分布式文件系统 - FastDFS 在 CentOS 下配置安装部署
按照该博主的介绍，大部分安装操作正常，只是在创建软连接的时候报错。
所以只好用笨办法启动和关闭：
启动tracker：
/usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf start
启动storage：
/usr/bin/fdfs_storaged /etc/fdfs/storage.conf start
关闭 stop 重启 restart。
查看启动状态：
root@VM-0-17-ubuntu:/usr/local/bin# /usr/bin/fdfs_monitor /etc/fdfs/storage.conf
[2018-04-22 14:58:14] DEBUG - base_path=/data/fastdfs/storage, connect_timeout=30, network_timeout=60, tracker_server_count=1, anti_steal_token=0, anti_steal_secret_key length=0, use_connection_pool=0, g_connection_pool_max_idle_time=3600s, use_storage_id=0, storage server id count: 0
server_count=1, server_index=0
tracker server is 111.231.73.14:22122
group count: 1
Group 1:
group name = group1
disk total space = 50267 MB
disk free space = 44322 MB
trunk free space = 0 MB
storage server count = 1
active server count = 1
storage server port = 23000
storage HTTP port = 8888
store path count = 1
subdir count per path = 256
current write server index = 0
current trunk file id = 0
Storage 1:
id = 111.231.73.14
ip_addr = 111.231.73.14 ACTIVE
http domain =
version = 5.05
join time = 2018-04-22 14:57:29
up time = 2018-04-22 14:57:29
total storage = 50267 MB
free storage = 44322 MB
upload priority = 10
store_path_count = 1
subdir_count_per_path = 256
storage_port = 23000
storage_http_port = 8888
current_write_path = 0
source storage id =
if_trunk_server = 0
connection.alloc_count = 256
connection.current_count = 1
connection.max_count = 1
total_upload_count = 0
success_upload_count = 0
total_append_count = 0
success_append_count = 0
total_modify_count = 0
success_modify_count = 0
total_truncate_count = 0
success_truncate_count = 0
total_set_meta_count = 0
success_set_meta_count = 0
total_delete_count = 0
success_delete_count = 0
total_download_count = 0
success_download_count = 0
total_get_meta_count = 0
success_get_meta_count = 0
total_create_link_count = 0
success_create_link_count = 0
total_delete_link_count = 0
success_delete_link_count = 0
total_upload_bytes = 0
success_upload_bytes = 0
total_append_bytes = 0
success_append_bytes = 0
total_modify_bytes = 0
success_modify_bytes = 0
stotal_download_bytes = 0
success_download_bytes = 0
total_sync_in_bytes = 0
success_sync_in_bytes = 0
total_sync_out_bytes = 0
success_sync_out_bytes = 0
total_file_open_count = 0
success_file_open_count = 0
total_file_read_count = 0
success_file_read_count = 0
total_file_write_count = 0
success_file_write_count = 0
last_heart_beat_time = 2018-04-22 14:58:07
last_source_update = 1970-01-01 08:00:00
last_sync_update = 1970-01-01 08:00:00
测试，上传一个图片：
/usr/bin/fdfs_test /etc/fdfs/client.conf upload /home/apache-tomcat-8.5.28/webapps/myinvoice/11.jpg
上传结果：
http://111.231.73.14/group1/M00/00/00/rBEAEVrcMrGAAWbeAAEK0T_vltA970_big.jpg
然后是安装nginx，分布式文件系统 - FastDFS 配置 Nginx 模块及上传测试
有几处需要注意的地方:
1.下载fastdfs-nginx-module，按照博主的方式下载下来在make 操作nginx时报错:所以我下了linux版本的压缩包,
https://download.csdn.net/download/zgf19930504/9574275,在解压缩之后，记得要修改（你的保存路径）/src下的config文件内容为:
ngx_addon_name=ngx_http_fastdfs_module
HTTP_MODULES="$HTTP_MODULES ngx_http_fastdfs_module"
NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_fastdfs_module.c"
CORE_INCS="$CORE_INCS /usr/include/fastdfs /usr/include/fastcommon/"
CORE_LIBS="$CORE_LIBS -L/usr/local/lib -lfastcommon -lfdfsclient"
CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=64 -DFDFS_OUTPUT_CHUNK_SIZE='256*1024' -DFDFS_MOD_CONF_FILENAME='\"/etc/fdfs/mod_fastdfs.conf\"'"
2.在启动nginx时报错:/usr/local/nginx/sbin/nginx: error while loading shared libraries: libfastcommon.so: cannot open shared object file: No such file or directory.
