注：将整个项目的数据处理过程，从数据采集到数据分析，再到结果数据的导出，一系列的任务分割成若干个oozie的工作流，并用coordinator进行协调。

工作流定义示例

Ooize配置片段示例，详见项目工程

1.日志预处理mr程序工作流定义

<workflow-app name="weblogpreprocess" xmlns="uri:oozie:workflow:0.4">
<start to="firstjob"/>
<action name="firstjob">
<map-reduce>
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<prepare>
<delete path="${nameNode}/${outpath}"/>
</prepare>
<configuration>
<property>
<name>mapreduce.job.map.class</name>
<value>cn.itcast.bigdata.hive.mr.WeblogPreProcess$WeblogPreProcessMapper</value>
</property>

<property>
<name>mapreduce.job.output.key.class</name>
<value>org.apache.hadoop.io.Text</value>
</property>
<property>
<name>mapreduce.job.output.value.class</name>
<value>org.apache.hadoop.io.NullWritable</value>
</property>

<property>
<name>mapreduce.input.fileinputformat.inputdir</name>
<value>${inpath}</value>
</property>
<property>
<name>mapreduce.output.fileoutputformat.outputdir</name>
<value>${outpath}</value>
</property>
<property>
<name>mapred.mapper.new-api</name>
<value>true</value>
</property>
<property>
<name>mapred.reducer.new-api</name>
<value>true</value>
</property>

</configuration>
</map-reduce>
<ok to="end"/>
<error to="kill"/>

2.数据加载etl工作流定义

<workflow-app xmlns="uri:oozie:workflow:0.5" name="hive2-wf">
<start to="hive2-node"/>

<action name="hive2-node">
<hive2 xmlns="uri:oozie:hive2-action:0.1">
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<configuration>
<property>
<name></name>
<value>${queueName}</value>
</property>
</configuration>
<jdbc-url>jdbc:hive2://hdp-node-01:10000</jdbc-url>
<script>script.q</script>
<param>input=/weblog/outpre2</param>
</hive2>
<ok to="end"/>
<error to="fail"/>
</action>

<kill name="fail">
<message>Hive2 (Beeline) action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
</kill>
<end name="end"/>
</workflow-app>

3.数据加载工作流所用hive脚本

create database if not exists dw_weblog;
use dw_weblog;
drop table if exists t_orgin_weblog;
create table t_orgin_weblog(valid string,remote_addr string,
remote_user string,
time_local string,
request string,
status string,
body_bytes_sent string,
http_referer string,
http_user_agent string)
row format delimited
fields terminated by '\001';
load data inpath '/weblog/preout' overwrite into table t_orgin_weblog;

drop table if exists t_ods_detail_tmp_referurl;
create table t_ods_detail_tmp_referurl as
SELECT a.*,b.*
FROM t_orgin_weblog a 
LATERAL VIEW parse_url_tuple(regexp_replace(http_referer, "\"", ""), 'HOST', 'PATH','QUERY', 'QUERY:id') b as host, path, query, query_id;

drop table if exists t_ods_detail;
create table t_ods_detail as 
select b.*,substring(time_local,0,11) as daystr,
substring(time_local,13) as tmstr,
substring(time_local,4,3) as month,
substring(time_local,0,2) as day,
substring(time_local,13,2) as hour
from t_ods_detail_tmp_referurl b;

drop table t_ods_detail_prt;
create table t_ods_detail_prt(
valid                  string,
remote_addr            string,
remote_user            string,
time_local             string,
request                string,
status                 string,
body_bytes_sent        string,
http_referer           string,
http_user_agent        string,
host                   string,
path                   string,
query                  string,
query_id               string,
daystr                 string,
tmstr                  string,
month                  string,
day                    string,
hour                   string) 
partitioned by (mm string,dd string);


insert into table t_ods_detail_prt partition(mm='Sep',dd='18')
select * from t_ods_detail where daystr='18/Sep/2013';
insert into table t_ods_detail_prt partition(mm='Sep',dd='19')
select * from t_ods_detail where daystr='19/Sep/2013';

