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crazylion lee

Build web application with Golang - GitBook - 0 views

www.gitbook.com/...details

go web

shared by crazylion lee on 17 Apr 16 - No Cached
  • crazylion lee on 17 Apr 16
     
    "Build web application with Golang"
張 旭

Blog Tutorial - Adding a layer - CakePHP Cookbook v2.x documentation - 1 views

book.cakephp.org/...part-two.html

cakephp MVC framework php development

shared by 張 旭 on 08 Sep 13 - No Cached
  • Cake views are just presentation-flavored fragments that fit inside an application’s layout. For most applications they’re HTML mixed with PHP, but they may end up as XML, CSV, or even binary data.
  • Layouts are presentation code that is wrapped around a view, and can be defined and switched between
  • if the HTTP method of the request was POST, try to save the data using the Post model.
  • ...6 more annotations...
  • You can also specify URLs relative to the base of the application in the form of /controller/action/param1/param2.
  • Every CakePHP request includes a CakeRequest object which is accessible using $this->request.
  • When a user uses a form to POST data to your application, that information is available in $this->request->data.
  • The $this->Form->input() method is used to create form elements of the same name.
  • postLink() will create a link that uses Javascript to do a POST request deleting our post.
  • Allowing content to be deleted using GET requests is dangerous
張 旭

Blog Tutorial - CakePHP Cookbook v2.x documentation - 0 views

book.cakephp.org/...blog.html

web MVC framework php development blog cakephp

shared by 張 旭 on 07 Sep 13 - No Cached
  • need to have PDO, and pdo_mysql enabled in your php.ini.
  • will run into mod_rewrite issues
張 旭

跳出运维，才能做好运维（凤凰项目）书评 - 0 views

book.douban.com/9346219

devops system

shared by 張 旭 on 29 Dec 18 - No Cached
  • 1. 业务项目：这些通常是公司业务部门，比如产品研发部门或销售部门所提出的需求，比如新产品发布上线、为客户做实施、双十一这种大促活动的规划等等。这些工作通常具有一定的系统性，需要部门间通力合作。2. 内部项目：运维部门内部围绕业务项目所实施的一些列基础设施研发，部署自动化、多环境构建、持续交付、监控报警等等。3. 变更：根据其它部门申请，对运维组件进行变更操作，相对于业务项目，变更通常都会比较零散，比如加权限、开端口、开机器等等。对于变更，我们要维护好操作记录，做到有迹可寻。4. 计划外的工作：无法预料的问题处理，即“救火”。
  • 计划外的工作越多，就会占用其它三种工作的时间，导致其它三种工作大量积累。
  • 运维内部的基础建设跟不上，无法从根上去思考和解决计划外的工作，就会造成一种恶性循环，做不完的工作越堆越多（书中喜欢叫这玩意儿"半成品"）直至让人崩溃。
  • ...4 more annotations...
  • 一些周期性的工作对于运维其实也是非常重要的，比如对组件进行周期性的巡检、压测、像ChaosMonkey那样对分布式系统进行随机破坏、灾难演习、备份演习等等。不过这些也可以归结在内部项目之中
  • 流水线可视化了后，除了解决掉瓶颈节点，其它的诸如任务优先级、任务的依赖关系、每批次解决的任务数量，也都会显示出来并得到解决。
  • 反馈和朔源。我们需要知道每种任务流水线的每个环节的执行情况，效率、质量，然后与该环节相关的部门一起去探讨和优化改进的措施，比如部署时间过长，那么就要与开发团队一起优化打包流程和部署所依赖的中间件架构；线上故障太多，那么就需要联合开发和QA部门一道，去审视这些故障所爆发的源头，定制解决方案，等等
  • 第三步，就需要建立一种文化机制，努力把这种工作方式延续下去，做到持续改进，越来越好！
張 旭

BIND9 named.conf Zone Transfer and Update statements - 0 views

www.zytrax.com/...xfer.html

dns networking system bind

shared by 張 旭 on 30 Aug 19 - Cached
  • update-policy only applies to, and may only appear in, zone clauses. This statement defines the rules by which DDNS updates may be carried. It may only be used with a key (TSIG or SIG(0)) which is used to cryptographically sign each update request. It is mutually exclusive with allow-update in any single zone clause. The statement may take the keyword local or an update-policy-rule structure. The keyword local is designed to simplify configuration of secure updates using a TSIG key and limits the update source only to localhost (loopback address, 127.0.0.1 or ::1), thus both nsupdate (or any other application using DDNS) and the name server being updated must reside on the same host.
  • 張 旭 on 30 Aug 19
     
