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FastDFS集群tracker实现负载均衡
简单介绍：
FastDFS作者余庆，是一套开源的分布式文件系统。
功能：文件存储、同步、上传、下载，提供负载均衡功能，适合用于图片、视频的存放。
角色：
tracker
作用：任务调度接受客户端的访问，检索存储节点，为客户端提供一台可用的storage。
storage
作用：接受Tracker的调度，响应客户端请求，将客户端发来的文件存储至相应存储位置，读取请求的文件，发送给客户端。
以下使用三台虚拟机搭建实验环境:
三台机器充当存储节点，其中两台配置tracker做主备关系同时充当storage角色，当一台tracker down机后另外一台可以提供正常的访问连接。
tracker01： 192.168.56.101
tracker02： 192.168.56.102
storage03：192.168.56.103
准备工作：
OS: CentoOS6.8
在所有节点上安装依赖库：
yum install -y gcc libevent libevent-doc libevent-devel libevent-headers make
所需软件包：
FastDFS_v4.06.tar.gz
fastdfs-nginx-module_v1.15.tar.gz (配置web访问时需要nginx支持此模块)
开始：第一步
[root@Master ~]# tar -xf FastDFS_v4.06.tar.gz [root@Master ~]# cd FastDFS [root@Master FastDFS]# ll total 124 drwxrwxr-x. 3 nginx nginx 4096 Feb 15 2013 client drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 common drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 conf -rw-rw-r--. 1 nginx nginx 35067 Jul 28 2008 COPYING-3_0.txt -rw-rw-r--. 1 nginx nginx 28437 Jan 24 2013 HISTORY drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 init.d -rw-rw-r--. 1 nginx nginx 7757 Dec 23 2011 INSTALL -rwxrwxr-x. 1 nginx nginx 5133 Dec 27 2012 make.sh drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 php_client -rw-rw-r--. 1 nginx nginx 2380 Jul 28 2008 README -rwxrwxr-x. 1 nginx nginx 1768 Apr 12 2010 restart.sh -rwxrwxr-x. 1 nginx nginx 1680 Apr 10 2010 stop.sh drwxrwxr-x. 4 nginx nginx 4096 Feb 15 2013 storage drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 test drwxrwxr-x. 2 nginx nginx 4096 Feb 15 2013 tracker [root@Master FastDFS]# ./make.sh && ./make.sh install [root@Master FastDFS]# cp conf/storage_ids.conf /etc/fdfs/ [root@Master FastDFS]# cp init.d/fdfs_trackerd /etc/init.d #拷贝tracker启动文件 [root@Master FastDFS]# cp init.d/fdfs_storaged /etc/init.d #拷贝storage启动文件
建议：编译前请先阅读INSTALL file
第二步：创建数据目录
mkdir -p /data/fastdfs/tracker #创建tracker文件存放路径 mkdir -p /data/fastdfs/storage #创建storage 文件存放路径 mkdir -p /data/fastdfs/client #创建client 文件存放路径
第三步：修改配置文件
[root@Master fdfs]# ll total 64 -rw-r--r--. 1 root root 1500 Jun 26 14:36 client.conf -rw-r--r--. 1 root root 858 Jun 23 15:42 http.conf -rw-r--r--. 1 root root 31172 Jun 23 15:42 mime.types -rw-r--r--. 1 root root 3898 Jun 26 15:35 mod_fastdfs.conf -rw-r--r--. 1 root root 7496 Jun 26 15:22 storage.conf -rw-r--r--. 1 root root 171 Jun 26 15:45 storage_ids.conf -rw-r--r--. 1 root root 6624 Jun 26 16:04 tracker.conf #以上目录处mod_fastdfs.conf文件外如缺少其他文件请检查 libevent 是否安装 [root@Master fdfs]# grep -vE "^#|^$" tracker.conf disabled=false bind_addr= port=22122 connect_timeout=30 network_timeout=60 base_path=/data/fastdfs/tracker max_connections=4096 work_threads=4 store_lookup=0 store_server=0 store_path=0 download_server=0 reserved_storage_space = 10% log_level=info run_by_group= run_by_user= allow_hosts=* sync_log_buff_interval = 10 check_active_interval = 120 thread_stack_size = 64KB storage_ip_changed_auto_adjust = true storage_sync_file_max_delay = 86400 storage_sync_file_max_time = 300 use_trunk_file = false slot_min_size = 256 slot_max_size = 16MB trunk_file_size = 64MB trunk_create_file_advance = false