headless | 易学教程

How can I run spark in headless mode in my custom version on HDP?

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问题 How can I run spark in headless mode? Currently, I am executing spark on a HDP 2.6.4 (i.e. 2.2 is installed by default) on the cluster. I have downloaded a spark 2.4.1 Scala 2.11 release in headless mode (i.e. no hadoop jars are built in) from https://spark.apache.org/downloads.html. The exact name is: pre-built with scala 2.11 and user provided hadoop Now when trying to run I follow: https://spark.apache.org/docs/latest/hadoop-provided.html export SPARK_DIST_CLASSPATH=$(hadoop classpath)

python get post模拟请求

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1.使用get方式时。url相似例如以下格式： [html] view plain copy index.jsp? id = 100 & op = bind GET报问头例如以下： [html] view plain copy GET /sn/index.php? sn = 123 & n = asa HTTP/1.1 Accept: */* Accept-Language: zh-cn host: localhost Content-Type: application/x-www-form-urlencoded Content-Length: 12 Connection:close 2.使用post方式时。POST方法将请求參数封装在HTTP请求数据中，以名称/值的形式出现，能够传输大量数据，可用来传送文件。 POST报文头例如以下： [html] view plain copy POST /sn/index.php HTTP/1.1 Accept: */* Accept-Language: zh-cn host: localhost Content-Type: application/x-www-form-urlencoded Content-Length: 12 Connection:close sn = 123 & n = asa 在http头后边有一空行

How to use both the Firefox Profile and Firefox options with Selenium in Java

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问题 I'm writing a test that I'd like to headless, which will also download a file within java using Selenium. from here I learn that you can set a driver to be headless by throwing this code before you initialize the driver: options.setHeadless(true); //sets driver to work headless WebDriver driver = new FirefoxDriver(options); and that I can use this method to write a Firefox Profile which will dictate a download directory and allow me to download a file with firefox w/o any pop up windows (I've

selenium 自动化工具

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问题今天在使用 selenium + PhantomJS 动态抓取网页时，出现如下报错信息： UserWarning: Selenium support for PhantomJS has been deprecated, please use headless versions of Chrome or Firefox instead warnings.warn('Selenium support for PhantomJS has been deprecated, please use headless ' 翻译过来就是：selenium已经放弃PhantomJS，了，建议使用火狐或者谷歌无界面浏览器。解决办法：我们就改用 Selenium + Headless Chrome 1.安装Chrome浏览器 2.安装Selenium pip install selenium 3.安装chromedriver chromedriver下载地址： https://sites.google.com/a/chromium.org/chromedriver/downloads （被墙了） http://npm.taobao.org/mirrors/chromedriver/（可用）注意：chromedriver的版本要与你使用的chrome版本对应，对应关系：点击链接下载完成后

Cannot locate elements using headless mode Selenium

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问题 I cannot locate elements using headless mode because of this restriction "All users will have to use google Chrome when accessing our sites." This restriction was added by our admins so users could use only Google chrome. My code is @Test(priority = 1) public void setupApplication() throws IOException { /* * open browser (GoogleChrome) and enter user credentials */ ChromeOptions options = new ChromeOptions(); options.addArguments("--window-size=1920,1080"); options.addArguments("--disable-gpu

PhantomJS can't load correctly web page

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问题 I'm currently trying to scrape a web page with PhantomJS and Selenium (python 2.7.9 on Windows 7) but PhantomJS fail to load correctly the web page. If I use Firefox as webdriver I have no problem to see the page as I want. At first I thought it was a javascript problem (page-side) since with save_screenshot I could see what normally the page shows when javascript is disabled, but if I disable javascript the page show me correctly that "Javascript must be enabled", so it is not a js problem.

K8S入门知识概念

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1.查看节点的日志信息： journalctl -u kubelet -n 1000 2.查看对应deployment的pod数量，并对其进行设置： kubectl get deployments & kubectl scale deployment nginx-deployment --replicas 3.node节点加入k8s集群： kubeadm join --token 1f627e.a37793601a406d7e 10.0.1.22:6443 --discovery-token-ca-cert-hash sha256:e12a8e1d1be7d308dad31bebdb2684d9d4ba7e5ae290f4fd1f855089b1abe71a 4.K8S给node设置污点策略： kubectl taint nodes node1 key=value:NoSchedule -- 新的不能容忍的 pod不能再调度过来，但是老的运行在node上不受影响 kubectl taint nodes node1 key=value:NoExecute -- 新的不能容忍的 pod不能调度过来，老的pod也会被驱逐 kubectl taint nodes node1 key=value:PreferNoSchedule --pod会尝试将pod分配到该节点 5

How to initiate Chrome Canary in headless mode through Selenium and Python

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问题 from selenium import webdriver options = webdriver.ChromeOptions() options.binary_location = 'C:\Users\mpmccurdy\Desktop\Google Chrome Canary.lnk' options.add_argument('headless') options.add_argument('window-size=1200x600') driver = webdriver.Chrome(chrome_options=options) driver.get("https://www.python.org") 回答1: If you are using Chrome Canary as a basic Requirement the server still expects you to have Chrome installed in the default location as per the underlying OS architecture as follows

xclock works, X11 DISPLAY set but still java.awt.HeadlessException:

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问题 Getting a java.awt.HeadlessException seems to be a pretty common issue and has been discussed in the. following questions: "No X11 DISPLAY variable" - what does it mean? Getting a HeadlessException: No X11 DISPLAY variable was set java.awt.HeadlessException: No X11 DISPLAY variable was set, but this program performed an operation which requires it java.awt.HeadlessException: No X11 DISPLAY variable was set, but this program performed an operation which requires it The solutions suggest to

关于k8s service

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1、service类型 service主要类型包括clusterIP(headless)、nodeport、LB。 clusterip：集群内部可以访问的固定虚机IP地址； headless：是不分配cluster IP地址的cluster服务类型，可通过DNS访问cluster，也可通过指定podname.clustername.<namespace name>.svc.cluster.local，访问指定的pod； nodeport：将service的port射到节点的port，外部可通过node ip + port的方式直接访问service； LB：负载均衡器后端服务器为集群各节点IP+nodePort； 2、服务发现定义服务的时候，通过service的selector指定pods，并根据pods的IP创建相应的endpoints，endpoints controller监听watch service以及pod的变化，维护endpoint的详细；kube-proxy根据service和endpoint来维护本地的路由规则，当endpoint发生变化，即service及其关联的pod发生变化，kube-proxy都会在每个节点上更新iptables； 3、kube-proxy实现模式当前支持的代理模式主要是ipvs、iptables； iptables