Opening: free and open source zookeeper tutorial (serial)

itread01 2021-01-21 13:48:57
opening free open source zookeeper


The author of this article :HelloGitHub- Lao Xun

## One 、 cause > A good start , It's half the battle . I'm the author [ Lao Xun ](, An ordinary programmer , No 985 and 211 The background of , I've never worked in a big factory . Just like to study technology , I've always wanted to do a complete series of explaining technology . And then I joined HelloGitHub Open source organizations , With your encouragement and help , I started a series of lectures . After discussion with the egg , Finally, the theme of this series is the top open source project ZooKeeper Hereinafter referred to as ZK.> ZooKeeper yes Apache A software project from the software foundation , It provides open source distributed configuration services for large-scale distributed computing 、 Synchronization services and naming registration . ZooKeeper It used to be Hadoop A subproject of , Now it's a top-level independent open source project . The reasons for choosing it are as follows :- ZK I used to be around last year , I've studied it for a while , It's just that I didn't make too many records at that time , Just look around for yourself , But it didn't sort it out , There is always a trace of regret in my heart - I am Java Programmer , So in terms of reading comprehension , Let's see Java The most intimate code , Most comfortable , And I've developed a certain degree of naked eye DEBUG Ability , You don't need to run the program to deduce the whole process in your mind - ZK Itself is a basic coordination framework , And other programming languages also have corresponding clients , So the audience is quite wide , And ZK The architecture itself is decentralized , It has a certain complexity , It's worth learning - ZK There are few books on the market ( Compared with MySQL or Redis) And it's based on ZK The old version of ( Not the latest version ), I want to do my best to contribute to the open source community ![]( Two 、 Introduce > The series is based on the current ZK The latest version :3.6.2 This series is a continuation of HelloGitHub Of Hello The universe , Call it 「HelloZooKeeper」. The article is divided into several parts :- Basic introduction ( Installation and use )- Business process - Data memory model - Elections - Conversation management - Persistence & Agreement - Interview questions - Configuration Daquan and other ZK The hidden function of is just about the above topics , And because ZK The topic itself is quite big , On the other hand, limited by my level , There's no way to do everything in detail 、 ing , So if there is a supplement later, I will make a single article , Add in .![]( 3、 ... and 、 Content > Every step of the way , It's thousands of miles away .>> Not a little stream , There is no river or sea . The explanation of principles will inevitably be linked with boredom , Egg and I are also communicating with each other about what kind of form is easier for us to accept , And our goal is to hope that everyone can gain something from our article , So this time :- Basically do not explain the original code way to explain ZK Principle - In the process of explanation, I will be empty (chui) Construction (niu) A vivid story to help you understand - Try to use popular 、 Humorous language makes the complicated knowledge points clear 、 Make it clear - Focus on pictures , Words as a supplement , Try to reduce the reading burden of readers - From time to time in the article interspersed with some I think very funny network stem 、 emoticon , Further improve the readers' interest in reading ![]( Before we start , There are two sentences I want to say in the front : The opinions in the article are not necessarily objective facts , But it's all the result of my original code , At least in me ** Subjective cognition is correct conclusion , Do your best to be responsible to the readers **. therefore , If you have any questions, please point out and discuss them , Don't leave a word :“ The garbage ” And went away . It's a sign of irresponsibility ! When I started writing this series ZK The latest version is 3.6.2, If in the process of writing ZK Ushering in a major upgrade ,** I'm afraid it's not playing with me ? The version number will not change **, For new features that are necessary , It will be introduced separately in the following single article . For fun and depth , Some of the examples cited in this article may not be accurate , It can only be said that we will try our best to get close to the facts and omit some unimportant processes at the same time , So as to reduce the reading burden of readers .## Four 、 expectation > HelloGitHub It's wonderful because of you HelloGitHub The series of products , How can it be less and GitHub The dream linkage of ? We will provide a warehouse for articles , I hope you can share the suggestions about the article or about ZK Related discussions , stay issue I'll leave you a message :> I will try my best to reply to every reader , At the same time, if there are many people who have doubts about knowledge , It will also be collected through a single article , Arrangement issue After the unified answer . Please don't be stingy with your message , Your message is likely to help other people with the same confusion , Let's put together HelloZooKeeper Build better ~ Partners at all stages , Can be added to ** The compilation and proofreading of the course ** in . Welcome :- Novice : Participate in correcting the wrong words in the text 、 A sick sentence 、 Spelling 、 Typesetting and so on - Users : Participate in content discussion and problem solving 、 Things that help other people - Old driver : Participate in the writing of the article , Make your name appear in the author column - Xiaobai who doesn't know programming : Click Star Support what we're doing !> Project address :![](** Trailer **: The next one is installation and getting started , Take you into ZooKeeper The world of . See you next week !## 5、 ... and 、 Finally, I am HelloGitHub My marinated eggs : Brother Xun is us HelloGitHub Java The leader of the technology group , He's a senior Java Programmer , Not only is the technology good 、 I love open source, and I'm humorous and humble . He often answers people's questions patiently in the group , I said that he made life by himself Java Group , He said :“ Don't say that , It's all the brothers in the group who support me !” Written by Xun Ge'er HelloZooKeeper series , From planning to releasing 2 Months of time , In order to make boring words interesting , I drew 50 Multiple pictures + And insert all kinds of interesting pictures , I believe you will like it . And to keep the series going , He finished 9 I just decided to release it , During the period, the quality of the article was constantly polished . On my proposal for amendment , He will seriously consider and adopt it while maintaining his own style of writing . The tutorial is also written in an open source and open way , It's convenient for you to contribute and implement , There will be sample projects to help you understand . The serial articles explaining technology often have no good reading numbers , but HG I'll take this series (10+ piece ) From beginning to end ! Remain true to our original aspiration , I sincerely hope that readers can learn from 《 Explain open source projects 》 Learn something , Find fun and love open source .HelloGitHub Thank you !--- Concern **HelloGitHub Public number ** Receive the first update . There are more open source projects and treasure projects waiting for you

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