    "update-policy only applies to, and may only appear in, zone clauses. This statement defines the rules by which DDNS updates may be carried. It may only be used with a key (TSIG or SIG(0)) which is used to cryptographically sign each update request. It is mutually exclusive with allow-update in any single zone clause. The statement may take the keyword local or an update-policy-rule structure. The keyword local is designed to simplify configuration of secure updates using a TSIG key and limits the update source only to localhost (loopback address, 127.0.0.1 or ::1), thus both nsupdate (or any other application using DDNS) and the name server being updated must reside on the same host. "
張 旭

手动安装 Prometheus · 从 Docker 到 Kubernetes 进阶手册 - 1 views

www.qikqiak.com/...6%9C%AC%E4%BD%BF%E7%94%A8.html

kubernetes prometheus monitor log

shared by 張 旭 on 31 Oct 19 - No Cached
  • 参数storage.tsdb.path指定了 TSDB 数据的存储路径、通过storage.tsdb.retention设置了保留多长时间的数据，还有下面的web.enable-admin-api参数可以用来开启对 admin api 的访问权限，参数web.enable-lifecycle非常重要，用来开启支持热更新的，有了这个参数之后，prometheus.yml 配置文件只要更新了，通过执行localhost:9090/-/reload就会立即生效，所以一定要加上这个参数。
  • Prometheus 由多个组件组成，但是其中许多组件是可选的： Prometheus Server：用于抓取指标、存储时间序列数据 exporter：暴露指标让任务来抓 pushgateway：push 的方式将指标数据推送到该网关 alertmanager：处理报警的报警组件 adhoc：用于数据查询
  • scrape_configs 用于控制 prometheus 监控哪些资源。
  • ...6 more annotations...
  • prometheus 通过 HTTP 的方式来暴露的它本身的监控数据
  • prometheus 默认会通过目标的/metrics路径采集 metrics
  • 需要配置 rbac 认证，因为我们需要在 prometheus 中去访问 Kubernetes 的相关信息
  • 要获取的资源信息，在每一个 namespace 下面都有可能存在，所以我们这里使用的是 ClusterRole 的资源对象，值得一提的是我们这里的权限规则声明中有一个nonResourceURLs的属性，是用来对非资源型 metrics 进行操作的权限声明
  • 添加一个securityContext的属性，将其中的runAsUser设置为0，这是因为现在的 prometheus 运行过程中使用的用户是 nobody，否则会出现下面的permission denied之类的权限错误
  • PromQL其实就是 prometheus 便于数据聚合展示开发的一套 ad hoc 查询语言的，你想要查什么找对应函数取你的数据好了。
  • 張 旭 on 31 Oct 19
     
    "参数storage.tsdb.path指定了 TSDB 数据的存储路径、通过storage.tsdb.retention设置了保留多长时间的数据，还有下面的web.enable-admin-api参数可以用来开启对 admin api 的访问权限，参数web.enable-lifecycle非常重要，用来开启支持热更新的，有了这个参数之后，prometheus.yml 配置文件只要更新了，通过执行localhost:9090/-/reload就会立即生效，所以一定要加上这个参数。"
crazylion lee

Amazon.com：Creative Selection： Inside Apple's Design Process During the Golde... - 0 views

www.amazon.com/...1250194466

apple design

shared by crazylion lee on 22 Feb 21 - No Cached
  • crazylion lee on 22 Feb 21
     
    "Creative Selection： Inside Apple's Design Process During the Golden Age of Steve Jobs"
張 旭

CDC and DDL Changes to Source Tables - Microsoft® SQL Server 2012 Unleashed [... - 1 views

www.oreilly.com/...ch40lev2sec42.html

database sql

shared by 張 旭 on 03 Feb 23 - No Cached
  • One of the common challenges when capturing data changes from your source tables is how to handle DDL changes to the source tables.
  • Change Data Capture
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