trunk_create_file_time_base = 02:00 trunk_create_file_interval = 86400 trunk_create_file_space_threshold = 20G trunk_init_check_occupying = false trunk_init_reload_from_binlog = false use_storage_id = false storage_ids_filename = storage_ids.conf id_type_in_filename = ip store_slave_file_use_link = false rotate_error_log = false error_log_rotate_time=00:00 rotate_error_log_size = 0 use_connection_pool = false connection_pool_max_idle_time = 3600 http.server_port=8080 http.check_alive_interval=30 http.check_alive_type=tcp http.check_alive_uri=/status.html #以上为配置文件内容，各参数的含义请自行了解。
cat /etc/fdfs/storage_ids.conf
[root@Master fdfs]# cat storage_ids.conf # <id> <group_name> <ip_or_hostname> 100001 group1 192.168.56.101 100002 group1 192.168.56.102 100003 group1 192.168.56.103
[root@Master fdfs]# grep -vE ‘^#|^$‘ client.conf
connect_timeout=30 network_timeout=60 base_path=/data/fastdfs/client tracker_server=192.168.56.101:22122 tracker_server=192.168.56.102:22122 log_level=info use_connection_pool = false connection_pool_max_idle_time = 3600 load_fdfs_parameters_from_tracker=false use_storage_id = false storage_ids_filename = storage_ids.conf http.tracker_server_port=8080
请在所有tracker主机修改/etc/fdfs/tracker.conf文件
请在所有storage主机修改/etc/fdfs/storage.conf文件
cat /etc/fdfs/storage.conf
[root@Master fdfs]# grep -vE "^#|^$" storage.conf disabled=false group_name=group1 bind_addr= client_bind=true port=23000 connect_timeout=30 network_timeout=60 heart_beat_interval=30 stat_report_interval=60 base_path=/data/fastdfs/storage max_connections=256 buff_size = 256KB work_threads=4 disk_rw_separated = true disk_reader_threads = 1 disk_writer_threads = 1 sync_wait_msec=50 sync_interval=0 sync_start_time=00:00 sync_end_time=23:59 write_mark_file_freq=500 store_path_count=1 store_path0=/data/fastdfs/storage subdir_count_per_path=256 tracker_server=192.168.56.101:22122 tracker_server=192.168.56.102:22122 log_level=info run_by_group= run_by_user= allow_hosts=* file_distribute_path_mode=0 file_distribute_rotate_count=100 fsync_after_written_bytes=0 sync_log_buff_interval=10 sync_binlog_buff_interval=10 sync_stat_file_interval=300 thread_stack_size=512KB upload_priority=10 if_alias_prefix= check_file_duplicate=0 file_signature_method=hash key_namespace=FastDFS keep_alive=0 use_access_log = false rotate_access_log = false access_log_rotate_time=00:00 rotate_error_log = false error_log_rotate_time=00:00 rotate_access_log_size = 0 rotate_error_log_size = 0 file_sync_skip_invalid_record=false use_connection_pool = false connection_pool_max_idle_time = 3600 http.domain_name= http.server_port=8888
第四步：启动tracker and storage
[root@Master fdfs]# /etc/init.d/fdfs_trackerd start [root@Master fdfs]# /etc/init.d/fdfs_storaged start [root@Master fdfs]# ps -ef|grep fdfs root 3157 1 0 11:55 ? 00:00:00 /usr/local/bin/fdfs_trackerd /etc/fdfs/tracker.conf root 3188 1 0 11:56 ? 00:00:00 /usr/local/bin/fdfs_storaged /etc/fdfs/storage.conf root 3217 2434 0 11:57 pts/0 00:00:00 grep fdfs [root@Master fdfs]#
注意：如果启动失败请查看日志/data/fastdfs/tracker/logs/trackerd.log
至此：tracker和storage启动完毕。
查看集群状态：
[root@Master ~]# /usr/local/bin/fdfs_monitor /etc/fdfs/storage.conf
