h�ps://www.python.org Python由Guido van Rossum于1989年底发明，于1991年发行第一版， Python源代码遵循GPL协议 Python是一种解释型、面向对象、动态数据类型、可交互的语言 python2.0于2000-10-16发布，于2020年1月1日停止更新2.x版本， Python-2.7成为最后一个py 2.x版本 python3.0于2008-12-03发布 global raise def if return del import try elif in while else is with except lambda yiel ★标准数据类型 number int bool float complex ( 1+2j ) （python3无long长整型） True=1, False=0 string 有序strx='xxxx' 关键字必须互不相同 bytes 有序 字节数组，其元素值不可变，其元素类型为int （0~255） py3新增 bytearray 有 序 字 节 数 组 ， 其 元 素 值 可 变 ， 其 元 素 类 型 为 int （0~255） py3新增 不可变类型： Number String Tuple bytes 可变类型： List Dic�onary Set bytearray

gateway 10.99.1.1 # nmcli con up ens33 ③关闭seLinux 若不会配置selinux，则可关闭SELinux，若对安全性要求较高，则需自行配置 # sed -i '/^SELINUX/s/enforcing/disabled/' /etc/selinux/config # setenforce 0 #关闭selinux local <I DOCKER 1 -s 0.0.0.0/0 -j ACCEPT /usr/sbin/iptables -I DOCKER-USER 1 -s 0.0.0.0/0 -j ACCEPT /usr/sbin/iptables -I DOCKER-ISOLATION-STAGE-1 1 -s 0.0.0 0.0/0 -j ACCEPT /usr/sbin/iptables -I DOCKER-ISOLATION-STAGE-2 1 -s 0.0.0.0/0 -j ACCEPT EOF ★最好的做法是让docker不生成默认的docker0网桥，不修改iptables规则 # cat > /etc/docker/daemon.json <

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h�ps://www.heidisql.com/ pgAdmin官网下载： h�ps://www.pgadmin.org/download/ 下载并安装最新版本的HeidiSQL，新建会话，网络类型为PostgreSQL(TCP/IP)，依 赖库要>=目标pg数据库版本 下载最新版本的pgAdmin并安装运行 ★第6章、数据库及表基础操作 pg数据库名称及表名称不区分大小写

Predictably Irrational – The Hidden Forces That Shape Our Decisions By Dan Ariely “If I were to distill one main lesson from the research described in this book, it is that we are pawns in a game whose Is Relative – Even When It Shouldn’t Be  Examples: House Shopping, Vacations,  Observations: o “humans rarely choose things in absolute terms. We don’t have an internal value meter that tells us Rather, we focus on the relative advantage of one thing over another, and estimate value accordingly” o “we not only tend to compare things with one another but also tend to focus on comparing things that

make detailed plans beyond a program’s ability to control or accurately predict future circumstances o Agile methodology does not force programs to establish their full scope, requirements, and design at define the desired system functions and provide the foundation for Agile estimation and planning. o They describe what the users want to accomplish with the resulting system. User stories help ensure requirements than large requirements documents.  DON’T treat planning as a one-time up front activity o In lieu of CDDs and CPDs, programs can develop Requirements Definition Packages (RDPs) to capture a

Way – The Technical Practices of Feedback 1. Introduction a. Goal – Implement fast feedback loops i. Enable working towards shared goals ii. See problems as they occur iii. Enable quick detection & Create Telemetry to Enable Seeing and Solving Problems a. Fact – Things will go wrong in Operations! i. 2001 Microsoft Operation Framework study found the best-performing organization were better at diagnosing performers had MTTR 168x faster than low performers b. CREATE OUR CENTRALIZED TELEMETRY INFRASTRUCTURE i. Remove the silos of information – Developers don’t just log what’s interesting to development. Operations

Velocity Conference 2015 What is Velocity all about? What did I learn? Service Workers: The Practical Bits by Patrick Meenan (Google) @patmeenan http://www.slideshare.net/patrickmeenan/service-workers-for-performance Monitoring: more valuable than any other metric  Web Performance: 2 seconds is the magic number Whom did I meet?Attributions and References [1] Speaker Slides and Videos: http://velocityconf.com/devops-web e/proceedings [2] YouTube Playlist: https://www.youtube.com/playlist?list=PL055Epbe6d5Y86GSg3nhUH3o_v62FGpCI

★配置yum源 # curl -ks h�ps://packages.gitlab.com/install/repositories/gitlab/gitlab- ce/script.rpm.sh -o script.rpm.sh # bash script.rpm.sh #安装官方yum源 # cat /etc/yum

a. Goal – practices to enable learning as quickly, frequently, cheaply, and as soon as possible i. Institutionalize rituals to increase safety, continuous improvement, and learning ii. Create mechanism and Inject Learning into Daily Work a. Complex systems are impossible to predict for all outcomes i. Dr. Steven Spear - resilient organizations are “skilled at detecting problems, solving them, and multiplying architected for failure, tested for failure, and evolved beyond it b. ESTABLISH A JUST, LEARNING CULTURE i. Unjust responses to incidents 1. Impede safety 2. Promote fear over mindfulness 3. Create bureaucracy

Foreword xix 3. Imagine a World Where Dev and Ops Become DevOps: a. THE CORE, CHRONIC CONFLICT i. Among them are the two following goals, which must be pursued simultaneously: 1. Respond to the rapidly 2. Provide stable, reliable, and secure service to the customer b. THE BUSINESS VALUE OF DEVOPS i. Code and change deployments (thirty times more frequent) ii. Code and change deployment lead time service (168 times faster) 4. An Introduction to The DevOps Handbook xxi 5. PART I—THE THREE WAYS 1 a. Introduction i. THE LEAN MOVEMENT 1. manufacturing lead time required to convert raw materials