可以创建软连接http://blog.itpub.net/7734666/viewspace-1292485/,或者直接拷贝/usr/lib64下的libfastcommon.so文件和
libfdfsclient.so文件到/usr/local/lib和/usr/lib目录下。然后再次启动nginx，如果现实PID则正常：
ngx_http_fastdfs_set pid=18468
可是我在访问nginx却打不开欢迎页。。。
找到nginx日志位置：
/usr/local/nginx/logs
查看错误日志：
fastdfs_process_init pid=24318
[2018-04-22 19:32:02] ERROR - file: shared_func.c, line: 960, open file /etc/fdfs/mod_fastdfs.conf fail, errno: 13, error info: Permission denied
[2018-04-22 19:32:02] ERROR - file: ../fastdfs-nginx-module/src//common.c, line: 155, load conf file "/etc/fdfs/mod_fastdfs.conf" fail, ret code: 13
2018/04/22 19:32:02 [alert] 24317#0: worker process 24318 exited with fatal code 2 and cannot be
意思是说没有权限操作:/etc/fdfs/mod_fastdfs.conf
执行：
chmod 777 mod_fastdfs.conf
重启nginx，可以正常登陆欢迎页！
nginx正常启动后，尝试保存图片:
/usr/bin/fdfs_test /etc/fdfs/client.conf upload /home/apache-tomcat-8.5.28/webapps/myinvoice/11.jpg
保存结果:
This is FastDFS client test program v5.05
Copyright (C) 2008, Happy Fish / YuQing
FastDFS may be copied only under the terms of the GNU General
Public License V3, which may be found in the FastDFS source kit.
Please visit the FastDFS Home Page http://www.csource.org/
for more detail.
[2018-04-24 10:50:57] DEBUG - base_path=/data/fastdfs, connect_timeout=30, network_timeout=60, tracker_server_count=1, anti_steal_token=0, anti_steal_secret_key length=0, use_connection_pool=0, g_connection_pool_max_idle_time=3600s, use_storage_id=0, storage server id count: 0
tracker_query_storage_store_list_without_group:
server 1. group_name=, ip_addr=111.231.73.14, port=23000
group_name=group1, ip_addr=111.231.73.14, port=23000
storage_upload_by_filename
group_name=group1, remote_filename=M00/00/00/rBEAEVrem5GAfYlSAAEK0T_vltA102.jpg
source ip address: 172.17.0.17
file timestamp=2018-04-24 10:50:57
file size=68305
file crc32=1072666320
example file url: http://111.231.73.14/group1/M00/00/00/rBEAEVrem5GAfYlSAAEK0T_vltA102.jpg
storage_upload_slave_by_filename
group_name=group1, remote_filename=M00/00/00/rBEAEVrem5GAfYlSAAEK0T_vltA102_big.jpg
source ip address: 172.17.0.17
file timestamp=2018-04-24 10:50:57
file size=68305
file crc32=1072666320
example file url: http://111.231.73.14/group1/M00/00/00/rBEAEVrem5GAfYlSAAEK0T_vltA102_big.jpg
但是在浏览器上打开生成的url，报404.。。
找到nginx的日志:
/usr/local/nginx/logs
发现错误原因为：
ERROR - file: ../fastdfs-nginx-module/src//common.c, line: 877,
stat file: /data/fastdfs/storage/data/00/00/rBEAEVrdUnmAf3GgAAEK0T_vltA352_big.jpg fail,
errno: 13, error info: Permission denied
解决方式：
找到nginx的安装路径:
/usr/local/nginx/conf
修改nginx.conf，在开始位置加上:
user root;
保存，重启nginx,再次访问url地址,可以正常访问！
如果是在云服务器上测试，在安全组内把80,22122,23000,9000这些端口都要打开
