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README
Apache-2.0

分布式对象存储系统(OSS)

①描述

一款被设计为具备高可用,可伸缩型的对象存储系统,它同时还兼具自动修复和故障转移等高级特性。 这款OSS系统采用高性能语言golang开发。原生支持windows,类*linux系统的部署, 同时系统还兼容在通用的云平台环境(Kubernetes)直接部署使用。

②功能介绍

  1. ✔:提供对象上传下载功能,当前支持HTTP协议访问
  2. ✔:对象具有多版本、去重关联管理
  3. ✔:对象具有冗余分片储存功能
  4. ✔:具有后台数据自动修复功能
  5. ✔:系统具有自动再平衡数据分布
  6. ✔:客户端具有故障自动切换(元数据服务metadata故障)
  7. ✔:支持全量元数据同步

③软件架构

avatar 用户通过公网访问到前端负载均衡器ingress(traefik),由ingress直接路由apiNode服务, 把上传的对象元数据(对象大小,文件名,hash码,上传时间等) 存储到metaNode服务中,并且把相关的数据写入到datanode,datanode写成功之后, 把存储的相关元数据(存储位置,存储分片的hash码值,存储的大小等)也汇报给metaNode。 由metaNode统一来管理各个对象的元数据。

④安装和使用

开发模式

  1. 启动步骤1
     cd metanode
     go run metaserver.go
  2. 启动步骤2
    cd datanode
    go run dataserver.go
  3. 启动步骤3
    #(保证启动≥3个,代码控制了对象需要分片,默认2个分片+1个校验片,可以修改以下代码)
    cd apinode
    vim initval.go
    go run apiserver.go

k8s(v1.19.3)部署模式

  1. 一键启动服务

     # cd deploy
     # ./deployService.sh
  2. 一键删除服务

    # cd deploy
    # ./deleteService.sh

⑤备注

  • 大文件传输处理:客户端直接选择其中任何一个datanode节点的IP地址,先把大文件POST传输到datanode上面临时存放, 然后返回 该文件的sha256哈希码值和[大小(主要是为了metadata里面需要保持文件大小)] 后续再次PATCH该对象,确认真正写入成功,否则 如果在一定时间没有PATCH的话,删除该临时文件

⑥计划功能

Ⅰ. ✔修复metadataNode停止之后,datanode节点不像其他master汇报心跳
Ⅱ. ✔添加metadataNode自身元数据节点的元数据,方便dataNode和apiNode做负载均衡使用和故障容错
Ⅲ. ✔修复metadataNode挂了之后,重新启动丢失元数据数据

⑦系统文档功能

项目文档使用

#以windows系统为例,安装go doc服务(go1.12版本移除了godoc,需要手动安装)
mkdir -p $GOPATH/src/golang.org/x
cd $GOPATH/src/golang.org/x
git clone https://github.com/golang/tools.git
cd tools/command/godoc
go install
#启动go doc服务
godoc -http=:6060  -goroot="C:\xxxx\GoglandProjects\distributedObjStorage"
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