Node-RED UI 和儀表板技術 CPU 儀表板示例

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CPU 儀表板示例

此流程將監控並創建 CPU 使用率警報。在此流程中，您將了解如何安裝 CPU 使用率節點並創建一個 UI 儀表板，用於在 CPU 使用率超過 50% 時發送警報

此儀表板顯示 CPU 消息的儀表

如何構建此流程：

步驟 1. 將時間戳輸入連接到儀表板開關節點

拖動輸入節點並設置輸入屬性以發送時間戳。連接輸入節點以切換儀表板節點。為儀表板節點創建一個新選項卡和組。這樣，所有儀表板都可以在一個網頁中的漢堡菜單中找到。

在我的示例中，我調用選項卡 CPU 和組 CPU On/Off 來表示開關

將開關儀表板節點連接到開關功能節點，並在開關屬性中設置 msg.payload 為真以指示開關

Step 2. 安裝CPU使用率節點

轉到管理調色板並安裝 node-red-contrib-cpu

安裝後拖動 CPU 節點並將屬性設置為：

將 CPU 節點連接到調試節點以在調試面板上查看每個核心使用情況的消息。將 CPU 節點輸出連接到圖表儀表板，以繪製來自 CPU 的消息的折線圖。連接一個交換節點和一個通知節點，以在 CPU 內核的消息大於 50% 時發出警報

對於圖表節點，確保在 CPU 選項卡下創建一個新組

在我的例子中，我調用了 group CPU Utilization

在切換節點和警報節點之間使用模板節點為要警報的消息創建模板：

當核心 > 50 時，此模板會提醒哪個 CPU 核心處於多少百分比

第 3 步。為每個核心創建一個儀表

使用切換節點來分離來自所有 4 個內核的數據。創建單獨的儀表以映射每個核心的數據。

確保為儀表創建一個單獨的組。在我的例子中， Tab 仍然是 CPU 但組是 CPU guages 。最後，儀表板都在一個選項卡下 - CPU，並且有 3 個獨立的組 - CPU 打開和關閉、CPU 利用率和 CPU 儀表。

流程應該是這樣的：

部署所有更改並查看儀表板。當開關打開時，您應該在利用率圖表上看到 4 條線，以及來自每個儀表的不同值。

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