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作者:陈怡
爱可生南分团队 DBA,负责公司自动化运维平台保护和解决客户问题。
本文起源:原创投稿
* 爱可生开源社区出品,原创内容未经受权不得随便应用,转载请分割小编并注明起源。
前言
DTLE 是开源的数据传输组件,反对 MySQL 多种应用场景的数据传输。可能会遇到这样的场景,将数据传输到目标端时,目标端的库名想要与源端的库名不一样。或者传输到目标端时,库名与源端的一样,然而想重命名表名与源端的不同。本文将简略介绍 DTLE 如何设置满足这样的场景。
装置部署
1、3.21.10.0 版本 rpm 包下载地址
https://github.com/actiontech/dtle/releases/download/v3.21.10.1/dtle-ce-3.21.10.1.x86_64.rpm
2、装置
rpm -ivh dtle-ce-3.21.10.1.x86_64.rpm --prefix=/data/dtle
装置实现后,dtle 的相干日志会位于 /data/dtle/var/log 目录下
3、启动 dtle
systemctl start dtle-consul dtle-nomad
启动 dtle 之后,咱们就能够创立工作来实现咱们的数据传输了。
测试环境筹备
1、筹备两个 5.7 版本的 MySQL 实例,别离用作源端和目标端数据库。
2、在源库,创立测试数据如下
mysql> create database dtle_d1;
Query OK, 1 row affected (0.00 sec)
mysql> use dtle_d1
Database changed
mysql> create table dtle_t1(id int,name varchar(20),PRIMARY KEY(id));
Query OK, 0 rows affected (0.02 sec)
mysql> insert into dtle_t1 values (1,'xiaoming'),(2,'xiaohong'),(3,'xiaofang');
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from dtle_t1;
+----+----------+
| id | name |
+----+----------+
| 1 | xiaoming |
| 2 | xiaohong |
| 3 | xiaofang |
+----+----------+
3 rows in set (0.00 sec)
mysql> create database dtle_db2;
Query OK, 1 row affected (0.01 sec)
mysql> use dtle_db2
Database changed
mysql> create table dtle_table2(id int,name varchar(20),tag varchar(20),PRIMARY KEY(id));
Query OK, 0 rows affected (0.01 sec)
mysql> insert into dtle_table2 values(1,'mao','0'),(2,'gou','0'),(3,'tu',0),(4,'shu','0'),(5,'yu','0');
Query OK, 5 rows affected (0.00 sec)
Records: 5 Duplicates: 0 Warnings: 0
mysql> select * from dtle_table2;
+----+------+------+
| id | name | tag |
+----+------+------+
| 1 | mao | 0 |
| 2 | gou | 0 |
| 3 | tu | 0 |
| 4 | shu | 0 |
| 5 | yu | 0 |
+----+------+------+
5 rows in set (0.00 sec)
3、装置 jq 工具以不便在 Linux 上查问工作状态。此为可选项,非必选项。
yum install jq -y
实现数据传输
在启动 dtle 组件后,先创立作业配置,而后启动作业,就能够实现通过 dtle 实现 MySQL 到 MySQL 的数据传输。作业配置个别采纳 json (HTTP API 提交) 或 hcl (nomad 命令行工具提交) 文件。对应文件的样例模板位于 /data/dtle/usr/share/dtle/scripts 目录下。本文将介绍采纳 HTTP API 提交 json 文件 配置的形式启动 job 实现数据传输。
场景一:1、实现将源端 dtle_d1 库数据传输到目标端时,目标端库名批改为 dtle_d1_new,表名不变。创立 /data/dtle/usr/share/dtle/scripts/job1.json 文件如下:
{
"Job": {
"ID": "job1", # 指定 job id,查看 job 状态时须要用到该 id
"Datacenters": ["dc1"],
"TaskGroups": [
{
"Name": "src",
"Tasks": [{
"Name": "src",
"Driver": "dtle",
"Config": {
"ReplicateDoDb": [{ # 指定复制的库名 / 表名,当该配置为空时,则复制整个实例
"TableSchema": "dtle_d1", # 指定复制的库名
"TableSchemaRename": "dtle_d1_new" # 设置库复制到目标端时,新的数据库名
}],
"GroupMaxSize": 1024, # 源端发送数据时, 期待数据包达到肯定大小后发送该包. 单位为字节. 值为 1 时则示意即刻发送数据
"GroupTimeout": 100, # 期待包超时工夫。如果期待指定工夫后,数据包大小还未达到 GroupMaxSize 值,则间接发送以后数据包
"DropTableIfExists": true,
