nginx反向代理失败，又是 fastdfs 的锅

fdfs问题记录

[root@hostcad logs]# systemctl status fdfs_trackerd.service 
● fdfs_trackerd.service - LSB: FastDFS tracker server
   Loaded: loaded (/etc/rc.d/init.d/fdfs_trackerd; bad; vendor preset: disabled)
   Active: active (running) since Fri 2020-07-31 14:53:06 CST; 5min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 17024 ExecStop=/etc/rc.d/init.d/fdfs_trackerd stop (code=exited, status=3)
  Process: 17032 ExecStart=/etc/rc.d/init.d/fdfs_trackerd start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/fdfs_trackerd.service
           └─17038 /usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf

Jul 31 14:53:06 hostcad systemd[1]: Starting LSB: FastDFS tracker server...
Jul 31 14:53:06 hostcad fdfs_trackerd[17032]: Starting FastDFS tracker server:
Jul 31 14:53:06 hostcad systemd[1]: Started LSB: FastDFS tracker server.

这里可以看出，对应的启动文件在：

/etc/rc.d/init.d/fdfs_trackerd

从该文件，可以看到：

#!/bin/bash
#
# fdfs_trackerd Starts fdfs_trackerd
#
#
# chkconfig: 2345 99 01
# description: FastDFS tracker server
### BEGIN INIT INFO
# Provides: $fdfs_trackerd
### END INIT INFO

# Source function library.
if [ -f /etc/init.d/functions ]; then
  . /etc/init.d/functions
fi

PRG=/usr/bin/fdfs_trackerd
CONF=/etc/fdfs/tracker.conf

配置文件为/etc/fdfs/tracker.conf。

# is this config file disabled
# false for enabled
# true for disabled
disabled=false

# bind an address of this host
# empty for bind all addresses of this host
bind_addr=

# the tracker server port
port=22122

# connect timeout in seconds
# default value is 30s
connect_timeout=10

# network timeout in seconds
# default value is 30s
network_timeout=60

#1  the base path to store data and log files
base_path=/home/fastdfs/tracker

从上面1处，得知其数据和日志的路径。

[root@hostcad logs]# cd /home/fastdfs/tracker
[root@hostcad tracker]# ll
total 0
drwxr-xr-x. 2 root root 178 Jul 31 14:53 data
drwxr-xr-x. 2 root root  26 Jul 31 14:58 logs
[root@hostcad tracker]# tree .
.
├── data
│?? ├── fdfs_trackerd.pid
│?? ├── storage_changelog.dat
│?? ├── storage_groups_new.dat
│?? ├── storage_servers_new.dat
│?? └── storage_sync_timestamp.dat
└── logs
    └── trackerd.log

2 directories, 6 files
[root@hostcad tracker]# 

拿到日志路径后，我们看看日志中有没有报错：

[2020-07-30 11:49:08] ERROR - file: tracker_mem.c, line: 1493, the format of the file "/home/fastdfs/tracker/data/storage_sync_timestamp.dat" is invalid, group_name: group1, colums: 5 > 4

我们拿着这个错误去搜索一下，发现了以下链接：

https://www.cnblogs.com/jaredzhuo/articles/7365153.html

https://blog.csdn.net/sinat_23678421/article/details/43955721?utm_source=blogxgwz0

根据文章中的方法：

Q： 在tracker的日志里报出此类错误
ERROR - file: tracker_mem.c, line: 1406, the format of the file "/home/bstar/dfs_data/data/storage_sync_timestamp.dat" is invalid, group: group3, row count:1 > server count:0

A：修改data里面的 storage_sync_timestamp.dat，把group3的信息删掉，然后重启tracker

删掉文件里的内容，然后重启tracker，就ok了。