【运维发布】容量月报：资源使用的月度报告

-- 容量月报：月度汇总
local player = class(actor)
local RESOURCES = {"cpu", "mem", "disk", "bandwidth"}
local WARN_LINE = 70
local function monthlySummary(player, month)
    local report = {}
    for _, res in ipairs(RESOURCES) do
        local cur = tonumber(getsysvar("Res_" .. res .. "_" .. month) or 0)
        local prev = tonumber(getsysvar("Res_" .. res .. "_" .. (tonumber(month) - 1)) or 0)
        local trend = prev > 0 and (cur - prev) / prev * 100 or 0
        local alert = cur >= WARN_LINE
        report[#report + 1] = res .. "：" .. cur .. "%（环比 " ..
            string.format("%+.1f", trend) .. "%）" .. (alert and " ⚠" or "")
        if alert and trend > 0 then
            setsysvarex("ScaleCandidate_" .. res, 1, true)
        end
    end
    sendmsg(player, 1, 0, "=== 容量月报 ===\n" .. table.concat(report, "\n"))
end

-- 扩容建议：推算与评估
local player = class(actor)
local function scaleRecommendation(player, res, curUsage, monthlyGrowth)
    if monthlyGrowth <= 0 then return end
    local projected = curUsage * math.pow(1 + monthlyGrowth / 100, 3)
    local suggested = math.ceil(projected / 70 * 100)
    sendmsg(player, 1, 0, res .. " 三月后预估 " ..
        string.format("%.0f", projected) .. "%，建议扩容至 " .. suggested .. "% 容量。")
end