
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-- @brief Save configurations backup.
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function backup_config.save_backup()
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local instances = {}
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local to_ignore = { last_poll_time = true, last_poll_duration = true, num_interfaces_with_errors = true, delta_interfaces_with_errors = true }
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-- Retrieve the configuration
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instances["all"] = all_import_export:create()
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local backup = import_export_rest_utils.export(instances, false, true)
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if debugger then
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traceError(TRACE_DEBUG, TRACE_CONSOLE, "START BACKUP SAVING")
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end
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-- Get all the keys
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local key = tostring(os.time())
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local saved_backups_keys = ntop.getHashKeysCache(backup_hash_key) or {}
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local num_saved_backups = table.len(saved_backups_keys) or 0
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-- Check the currently saved backups
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if (num_saved_backups >= 7) then
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remove_last(saved_backups_keys)
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end
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if (saved_backups_keys and num_saved_backups >= 1) then
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-- Save the configuration on redis only if the configuration has some changes
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-- between the last saved configuration, using the pairsByKeys just to order the
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-- keys from the last added to the first one.
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for item, _ in pairsByKeys(saved_backups_keys, rev) do
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local last_config = json.decode(ntop.getHashCache(backup_hash_key, item)) or {}
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-- Check if the last configuration is equal to the current one
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if (not table.is_equal(last_config, backup, to_ignore)) then
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-- tprint("CONFIGURATION CHANGED ****")
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if debugger then
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traceError(TRACE_DEBUG, TRACE_CONSOLE, "Saving Backup: " .. backup .. "\nUsing Redis key: " .. key)
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end
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ntop.setHashCache(backup_hash_key, key, json.encode(backup))
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else
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-- tprint("CONFIGURATION [ " .. item .."]= ****")
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end
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break -- take the first one
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end
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else
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-- Save the backup
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if debugger then
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traceError(TRACE_DEBUG, TRACE_CONSOLE, "Saving Backup: " .. backup .. "\nUsing Redis key: " .. key)
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end
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ntop.setHashCache(backup_hash_key, key, json.encode(backup))
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end
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end
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-- ##############################################
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-- @brief List all configurations backup.
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function backup_config.list_backup(user, order)
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local saved_backups_keys = ntop.getHashKeysCache(backup_hash_key) or {}
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local epoch_list = {}
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local date_format = ntop.getPref("ntopng.user."..user..".date_format")
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for epoch, _ in pairsByKeys(saved_backups_keys, rev) do
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epoch_list[#epoch_list + 1] = {
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epoch = epoch,
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date_format = date_format
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}
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end
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if order == "desc" then
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table.sort(epoch_list, function(x,y) return x.epoch > y.epoch end)
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else
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table.sort(epoch_list, function(x,y) return x.epoch < y.epoch end)
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end
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return epoch_list
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end
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-- ##############################################
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-- @brief Export configuration backup.
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function backup_config.export_backup(epoch)
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if (epoch == nil or isEmptyString(epoch)) then
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return false, {}
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end
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local backup_to_restore = json.decode(ntop.getHashCache(backup_hash_key, epoch)) or {}
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return true, json.encode(backup_to_restore)
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end
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-- ##############################################
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return backup_config
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