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## 1、基本环境：
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CentOS7、libfastcommon、Berkeley、FastDHT
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## 2、安装前需要的环境gcc
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`yum install make cmake gcc gcc-c++`
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## 3、正式安装
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`cd /usr/local/src`
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```
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yum install make cmake gcc gcc-c++
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cd /usr/local/src
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``
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### ①安装libfastcommon (安装FastDFS应该已经装了。无需重复安装)
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`unzip libfastcommon-master.zip`
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`cd libfastcommon-master`
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`./make.sh && ./make.sh install`
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```
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unzip libfastcommon-master.zip
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cd libfastcommon-master
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./make.sh && ./make.sh install
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```
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### ②安装 Berkeley DB
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`wget http://download.oracle.com/berkeley-db/db-6.2.32.tar.gz`
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`cd /usr/local/src/db-6.0.30/ build_unix/`
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`chmod 777 ../dist/configure`
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`../dist/configure --prefix=/usr/local/db-6.2.32`
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`make && make install`
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```
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wget http://download.oracle.com/berkeley-db/db-6.2.32.tar.gz
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cd /usr/local/src/db-6.0.30/ build_unix/
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chmod 777 ../dist/configure
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../dist/configure --prefix=/usr/local/db-6.2.32
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make && make install
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```
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### ③安装fastDHT
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`cd /usr/local/src/`
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`git clone https://github.com/happyfish100/fastdht.git --depth 1`
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`cd fastdht-master `
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`#编译之前需要先修改make.sh文件。在大约27行修改CFLAGS为：CFLAGS='-Wall -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -I/usr/local/db-6.2.32/include/ -L/usr/local/db-6.2.32/lib/'`
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`./make.sh && ./make.sh install`
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```
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cd /usr/local/src/
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git clone https://github.com/happyfish100/fastdht.git --depth 1
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cd fastdht-master
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#编译之前需要先修改make.sh文件。在大约27行修改CFLAGS为：CFLAGS='-Wall -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -I/usr/local/db-6.2.32/include/ -L/usr/local/db-6.2.32/lib/'
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./make.sh && ./make.sh install
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```
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最后会在/usr/local/bin生成安装后的文件，在/etc/fdht下生成配置文件。
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# 二、环境配置
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## 1、创建目录
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`mkdir /fastdht`
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```
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mkdir /fastdht
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``
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## 2、修改fdhtd.conf文件
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`vim /etc/fdht/fdhtd.conf`
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`port=11411`
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`base_path=/fastdht`
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`#include /etc/fdht/fdht_servers.conf`
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```
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vim /etc/fdht/fdhtd.conf
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port=11411
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base_path=/fastdht
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#include /etc/fdht/fdht_servers.conf
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```
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## 3、修改fdht_servers.conf文件
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`vim /etc/fdht/fdht_servers.conf`
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`group_count = 2 #数字可自定义`
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`group0 = 192.168.224.223:11411`
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`group1 = 192.168.224.223:11411`
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```
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vim /etc/fdht/fdht_servers.conf
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group_count = 2 #数字可自定义
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group0 = 192.168.224.223:11411
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group1 = 192.168.224.223:11411
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```
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## 4、修改fdht_client.conf文件
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`vim /etc/fdht/fdht_client.conf`
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`keep_alive=1 #本选项关联 storaged.conf文件`
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`base_path= /fastdht `
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`#include /etc/fdht/fdht_servers.conf #注意： #和include之间没有空格）`
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```
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vim /etc/fdht/fdht_client.conf
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keep_alive=1 #本选项关联 storaged.conf文件
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base_path= /fastdht
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#include /etc/fdht/fdht_servers.conf #注意： #和include之间没有空格）
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```
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## 5、修改storage.conf文件
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`vim /etc/fdfs/storage.conf`
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```vim /etc/fdfs/storage.conf
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#是否检测上传文件已经存在。如果已经存在，则不存在文件内容，建立一个索引链接以节省磁盘空间
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`line 195: check_file_duplicate=1`
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line 195: check_file_duplicate=1
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# 当上个参数设定为1时 ， 在FastDHT中的命名空间
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`line 206: key_namespace=FastDFS`
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line 206: key_namespace=FastDFS
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#长连接配置选项，如果为0则为短连接 1为长连接
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`line 210 keep_alive=1 `
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line 210 keep_alive=1
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#可以通过 #include filename 方式来加载 FastDHT servers 的配置
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`line 217: #include /etc/fdht/fdht_servers.conf`
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line 217: #include /etc/fdht/fdht_servers.conf
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```
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三、启动FastDHT
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1、启动命令：
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```
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fdhtd /etc/fdhtd/fdhtd.conf
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```
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2、重启命令：
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```
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fdhtd /etc/fdht/fdhtd.conf restart
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```
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3、出错排查
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```
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若缺少libdb-6.0.so
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第一步：cp /usr/local/db-6.0.30/lib/libdb-6.0.so /usr/lib/
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第二步：查看动态链接库是否全链接完毕
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## ldd /usr/local/bin/fdhtd
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由图中可知缺少libdb-6.0.so
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cp /usr/local/db-6.0.30/lib/libdb-6.0.so /usr/lib/
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ldd /usr/local/bin/fdhtd
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``
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## 4、执行ldconfig命令
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ldconfig
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(ldconfig命令的用途, 主要是在默认搜寻目录(/lib和/usr/lib)以及动态库配置文件/etc/ld.so.conf内所列的目录下, 搜索出可共享的动态链接库(格式如lib*.so*), 进而创建出动态装入程序(ld.so)所需的连接和缓存文件. 缓存文件默认为/etc/ld.so.cache, 此文件保存已排好序的动态链接库名字列表)
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