Ambari自定义服务
基于ambari-2.7.4.0和HDP3.1版本。
一、自定义服务实例
本案例创建一个名为 "SAMPLESRV"的服务,以添加到一个已存在的Stack定义。服务包括 MASTER,SLAVE以及CLIENT 组件。
创建与添加服务
- 在Ambari服务器上,cd到 /var/lib/ambari-server/resources/stacks/HDP/3.1/services 目录。
- snippet.bash
cd /var/lib/ambari-server/resources/stacks/HDP/3.1/services
- 创建目录 /var/lib/ambari-server/resources/stacks/HDP/3.1/services/SAMPLESRV,这样就包含了 SAMPLESRV 定义。
- snippet.bash
mkdir /var/lib/ambari-server/resources/stacks/HDP/3.1/services/SAMPLESRV cd /var/lib/ambari-server/resources/stacks/HDP/3.1/services/SAMPLESRV
- cd到新建的 SAMPLESRV 目录,创建 metainfo.xml 文件用于描述新加的服务。例如:
- snippet.xml
<?xml version="1.0"?> <metainfo> <schemaVersion>2.0</schemaVersion> <services> <service> <name>SAMPLESRV</name> <displayName>New Sample Service</displayName> <comment>A New Sample Service</comment> <version>1.0.0</version> <components> <component> <name>SAMPLESRV_MASTER</name> <displayName>Sample Srv Master</displayName> <category>MASTER</category> <cardinality>1</cardinality> <commandScript> <script>scripts/master.py</script> <scriptType>PYTHON</scriptType> <timeout>600</timeout> </commandScript> </component> <component> <name>SAMPLESRV_SLAVE</name> <displayName>Sample Srv Slave</displayName> <category>SLAVE</category> <cardinality>1+</cardinality> <commandScript> <script>scripts/slave.py</script> <scriptType>PYTHON</scriptType> <timeout>600</timeout> </commandScript> </component> <component> <name>SAMPLESRV_CLIENT</name> <displayName>Sample Srv Client</displayName> <category>CLIENT</category> <cardinality>1+</cardinality> <commandScript> <script>scripts/sample_client.py</script> <scriptType>PYTHON</scriptType> <timeout>600</timeout> </commandScript> </component> </components> <osSpecifics> <osSpecific> <osFamily>any</osFamily> <!-- note: use osType rather than osFamily for Ambari 1.5.0 and 1.5.1 --> </osSpecific> </osSpecifics> </service> </services> </metainfo>
- 以上创建的服务名称为 "SAMPLESRV",其包含:
- 一个 MASTER 组件 "SAMPLESRV_MASTER"
- 一个 SLAVE 组件 "SAMPLESRV_SLAVE"
- 一个 CLIENT 组件 "SAMPLESRV_CLIENT"
- 接下来,创建脚本命令。创建一个脚本命令 /var/lib/ambari-server/resources/stacks/HDP/3.1/services/SAMPLESR/package/scripts。
- snippet.bash
mkdir -p /var/lib/ambari-server/resources/stacks/HDP/3.1/services/TESTSRV/package/scripts cd /var/lib/ambari-server/resources/stacks/HDP/3.1/services/TESTSRV/package/scripts
- cd到创建的脚本命令准备新建 .py 脚本文件。
master.py:
- snippet.python
import sys from resource_management import * class Master(Script): def install(self, env): print 'Install the Sample Srv Master'; def stop(self, env): print 'Stop the Sample Srv Master'; def start(self, env): print 'Start the Sample Srv Master'; def status(self, env): print 'Status of the Sample Srv Master'; def configure(self, env): print 'Configure the Sample Srv Master'; if __name__ == "__main__": Master().execute()
slave.py:
- snippet.python
import sys from resource_management import * class Slave(Script): def install(self, env): print 'Install the Sample Srv Slave'; def stop(self, env): print 'Stop the Sample Srv Slave'; def start(self, env): print 'Start the Sample Srv Slave'; def status(self, env): print 'Status of the Sample Srv Slave'; def configure(self, env): print 'Configure the Sample Srv Slave'; if __name__ == "__main__": Slave().execute()
sample_client.py:
- snippet.python
import sys from resource_management import * class SampleClient(Script): def install(self, env): print 'Install the Sample Srv Client'; def configure(self, env): print 'Configure the Sample Srv Client'; if __name__ == "__main__": SampleClient().execute()
- 重启 Ambari 服务准备安装新服务。
- snippet.bash
ambari-server restart
安装服务(通过Ambari 网页的"Add Services")
注:Ambari 1.7.0之后的版本才有网页添加自定义服务功能
- 在 Ambari 页面,导航到 Services 单击 Actions 按钮。
- 在 "Add Services" 向导页面。可以看到新增了 "New Sample Service" 可选项。
- 选中 "New Sample Service" 继续。
- 指定 "Sample Srv Master" 并继续。
- 选择需要安装 "Sample Srv Client" 的服务器,并继续。
- 一旦安装完成,"New Sample Service" 将添加到 Service 导航区。
- 如果想把 "Sample Srv Client" 添加到服务器,可以导航至 Hosts,并指定服务器后单击 "+ Add"。
二、参考
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