前言
最近甲骨文针对永久免费的资源出了个新的政策,具体看这里:
https://docs.oracle.com/en-us/iaas/Content/FreeTier/freetier_topic-Always_Free_Resources.htm
里面提到了如果计算实例长期空闲,可能会被回收:
- Reclamation of Idle Compute Instances
- Idle Always Free compute instances may be reclaimed by Oracle. Oracle will deem virtual machine and bare
- metal compute instances as idle if, during a 7-day period, the following are true:
- CPU utilization for the 95th percentile is less than 10%
- Network utilization is less than 10%
- Memory utilization is less than 10% (applies to A1 shapes only)
简单点说就是7
天内,如果机器的cpu、内存、带宽使用率低于10%
就视为是空闲的计算实例,可能会被回收。。。
我有2台免费的arm机器,确实一直放那里没怎么用,但是里面也跑了几个服务,只是这些服务都用不了多少资源,没办法为了机器不被回收,只能想办法把cpu、内存使用率再往上抬一抬。
这里介绍个小工具:lookbusy
,这是一个linux系统负载生成器,可以根据你的配置来占用cpu、内存等资源。
以下是debian11编译安装lookbusy的方法:
apt -y update
apt -y install curl build-essential
curl -L http://www.devin.com/lookbusy/download/lookbusy-1.4.tar.gz -o lookbusy-1.4.tar.gz
tar -xzvf lookbusy-1.4.tar.gz
cd lookbusy-1.4/
./configure
make
make install
新建systemd服务:
systemctl edit --full --force lookbusy.service
写入如下配置:
[Unit]
Description=lookbusy service
[Service]
Type=simple
ExecStart=/usr/local/bin/lookbusy -c 20 -m 5120MB
Restart=always
RestartSec=10
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
参数-c指cpu使用率,-m指内存使用率。可以根据自己的实例配置来适当配置。
启动并设置lookbusy开机自启:
systemctl enable --now lookbusy.service
检查机器cpu、内存、负载情况,确定超过甲骨文规定的10%即可:
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