一、 DolphinScheduler简介
1.1 DolphinScheduler概述
Apache DolphinScheduler
是一个分布式、易扩展的可视化DAG工作流任务调度平台。致力于解决数据处理流程中错综复杂的依赖关系,使调度系统在数据处理流程中开箱即用。
1.2 DolphinScheduler核心架构
DolphinScheduler的主要角色如下:
MasterServer
采用分布式无中心设计理念,MasterServer主要负责 DAG 任务切分、任务提交、任务监控,并同时监听其它MasterServer和WorkerServer的健康状态。WorkerServer
也采用分布式无中心设计理念,WorkerServer主要负责任务的执行和提供日志服务。ZooKeeper
服务,系统中的MasterServer和WorkerServer节点都通过ZooKeeper来进行集群管理和容错。Alert
服务,提供告警相关服务。API
接口层,主要负责处理前端UI层的请求。UI
,系统的前端页面,提供系统的各种可视化操作界面。
二、DolphinScheduler部署说明
2.1 软硬件环境要求
2.1.1 操作系统版本要求
操作系统版本Red Hat Enterprise Linux7.0 及以上CentOS7.0 及以上Oracle Enterprise Linux7.0 及以上Ubuntu LTS 16.04及以上
2.1.2 服务器硬件要求
CPU内存网络4核+8 GB+千兆网卡
2.2 部署模式
DolphinScheduler
支持多种部署模式,包括单机模式(
Standalone
)、伪集群模式(
Pseudo-Cluster
)、集群模式(
Cluster
)等。
2.2.1 单机模式
单机模式(standalone)模式下,所有服务均集中于一个StandaloneServer进程中,并且其中内置了注册中心Zookeeper和数据库H2。只需配置JDK环境,就可一键启动DolphinScheduler,快速体验其功能。
2.2.2 伪集群模式
伪集群模式(Pseudo-Cluster)是在单台机器部署 DolphinScheduler 各项服务,该模式下master、worker、api server、logger server等服务都只在同一台机器上。Zookeeper和数据库需单独安装并进行相应配置。
2.2.3 集群模式
集群模式(Cluster)与伪集群模式的区别就是在多台机器部署 DolphinScheduler各项服务,并且可以配置多个Master及多个Worker。
三、DolphinScheduler集群模式部署
3.1 集群规划
集群模式下,可配置多个Master及多个Worker。通常可配置2~3个Master,若干个Worker。由于集群资源有限,此处配置一个Master,三个Worker,集群规划如下。
节点服务hadoop102master、workerhadoop103workerhadoop104worker
3.2 前置准备工作
1)三台节点均需部署
JDK
(1.8+),并配置相关环境变量。
2)需部署数据库,支持
MySQL
(5.7+)或者
PostgreSQL
(8.2.15+)。
3)需部署
Zookeeper
(3.4.6+)。
4)三台节点均需安装进程管理工具包
psmisc
。
[atguigu@hadoop102 ~]$ sudo yum install -y psmisc
[atguigu@hadoop103 ~]$ sudo yum install -y psmisc
[atguigu@hadoop104 ~]$ sudo yum install -y psmisc
3.3 解压DolphinScheduler安装包
1)上传DolphinScheduler安装包到hadoop102节点的
/opt/software
目录
2)解压安装包到当前目录
[atguigu@hadoop102 software]$ tar -zxvf apache-dolphinscheduler-1.3.9-bin.tar.gz
注:解压目录并非最终的安装目录
3.4 初始化数据库
DolphinScheduler 元数据存储在关系型数据库中,故需创建相应的数据库和用户。
1)创建数据库
mysql>CREATEDATABASE dolphinscheduler DEFAULTCHARACTERSET utf8 DEFAULTCOLLATE utf8_general_ci;
2)创建用户
mysql>CREATEUSER'dolphinscheduler'@'%' IDENTIFIED BY 'dolphinscheduler';
注:
若出现以下错误信息,表明新建用户的密码过于简单。ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
可提高密码复杂度或者执行以下命令降低MySQL密码强度级别。
mysql>setglobal validate_password_length=4; mysql>setglobal validate_password_policy=0;
3)赋予用户相应权限
mysql>GRANTALLPRIVILEGESON dolphinscheduler.*TO'dolphinscheduler'@'%';
mysql> flush privileges;
4)修改数据源配置文件
进入DolphinScheduler解压目录
cd /opt/software/apache-dolphinscheduler-1.3.9-bin/
修改conf目录下的datasource.properties文件
vim conf/datasource.properties
修改内容如下
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://hadoop102:3306/dolphinscheduler?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=dolphinscheduler
spring.datasource.password=dolphinscheduler
5)拷贝MySQL驱动到DolphinScheduler的解压目录下的
lib
中
cp /opt/software/mysql-connector-java-5.1.27-bin.jar lib/
6)执行数据库初始化脚本
数据库初始化脚本位于DolphinScheduler解压目录下的script目录中,即
/opt/software/ds/apache-dolphinscheduler-1.3.9-bin/script/
。
script/create-dolphinscheduler.sh
3.5 配置一键部署脚本
修改解压目录下的
conf/config
目录下的
install_config.conf
文件
vim conf/config/install_config.conf
修改内容如下
# postgresql or mysql
dbtype="mysql"
# db config
# db address and port
dbhost="hadoop102:3306"
# db username
username="dolphinscheduler"
# database name
dbname="dolphinscheduler"
# db passwprd
# NOTICE: if there are special characters, please use the \ to escape, for example, `[` escape to `\[`
password="dolphinscheduler"
# zk cluster
zkQuorum="hadoop102:2181,hadoop103:2181,hadoop104:2181"
# Note: the target installation path for dolphinscheduler, please not config as the same as the current path (pwd)
installPath="/opt/module/dolphinscheduler"
# deployment user
# Note: the deployment user needs to have sudo privileges and permissions to operate hdfs. If hdfs is enabled, the root directory needs to be created by itself
deployUser="atguigu"
# resource storage type: HDFS, S3, NONE
resourceStorageType="HDFS"
# resource store on HDFS/S3 path, resource file will store to this hadoop hdfs path, self configuration, please make sure the directory exists on hdfs and have read write permissions. "/dolphinscheduler" is recommended
resourceUploadPath="/dolphinscheduler"
# if resourceStorageType is HDFS,defaultFS write namenode address,HA you need to put core-site.xml and hdfs-site.xml in the conf directory.
