行业知识
【Ambari】Python调用Rest API 获取YARN HA状态信息并发送钉钉告警
2026-11-04 16:56:52
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目录
一、概述
二、集群版本信息
三、组件状态信息获取
三、告警实现
一、概述
Ambari 借鉴了很多成熟分布式软件的 API 设计。Rest API 就是一个很好地体现。通过 Ambari 的 Rest API，可以在脚本中通过 curl 维护整个集群。并且，我们可以用 Rest API 实现一些无法在 Ambari GUI 上面做的操作。
二、集群版本信息
三、组件状态信息获取
参考：【Ambari】Python调用Rest API 获取集群状态信息并发送钉钉告警-CSDN博客
RESOURCEMANAGER停止
curl -u admin:admin -i -H 'X-Requested-By:ambari' -X PUT -d '{"RequestInfo":{"context":"Restart RESOURCEMANAGER via REST"},"Body" : {"HostRoles" : {"state":"INSTALLED"}}}' http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp105/host_components/RESOURCEMANAGER - -u Ambari登录用户：密码
- -i -H获取http请求的完整头部信息，包括请求方法、请求地址、请求头信息等
- -X 同时想发 HEAD、GET 或 POST 请求，需在 -X 中声明要使用的请求方式
ambari页面显示停止成功调用
ambari页面RM服务停止
RESOURCEMANAGER启动
curl -u admin:admin -i -H 'X-Requested-By:ambari' -X PUT -d '{"RequestInfo":{"context":"Restart RESOURCEMANAGER via REST"},"Body" : {"HostRoles" : {"state":"STARTED"}}}' http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp105/host_components/RESOURCEMANAGER直接使用RESTART
curl -uadmin:admin -H 'X-Requested-By: ambari' -X POST -d '{"RequestInfo":{"command":"RESTART","context":"Restart RESOURCEMANAGER via REST","operation_level":{"level":"HOST","cluster_name":"winner"}},"Requests/resource_filters":[{"service_name":"YARN","component_name":"RESOURCEMANAGER","hosts":"hdp103"}]}' http://192.168.2.153:8080/api/v1/clusters/winner/requests请求响应接受
四、告警实现
python 脚本实现RM HA的监控告警
# -*- coding: utf-8 -*-import loggingimport timefrom imp import reloadimport requestsimport jsonimport sys"""~~~~~~~~~~~~author: kanglldate: 2023/12/6 13:29 desc: -- curl 请求，如下为测试链接 curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/hosts/winner http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp105/host_components/RESOURCEMANAGER-- datanode 启动 curl -u admin:admin -i -H 'X-Requested-By:ambari' -X PUT -d '{"RequestInfo":{"context":"Start RESOURCEMANAGER via REST"},"Body" : {"ServiceInfo" : {"state":"STARTED"}}}' http://192.168.2.153:8080/api/v1/clusters/winner/services/HDFS"""reload(sys)sys.setdefaultencoding('utf8')__author__ = 'kanglilong 'logger = logging.getLogger('mylogger')logger.setLevel(level=logging.INFO)# Ambari rest api 访问地址control_url = "http://192.168.2.153:8080/api/v1/clusters/winner/hosts"# ambari web 登录账号AUTH = ("admin", "admin")headers = {'Content-Type': 'application/json;charset=utf-8'}# 钉钉URLapi_url = "https://oapi.dingtalk.com/robot/send?access_token=f4e0f344306ce9b6eec60bec95d5aa7c57f4264a791458dc09121dd7e948ac64"# RM hostnamerm_hostname_01 = "hdp103"rm_hostname_02 = "hdp105"requests_rm_url = "http://192.168.2.153:8080/api/v1/clusters/winner/requests"def getHostComponentsStatus(): """ 获取某个服务器上某个组件的状态信息 :param host: :return: component_dict 组件与其状态 status 当前节点状态是否符合期望， getStatus 是否获取到了状态 """ now_time = time.localtime(time.time()) formatted_time = time.strftime('%Y-%m-%d %H:%M:%S', now_time) json_text = { "RequestInfo": { "command": "RESTART", "context": "Restart RESOURCEMANAGER via REST", "operation_level": { "level": "HOST", "cluster_name": "winner" } }, "Requests/resource_filters": [{ "service_name": "YARN", "component_name": "RESOURCEMANAGER", "hosts": "{}".format(rm_hostname_01) }] } get_rm_status_url_01 = control_url + "/{}/host_components/RESOURCEMANAGER".format(rm_hostname_01) get_rm_status_url_02 = control_url + "/{}/host_components/RESOURCEMANAGER".format(rm_hostname_02) print("-----------------") rep01 = requests.get(get_rm_status_url_01, auth=AUTH) # 如果状态码是20x 则获取成功 print(rep01.status_code) if str(rep01.status_code).startswith("200"): jsonRep01 = json.loads(rep01.text) component_name_01 = jsonRep01['HostRoles']['component_name'] status_01 = jsonRep01['HostRoles']['state'] ha_state_01 = jsonRep01['HostRoles']['ha_state'] host_name_01 = jsonRep01['HostRoles']['host_name'] # STARTED else: # 没有正常获取到状态 print("没有正常获取到状态") rep02 = requests.get(get_rm_status_url_02, auth=AUTH) # 如果状态码是20x 则获取成功 print(rep02.status_code) if str(rep02.status_code).startswith("200"): jsonRep02 = json.loads(rep02.text) component_name_02 = jsonRep02['HostRoles']['component_name'] status_02 = jsonRep02['HostRoles']['state'] ha_state_02 = jsonRep02['HostRoles']['ha_state'] host_name_02 = jsonRep02['HostRoles']['host_name'] # STARTED else: # 没有正常获取到状态 print("没有正常获取到状态") # RM 为 STARTED status if component_name_01 == component_name_02 and status_01 == "STARTED" and status_02 == "STARTED": # 两个RM都为STANDBY则重启其中一个 if ha_state_01 == ha_state_02 and ha_state_01 == "STANDBY" and ha_state_02 == "STANDBY": text = "告警对象：主机名：" + host_name_01 + ', ' + host_name_02 + ' \n组件名称：' + component_name_01 + " \n告警内容：HDP集群服务 " + component_name_01 + " 高可用状态异常 " + ha_state_01 + ", 触发重启" + "\n告警时间：" + formatted_time send_msg(text) print("RESOURCEMANAGER state abnormal.") restart_res = requests.post(requests_rm_url, data=json.dumps(json_text), auth=AUTH, headers=headers) print(restart_res.text) if str(restart_res.status_code).startswith("202"): # 没有正常获取到状态 print("重启请求发送成功!") else: # 没有正常获取到状态 print("重启请求发送成功!") else: # print("RESOURCEMANAGER state normal.")def send_msg(text): """ :param text: 告警文本 :return: """ json_text = { "msgtype": "text", "text": { "content": text }, "at": { "atMobiles": ["1786881xxxx"] } } requests.post(api_url, json.dumps(json_text), headers=headers).contentgetHostComponentsStatus()钉钉告警发送成功
RM 重启一台RM操作完成，触发HA的强制切换
需要添加配置 ambari.properties
vi /etc/ambari-server/conf/ambari.properties# 添加如下配置api.csrfPrevention.enabled=false# 重启ambari-server restart
request请求返回的状态码
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