Pallas

Curator is to Zookeeper what Pallas is to Elasticsearch.

                  --Dylan.Xue

Pallas, the VIP.com's uniform search platform, built on top of the elasticsearch, aiming to solve all kinds of search-problem, such as full-text search with scoring, database sharding search, big-data search, complex aggregation search along with performance, scalability and high avaliability required, which are hard to sovled by the tradition SQL or NoSQL database. Shinning features include:

• ES visualization management & monitoring tools based on Cerebro, bigdesk, sense. You can get them all by visiting http://localhost:8081.
• ES search template management based on index level.
  • CURD, render and debug the templates.
  • Import and export.
  • Include syntax, highlighting, json fromat.
  • Review process required before taking effect.
  • Version comparing.
  • Template canary.
• Deep integration between MySQL and ES.
  • Field Mapping auto generated based on MySQL schema.
  • Generate DSL via elasticsearch-sql.
  • Data-sync from DB to ES, including full-import/checking/binlog-based incremental update.(base on saturn and rdp, to be open)
• ES http-protocol proxy.
  • Netty-based application with filter-chain pattern.
  • Service governance: index routing/timeout/retry/flow-record/slow log/index and template canary/toke-based authorization.
  • Together with Client-SDK provides you with load balance/failover abilities.
• Pallas ES-plugin updated without a restarat.
  • Extends from AbstractSearchScript.
  • Each plugin has its own classloader.
  • Thorough class loading & unloading.
• Pallas Console
  • ES clusters management.
  • Index management.
  • Tempalate review process.
  • ES-proxy management(metrisc/offline & online).
  • Token management.
  • Pallas plugin management.

Pallas是唯品会统一的检索平台，基于ElasticSearch深度定制，解决关系数据库和NOSQL均无法有效处理的文本检索打分，模糊查询，数据多关键字组合查询，聚合等问题场景。 功能包括:

• ES可视化管理监控，基于Cerebro，bigdesk，sense。通过访问http://localhost:8081 就能全拥有了。
• ES模板管理，基于索引粒度
  • 增删改查、渲染DSL、在线调试
  • 批量导入导出
  • include语法， json 美化，高亮语法
  • 模板审核机制，灰度上线
  • 新旧版本对比
• 深度整合MySQL和ES
  • 基于db schema自动生成Field mapping
  • 通过elasticsearch-sql自动转化SQL到ES DSL。
  • 数据同步（全量、对账、增量），基于saturn 和 rdp，这块很快会开源。
• ES http协议代理
  • 基于netty和filter链模式代理http请求
  • 完善的服务治理：路由、超时重试、流量录制、索引和模板灰度、基于token的鉴权
  • 配合使用client-sdk，能做到负载均衡、自动容错
• Pallas的ES插件，线上热插拔
  • Extends from AbstractSearchScript
  • 独立的classloader设计
  • 完善的class加载和卸载
• Pallas Console管理控制台
  • ES集群管理
  • 代理管理(监控指标、上线下线）
  • token管理
  • 模板审核流程
  • 插件管理

Main modules 主要模块

Modules	Functionalities
pallas-es	基于ES 5.5.2 增加在线升级、在线重启插件 提供rpm包，一键安装
pallas-index 尚未开源	同步数据模块，包括全量、增量、对账 同步状态检测
pallas-search	ES http代理层 服务治理：鉴权、路由、超时重试、流量复制、模板灰度、别名灰度等
pallas-console	索引管理：管理索引、管理模板、管理版本、流量录制、路由管理、服务治理、索引操作记录等等 集群管理：管理ES集群，集成cerebro可视化管理系统，集成bigdesk可视化监控 权限管理：基于token的授权方式 代理管理：上线/下线代理，实时查看qps/流量记录/连接数
pallas-client	基于ES rest client 自动负载均衡 超时重试 可配置直连ES还是经过proxy

Pallas architecture

How it looks

Quick Start

Visit http://localhost:8081 after running the following command, make sure you have >=jdk8 installed.

cd quickstart
java -Dfile.encoding=UTF-8 -jar pallas-demo.jar  
(或者运行：sh quickstart.sh)

Click here for more details: Quick Start

Contributing

Pallas官方微信讨论群，请搜索微信号viptech128(唯技术)，添加好友（备注Pallas开源交流）后加入。

所有报Bug、建议与咨询，请在Issue发起；所有代码提交，请走Pull Request流程。

对于优秀的代码提交和建议，唯品会将不吝发挥电商本色，给予vip.com购物卡的奖励 ！！！

Documents

Get Started

Team members

• Architect & Dev Leader: Dylan Xue (dylan_xueke@hotmail.com)
• Developer: Chembo Huang (chemboking@qq.com)
• Developer: Jamin Li (jaminlai@163.com)
• Developer: Owen Li (owen.li.zhihao@gmail.com)
• Developer: Tanner Cai (tannercai@hotmail.com)
• Developer: Haiming Wang (haiming.wang@outlook.com)
• Tester: yy.xu (yongyong68@qq.com)
• Front end: Gier Cai (782830164@qq.com)