# if S3,write S3 address,HA,for example :s3a://dolphinscheduler,
# Note,s3 be sure to create the root directory /dolphinscheduler
defaultFS="hdfs://hadoop102:8020"
# resourcemanager port, the default value is 8088 if not specified
resourceManagerHttpAddressPort="8088"
# if resourcemanager HA is enabled, please set the HA IPs; if resourcemanager is single, keep this value empty
yarnHaIps=
# if resourcemanager HA is enabled or not use resourcemanager, please keep the default value; If resourcemanager is single, you only need to replace ds1 to actual resourcemanager hostname
singleYarnIp="hadoop103"
# who have permissions to create directory under HDFS/S3 root path
# Note: if kerberos is enabled, please config hdfsRootUser=
hdfsRootUser="atguigu"
# api server port
apiServerPort="12345"
# install hosts
# Note: install the scheduled hostname list. If it is pseudo-distributed, just write a pseudo-distributed hostname
ips="hadoop102,hadoop103,hadoop104"
# ssh port, default 22
# Note: if ssh port is not default, modify here
sshPort="22"
# run master machine
# Note: list of hosts hostname for deploying master
masters="hadoop102"
# run worker machine
# note: need to write the worker group name of each worker, the default value is "default"
workers="hadoop102:default,hadoop103:default,hadoop104:default"
# run alert machine
# note: list of machine hostnames for deploying alert server
alertServer="hadoop102"
# run api machine
# note: list of machine hostnames for deploying api server
apiServers="hadoop102"
3.6 一键部署DolphinScheduler
1)启动Zookeeper集群
zk.sh start
2)一键部署并启动DolphinScheduler
./install.sh
3)查看DolphinScheduler进程
--------- hadoop102 ----------
29139 ApiApplicationServer
28963 WorkerServer
3332 QuorumPeerMain
2100 DataNode
28902 MasterServer
29081 AlertServer
1978 NameNode
29018 LoggerServer
2493 NodeManager
29551 Jps
--------- hadoop103 ----------
29568 Jps
29315 WorkerServer
2149 NodeManager
1977 ResourceManager
2969 QuorumPeerMain
29372 LoggerServer
1903 DataNode
--------- hadoop104 ----------
1905 SecondaryNameNode
27074 WorkerServer
2050 NodeManager
2630 QuorumPeerMain
1817 DataNode
27354 Jps
27133 LoggerServer
4)访问DolphinScheduler UI
DolphinScheduler UI地址为http://hadoop102:12345/dolphinscheduler
初始用户的用户名为:
admin
,密码为
dolphinscheduler123
3.7 DolphinScheduler启停命令
DolphinScheduler的启停脚本均位于其安装目录的bin目录下。
1)一键启停所有服务
./bin/start-all.sh
./bin/stop-all.sh
注意同Hadoop的启停脚本进行区分。
2)启停 Master
./bin/dolphinscheduler-daemon.sh start master-server
./bin/dolphinscheduler-daemon.sh stop master-server
3)启停 Worker
./bin/dolphinscheduler-daemon.sh start worker-server
./bin/dolphinscheduler-daemon.sh stop worker-server
4)启停 Api
./bin/dolphinscheduler-daemon.sh start api-server
./bin/dolphinscheduler-daemon.sh stop api-server
5)启停 Logger
./bin/dolphinscheduler-daemon.sh start logger-server
./bin/dolphinscheduler-daemon.sh stop logger-server
6)启停 Alert
./bin/dolphinscheduler-daemon.sh start alert-server
./bin/dolphinscheduler-daemon.sh stop alert-server
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