[2017-06-27 12:02:31] DEBUG - base_path=/data/fastdfs/storage, connect_timeout=30, network_timeout=60, tracker_server_count=2, 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=2, server_index=0
tracker server is 192.168.56.101:22122
group count: 1
Group 1:
group name = group1
disk total space = 8447 MB
disk free space = 4924 MB
trunk free space = 0 MB
storage server count = 3
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 = 192.168.56.101
ip_addr = 192.168.56.101 (Master) WAIT_SYNC
http domain =
version = 4.06
join time = 2017-06-26 15:22:46
up time = 2017-06-27 11:49:39
total storage = 0 MB
free storage = 0 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
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 = 1970-01-01 08:00:00
last_source_update = 1970-01-01 08:00:00
last_sync_update = 1970-01-01 08:00:00
last_synced_timestamp = 1970-01-01 08:00:00 (never synced)
Storage 2:
id = 192.168.56.102
ip_addr = 192.168.56.102 (Minion02) ACTIVE
http domain =
version = 4.06
join time = 2017-06-26 15:12:53
up time = 2017-06-27 11:50:08
total storage = 8447 MB
free storage = 4945 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
total_upload_count = 6
success_upload_count = 6
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 = 6
success_set_meta_count = 6
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 = 63284
success_upload_bytes = 63284
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 = 120
success_sync_in_bytes = 120
total_sync_out_bytes = 240
success_sync_out_bytes = 240
total_file_open_count = 10
success_file_open_count = 10
total_file_read_count = 0
success_file_read_count = 0
total_file_write_count = 10
success_file_write_count = 10
last_heart_beat_time = 2017-06-27 12:02:14
last_source_update = 2017-06-27 12:01:01
last_sync_update = 2017-06-26 15:55:03
last_synced_timestamp = 1970-01-01 08:00:00 (never synced)
Storage 3:
id = 192.168.56.103
ip_addr = 192.168.56.103 (Minion03) WAIT_SYNC
http domain =
version = 4.06
join time = 2017-06-26 15:14:03
up time = 2017-06-27 11:50:25
total storage = 8447 MB
free storage = 4924 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= 192.168.56.102
if_trunk_server= 0
total_upload_count = 2
success_upload_count = 2
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 = 2
success_set_meta_count = 2
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 = 22
success_upload_bytes = 22
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 = 995
success_sync_in_bytes = 240
total_sync_out_bytes = 120
success_sync_out_bytes = 120
total_file_open_count = 10
success_file_open_count = 10
total_file_read_count = 0
success_file_read_count = 0
total_file_write_count = 10
success_file_write_count = 10
last_heart_beat_time = 2017-06-27 12:02:10
last_source_update = 2017-06-26 15:54:52
last_sync_update = 2017-06-26 16:04:33
last_synced_timestamp = 1970-01-01 08:00:00 (never synced)
测试：
上传文件至FastDFS，上传多个文件至storage查看上传位置是否有变化
停掉tracker01 查看是否切换至tracker02
上传文件：
[root@Master ~]# /usr/local/bin/fdfs_test /etc/fdfs/client.conf upload install.log
至此：end
如有问题欢迎留言探讨。。。。3Q
本文出自 “蜗牛的嘲讽” 博客，请务必保留此出处http://imork.blog.51cto.com/11642843/1942342
FastDFS集群tracker实现负载均衡