1. Jenkins Working Modes Jenkins has a single-Master, multi-Slave architecture. The Master assigns tasks and manages services. Slaves execute the actual tasks. Even when multiple Masters are deployed, they remain independent of one another and cannot coordinate scheduling. A high-availability Jenkins solution requires an external task distribution framework, such as

1. Why Dial Testing For some of the critical services in a system, we usually set up monitoring. When a failure occurs, it can be detected as quickly as possible and a notification sent to the people who care. Once a failure has occurred, the failure process can be traced

One of the illusions that programmers at big companies easily fall into is mistaking platform capabilities for their own abilities. In a large team, we should not focus only on our own little patch of ground; we need to understand every part of the platform. On one hand, this helps us make better use of the platform’s features; on the other, it helps our own technical growth.

1. Installing a Headless Browser 1.1 Installing PhantomJS on CentOS Download and extract Visit Phantomjs, find the download link for Download phantomjs-2.1.1-linux-x86_64.tar.bz2, and copy it. Run the following commands on CentOS: 1 2 3 4 5 wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2 # 如果没有安装 bzip2 可能会报

1. Basic Concepts master master is where Jenkins is installed and runs; it is responsible for parsing job scripts, handling tasks, and scheduling compute resources. agent agent is responsible for handling tasks dispatched from master; the actual operations are executed through an executor. executor An executor is the compute resource