【最佳实践】分布式数据库对接开源监控软件

小鱼儿 2022-05-31 03:43 319阅读 0赞

Grafana+InfluxDB+Telegraf+SequoiaDB

Grafana作为一款强大的开源的监控软件，可以进行灵活的报表定制与性能监控。用户可以通过时序数据库InfluxDB作为数据源为Grafana提供性能监控数据，同时使用Telegraf作为性能数据采集工具从SequoiaDB中定时采集性能指标，已达到准实时性能监控的目的。

整个框架的搭建非常简单，需要编写代码的仅4行，基本上可以通过合理的配置完成环境的搭建。

本文使用1台阿里云RHEL7环境，并详细标明了每一步用户需要执行的命令。

1）安装Telegraf

直接通过wget下载安装

[root@iZ2ze06q07wqluc8htj4pdZ ~]# wget https://dl.influxdata.com/telegraf/releases/telegraf-1.5.0-1.x86_64.rpm
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# yum localinstall telegraf-1.5.0-1.x86_64.rpm

2）安装InfluxDB

直接通过wget下载安装

[root@iZ2ze06q07wqluc8htj4pdZ ~]# wget https://dl.influxdata.com/influxdb/releases/influxdb-1.4.2.x86_64.rpm
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# yum localinstall influxdb-1.4.2.x86_64.rpm

3）安装Grafana

直接通过wget下载安装

[root@iZ2ze06q07wqluc8htj4pdZ ~]# wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-4.6.3-1.x86_64.rpm 
     [root@iZ2ze06q07wqluc8htj4pdZ ~]# yum localinstall grafana-4.6.3-1.x86_64.rpm

4）安装SequoiaDB

在官网注册下载SequoiaDB后解压，所有参数使用默认即可。

[root@iZ2ze06q07wqluc8htj4pdZ ~]# ./sequoiadb-2.8.4-linux_x86_64-enterprise-installer.run –SMS true

5）连接SequoiaDB SAC进行图形化安装

参考官方文档http://doc.sequoiadb.com/cn/SequoiaDB-cat\_id-1483944500-edition\_id-208

5.1）admin/admin用户名密码登录

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1][]

5.2）选择右下方一键部署

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 1][]

5.3）添加本机为主机

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 2][]

5.4）配置单节点单副本最小集群

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 3][]

5.5）确认配置点击下一步

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 4][]

5.6）启动成功

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 5][]

5.7）如果需要SQL接口可以下载并安装SequoiaSQL插件

所有安装参数均使用默认值即可。

[root@iZ2ze06q07wqluc8htj4pdZ ~]# ./sequoiasql-oltp-2.8.4-x86_64-enterprise-installer.run

5.7.1）启动SequoiaSQL服务

# 从root用户切换到sdbadmin用户
    [root@iZ2ze06q07wqluc8htj4pdZ sequoiasqloltp]# su - sdbadmin
    上一次登录：五 1月  5 13:44:47 CST 2018pts/1 上
    # 创建一个叫做testinst的实例
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ /opt/sequoiasqloltp/bin/sdb_sql_ctl addinst testinst -D /home/sdbadmin/sdb_data
    Adding instance testinst ...
    Ok
    # 启动testinst实例
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ /opt/sequoiasqloltp/bin/sdb_sql_ctl start testinst
    Starting instance testinst ...
    ok (PID: 24206)
    # 创建一个叫做testdb的数据库
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ /opt/sequoiasqloltp/bin/sdb_sql_ctl createdb testdb testinst
    Creating database testinst ...
    ok
    # 开始创建SDB集合空间与集合
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ sdb "db=new Sdb()"
    localhost:11810
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ sdb "db.createCS ('testcs')"
    localhost:11810.testcs
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ sdb "db.testcs.createCL('testcl')"
    localhost:11810.testcs.testcl
    # 创建PGSQL映射表
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ /opt/sequoiasqloltp/bin/psql -p 5432 testdb
    psql (9.3.4)
    Type "help" for help.
    # 创建Foreign Data Wrapper
    testdb=# create extension sdb_fdw;
    CREATE EXTENSION
    # 创建SequoiaDB服务
    testdb=# create server sdb_server foreign data wrapper sdb_fdw options(address '127.0.0.1', service '11810');
    CREATE SERVER
    # 创建SequoiaDB映射表，真实表存在于SequoiaDB之内
    testdb=# create foreign table test ( name text, id numeric) server sdb_server options ( collectionspace 'testcs', collection 'testcl', decimal 'on');
    CREATE FOREIGN TABLE
    # 收集一下统计信息
    testdb=# analyze test;
    ANALYZE
    # 确认表是空的
    testdb=# select * from test ;
     name | id 
    ------+----
    (0 rows)
    # 写一条数据进去
    testdb=# insert into test values('one', 1);
    INSERT 0 1
    # 试着更新一下
    testdb=# update test set id=9 where name='one';
    UPDATE 1
    # 然后查看一下
    testdb=# select * from test ;
     name | id 
    ------+----
     one  |  9
    (1 row)

