Azkaban配置Work Flow案例实操

Love The Way You Lie 2023-01-06 11:38 241阅读 0赞

# Work Flow案例实操 #

### 目录 ###

*  Work Flow案例实操
 *   *  1. Yarm语法简介
     *  2. HelloWorld案例
     *  3. JavaProcess案例
     *  4. 作业依赖案例
     *  5. 自动失败重试案例
     *  6. 手动失败重试案例

## 1. Yarm语法简介 ##

> 2.0 azkaban支持 properties配置文件，也支持yml配置文件！  
> 3.0 azkaban默认支持yml配置文件！

**yarm语法：**

yml:  简洁，适合表示层级关系复杂的数据！

*  yml主要使用缩进表示层级关系，一旦下一行出现了缩进，表示下一行是上一行的子属性！
 *  缩进时，如果缩进的距离一致，层级一致！
 *  大量使用空格，缩进时不能使用tab，K-V之间必须使用空格！

K-V类型表示方法:

k:(空格)v

对象类型数据,map(k-v)

jack:
      name: jack
      age: 20

单行：

jack: { name: jack,age: 20}

数组类型数据，List,Set

fruits:
      - apple
      - banana

单行:

fruits: [apple,banana]

## 2. HelloWorld案例 ##

**1）在windows环境，新建azkaban.project文件，编辑内容如下**

azkaban-flow-version: 2.0

注意：该文件作用，是采用新的Flow-API方式解析flow文件。

**2）新建basic.flow文件，内容如下**

nodes:
      - name: jobA
        type: command
        config:
          command: echo "Hello World"

（1）Name：job名称

（2）Type：job类型。command表示你要执行作业的方式为命令

（3）Config：job配置

**3）将azkaban.project、basic.flow文件压缩到一个zip文件，文件名称必须是英文。**

**4）在WebServer新建项目：http://hadoop102:8081/index**  
![在这里插入图片描述][20210114114031765.png]

**5）给项目名称命名和添加项目描述**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70]

**6）first.zip文件上传**  
![在这里插入图片描述][20210114114049179.png]

**7）选择上传的文件**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 1]

**8）执行任务流**  
![在这里插入图片描述][20210114114108905.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 3]

**9）在日志中，查看运行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 5]

## 3. JavaProcess案例 ##

JavaProcess类型可以运行一个自定义主类方法，type类型为javaprocess，可用的配置为：  
Xms：最小堆  
Xmx：最大堆  
java.class：要运行的Java对象，其中必须包含Main方法

案例：  
1）新建一个azkaban的maven工程  
2）创建包名：com.azkaban  
3）创建AzTest类

package com.azkaban;
    
    public class AzTest { 
        public static void main(String[] args) { 
            System.out.println("This is for testing!");
        }
    }

4）打包成jar包azkaban-1.0-SNAPSHOT.jar

5）新建testJava.flow，内容如下

nodes:
      - name: test_java
        type: javaprocess
        config:
          Xms: 96M
          Xmx: 200M
          java.class: com.azkaban.AzTest

6）将Jar包、flow文件和project文件打包成javatest.zip  
7）创建项目=》上传javatest.zip =》执行作业=》观察结果

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 7]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 9]

## 4. 作业依赖案例 ##

需求：JobA和JobB执行完了，才能执行JobC

具体步骤：  
1）修改basic.flow为如下内容

nodes:
      - name: jobC
        type: command
        # jobC 依赖 JobA和JobB
        dependsOn:
          - jobA
          - jobB
        config:
          command: echo "I’m JobC"
    
      - name: jobA
        type: command
        config:
          command: echo "I’m JobA"
    
      - name: jobB
        type: command
        config:
          command: echo "I’m JobB"

（1）**dependsOn：作业依赖，后面案例中演示**

2）将修改后的basic.flow和azkaban.project压缩成second.zip文件

3）重复HelloWorld后续步骤。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 10]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 11]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 12]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 13]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 14]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 15]

## 5. 自动失败重试案例 ##

需求：如果执行任务失败，需要重试3次，重试的时间间隔10000ms

具体步骤：  
1）编译配置流

nodes:
      - name: JobA
        type: command
        config:
          command: sh /not_exists.sh
          retries: 3
          retry.backoff: 10000

参数说明：  
retries：重试次数  
retry.backoff：重试的时间间隔

2）将修改后的basic.flow和azkaban.project压缩成four.zip文件

3）重复HelloWorld后续步骤。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 16]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 17]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 18]

4）执行并观察到一次失败+三次重试

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 19]

5）也可以点击上图中的Log，在任务日志中看到，总共执行了4次。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 20]  
6）也可以在Flow全局配置中添加任务失败重试配置，此时重试配置会应用到所有Job。  
案例如下：

config:
      retries: 3
      retry.backoff: 10000
    nodes:
      - name: JobA
        type: command
        config:
          command: sh /not_exists.sh

## 6. 手动失败重试案例 ##

需求：JobA=》JobB（依赖于A）=》JobC=》JobD=》JobE=》JobF。生产环境，任何Job都有可能挂掉，可以根据需求执行想要执行的Job。

具体步骤：  
1）编译配置流

nodes:
      - name: JobA
        type: command
        config:
          command: echo "This is JobA."
    
      - name: JobB
        type: command
        dependsOn:
          - JobA
        config:
          command: echo "This is JobB."
    
      - name: JobC
        type: command
        dependsOn:
          - JobB
        config:
          command: echo "This is JobC."
    
      - name: JobD
        type: command
        dependsOn:
          - JobC
        config:
          command: echo "This is JobD."
    
      - name: JobE
        type: command
        dependsOn:
          - JobD
        config:
          command: echo "This is JobE."
    
      - name: JobF
        type: command
        dependsOn:
          - JobE
        config:
          command: echo "This is JobF."

2）将修改后的basic.flow和azkaban.project压缩成five.zip文件

3）重复HelloWorld后续步骤。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 21]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 22]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mjc5NjQwMw_size_16_color_FFFFFF_t_70 23]

Enable和Disable下面都分别有如下参数：  
Parents：该作业的上一个任务  
Ancestors：该作业前的所有任务  
Children：该作业后的一个任务  
Descendents：该作业后的所有任务  
Enable All：所有的任务

4）可以根据需求选择性执行对应的任务。

![在这里插入图片描述][20210114134341318.png]

[20210114114031765.png]: /images/20221119/756aa2acd166427897543bf6588d7458.png
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