docker-compose v3 版本中限制容器资源
本示例， 展示在docker-compose v3 版本下, 如何限制容器资源。源码
docker-compose文件配置:
version: '3'
services:
py-demo:
image: python:3.7.6-alpine
command: ["python", "-u", "demo_server.py"]
restart: always
working_dir: /app
volumes:
- ./:/app
environment:
TZ: Asia/Shanghai
deploy:
resources:
limits:
cpus: '1'
memory: 100M
reservations:
cpus: '0.5'
memory: 10M
demo_server.py 模拟内存分配:
import time
memory_list = []
if __name__ == '__main__':
print("start container")
while True:
key = str(int(time.time()))
new_list = ["{}_{}".format(key, i) for i in range(100 * 10000)]
memory_list.extend(new_list)
print("memory len: {}".format(len(memory_list)))
time.sleep(1)
使用兼容模式启动 docker-compose:
#!/bin/bash
docker-compose --compatibility up -d
sleep 1
docker-compose logs -f
执行示例：
docker-compose down
chmod +x ./start.sh
./start.sh
结果：
py-demo_1 | start container
py-demo_1 | memory len: 1000000
py-demo_1 | memory len: 2000000
py-demo_1 | start container
py-demo_1 | memory len: 1000000
py-demo_1 | memory len: 2000000
py-demo_1 | start container
py-demo_1 | memory len: 1000000
py-demo_1 | memory len: 2000000
py-demo_1 | start container
py-demo_1 | memory len: 1000000
py-demo_1 | memory len: 2000000
docker stats 结果:
结果表明：docker-compose v3 下, 配合 docker-compose --compatibility up 可以限制容器使用资源.