Openshift部署zalenium(容器化的selenium)及Python自动测试

什么是zalenium

zalenium是一个Selenium Grid扩展，用Docker容器动态扩展你的本地网格。它使用docker-selenium在本地运行Firefox和Chrome中的测试。官网地址 zalenium

Openshift上部署zalenium

创建zalenium项目

1	oc new-project zalenium --display-name="自动测试Selenium Grid"

创建Service Account

# 创建ClusterRole
# oc create -f zalenium-role.json
{
    "kind": "ClusterRole",
    "apiVersion": "v1",
    "metadata": {
        "name": "zalenium-role"
    },
    "rules": [
        {
            "verbs": [
                "create",
                "list",
                "get",
                "delete",
                "exec"
            ],
            "attributeRestrictions": null,
            "apiGroups": [
                ""
            ],
            "resources": [
                "pods"
            ]
        },
        {
            "verbs": [
                "list",
                "create",
                "delete",
                "get"
            ],
            "attributeRestrictions": null,
            "apiGroups": [
                ""
            ],
            "resources": [
                "services"
            ]
        },
        {
            "verbs": [
                "create",
                "get"
            ],
            "attributeRestrictions": null,
            "apiGroups": [
                ""
            ],
            "resources": [
                "pods/exec"
            ]
        }
     ]
}

oc create -f zalenium-role.json
oc  create sa zalenium
oc adm policy add-scc-to-user anyuid -z zalenium
oc adm policy add-role-to-user zalenium-role -z zalenium

部署zalenium

oc run zalenium --image=dosel/zalenium \
        --env="ZALENIUM_KUBERNETES_CPU_REQUEST=250m" \
        --env="ZALENIUM_KUBERNETES_CPU_LIMIT=500m" \
        --env="ZALENIUM_KUBERNETES_MEMORY_REQUEST=1Gi" \
        --overrides='{"spec": {"template": {"spec": {"serviceAccount": "zalenium"}}}}' \
        -l app=zalenium,role=hub --port=4444 -- \
        start --desiredContainers 2 --seleniumImageName elgalu/selenium:latest

创建Service

#创建相应的service
# oc create -f zalenium-service.yaml
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  labels:
    app: zalenium
  name: zalenium
spec:
  ports:
  - name: 4444-tcp
    port: 4444
    protocol: TCP
    targetPort: 4444
  - name: 4445-tcp
    port: 4445
    protocol: TCP
    targetPort: 4445
  selector:
    app: zalenium
    role: hub
  sessionAffinity: None
  type: ClusterIP
status:
loadBalancer: {}

创建Router

# oc create -f ./zalenium-route.yaml
apiVersion: v1
kind: Route
metadata:
  name: zalenium
  annotations:
    haproxy.router.openshift.io/timeout: 60s
spec:
  host: zalenium.example.com
  port:
    targetPort: 4444-tcp
  to:
    kind: Service
name: zalenium

访问被管理selenium状态

http://zalenium-zalenium.demo.example.com/grid/admin/live
zalenium演示.PNG

Python具体实现自动测试

安装selenium模块

1	pip install selenium

代码

# -*- coding: utf-8 -*-
from selenium import webdriver
from selenium.webdriver.remote.remote_connection import RemoteConnection
# 创建远程连接selenium grid
remoteconnection = RemoteConnection('http://zalenium-zalenium.demo.example.com/wd/hub', keep_alive=False,
                                    resolve_ip=False)

driver = webdriver.Remote(command_executor=remoteconnection,
                          desired_capabilities={
                              'browserName': "chrome",
                              'video': 'True',
                              'platform': 'LINUX',
                              'platformName': 'LINUX'
                          })
try:
    driver.implicitly_wait(30)
    driver.maximize_window()
    driver.get("http://www.baidu.com")
    assert u'百度一下，你就知道' in driver.title
    kw_input = driver.find_element_by_id('kw')
    su_button = driver.find_element_by_id('su')
    kw_input.clear()
   # 输入关键字Openshift
    kw_input.send_keys('Openshift')
    su_button.click()

finally:
    driver.quit()

说明：
创建RemoteConnection时需要设置keep_alive=False及设置resolve_ip=False。
resolve_ip默认为True，它会解析senelium grip服务器的ip,便通过Ip去访问。我们知道Openshift的应用是无法使用ip来访问的，必须使用域名。所以需要将resolve_ip设置为False。当然，如果我们部署zalenium中的service使用nodeport将4444端口暴露出去的resolve_ip可以使用默认值。