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Cannot perform HTTP GET inside container from python script

I have a simple container running a python script which needs to perform a HTTP GET. Problem is, ping works fine, both resolving the name with mDNS as well as with standard IP.
However, the HTTP GET does not work and the script hangs on it. Clearly the same script outside the container works just fine. This is the errors I am getting:
>>> requests.get("http://iot-ns-controller.local:8081")
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/urllib3/connection.py", line 174, in _new_conn
conn = connection.create_connection(
File "/usr/lib/python3.10/site-packages/urllib3/util/connection.py", line 95, in create_connection
raise err
File "/usr/lib/python3.10/site-packages/urllib3/util/connection.py", line 85, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/urllib3/connectionpool.py", line 703, in urlopen
httplib_response = self._make_request(
File "/usr/lib/python3.10/site-packages/urllib3/connectionpool.py", line 398, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.10/site-packages/urllib3/connection.py", line 239, in request
super(HTTPConnection, self).request(method, url, body=body, headers=headers)
File "/usr/lib/python3.10/http/client.py", line 1282, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.10/http/client.py", line 1328, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.10/http/client.py", line 1277, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.10/http/client.py", line 1037, in _send_output
self.send(msg)
File "/usr/lib/python3.10/http/client.py", line 975, in send
self.connect()
File "/usr/lib/python3.10/site-packages/urllib3/connection.py", line 205, in connect
conn = self._new_conn()
File "/usr/lib/python3.10/site-packages/urllib3/connection.py", line 186, in _new_conn
raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7faa6658a0>: Failed to establish a new connection: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/requests/adapters.py", line 489, in send
resp = conn.urlopen(
File "/usr/lib/python3.10/site-packages/urllib3/connectionpool.py", line 787, in urlopen
retries = retries.increment(
File "/usr/lib/python3.10/site-packages/urllib3/util/retry.py", line 592, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='iot-ns-controller.local', port=8081): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7faa6658a0>: Failed to establish a new connection: [Errno 111] Connection refused'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.10/site-packages/requests/api.py", line 73, in get
return request("get", url, params=params, **kwargs)
File "/usr/lib/python3.10/site-packages/requests/api.py", line 59, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3.10/site-packages/requests/sessions.py", line 587, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3.10/site-packages/requests/sessions.py", line 701, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3.10/site-packages/requests/adapters.py", line 565, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='iot-ns-controller.local', port=8081): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7faa6658a0>: Failed to establish a new connection: [Errno 111] Connection refused'))
It also does not work if I query host.docker.internal and I get the same error

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /blockchain (Caused by NewConnect

enter image description herethis is my code where i get stuck
Traceback (most recent call last):
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connection.py", line 159, in _new_conn
conn = connection.create_connection(
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\util\connection.py", line 84, in create_connection
raise err
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\util\connection.py", line 74, in create_connection
sock.connect(sa)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connectionpool.py", line 670, in urlopen
httplib_response = self._make_request(
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connectionpool.py", line 392, in _make_request
conn.request(method, url, **httplib_request_kw)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1282, in request
self._send_request(method, url, body, headers, encode_chunked)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1328, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1277, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 1037, in _send_output
self.send(msg)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\http\client.py", line 975, in send
self.connect()
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connection.py", line 187, in connect
conn = self._new_conn()
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connection.py", line 171, in _new_conn
raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x000001AD66840430>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\adapters.py", line 439, in send
resp = conn.urlopen(
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\connectionpool.py", line 726, in urlopen
retries = retries.increment(
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\urllib3\util\retry.py", line 446, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /blockchain (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x000001AD66840430>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 187, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 146, in _get_module_details
return _get_module_details(pkg_main_name, error)
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.752.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 110, in _get_module_details
__import__(pkg_name)
File "C:\Users\annun\python-blockchain\backend\app\__init__.py", line 82, in <module>
result = requests.get(f'http://localhost:{ROOT_PORT}/blockchain')
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "C:\Users\annun\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\requests\adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /blockchain (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x000001AD66840430>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))

Post your code, with your question. Not the error report, we can't do anything with just the error report. It's not OUR code you're reporting on.
It does however look like you might've entered the wrong domain/IP to connect to, but since it's localhost you've probably misconfigured it.

Ibis create impala table with pandas dataframe and get [Error 61] Connection refused

