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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

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一、概述

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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。

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二、集群版本信息

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三、组件状态信息获取

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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

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四、告警实现

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python 脚本实现RM HA的监控告警

# -*- coding: utf-8 -*-
import logging
import time
from imp import reload

import requests
import json
import sys
"""
~~~~~~~~~~~~
author: kangll
date: 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  <kangll@winnerinf.com>'
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URL
api_url = "https://oapi.dingtalk.com/robot/send?access_token=f4e0f344306ce9b6eec60bec95d5aa7c57f4264a791458dc09121dd7e948ac64"
# RM hostname
rm_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).content


getHostComponentsStatus()

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