"Gtid": "", # 1、为空时,则全量 + 增量进行复制。2、填写为已复制的 GTID 汇合, 则将从未复制的 GTID 开始增量复制"ChunkSize": 2000, # 能够管制全量复制时,每次读取 - 传输 - 写入的行数"ConnectionConfig": {# 配置拜访源端的形式,ip、端口、用户名、明码"Host":"10.186.65.16","Port": 3316,"User":"root","Password":"root"}
}
}],
"RestartPolicy": {
"Attempts": 3,
"Interval": 600000000000,
"Delay": 15000000000,
"Mode": "delay"
}
}, {
"Name": "dest",
"Tasks": [{
"Name": "dest",
"Driver": "dtle",
"Config": {
"ConnectionConfig": { # 配置拜访目标端的数据库拜访形式
"Host": "10.186.65.15",
"Port": 3316,
"User": "root",
"Password": "root"
}
}
}],
"RestartPolicy": {
"Attempts": 3,
"Interval": 600000000000,
"Delay": 15000000000,
"Mode": "delay"
}
}
],
"ReschedulePolicy": {
"Attempts": 1,
"Interval": 1800000000000,
"Unlimited": false
}
}
}
留神:上述正文局部是为了不便疾速介绍各配置项意思,理论应用时,须要去掉正文局部。
2、启动 job
[root@10-186-65-5 ~]# cd /data/dtle/usr/share/dtle/scripts/
[root@10-186-65-5 scripts]# curl -XPOST "http://10.186.65.5:4646/v1/jobs" -d @job1.json -s | jq
{
"EvalID": "98023d12-82e7-76f6-9711-2ca17b500221",
"EvalCreateIndex": 2950,
"JobModifyIndex": 2950,
"Warnings": "","Index": 2950,"LastContact": 0,"KnownLeader": false
}
3、依据 json 文件中的 job id 可查看到工作的状态是否 running,如果不记得 job id,也能够执行命令获取 job id
[root@10-186-65-5 ~]# curl -s -XGET 127.0.0.1:4646/v1/jobs | jq '.[].ID'
"job1"
[root@10-186-65-5 ~]# curl -s -XGET 127.0.0.1:4646/v1/job/job1 | jq '.Status'
"running"
4、查看目标端数据库,源端数据已全量到目标端,且测试增量数据也能失常同步。
##### 目标端查看数据同步状况
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| dtle |
| dtle_d1_new |
| mysql |
| performance_schema |
| sys |
+--------------------+
6 rows in set (0.00 sec)
mysql> select * from dtle_d1_new.dtle_t1;
+----+----------+
| id | name |
+----+----------+
| 1 | xiaoming |
| 2 | xiaohong |
| 3 | xiaofang |
+----+----------+
3 rows in set (0.00 sec)
##### 源端新增数据
mysql> insert into dtle_t1 value(4,"xiaobai"),(5,"xiaosu");
Query OK, 2 rows affected (0.10 sec)
Records: 2 Duplicates: 0 Warnings: 0
##### 目标端查问到数据曾经同步过去
mysql> select * from dtle_d1_new.dtle_t1;
+----+----------+
| id | name |
+----+----------+
| 1 | xiaoming |
| 2 | xiaohong |
| 3 | xiaofang |
| 4 | xiaobai |
| 5 | xiaosu |
+----+----------+
5 rows in set (0.00 sec)
场景二:1、实现将源端 dtle_db2.dtle_table2 表数据传输到目标端时,目标端表名批改为 dtle_db2.dtle_table2_new。创立 /data/dtle/usr/share/dtle/scripts/job2.json 文件如下:
{
"Job": {
"ID": "job2", # 指定 job id,查看 job 状态时须要用到该 id
"Datacenters": ["dc1"],
"TaskGroups": [
{
"Name": "src",
"Tasks": [{
"Name": "src",
"Driver": "dtle",
"Config": {
"ReplicateDoDb": [{
"TableSchema": "dtle_db2", # 指定源端要复制的库名
"Tables": [{
"TableName": "dtle_table2", # 指定源端要复制的表
"TableRename":"dtle_table2_new" # 设置库复制到目标端时,新的表名
}]
}],
"GroupMaxSize": 1024,
"GroupTimeout": 100,
"DropTableIfExists": true,
