環境：
- 操作系統為ubuntu13.**版本，非長期支持版。
- 安裝目錄：/opt/redmine-2.3.1-0/
- 所有者用戶：root
安裝過程：
1. 備份2.3.1數據庫
sudo /opt/redmine-2.3.1-0/mysql/bin/mysqldump -u bitnami -p bitnami_redmine > /home/erick/redmineback/2.3.1backup.sql
2. 備份2.3.1的配置文件和files目錄（上傳文件）
cp /opt/redmine-2.3.1-0/apps/redmine/htdocs/config/database.yml /home/erick/redmineback/
cp /opt/redmine-2.3.1-0/apps/redmine/conf/redmine.conf /home/erick/redmineback/
cp /opt/redmine-2.3.1-0/apps/phpmyadmin/conf/phpmyadmin.conf /home/erick/redmineback/
cp /opt/redmine-2.3.1-0/apache2/conf/httpd.conf /home/erick/redmineback/
mkdir /home/erick/redmineback/files
cp /opt/redmine-2.3.1-0/apps/redmine/htdocs/files/* /home/erick/redmineback/files
cp /opt/redmine-2.3.1-0/apps/redmine/htdocs/public/favicon.ico /home/erick/redmineback/
3. 下載並安裝最新redmine bitnami3.2.2安裝包，目錄與之前的區分開
/opt/redmine-3.2.2-0/
4. 備份3.2.2的數據庫
sudo /opt/redmine-3.2.2-0/mysql/bin/mysqldump -u bitnami -p bitnami_redmine > /home/erick/redmineback/3.2.2backup.sql
5. 刪除並創建3.2.2的數據庫
sudo /opt/redmine-3.2.2-0/mysql/bin/mysql -u bitnami -p
DROP DATABASE bitnami_redmine;
CREATE DATABASE bitnami_redmine;
quit
6. 用2.3.1的備份數據恢復到3.2.2的數據庫中
通過phpmyadmin的導入功能實現
7. 遷移3.2.2的數據庫
cd /opt/redmine-3.2.2-0/apps/redmine/htdocs
sudo /opt/redmine-3.2.2-0/ruby/bin/ruby bin/rake db:migrate RAILS_ENV=production
8. 修改3.2.2的配置文件
設置apache，啟用gogs,修改apache參數文件:
/opt/redmine-3.2.2-0/apache2/conf/httpd.conf
在最后增加以下配置信息：
<VirtualHost *:80>
DocumentRoot "/opt/redmine-3.2.2-0/apps/redmine/htdocs/public/"
ServerName qa.yncic.com
ServerAlias qa.yncic.com
</VirtualHost>
<VirtualHost *:80>
ServerAdmin webmaster@domain.tld
ServerName git.yncic.com
ProxyRequests Off
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPass / http://localhost:3000/
ProxyPassReverse / http://localhost:3000/
</VirtualHost>
9. 拷貝files目錄到3.2.2中
sudo cp -r /opt/redmine-2.3.1-0/apps/redmine/htdocs/files/* /opt/redmine-3.2.2-0/apps/redmine/htdocs/files/
sudo chown -R daemon:daemon /opt/redmine-3.2.2-0/apps/redmine/htdocs/files/*
10. 拷貝icon圖標
sudo cp /opt/redmine-2.3.1-0/apps/redmine/htdocs/public/favicon.ico /opt/redmine-3.2.2-0/apps/redmine/htdocs/public/favicon.ico