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          百度MapReduce BMR

          InstanceGroup(实例组)

          查询实例组列表

          如下代码可根据集群ID获取其实例组信息:

           try:
              response = bmr_client.list_instance_groups(cluster_id)
              for instance_group in response.instance_groups:
                  LOG.debug('list instance groups %s: %s' % (instance_group.id, instance_group))
          except BceHttpClientError as e:
              if isinstance(e.last_error, BceServerError):
                  LOG.error('list_instance_groups failed. Response %s, code: %s, msg: %s'
                            % (e.last_error.status_code, e.last_error.code, e.last_error.message))
              else:
                  LOG.error('list_instance_groups failed. Unknown exception: %s' % e)

          修改实例组配置

          BMR支持对CORE、TASK节点进行配置变更,示例代码如下:

           try:
              bmr_client.scale_cluster(cluster_id, instance_group_id, instance_count)
          except BceHttpClientError as e:
              if isinstance(e.last_error, BceServerError):
                  LOG.error('scale_cluster failed. Response %s, code: %s, msg: %s'
                            % (e.last_error.status_code, e.last_error.code, e.last_error.message))
              else:
                  LOG.error('scale_cluster failed. Unknown exception: %s' % e)
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          Cluster(集群)