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FastDFS集群tracker是怎么样实现负载均衡的

下文给大家带来FastDFS集群tracker是怎么样实现负载均衡的,希望能够给大家在实际运用中带来一定的帮助,负载均衡涉及的东西比较多,理论也不多,网上有很多书籍,今天我们就用创新互联在行业内累计的经验来做一个解答。

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  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

FastDFS集群tracker是怎么样实现负载均衡的

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
#     
 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:

  1. 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

  2. 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

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