Docker

安装

Ubuntu安装Docker https://docs.docker.com/engine/install/ubuntu/

docker info

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container

查看运行的container
docker ps
查看所有container
docker ps -a
关闭container
docker stop name

查看容器占用的端口
netstat -antp

docker stats 'commandname' /--help
关闭所有容器
docker stop $(docker ps -a | awk '{ print $1}' | tail -n +2) 
 删除所有容器
docker rm $(docker ps -a | awk '{ print $1}' | tail -n +2)
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image

查看所有image
docker images
删除image
docker rmi REPOSITORY:TAG
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Sock Shop

Sock Shop官网 https://microservices-demo.github.io/

git clone https://github.com/microservices-demo/microservices-demo
cd microservices-demo

docker-compose -f deploy/docker-compose/docker-compose.yml up -d
# 访问http://localhost/ 

docker-compose -f deploy/docker-compose/docker-compose.yml down
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Locust负载测试库

学习资料

B站教学 https://www.bilibili.com/video/BV16441157rv
博客资料 https://dandelioncloud.cn/article/details/1441332087940042754

Locust官网 https://locust.io/
官方使用文档 https://docs.locust.io/en/stable/what-is-locust.html

使用代码示例

• 访问百度

from locust import HttpUser, TaskSet, task

class TestIndex(TaskSet):
    @task
    def getIndex(self):
        abstract = True
        self.client.get('/')

class WebSite(HttpUser):
    tasks = [TestIndex]
    min_wait = 1000
    max_wait = 2000
# 进入到程序文件所在目录，运行以下命令
# locust -f test.py --host=http://www.baidu.com
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通过浏览器访问 http://localhost:8089 进行模拟访问设置

• 访问系统接口

import random
from locust import HttpUser, TaskSet, task

class Testlogin(TaskSet):
    # 初始化方法
    def on_start(self):
        self.loginData = [
            {'username': 'admin1', 'pwd': 123},
            {'username': 'admin2', 'pwd': 123},
            {'username': 'admin3', 'pwd': 123}
        ]

    @task
    def doLogin(self):
        # 1000以内的数对3取余，0 1 2
        idx = random.randint(1, 1000) % len(self.loginData)
        # 请求正文接受的是字典
        body = {'username': 'admin', 'pwd': 123}
        # 发送post请求并得到相应
        response = self.client.post('/W/user/login'
                                    , data=self.loginData[idx]
                                    , catch_response=True
                                    )
        # 断言(检查点) 必须设置catch_response=True
        # 这样会把登录失败记录为failure
        if 'login-pass' in response.text:
            response.success()
        else:
            response.failure('Can not login')

        print(response.text)  # 包含成功与否的信息


class WebSite(HttpUser):
    tasks = [Testlogin]
    min_wait = 1000
    max_wait = 2000
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Prometheus

CAdvisor监听容器

docker run \
  --volume=/:/rootfs:ro \
  --volume=/var/run:/var/run:rw \
  --volume=/sys:/sys:ro \
  --volume=/var/lib/docker/:/var/lib/docker:ro \
  --volume=/dev/disk/:/dev/disk:ro \
  --publish=8082:8080 \
  --detach=true \
  --name=cadvisor \
  google/cadvisor:latest
docker start cadvisor
192.168.118.128:8082


查看这些指标
curl http://localhost:9100/metrics | grep "node_"
curl localhost:9100/metrics | grep -i node_cpu | head

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