TiDB 分布式数据库(二)-白红宇

# TiDB ：A Distributed SQL Database

# github :https://github.com/pingcap/tidb

# doc : https://github.com/pingcap/docs-cn

#架构

Name	Host IP	Services
node1	192.168.174.134	PD, TiDB
node2	192.168.174.136	TiKV1
node3	192.168.174.137	TiKV2
node4	192.168.174.138	TiKV3

#软件下载（每台都需操作）

                            
[root@node1 ~]
# wget http://download.pingcap.org/tidb-latest-linux-amd64.tar.gz
[root@node1 ~]
# tar -xf tidb-latest-linux-amd64.tar.gz -C /usr/local/
[root@node1 ~]
# mkdir /data/tidb/{data,log} -p
         
       

#开启服务（注：集群的启动顺序不能错）

#在node1开启PD

                            
[root@node1 ~]
# /usr/local/tidb-latest-linux-amd64/bin/pd-server --name=pd1   \
--data-
dir
=
/data/tidb/data
--client-urls=
"http://192.168.174.134:2379"
\
--peer-urls=
"http://192.168.174.134:2380"
--initial-cluster=
"pd1=http://192.168.174.134:2380"
\
--log-
file
=
/data/tidb/log/pd
.log &
         
       

参数解释：https://github.com/pingcap/docs-cn/blob/master/op-guide/configuration.md#tidb

#在node2 node3 node4 上开启 TiKV

                            
[root@node2 ~]
# /usr/local/tidb-latest-linux-amd64/bin/tikv-server --pd="192.168.174.134:2379"  --addr="192.168.174.136:20160"  --data-dir=/data/tidb/data --log-file=/data/tidb/log/tikv.log & 
[root@node3 ~]
# /usr/local/tidb-latest-linux-amd64/bin/tikv-server --pd="192.168.174.134:2379"  --addr="192.168.174.137:20160"  --data-dir=/data/tidb/data --log-file=/data/tidb/log/tikv.log &
[root@node4 ~]
# /usr/local/tidb-latest-linux-amd64/bin/tikv-server --pd="192.168.174.134:2379"  --addr="192.168.174.138:20160"  --data-dir=/data/tidb/data --log-file=/data/tidb/log/tikv.log &
         
       

参数解释：https://github.com/pingcap/docs-cn/blob/master/op-guide/configuration.md#tidb

#在node1 上开启TiDB

                            
[root@node1 ~]
# /usr/local/tidb-latest-linux-amd64/bin/tidb-server --store=tikv --path="192.168.174.134:2379" --log-file=/data/tidb/log/tidb.log &

#登陆数据库

                            
[root@node1 ~]
# yum install -y mariadb                        #安装mariadb数据库客户端
[root@node1 ~]
# mysql -uroot -h 192.168.174.134 -P 4000
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection 
id
is 2
Server version: 5.7.1-TiDB-1.0 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Type 
'help;'
or 
'\h'
for
help. Type 
'\c'
to 
clear
the current input statement.
MySQL [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| INFORMATION_SCHEMA |
| PERFORMANCE_SCHEMA |
| mysql              |
| 
test
|
+--------------------+
4 rows 
in
set
(0.00 sec)
MySQL [(none)]> 
select
host,user from mysql.user ;
+------+------+
| host | user |
+------+------+
| %    | root |
+------+------+
1 row 
in
set
(0.00 sec)
MySQL [(none)]> 
exit
Bye
         
       

#集群状态

TiDB 对外暴露的 HTTP 接口是 http://host:port/status，默认的端口号是 10080 （可以通过 --status 参数设置），

可以通过访问这个接口获取当前 TiDB Server 的状态，以及判断是否存活。返回结果是 Json 格式：

                            
[root@node1 ~]
# curl 192.168.174.134:10080/status
{ 
"connections"
:0,
"version"
:
"5.7.1-TiDB-1.0"
,
"git_hash"
:
"d6ec37bb4219e95babce41bd0400d04d84b1fb88"
}
         
       

PD Server

PD API 地址： http://${host}:${port}/pd/api/v1/${api_name}

其中 port 默认为 2379，各类 api_name 详细信息参见

https://cdn.rawgit.com/pingcap/docs/master/op-guide/pd-api-v1.html

                            
[root@node1 ~]
# curl 192.168.174.134:2379/pd/api/v1/stores
{ 
  
"count"
: 3,
  
"stores"
: [
    
{ 
      
"store"
: { 
        
"id"
: 1,
        
"address"
: 
"192.168.174.138:20160"
,
        
"state"
: 0,
        
"state_name"
: 
"Up"
      
},
      
"status"
: { 
        
"store_id"
: 1,
        
"capacity"
: 
"19 GB"
,
        
"available"
: 
"17 GB"
,
        
"leader_count"
: 1,
        
"region_count"
: 1,
        
"sending_snap_count"
: 0,
        
"receiving_snap_count"
: 0,
        
"applying_snap_count"
: 0,
        
"is_busy"
: 
false
,
        
"start_ts"
: 
"2017-05-13T03:16:51+08:00"
,
        
"last_heartbeat_ts"
: 
"2017-05-13T03:23:58.709890548+08:00"
,
        
"uptime"
: 
"7m7.709890548s"
      
}
    
},
    
{ 
      
"store"
: { 
        
"id"
: 4,
        
"address"
: 
"192.168.174.137:20160"
,
        
"state"
: 0,
        
"state_name"
: 
"Up"
      
},
      
"status"
: { 
        
"store_id"
: 4,
        
"capacity"
: 
"19 GB"
,
        
"available"
: 
"16 GB"
,
        
"leader_count"
: 0,
        
"region_count"
: 1,
        
"sending_snap_count"
: 0,
        
"receiving_snap_count"
: 0,
        
"applying_snap_count"
: 0,
        
"is_busy"
: 
false
,
        
"start_ts"
: 
"2017-05-12T18:17:02+08:00"
,
        
"last_heartbeat_ts"
: 
"2017-05-13T03:24:00.555315502+08:00"
,
        
"uptime"
: 
"9h6m58.555315502s"
      
}
    
},
    
{ 
      
"store"
: { 
        
"id"
: 5,
        
"address"
: 
"192.168.174.136:20160"
,
        
"state"
: 0,
        
"state_name"
: 
"Up"
      
},
      
"status"
: { 
        
"store_id"
: 5,
        
"capacity"
: 
"16 GB"
,
        
"available"
: 
"13 GB"
,
        
"leader_count"
: 0,
        
"region_count"
: 1,
        
"sending_snap_count"
: 0,
        
"receiving_snap_count"
: 0,
        
"applying_snap_count"
: 0,
        
"is_busy"
: 
false
,
        
"start_ts"
: 
"2017-05-12T18:17:02+08:00"
,
        
"last_heartbeat_ts"
: 
"2017-05-13T03:23:56.955220422+08:00"
,
        
"uptime"
: 
"9h6m54.955220422s"
      
}
    
}
  
]
}
[root@node1 ~]
#
         
       

本文转自 chaunceyjiang 51CTO博客，原文链接：http://blog.51cto.com/cqwujiang/1925169，如需转载请自行联系原作者