Begin $my_variable = "A bunch of text" notify {$my_variable:} Yup, that’s a variable, all right. refer: https://docs.puppetlabs.com/learning/variables.html…

Learning Puppet — Resource Ordering Learn about dependencies and refresh events, manage the relationships between resources, and discover the fundamental Puppet design pattern. Disorder Let’s look back on one of our manifests from the last page: [roo…

Learning Puppet — Resources and the RAL Welcome to Learning Puppet! This series covers the basics of writing Puppet code Begin Log into the Learning Puppet VM as root, and run puppet resource service. This command will return something like the follo…

Begin In a text editor — vim, emacs, or nano — create a file with the following contents and filename: written and applied your first Puppet manifest. [root@yum01 ~]# useradd testuser [root@yum01 ~]# cat /etc/passwd |grep testtestuser:x:536:536::/hom…

Puppet configures systems in two main stages: Compile a catalog Apply the catalog The Agent/Master Architecture Puppet usually runs in an agent/master architecture, where a puppet master server controls important configuration info and managed agent…

检查语法错误 puppet parser validate xx.pp 在客户端测试但是不应用 puppet agent --test --noop 基于安全的考虑,使用预签名证书 puppet cert --generate <hostname> 使用如下命令为 client1.example.com 生成预签名证书: puppet cert --generate client1.example.com Puppet 现在将为客户端 client1.example.com 生成并签署客户端证…

本文有感于<精通Puppet配置管理工具>在豆瓣上的某些差评而顺手写的书评. 半路出家   故事要从12年初说起.  某天,部门老大让我所在team的老大调研一下当下业界的配置管理工具.于是我的老大给我分配了一个棘手的任务,要求我转型去做devops,并尝试在本季度内使用Puppet来管理现有的IAAS内部平台上的所有业务,工作成果计入KPI.    于是,我半路出家从dev转成了ops.    我花了几天的时间把learning Puppet动手练习了一遍,在会使用几个基础的resource…

一.简介 1.国际惯例什么是puppet puppet是一种Linux.Unix.windows平台的集中配置管理系统,使用自有的puppet描述语言,可管理配置文件.用户.cron任务.软件包.系统服务等.puppet把这些系统实体称之为资源,puppet的设计目标是简化对这些资源的管理以及妥善处理资源间的依赖关系. puppet采用C/S星状的结构,所有的客户端和一个或几个服务器交互.每个客户端周期的(默认半个小时)向服务器发送请求,获得其最新的配置信息,保证和该配置信息同步.每个puppe…

Puppet:IT基础设施自动化管理工具 参考文章: https://yq.aliyun.com/articles/120228 http://www.51niux.com/?id=105 http://www.zsythink.net/archives/category/%E8%BF%90%E7%BB%B4%E7%9B%B8%E5%85%B3/puppet/ 可以管理整个生命周期: provisioning:自动化安装系统 configuration:配置 orchestration:编排 …

一.简介 puppet是什么?它能做什么? puppet是一个IT基础设施自动化运维工具,它能够帮助系统管理员管理基础设施的整个生命周期:比如,安装服务,提供配置文件,启动服务等等一系列操作:基于puppet,可实现自动化重复任务.快速部署关键性应用以及在本地或云端完成主动变更和快速扩展架构规模等:它遵循GPL协议(2.7.0以前),基于ruby语言开发,2.7.0以后使用apache 2.0协议: puppet架构 提示:puppet是master/agent架构,master和agent使用…

1. 简介 1.1. 官方网站:https://docs.puppet.com/ 1.2. puppet是IT基础设施自动化管理工具,他的整个生命周期包括:provisioning,configuration,orchestration,reporting 1.3. puppet是master/agent模型的,但是agent可以独立执行操作,agent是真正执行相应管理操作的核心部件,他会周期地去master请求与自己相关的配置 1.4. puppet的工作模式: 声明性.基于模型: 定义:使…

背景 公司计划在年底做一次大型市场促销活动,全面冲刺下交易额,为明年的上市做准备.公司要求各业务组对年底大促做准备,运维部要求所有业务容量进行三倍的扩容,并搭建出多套环境可以共开发和测试人员做测试,运维老大为了在年底有所表现,要求运维部门同学尽快实现,当你接到这个任务时,有没有更快的解决方式? 技术说明 随着信息时代的持续发展,IT运维已经成为IT服务内涵中重要的组成部分.面对越来越复杂的业务,面对越来越多样化的用户需求,不断扩展的IT应用需要越来越合理的模式来保障IT服务能灵活便捷.安全稳定地…

Documentation | AnsibleWorks   Welcome to the Ansible documentation! Ansible is an IT automation tool. It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous deployments or zero downtime rolling updates.…