"Gtid": "","ChunkSize": 2000,"ConnectionConfig": {"Host":"10.186.65.16","Port": 3316,"User":"root","Password":"root"}
}
}],
"RestartPolicy": {
"Attempts": 3,
"Interval": 600000000000,
"Delay": 15000000000,
"Mode": "delay"
}
}, {
"Name": "dest",
"Tasks": [{
"Name": "dest",
"Driver": "dtle",
"Config": {
"ConnectionConfig": {
"Host": "10.186.65.15",
"Port": 3316,
"User": "root",
"Password": "root"
}
}
}],
"RestartPolicy": {
"Attempts": 3,
"Interval": 600000000000,
"Delay": 15000000000,
"Mode": "delay"
}
}
],
"ReschedulePolicy": {
"Attempts": 1,
"Interval": 1800000000000,
"Unlimited": false
}
}
}
留神:上述正文局部是为了不便疾速介绍各配置项意思,理论应用时,须要去掉正文局部。
2、启动 job
[root@10-186-65-5 ~]# cd /data/dtle/usr/share/dtle/scripts/
[root@10-186-65-5 scripts]# curl -XPOST "http://10.186.65.5:4646/v1/jobs" -d @job2.json -s | jq
{
"EvalID": "9a54b81f-e139-e65a-20ec-a1b9f622f27e",
"EvalCreateIndex": 7039,
"JobModifyIndex": 7039,
"Warnings": "","Index": 7039,"LastContact": 0,"KnownLeader": false
}
3、查看 job 执行状态
[root@10-186-65-5 scripts]# curl -s -XGET 10.186.65.5:4646/v1/job/job2 | jq '.Status'
"running"
4、检查数据同步状况,查看目标端数据库,源端数据已全量到目标端,且测试增量数据也能失常同步。
##### 目标端查看
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| dtle |
| dtle_d1_new |
| dtle_db2 |
| mysql |
| performance_schema |
| sys |
+--------------------+
7 rows in set (0.00 sec)
mysql> use dtle_db2
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+--------------------+
| Tables_in_dtle_db2 |
+--------------------+
| dtle_table2_new |
+--------------------+
1 row in set (0.00 sec)
mysql> select * from dtle_table2_new;
+----+------+------+
| id | name | tag |
+----+------+------+
| 1 | mao | 0 |
| 2 | gou | 0 |
| 3 | tu | 0 |
| 4 | shu | 0 |
| 5 | yu | 0 |
+----+------+------+
5 rows in set (0.00 sec)
##### 源端更新数据
mysql> update dtle_table2 set tag='1' where id >3;
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2 Changed: 2 Warnings: 0
##### 目标端查看更新语句曾经同步
mysql> select * from dtle_table2_new;
+----+------+------+
| id | name | tag |
+----+------+------+
| 1 | mao | 0 |
| 2 | gou | 0 |
| 3 | tu | 0 |
| 4 | shu | 1 |
| 5 | yu | 1 |
+----+------+------+
5 rows in set (0.00 sec)
其余
如果要进行删除掉启动的 job,比方删除 job2 工作, 如下命令操作:
[root@10-186-65-5 scripts]# curl -s -XGET 10.186.65.5:4646/v1/jobs | jq '.[].ID'
"job1"
"job2"
[root@10-186-65-5 scripts]# curl -s -XDELETE 10.186.65.5:4646/v1/job/job2?purge=true |jq
{
"EvalID": "42889a00-9239-21e4-761c-6684abb0316c",
"EvalCreateIndex": 7067,
"JobModifyIndex": 7067,
"VolumeEvalID": "","VolumeEvalIndex": 0,"Index": 7067,"LastContact": 0,"KnownLeader": false
}
[root@10-186-65-5 scripts]# curl -s -XGET 10.186.65.5:4646/v1/jobs | jq '.[].ID'
"job1"
dtle 用户手册链接:
https://actiontech.github.io/…