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三、组件状态信息获取

[四、DataNode 启动](#四、DataNode 启动)

[五、Python 实现 Rest API获取组件状态并告警](#五、Python 实现 Rest API获取组件状态并告警)

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

复制代码

curl -u admin:admin -i -H X-Requested-By:ambari -XGET  http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp106/host_components/NODEMANAGER
curl -u admin:admin -i -H X-Requested-By:ambari -XGET   http://192.168.2.153:8080/api/v1/clusters/winner/services/HIVE
curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/services/HIVE
curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/services/TEZ
curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/services/HBASE
curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/services/HDFS
curl -u admin:admin -i -H X-Requested-By:ambari -XGET http://192.168.2.153:8080/api/v1/clusters/winner/services/ZOOKEEPER

-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

获取hdp106服务器上NODEMANAGER 的状态信息

复制代码

[winner_spark@hdp105 root]$ curl -u admin:admin -i -H X-Requested-By:ambari -XGET  http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp106/host_components/NODEMANAGER
HTTP/1.1 200 OK
Date: Tue, 29 Aug 2023 06:15:38 GMT
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Cache-Control: no-store
Pragma: no-cache
Set-Cookie: AMBARISESSIONID=node0146ihmo69ytgk12k48wrpwrt0v5.node0;Path=/;HttpOnly
Expires: Thu, 01 Jan 1970 00:00:00 GMT
User: admin
Content-Type: text/plain;charset=utf-8
X-Content-Type-Options: nosniff
Vary: Accept-Encoding, User-Agent
Transfer-Encoding: chunked

{
  "href" : "http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp106/host_components/NODEMANAGER",
  "HostRoles" : {
    "cluster_name" : "winner",
    "component_name" : "NODEMANAGER",
    "desired_admin_state" : "INSERVICE",
    "desired_repository_version" : "3.1.4.0-315",
    "desired_stack_id" : "HDP-3.1",
    "desired_state" : "STARTED",
    "display_name" : "NodeManager",
    "host_name" : "hdp106",
    "maintenance_state" : "OFF",
    "public_host_name" : "hdp106",
    "reload_configs" : false,
    "service_name" : "YARN",
    "stale_configs" : false,
    "state" : "STARTED",
    "upgrade_state" : "NONE",
    "version" : "3.1.4.0-315",
    "actual_configs" : { }
  },
  "host" : {
    "href" : "http://192.168.2.153:8080/api/v1/clusters/winner/hosts/hdp106"
  },
  "component" : [
    {
      "href" : "http://192.168.2.153:8080/api/v1/clusters/winner/services/YARN/components/NODEMANAGER",
      "ServiceComponentInfo" : {
        "cluster_name" : "winner",
        "component_name" : "NODEMANAGER",
        "service_name" : "YARN"
      }
    }
  ],
  "processes" : [ ]
}

四、DataNode 启动

复制代码

curl -u admin:admin -i -H  'X-Requested-By:ambari'  -X PUT -d  '{"RequestInfo":{"context":"Start DATANODE via REST"},"Body" : {"ServiceInfo" : {"state":"STARTED"}}}' http://192.168.2.153:8080/api/v1/clusters/winner/services/HDFS

datanode 启动返回 Accepted

ambari 页面显示： Start DATANODE via REST 表示我们执行是成功的。

五、Python 实现 Rest API获取组件状态并告警

python 复制代码

import time

import requests
import json

"""
~~~~~~~~~~~~
author: kangll
date: 2023/8/25 17:22
desc: Ambari rest api 获取组件告警信息
-- 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
-- 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

"""

__author__ = 'kanglilong'

# 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"
hostname = "hdp105"
ambari_server_ip = "192.168.2.153"


def getComponentStatus(host, component):
    """
    获取某个节点 组件的状态
    :param host: 主机名
    :param component: 组件
    :return: 状态
    """
    get_component_status_url = control_url + "/{}/host_components/{}".format(
        host, component)

    try:
        rep = requests.get(get_component_status_url, auth=AUTH)
        if rep.status_code == 200:
            jsonRep = json.loads(rep.text)
            status = jsonRep['HostRoles']['state']
            return status
        else:
            print("获取组件状态返回异常")
    except Exception as e:
        print(e)


def getHostComponentsStatus(host):
    """
    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
    """
    component_dict = {}
    get_host_components_status_url = control_url + "/{}/host_components".format(host)

    try:
        rep = requests.get(get_host_components_status_url, auth=AUTH)
        # 如果状态码是20x 则获取成功
        print(rep.status_code)
        if str(rep.status_code).startswith("20"):
            jsonrep = json.loads(rep.text)
            items = jsonrep['items']
            for itemJson in items:
                item = itemJson['HostRoles']['component_name']

                # 排除client 角色，与SQOOP等一直是启动状态的客户端，这些不需要启动，也不需要判断状态
                if "CLIENT" not in item and "SQOOP" not in item and "INFRA_SOLR" not in item:
                    component_status = getComponentStatus(host, item)
                    # INSTALLED 表示已安装没有启动，我们默认 INSTALLED 的组件没有 STARTED 就是 停止，要发告警信息
                    if component_status == "INSTALLED":
                        # {'DATANODE': 'STARTED', 'HBASE_REGIONSERVER': 'STARTED'}
                        component_dict[item] = component_status
        else:
            # 没有正常获取到状态
            print("没有正常获取到状态")
    except Exception as e:
        print(e)
    return component_dict


def msg(text, api_url):
    """
    :param text: 告警文本
    :param api_url: 钉钉URL
    :return:
    """
    json_text = {
        "msgtype": "text",
        "text": {
            "content": text
        }, "at": {
            "atMobiles": ["1786881xxxx"]
        }

    }
    requests.post(api_url, json.dumps(json_text), headers=headers).content


component_dict = getHostComponentsStatus(hostname)
for compo_dict in component_dict.items():
    compo_dict_len = int(len(component_dict))
    if compo_dict_len > 50:  # 告警信息条数判断，告警信息太频繁钉钉告警可能会阻塞告警
        time.sleep(30)
    component_name = compo_dict[0]
    now_time = time.localtime(time.time())
    formatted_time = time.strftime('%Y-%m-%d %H:%M:%S', now_time)
    text = "告警对象：IP：" + ambari_server_ip + ' 主机名：' + hostname + ' \n组件名称：' + component_name + " \n告警内容：HDP 集群组件 " + component_name + " 停止运行" + "\n告警时间：" + formatted_time
    time.sleep(2) # 告警匀速 发出 
    msg(text, api_url)

钉钉告警发送成功：

【Ambari】Python调用Rest API 获取集群状态信息并发送钉钉告警

🍁 博主 "开着拖拉机回家"带您 Go to New World.✨🍁

一、概述

二、集群版本信息

三、组件状态信息获取

四、DataNode 启动

五、Python 实现 Rest API获取组件状态并告警