Oracle Cloud Cleaning Up Idle Compute Instances & How to Keep it

从 2022 年 11 月 24 日开始，您闲置的 Always Free 计算实例可能会停止。 详细了解此过程以及如何重启您的实例。 您还可以随时升级您的帐户以避免中断。

仅限未付费的免费套餐帐户。Idle Always未付费免费套餐帐户的免费资源可以随时回收，恕不另行通知。回收包括停止或终止等操作。

Idle Compute Instances threshold was 10% at the beginning of 2023:

NeverIdle Github Project Method – Optional

1 install dependencies

You might need to install wget and screen those two applications:

Based on your OS ,  this is command

• yum install -y wget screen
• apt install -y wget screen

2 Download script

# AMD Server

• wget https://github.com/layou233/NeverIdle/releases/download/0.1/NeverIdle-linux-amd64 -O NeverIdle

# ARM Server

• wget https://github.com/layou233/NeverIdle/releases/download/0.1/NeverIdle-linux-arm64 -O NeverIdle

3 Change file permission

• chmod 777 NeverIdle

4 Run Command

• screen -R baohuo

./NeverIdle -c 2h1m2s -m 2 -n 4h

-c : for cpu consumption. every 2 hour 1 minute 2 second (format is 2h1m2s), it will waste CPU once

-m : enable memory occupation. 2 means 2GB

-n : execute once to waste network for Ookla Speed Test. It will show the output on your screen.

5 Detaching and Reattaching screen session

To detach from screen and leave the window running in the background, use the keystroke:

Detach: Ctrl + a + d

Reattach: screen -r

Other screen commands:

• Ctrl + a and c – Open a new screen window.
• Ctrl + a and “ – List all open windows.
• Ctrl + a and 0 – Switch to window 0 (or any other numbered window).
• Ctrl + a and A – Rename the current window.
• Ctrl + a and S – Split the screen horizontally, with the current window on top.
• Ctrl + a and | – Split the screen vertically, with the current window on the left.
• Ctrl + a and tab – Switch focus between areas of the split screen.
• Ctrl + a and Ctrl + a – Switch between current and previous windows.
• Ctrl + a and n – Switch to the next window.
• Ctrl + a and p – Switch to the previous window.
• Ctrl + a and Q – Quit all other windows except the current one..
• Ctrl + a and X – Lock the current window.
• Ctrl + a and H – Create a running log of the session.
• Ctrl + a and M – Monitor a window for output (a notification pops up when that window has activity).
• Ctrl + a and _ – Watch a window for absence of output (such as when a file finishes downloading or a compiler finishes).

Issue with Neveridle project

 	
.....(omitted)
[CPU] Successfully wasted on 2023-02-11 03:27:30.720672124 +0000 UTC m=+472956.791431450
[CPU] Successfully wasted on 2023-02-11 03:58:32.804538037 +0000 UTC m=+474818.875297404
[CPU] Successfully wasted on 2023-02-11 04:29:34.814400539 +0000 UTC m=+476680.885159905
[CPU] Successfully wasted on 2023-02-11 05:00:36.893766288 +0000 UTC m=+478542.964525624
panic: chacha20: counter overflow

goroutine 1030 [running]:
golang.org/x/crypto/chacha20.(*Cipher).XORKeyStream(0xc0000c6160?, {0xc00010e000?, 0x0?, 0x0?}, {0xc00010e000?, 0x0?, 0x0?})
        golang.org/x/[email protected]/chacha20/chacha_generic.go:218 +0x408
main.WasteCPU.func1()
        NeverIdle/cpu.go:30 +0x48
created by main.WasteCPU
        NeverIdle/cpu.go:28 +0x1e5
root@ubuntu1:~# 

Other Methods to Keep Your Idle Resources

Shell Scripts

 	
curl https://keeporacle.pages.dev/ -o keeporacle.sh && chmod +x keeporacle.sh && ./keeporacle.sh
 	
or

 	
wget https://keeporacle.pages.dev/ -O keeporacle.sh && chmod +x keeporacle.sh && ./keeporacle.sh

Source：https://hostloc.com/thread-1131732-1-1.html

lookbusy – Installation is at next section

 	
lookbusy -c 50 # 占用所有 CPU 核心各 50%

 	
lookbusy -c 50 -n 2 # 占用两个 CPU 核心各 50%

 	
lookbusy -c 50-80 -r curve # 占用所有 CPU 核心在 50%-80% 左右浮动

 	
lookbusy -c 0 -m 128MB -M 1000 # 每 1000 毫秒，循环释放并分配 128MB 内存

 	
lookbusy -c 0 -d 1GB -b 1MB -D 10 # 每 10 毫秒，循环进行 1MB 磁盘写入，临时文件不超过 1GB

Calculate Pi

 	
nohup echo "scale=99999999;4*a(1)" | bc -lq > /dev/null &

 	
nohup cpulimit -l 30   -p 22489 >/dev/null &

 	


 	
scale那个代表小数点后的位数，数越大计算时间越长

 	
-l 那里可以控制cpu使用率0-200

 	
-p 那里写程序的PID，通过top命令查找，或者 ps -aux | grep bc

Source：https://hostloc.com/thread-1131769-1-1.html

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

Create a new lookbusy systemd service：

systemctl edit --full --force lookbusy.service

service configuration

[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

Parameters: -c is for cpu percet usage，-m is for memory usage. You will need to change this accordingly. 

Start the service right away and put lookbusy servce also started when system booted：

systemctl enable --now lookbusy.service

Make the cpu running between 5% and 20% randomly. 

• screen -R lookbusy
• lookbusy -c 5-25 -r curve
• ctrl+a+d