# 資源限制

## Resource limit

### 資源種類

* CPU
* Memory<br>

### 基本單位

* 1 個 cpu (Hyperthread)
  * 100m(millicpu) = 0.1 unit of cpu
* 1 bytes&#x20;
  * 500 Mi&#x20;
  * 10 Gi

### 限制型態以 container 為單位作限制

* spec.containers\[].resources.limits.cpu
* spec.containers\[].resources.limits.memory
* spec.containers\[].resources.requests.cpu
* spec.containers\[].resources.requests.memory

#### limits: 限制最高, requests: 保證最低

### 規則

`0 <= request <= Node Allocatable`

&#x20;`request` <= `limit` <= Infinity

## 在 Rancher 上設定

任一個 Application 底下，找到 Security & Host Config 下半部有 CPU, Memory Reservation 可以限制使用資源

![](/files/-LJv_7i-Gs_t-CLUIJDx)


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