5.7.2）向SAC中添加SequoiaSQL服务

点击发现业务

选择SequoiaSQL引擎

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 6][]

填入内网IP地址与端口

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 7][]

在数据中可以看到相应的表与数据

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 8][] ![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 9][]

6）验证SequoiaDB性能监控快照

# 连接数据库，验证snapshot与REST接口都是通的
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ sdb "db=new Sdb()"
    localhost:11810
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ sdb "db.snapshot(SDB_SNAP_DATABASE)"
    {
      "TotalNumConnects": 1,
      "TotalDataRead": 16187,
      "TotalIndexRead": 238,
      "TotalDataWrite": 15,
      "TotalIndexWrite": 16,
      "TotalUpdate": 8,
      "TotalDelete": 0,
      "TotalInsert": 7,
      "ReplUpdate": 0,
      "ReplDelete": 0,
      "ReplInsert": 0,
      "TotalSelect": 9706,
      "TotalRead": 9738,
      "TotalReadTime": 0,
      "TotalWriteTime": 0,
      "freeLogSpace": 1644167168,
      "vsize": 4315893760,
      "rss": 71836,
      "fault": 2,
      "TotalMapped": 1607335936,
      "svcNetIn": 761,
      "svcNetOut": 1396,
      "shardNetIn": 1564857,
      "shardNetOut": 1296727,
      "replNetIn": 0,
      "replNetOut": 0,
      "ErrNodes": []
    }
    Return 1 row(s).
    [sdbadmin@iZ2ze06q07wqluc8htj4pdZ ~]$ curl -d "cmd=snapshot database" "172.17.230.225:11814" 
    { "errno": 0 }{ "TotalNumConnects": 1.0, "TotalDataRead": 19679.0, "TotalIndexRead": 242.0, "TotalDataWrite": 15.0, "TotalIndexWrite": 16.0, "TotalUpdate": 8.0, "TotalDelete": 0.0, "TotalInsert": 7.0, "ReplUpdate": 0.0, "ReplDelete": 0.0, "ReplInsert": 0.0, "TotalSelect": 11804.0, "TotalRead": 11836.0, "TotalReadTime": 0.0, "TotalWriteTime": 0.0, "freeLogSpace": 1644167168.0, "vsize": 4315893760.0, "rss": 71842.0, "fault": 2.0, "TotalMapped": 1607335936.0, "svcNetIn": 761.0, "svcNetOut": 1396.0, "shardNetIn": 1920028.0, "shardNetOut": 1672847.0, "replNetIn": 0.0, "replNetOut": 0.0, "ErrNodes": [] }