目录 1.with_items 2.with_nested嵌套循环 3.with_dict 4.with_fileglob文件匹配遍历 5.with_lines 6.with_subelement遍历子元素 7.with_sequence循环整数序列 8.with_random_choice随机选择 9.do-Util循环 10.循环注册变量 11.with_together遍历数据并行集合 在使用ansible做自动化运维的时候,免不了的要重复执行某些操作,如:添加几个用户,创建几个MySQL…

C 基础 原文地址:http://rypress.com/tutorials/objective-c/c-basics OC 可以说是C语言的一个超集,这样你可以无缝的和C语言结合编程也就是你可以这两种语言编写同一份代码文件.事实上OC语言的大部分核心内容还是依赖于C语言的,所以在学习OC之前与必要将C语言的知识重新梳理总结一下. The relationship between Objective-C and C 上述图片给出了OC和C之间的关系.我们将在本节中讨论C语言(或者说OC)的注释.…

Machine Learning – Coursera Octave for Microsoft Windows GNU Octave官网 GNU Octave帮助文档 (有900页的pdf版本) Octave 4.0.0 安装 win7(文库) Octave学习笔记(文库) octave入门(文库) WIN7 64位系统安装JDK并配置环境变量(总是显示没有安装Java) MathWorks This week we're covering linear regression with mul…

Shell built-in variables [Purpose]        Learning shell built-in variables, example $0,$1,$2,$3,$#,$$,$*,$@,$-,$?   [Eevironment]        Ubuntu 16.04 bash env   [Procdeure] Source code: #!/bin/bash echo "shell args option" echo "script nam…

1.Multiple features So what the form of the hypothesis should be ? For convenience, define x0=1 At this time, the parameter in the model is a ( + 1)-dimensional vector, and any training instance is also a ( + 1)-dimensional vector. The dimension of t…

https://www.coursera.org/learn/machine-learning/exam/7pytE/linear-regression-with-multiple-variables 1. Suppose m=4 students have taken some class, and the class had a midterm exam and a final exam. You have collected a dataset of their scores on the…

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1. notation: n = number of features x(i) = input (features) of ith training example  = value of feature j in ith training example 2. Hypothesis: 3. Cost function: 4. Gradient descent: Repeat { } substituting cost function, then Repeat { (simultaneous…

Machine Learning Methods: Decision trees and forests This post contains our crib notes on the basics of decision trees and forests. We first discuss the construction of individual trees, and then introduce random and boosted forests. We also discuss…

master/agent模式的工作流程 agent每隔固定时长会向master端发送nodename(自己的节点名,节点名至关重要)和 facts ,并且向服务器端请求自己的catalog. master端收到以后首先(classify)分类识别来请求的是哪一个客户端和这个客户端要哪些东西,于是master端就在本地根据定义的站点清单给这个agent端声明哪些类. Ps:每一个agent端必须向master端明确的发送自己的nodename. master端依靠nodename识别agent端,…

DEEPCODER: LEARNING TO WRITE PROGRAMS Basic Information Authors: Matej Balog, Alexander L. Gaunt, Marc Brockschmidt, Sebastian Nowozin, Daniel Tarlow Publication: ICLR'17 Description: Generate code based on input-output examples via neural network te…

Introduction to Learning to Trade with Reinforcement Learning http://www.wildml.com/2018/02/introduction-to-learning-to-trade-with-reinforcement-learning/ Thanks a lot to @aerinykim, @suzatweet and @hardmaru for the useful feedback! The academic Deep…

http://www.wildml.com/2015/12/implementing-a-cnn-for-text-classification-in-tensorflow/ The academic Deep Learning research community has largely stayed away from the financial markets. Maybe that’s because the finance industry has a bad reputation,…

通常,play的结果可能取决于变量的值,facts(有关远程系统的知识)或先前的任务结果. 在某些情况下,变量的值可能取决于其他变量. 此外,可以创建其他组,以根据主机是否与其他条件匹配来管理主机. 在Ansible中有许多控制执行流程的选项. 支持条件的更多示例可以在这里找到: http : //jinja.pocoo.org/docs/dev/templates/#comparisons When 语句 有时您会想要跳过特定主机上的特定步骤. 如果操作系统是特定版本,这可能是一个简单的方法,…

ICLR 2013 International Conference on Learning Representations May 02 - 04, 2013, Scottsdale, Arizona, USA ICLR 2013 Workshop Track Accepted for Oral Presentation Zero-Shot Learning Through Cross-Modal Transfer Richard Socher, Milind Ganjoo, Hamsa Sr…

About this Course If you want to break into cutting-edge AI, this course will help you do so. Deep learning engineers are highly sought after, and mastering deep learning will give you numerous new career opportunities. Deep learning is also a new "s…

##Advice for Applying Machine Learning Applying machine learning in practice is not always straightforward. In this module, we share best practices for applying machine learning in practice, and discuss the best ways to evaluate performance of the le…