1 - 前言
Code Review 代码评审是指在软件开发过程中，对源代码的系统性检查，改进代码质量，查找系统缺陷，保证软件总体质量和提高开发者自身水平。
简单的说，Code Review是用来确认方案设计和代码实现的质量保证机制。
2 - Gerrit简介
Gerrit 是建立在Git版本控制系统之上并且基于Web的一个免费开源的轻量级代码审查工具。
作为开发者和Git之间的一层屏障，不允许直接将本地修改内容同步到远程仓库中。
与Jenkins集成后，可以在每次提交代码后，人工审核代码前，通过Jenkins任务自动运行单元测试、构建以及自动化测试，如果Jenkins任务失败，会自动打回本次提交。
一般Git、Gerrit和Jenkins集成后的使用流程
1.开发者提交代码到Gerrit
2.触发对应的Jenkins任务，通过以后Verified加1
3.人工审核，审核通过后code review加2，触发对应的Jenkins任务
4.通过以后确认本次提交，Gerrit执行与Git仓库的代码同步操作
5.代码进入Git仓库
2.1 官网信息
HomePage：https://www.gerritcodereview.com/
Downloads：https://gerrit-releases.storage.googleapis.com/index.html
Docs：https://gerrit-review.googlesource.com/Documentation/
Quickstart：https://gerrit-review.googlesource.com/Documentation/linux-quickstart.html
Issues List：https://bugs.chromium.org/p/gerrit/issues/list
2.2 Training Slides
The following slides explain Git and Gerrit concepts and workflows and are meant for self-studying how Git and Gerrit work:
Git explained: Git Concepts and Workflows：https://docs.google.com/presentation/d/1IQCRPHEIX-qKo7QFxsD3V62yhyGA9_5YsYXFOiBpgkk/
Gerrit explained: Gerrit Concepts and Workflows：https://docs.google.com/presentation/d/1C73UgQdzZDw0gzpaEqIC6SPujZJhqamyqO1XOHjH-uk/
3 - 安装准备
3.1 Linux、Java、Git
[Anliven@mt101 ~]$ cat /etc/system-release
CentOS Linux release 7.5.1804 (Core)
[Anliven@mt101 ~]$ uname -a
Linux mt101 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[Anliven@mt101 ~]$ java -version
openjdk version "1.8.0_161"
OpenJDK Runtime Environment (build 1.8.0_161-b14)
OpenJDK 64-Bit Server VM (build 25.161-b14, mixed mode)
[Anliven@mt101 ~]$ git --version
git version 1.8.3.1
3.2 创建Gerrit账户
[Anliven@mt101 ~]$ sudo adduser gerrit
[Anliven@mt101 ~]$ sudo passwd gerrit
Changing password for user gerrit.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[Anliven@mt101 ~]$ su - gerrit
Password:
[gerrit@mt101 ~]$ git config --global core.quotepath false
[gerrit@mt101 ~]$ git config --global i18n.logoutputencoding utf8
[gerrit@mt101 ~]$ git config --global i18n.commitencoding utf8
[gerrit@mt101 ~]$ git config --list
core.quotepath=false
i18n.logoutputencoding=utf8
i18n.commitencoding=utf8
[gerrit@mt101 ~]$ exit
logout
[Anliven@mt101 ~]$ sudo cat /etc/sudoers |grep gerrit
gerrit ALL=(ALL) NOPASSWD: ALL
4 - Gerrit安装
4.1 官网信息
https://gerrit-releases.storage.googleapis.com/gerrit-3.1.0.war
https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.0/index.html
Quickstart for Installing Gerrit on Linux：https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.0/linux-quickstart.html
4.2 安装并启动
- 将下载好的gerrit-3.1.0.war拷贝至服务器的
/home/gerrit目录下 su - gerrit切换至gerrit用户，并执行安装运行命令
[gerrit@vm192-168-2-77 ~]$ java -jar gerrit-3.1.0.war init -d ~/gerrit-review
将会逐个出现配置选项，填写如下选项配置，其余默认。
Authentication method [openid/?]: HTTP
Listen on address [*]: 192.168.16.101
Listen on port [8080]: 8083
后续可以通过配置文件（/home/gerrit/gerrit-review/etc/gerrit.config）来更新配置。
[gerrit@vm192-168-2-77 ~]$ java -jar gerrit-3.1.0.war init -d ~/gerrit-review
Using secure store: com.google.gerrit.server.securestore.DefaultSecureStore
[2021-04-06 16:16:30,271] [main] INFO com.google.gerrit.server.config.GerritServerConfigProvider : No /home/gerrit/gerrit-review/etc/gerrit.config; assuming defaults
*** Gerrit Code Review 3.1.0
***
Create '/home/gerrit/gerrit-review' [Y/n]? y
*** Git Repositories
***
Location of Git repositories [git]: git
*** Index
***
Type [lucene]:
*** User Authentication
***
Authentication method [openid/?]: HTTP
Get username from custom HTTP header [y/N]?
