group1满了，增加group2
建议设置的时候，把tracker.conf中的reserved_storage_space调大点，比如10%，如果监控到满了，可以减少这个参数，比如改成2%暂时先顶一顶

一、服务配置
上传服务（tracker）
x.x.27.101
x.x.27.104

fastdfs group1（storage）
x.x.27.99
x.x.27.100

fastdfs group2（storage）
x.x.27.26

storage
/etc/fdfs/
------storage.conf
------http.conf
------mime.types
------mod_fastdfs.conf

tracker
/etc/fdfs/
------tracker.conf
------client.conf
------storage_ids.conf

二、27.26相关软件的安装步骤
0、安装相关依赖
yum install libevent gd-devel libcurl-devel
1、安装libfastcommon.tar.gz
1)make.sh clean
2)make.sh
3)make.sh install
2、安装FastDFS_v5.04.tar.gz
1)make.sh clean
2)make.sh
3)make.sh install
3、安装ngx_openresty-1.9.3.2
1)解压ngx_openresty-1.9.3.2
2)解压fastdfs-nginx-module到ngx_openresty-1.9.3.2目录下
3)将fastdfs-nginx-module/src/*拷贝到fastdfs-nginx-module下
4)编辑fastdfs-nginx-module/config文件，替换目录CORE_INCS="$CORE_INCS /usr/include/fastdfs /usr/include/fastcommon/"
5)./configure --with-luajit --add-module=./fastdfs-nginx-module
6)gmake & gmake install

三、配置
1）nginx.conf（27.26）
location /group2/M00 {
    alias /home/fastdfs/storage/data;
    ngx_fastdfs_module;
}

2)storage.conf（27.26）
tracker_server=x.x.27.101:22122
tracker_server=x.x.27.104:22122

3)mod_fastdfs.conf（27.26）
tracker_server=x.x.27.101:22122
tracker_server=x.x.27.104:22122

4）tracker.conf（27.101和27.104）
# the method of selecting group to upload files
# 0: round robin
# 1: specify group
# 2: load balance, select the max free space group to upload file
store_lookup=1

# which group to upload file
# when store_lookup set to 1, must set store_group to the group name
store_group=group2

四、上传命令
/usr/bin/fdfs_upload_file /etc/fdfs/client.conf $1

五、管理命令
--重启
/usr/bin/restart.sh /usr/bin/fdfs_storaged /etc/fdfs/storage.conf
/usr/bin/restart.sh /usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf

--停止
/usr/bin/stop.sh /usr/bin/fdfs_storaged /etc/fdfs/storage.conf
/usr/bin/stop.sh /usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf

--启动
/usr/bin/fdfs_storaged /etc/fdfs/storage.conf
/usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf

--查看日志
tail -f -n 100 /home/fastdfs/storage/logs/storaged.log 
tail -f -n 100 /home/fastdfs/tracker/logs/trackerd.log 

--监控
/usr/bin/fdfs_monitor /etc/fdfs/storage.conf