7）启动influxdb与telegraf

# 启动influxdb服务
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# systemctl restart influxdb
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# ps -elf | grep influxdb
    4 S influxdb 22288     1  1  80   0 - 55908 futex_ 14:09 ?        00:00:00 /usr/bin/influxd -config /etc/influxdb/influxdb.conf
    0 S root     22299 18679  0  80   0 - 28169 pipe_w 14:09 pts/1    00:00:00 grep --color=auto influxdb
    # 进入influxdb并创建数据库
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# influx
    Connected to http://localhost:8086 version 1.4.2
    InfluxDB shell version: 1.4.2
    > create database "telegraf"
    > show databases
    name: databases
    name
    ----
    telegraf
    _internal
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# systemctl restart telegraf
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# ps -elf | grep telegraf
    4 S telegraf 22195     1  1  80   0 - 23463 futex_ 14:08 ?        00:00:00 /usr/bin/telegraf -config /etc/telegraf/telegraf.conf -config-directory /etc/telegra/telegraf.d
    0 S root     22206 18679  0  80   0 - 28169 pipe_w 14:08 pts/1    00:00:00 grep --color=auto telegraf
    # telegraf启动以后确认influxdb可以被正常写入监控数据
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# influx
    Connected to http://localhost:8086 version 1.4.2
    InfluxDB shell version: 1.4.2
    > use telegraf
    Using database telegraf
    > select * from cpu limit 10
    name: cpu
    time                cpu       host                    usage_guest usage_guest_nice usage_idle        usage_iowait        usage_irq usage_nice usage_softirq usage_steal usage_system        usage_user
    ----                ---       ----                    ----------- ---------------- ----------        ------------        --------- ---------- ------------- ----------- ------------        ----------
    1515132510000000000 cpu-total iZ2ze06q07wqluc8htj4pdZ 0           0                98.89834752131219 0.10015022533794657 0         0          0             0           0.35052578868309764 0.650976464697222
    1515132510000000000 cpu0      iZ2ze06q07wqluc8htj4pdZ 0           0                98.69608826480209 0.10030090270805804 0         0          0             0           0.3009027081244592  0.9027081243733776
    1515132510000000000 cpu1      iZ2ze06q07wqluc8htj4pdZ 0           0                99.09999999999854 0.09999999999990905 0         0          0             0           0.3999999999999915  0.40000000000006253

8）使用exec插件收集SequoiaDB性能指标

这里是本框架中唯一需要编写代码的地方，总共四行代码，分别为test.sh与test.js。

# 创建test.sh与test.js程序用于定期收集SequoiaDB性能指标
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# cat /tmp/test.sh
    #!/bin/sh
    /opt/sequoiadb/bin/sdb -f /tmp/test.js | sed '/Return 1/d'
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# cat /tmp/test.js
    var db = new Sdb();
    db.snapshot(SDB_SNAP_DATABASE);
    # telegraf使用自己的用户执行，因此在root下创建的脚本需要给全局执行权限
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# chmod 777 /tmp/test.sh
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# chmod 777 /tmp/test.js
     
    # 在telegraf配置中配置telegraf.conf，反注释inputs.exec并编辑相关内容
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# vi /etc/telegraf/telegraf.conf
    ……
    [[inputs.exec]]
    commands = ["/tmp/test.sh"]
    timeout = "5s"
    data_format = "json"
     
    # 验证配置文件，看到inputs.exec类型的数据确实收集了
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# telegraf --test
    2018/01/05 16:02:27 I! Using config file: /etc/telegraf/telegraf.conf
    * Plugin: inputs.mem, Collection 1
    > mem,host=iZ2ze06q07wqluc8htj4pdZ available=3092996096i,used=882089984i,buffered=66174976i,used_percent=22.190462451570358,available_percent=77.80953754842965,total=3975086080i,cached=3042557952i,active=2068545536i,inactive=1559457792i,slab=164098048i,free=133742592i 1515139347000000000
    ……
    * Plugin: inputs.exec, Collection 1
    > exec,host=iZ2ze06q07wqluc8htj4pdZ TotalUpdate=8,TotalRead=12064,TotalDataWrite=15,shardNetOut=1795359,svcNetOut=1396,replNetIn=0,TotalWriteTime=0,vsize=4525711360,replNetOut=0,TotalIndexRead=242,TotalSelect=12032,svcNetIn=761,TotalIndexWrite=16,ReplInsert=0,TotalNumConnects=1,fault=2,ReplUpdate=0,ReplDelete=0,TotalReadTime=0,TotalInsert=7,rss=72156,TotalDelete=0,TotalDataRead=20059,freeLogSpace=1644167168,shardNetIn=2034612,TotalMapped=1607335936 1515139348000000000
    * Plugin: inputs.kernel, Collection 1
    > kernel,host=iZ2ze06q07wqluc8htj4pdZ boot_time=1515116065i,processes_forked=67543i,interrupts=11615115i,context_switches=20009921i 1515139348000000000
    ……
     