SSO logout URL :
Enable signed push support [y/N]?
*** Review Labels
***
Install Verified label [y/N]?
*** Email Delivery
***
SMTP server hostname [localhost]:
SMTP server port [(default)]:
SMTP encryption [none/?]:
SMTP username :
*** Container Process
***
Run as [gerrit]:
Java runtime [/usr/local/java/jdk1.8.0_211/jre]:
Copy gerrit-3.1.0.war to /home/gerrit/gerrit-review/bin/gerrit.war [Y/n]?
Copying gerrit-3.1.0.war to /home/gerrit/gerrit-review/bin/gerrit.war
*** SSH Daemon
***
Listen on address [*]:
Listen on port [29418]:
Generating SSH host key ... rsa... ed25519... ecdsa 256... ecdsa 384... ecdsa 521... done
*** HTTP Daemon
***
Behind reverse proxy [y/N]?
Use SSL (https://) [y/N]?
Listen on address [*]:
Listen on port [8080]: 8083
Canonical URL [http://vm192-168-2-77:8083/]:
*** Cache
***
*** Plugins
***
Installing plugins.
Install plugin codemirror-editor version v3.1.0 [y/N]?
Install plugin commit-message-length-validator version v3.1.0 [y/N]?
Install plugin delete-project version v3.1.0 [y/N]?
Install plugin download-commands version v3.1.0 [y/N]?
Install plugin gitiles version v3.1.0 [y/N]?
Install plugin hooks version v3.1.0 [y/N]?
Install plugin plugin-manager version v3.1.0 [y/N]?
Install plugin replication version v3.1.0 [y/N]?
Install plugin reviewnotes version v3.1.0 [y/N]?
Install plugin singleusergroup version v3.1.0 [y/N]?
Install plugin webhooks version v3.1.0 [y/N]?
Initializing plugins.
No plugins found with init steps.
Initialized /home/gerrit/gerrit-review
Reindexing projects: 100% (2/2) with: reindex --site-path /home/gerrit/gerrit-review --threads 1 --index projects
Reindexed 2 documents in projects index in 0.1s (33.3/s)
Executing /home/gerrit/gerrit-review/bin/gerrit.sh start
Starting Gerrit Code Review: WARNING: Could not adjust Gerrit's process for the kernel's out-of-memory killer.
This may be caused by /home/gerrit/gerrit-review/bin/gerrit.sh not being run as root.
Consider changing the OOM score adjustment manually for Gerrit's PID=30522 with e.g.:
echo '-1000' | sudo tee /proc/30522/oom_score_adj
OK
Waiting for server on vm192-168-2-77:8083 ... OK
Opening http://vm192-168-2-77:8083/#/admin/projects/ ...FAILED
Open Gerrit with a JavaScript capable browser:
http://vm192-168-2-77:8083/#/admin/projects/