工作流单元测试

1、工作流定义配置上传

[hadoop@hdp-node-01 wf-oozie]$ hadoop fs -put hive2-etl /user/hadoop/oozie/myapps/
[hadoop@hdp-node-01 wf-oozie]$ hadoop fs -put hive2-dw /user/hadoop/oozie/myapps/ 
[hadoop@hdp-node-01 wf-oozie]$ ll
total 12
drwxrwxr-x. 2 hadoop hadoop 4096 Nov 23 16:32 hive2-dw
drwxrwxr-x. 2 hadoop hadoop 4096 Nov 23 16:32 hive2-etl
drwxrwxr-x. 3 hadoop hadoop 4096 Nov 23 11:24 weblog
[hadoop@hdp-node-01 wf-oozie]$ export OOZIE_URL=http://localhost:11000/oozie

2、工作流单元提交启动

oozie job -D inpath=/weblog/input -D outpath=/weblog/outpre -config weblog/job.properties  -run

启动etl的hive工作流

oozie job -config hive2-etl/job.properties  -run

启动pvs统计的hive工作流

oozie job -config hive2-dw/job.properties  -run

3、工作流coordinator配置（片段）

多个工作流job用coordinator组织协调：

[hadoop@hdp-node-01 hive2-etl]$ ll
total 28
-rw-rw-r--. 1 hadoop hadoop  265 Nov 13 16:39 config-default.xml
-rw-rw-r--. 1 hadoop hadoop  512 Nov 26 16:43 coordinator.xml
-rw-rw-r--. 1 hadoop hadoop  382 Nov 26 16:49 job.properties
drwxrwxr-x. 2 hadoop hadoop 4096 Nov 27 11:26 lib
-rw-rw-r--. 1 hadoop hadoop 1910 Nov 23 17:49 script.q
-rw-rw-r--. 1 hadoop hadoop  687 Nov 23 16:32 workflow.xml

config-default.xml:

<configuration>
<property>
<name>jobTracker</name>
<value>hdp-node-01:8032</value>
</property>
<property>
<name>nameNode</name>
<value>hdfs://hdp-node-01:9000</value>
</property>
<property>
<name>queueName</name>
<value>default</value>
</property>
</configuration>

job.properties:

=hadoop
oozie.use.system.libpath=true
oozie.libpath=hdfs://hdp-node-01:9000/user/hadoop/share/lib
oozie.wf.application.path=hdfs://hdp-node-01:9000/user/hadoop/oozie/myapps/hive2-etl/

workflow.xml:

<workflow-app xmlns="uri:oozie:workflow:0.5" name="hive2-wf">
<start to="hive2-node"/>

<action name="hive2-node">
<hive2 xmlns="uri:oozie:hive2-action:0.1">
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<configuration>
<property>
<name></name>
<value>${queueName}</value>
</property>
</configuration>
<jdbc-url>jdbc:hive2://hdp-node-01:10000</jdbc-url>
<script>script.q</script>
<param>input=/weblog/outpre2</param>
</hive2>
<ok to="end"/>
<error to="fail"/>
</action>

<kill name="fail">
<message>Hive2 (Beeline) action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
</kill>
<end name="end"/>
</workflow-app>

coordinator.xml:

<coordinator-app name="cron-coord" frequency="${coord:minutes(5)}" start="${start}" end="${end}" timezone="Asia/Shanghai" xmlns="uri:oozie:coordinator:0.2">
<action>
<workflow>
<app-path>${workflowAppUri}</app-path>
<configuration>
<property>
<name>jobTracker</name>
<value>${jobTracker}</value>
</property>
<property>
<name>nameNode</name>
<value>${nameNode}</value>
</property>
<property>
<name>queueName</name>
<value>${queueName}</value>
</property>
</configuration>
</workflow>
</action>
</coordinator-app>