NewConnectionError(<urllib3.connection.HTTPConnection 对象位于 0x7f09b9f0a7c0>：无法建立新连接：[Errno 111]

Question

我正在尝试构建一个简单的django弹性搜索，它可以搜索汽车。但当我试图重新拒绝索引时，它会给我上面的错误。我正在关注这个文档->快速启动弹性搜索。。。下面给出了完整的回溯->

elasticsearch.exceptions.ConnectionError: ConnectionError(<urllib3.connection.HTTPConnection object at 0x7f09b9f0a7c0>: Failed to establish a new connection: [Errno 111] Connection refused) caused by: NewConnectionError(<urllib3.connection.HTTPConnection object at 0x7f09b9f0a7c0>: Failed to establish a new connection: [Errno 111] Connection refused)

我的模型.py是一个简单的汽车模型，有名称、颜色、描述和类型过滤器，我在文件中添加了这些过滤器

class Car(models.Model):
name = models.CharField(max_length=50)
color = models.CharField(max_length=50)
description = models.TextField()
type = models.IntegerField(choices=[
(1, "Sedan"),
(2, "Truck"),
(4, "SUV"),
])

我的documents.py文件->

from django_elasticsearch_dsl import Document
from django_elasticsearch_dsl.registries import registry
from .models import Car

@registry.register_document
class CarDocument(Document):
class Index:
name = 'cars'
settings = {'number_of_shards': 1,
'number_of_replicas': 0}
class Django:
model = Car
fields = [
'name',
'color',
'description',
'type',
]

但是当我试图重新拒绝索引时，它会给出新的连接错误。下面给出了我用于重建索引的命令->

python manage.py search_index --rebuild

Answer 1

首先，请确保您已经正确安装和配置了ElasticSearch服务(您可以使用此文档(。此错误表示您的代码无法使用当前配置连接到ElasticSearch服务。检查您的弹性服务是否已启动并运行。在基于Linux的操作系统中，您可以通过$ sudo systemctl status elasticsearch.service进行检查，在结果页面中，您应该看到Active: active (running)行。在此步骤之后，检查urlhttp://localhost:9200/(如果您没有更改默认设置(，如果一切正常，您应该会看到以下结果：

{
"name" : "some_name-System-Product-Name",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "erP_jdhLRvuwqLkx1_tehw",
"version" : {
"number" : "7.9.0",
"build_flavor" : "default",
"build_type" : "deb",
"build_hash" : "a479a2a7fce0389512d6a9361301708b92dff667",
"build_date" : "2020-08-11T21:36:48.204330Z",
"build_snapshot" : false,
"lucene_version" : "8.6.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"
}

您也可以使用$ sudo systemctl start elasticsearch.service启动此服务。另一种可能性是，您可能以错误的方式配置了弹性变量。例如，使用错误的端口代替默认端口(即9200(也会引发相同的错误。在下面的例子中，您可以看到一个弹性配置的例子，它将出现在您的项目的settings.py:中

# ElasticSearch configs
ELK_BASE_URL = 'elasticsearch://{username}:{password}@{host_ip}:{host_port}'
ELASTIC_SEARCH_URL = ELK_BASE_URL.format(
username='ELASTICSEARCH_USER',
password='ELASTICSEARCH_PASS',
host_ip='ELASTICSEARCH_HOST',
host_port='ELASTICSEARCH_PORT'
)
ELASTICSEARCH_DSL = {
'default': {
'hosts': [ELASTIC_SEARCH_URL]
},
}