python Elasticsearch5.x使用

文档：http://elasticsearch-py.readthedocs.io/en/master/

Elasticsearch官方API文档：https://www.elastic.co/guide/en/elasticsearch/reference/current/search.html

两种方式现实Elasticsearch API操作

方式一：安装elasticsearch模块，通过它操作Elasticsearch，代码示例如下

"""
pip install elasticsearch
"""

from elasticsearch import Elasticsearch


class ElasticSearchClass(object):

    def __init__(self, host, port, user, passwrod):
        self.host = host
        self.port = port
        self.user = user
        self.password = passwrod
        self.connect()

    def connect(self):
        self.es = Elasticsearch(hosts=[{'host': self.host, 'port': self.port}],
                                http_auth=(self.user, self.password ))

    def count(self, indexname):
        """
        :param indexname:
        :return: 统计index总数
        """
        return self.es.count(index=indexname)

    def delete(self, indexname, doc_type, id):
        """
        :param indexname:
        :param doc_type:
        :param id:
        :return: 删除index中具体的一条
        """
        self.es.delete(index=indexname, doc_type=doc_type, id=id)

    def get(self, indexname, id):
        return self.es.get(index=indexname, id=id)

    def search(self, indexname, size=10):
        try:
            return self.es.search(index=indexname, size=size, sort="@timestamp:desc")
        except Exception as err:
            print(err)

方式二：安装requests模块，通过GET、POST方式操作Elasticsearch

class RequestsElasticSearchClass(object):

    def __init__(self, host, port, user, passwrod):
        self.url = 'http://' + host + ':' + str(port)
        basicpwd = base64.b64encode((user + ':' + passwrod).encode('UTF-8'))
        self.headers = {"User-Agent": "shhnwangjian",
                        "Content-Type": "application/json",
                        "Authorization": "Basic {}".format(basicpwd.decode('utf-8'))}

    def search(self, indexname, size=10):
        gettdata = {"sort": "@timestamp:desc",
                    "size": size}
        url = self.url + '/' + indexname + '/_search'
        ret = requests.get(url, headers=self.headers, timeout=10, params=gettdata)
        print(ret.text)

备注：python3.6.1版本