    # 重启telegraf服务
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# systemctl restart telegraf
     
    # 确认数据每十秒钟录入influxdb
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# influx
    Connected to http://localhost:8086 version 1.4.2
    InfluxDB shell version: 1.4.2
    > use telegraf
    Using database telegraf
    > select * from exec
    name: exec
    time                ReplDelete ReplInsert ReplUpdate TotalDataRead TotalDataWrite TotalDelete TotalIndexRead TotalIndexWrite TotalInsert TotalMapped TotalNumConnects TotalRead TotalReadTime TotalSelect TotalUpdate TotalWriteTime fault freeLogSpace host                    replNetIn replNetOut rss   shardNetIn shardNetOut svcNetIn svcNetOut vsize
    ----                ---------- ---------- ---------- ------------- -------------- ----------- -------------- --------------- ----------- ----------- ---------------- --------- ------------- ----------- ----------- -------------- ----- ------------ ----                    --------- ---------- ---   ---------- ----------- -------- --------- -----
    1515139522000000000 0          0          0          20064         15             0           242            16              7           1607335936  1                12067     0             12035       8           0              2     1644167168   iZ2ze06q07wqluc8htj4pdZ 0         0          72156 2036130    1796971     761      1396      4525711360
    1515140020000000000 0          0          0          20069         15             0           242            16              7           1607335936  1                12070     0             12038       8           0              2     1644167168   iZ2ze06q07wqluc8htj4pdZ 0         0          72156 2037648    1798583     761      1396      4525711360

9）启动grafana

[root@iZ2ze06q07wqluc8htj4pdZ ~]# systemctl start grafana-server
    [root@iZ2ze06q07wqluc8htj4pdZ ~]# ps -elf | grep grafana
    4 S grafana   5708     1  5  80   0 - 74671 futex_ 16:57 ?        00:00:00 /usr/sbin/grafan-server --config=/etc/grafana/grafana.ini --pidfile=/var/run/grafana/grafana-server.pid cfg:default.paths.logs=/var/log/grafana cfg:default.paths.data=/var/lib/grafana cfg:default.paths.plugins=/var/lib/grafana/plugins
    0 S root      5725  1702  0  80   0 - 28169 pipe_w 16:57 pts/1    00:00:00 grep --color=auto grafana

连接3000端口可以看到

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 10][]

使用admin/admin登录后添加influxdb数据源

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 11][]

点击Save&Test通过测试

10）制定报表

在Dashboard中创建一个新的Panel，数据源选择刚刚添加的SequoiaDB，然后在指标中配置好4个指标TotalDataRead、TotalDataWrite、TotalIndexRead、TotalIndexWrite。

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 12][]

分别各做一个table和一个折线图

![640_wx_fmt_png_tp_webp_wxfrom_5_wx_lazy_1 13][]

11）小结

至此为止，我们通过使用InfluxDB与Telegraf，仅编写4行代码就将Grafana监控软件与SequoiaDB成功对接。感兴趣的读者甚至可以编写并提交针对SequoiaDB的Telegraf inputs插件，使得其他用户不需要编写脚本即可直接获得SequoiaDB的性能指标。

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微信客服：  
sequoiadb111

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