After doing impyla sql statement, I convert the results into pandas dataframe format. But now I want to auto create a temporary table on impala using Apache Ibis to create table and load a dataframe into it.
The following codes are divided into 3 phase:
phase 1 creates a null table with user-defined schema
phase 2 creates a table which schema and data are came from another table
phase 3 is the main part I want to do (suppose the dataframe is given)
and error code shows below. Does anyone know what happened it is? Cuz the configurations are the same, I don't know why it will get connection exception when doing phase 3.
Thank you a lot !
import ibis
import os
import pandas as pd
hdfs_host = os.environ.get('IBIS_TEST_NN_HOST', 'xx.xx.xx.xx')
hdfs_port = int(os.environ.get('IBIS_TEST_NN_PORT', 50070))
impala_host = os.environ.get('IBIS_TEST_IMPALA_HOST', 'xx.xx.xx.xx')
impala_port = int(os.environ.get('IBIS_TEST_IMPALA_PORT', 21050))
hdfs = ibis.hdfs_connect(host=hdfs_host, port=hdfs_port)
client = ibis.impala.connect(
host=impala_host,
port=impala_port,
hdfs_client=hdfs,
)
print(hdfs) # doctest: +ELLIPSIS
print(client) # doctest: +ELLIPSIS
db=client.database('tmp')
table = db.test_table
schema = table.schema()
--------------------------------------------------------------------------phase 1
table_name = 'tmp.test1'
if not client.exists_table(table_name):
db.create_table(table_name, schema=schema)
--------------------------------------------------------------------------phase 2
table_name = 'tmp.test2'
expr = table.group_by('id').size()
if not client.exists_table(table_name):
db.create_table(table_name,expr,format='parquet')
--------------------------------------------------------------------------phase 3
data = pd.DataFrame({'foo': [1, 2, 3, 4], 'bar': ['a', 'b', 'c', 'd']})
table_name = 'tmp.test3'
if not client.exists_table(table_name):
db.create_table(table_name, data)
And the results show that :
<ibis.filesystems.WebHDFS object at 0x10f2195f8>
<ibis.impala.client.ImpalaClient object at 0x10f201860>
Traceback (most recent call last):
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/util/connection.py", line 84, in create_connection
raise err
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/util/connection.py", line 74, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connectionpool.py", line 677, in urlopen
chunked=chunked,
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connectionpool.py", line 392, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connection.py", line 187, in connect
conn = self._new_conn()
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connection.py", line 172, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x10f26c2b0>: Failed to establish a new connection: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/connectionpool.py", line 725, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/urllib3/util/retry.py", line 439, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='xx.xx.xx.xx', port=50070): Max retries exceeded with url: /webhdfs/v1/tmp/ibis/pandas_600666daa0c247daba610fd5b640525e?user.name=xy.l.&op=MKDIRS (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x10f26c2b0>: Failed to establish a new connection: [Errno 61] Connection refused',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/xy.l./Import_table/test.py", line 37, in <module>
db.create_table(table_name, data)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/ibis/impala/client.py", line 39, in create_table
table_name, obj=obj, database=self.name, **kwargs
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/ibis/impala/client.py", line 1171, in create_table
writer, to_insert = write_temp_dataframe(self, obj)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/ibis/impala/pandas_interop.py", line 117, in write_temp_dataframe
path = writer.write_temp_csv()
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/ibis/impala/pandas_interop.py", line 45, in write_temp_csv
self.hdfs.mkdir(temp_hdfs_dir)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/ibis/filesystems.py", line 511, in mkdir
self.client.makedirs(dir_path)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/hdfs/client.py", line 986, in makedirs
self._mkdirs(hdfs_path, permission=permission)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/hdfs/client.py", line 125, in api_handler
raise err
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/hdfs/client.py", line 107, in api_handler
**self.kwargs
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/hdfs/client.py", line 214, in _request
**kwargs
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/requests/sessions.py", line 643, in send
r = adapter.send(request, **kwargs)
File "/Users/xy.l./.local/share/virtualenvs/Import_table-UzARfE0y/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='xx.xx.xx.xx', port=50070): Max retries exceeded with url: /webhdfs/v1/tmp/ibis/pandas_600666daa0c247daba610fd5b640525e?user.name=xy.l.&op=MKDIRS (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x10f26c2b0>: Failed to establish a new connection: [Errno 61] Connection refused',))
Regards, XY.Ltw

Solved. Our environment is CDH6.3.2 and I check the Namenode web ui port dfs.namenode.http-address on CM is 9870 instead of 50070. Change hdfs client connection conf. on the code above and it will work well

Python request fails from google cloud platform (app engine & cloud shell)

I have a very simple python http request which works on my local machine, but does not work in google app engine or from the google cloud shell. There must be config that is messing with the request, but I can't seem to find the problem.
I am using python 3.7
The code that causes the exception is the following (I have replaced the actual URL by example.com)
(The service I need to call is listening on port 6123)
import requests
myrequest = requests.get("http://example.com:6123/something?param=123")
The full error message I get is the following:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 672, in urlopen
chunked=chunked,
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 387, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/local/lib/python3.7/http/client.py", line 1229, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/local/lib/python3.7/http/client.py", line 1275, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/local/lib/python3.7/http/client.py", line 1224, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/local/lib/python3.7/http/client.py", line 1016, in _send_output
self.send(msg)
File "/usr/local/lib/python3.7/http/client.py", line 956, in send
self.connect()
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 184, in connect
conn = self._new_conn()
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line 169, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f0b242cd710>: Failed to establish a new connection: [Errno -2] Name or service not known
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line 720, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/usr/local/lib/python3.7/site-packages/urllib3/util/retry.py", line 436, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='example.com', port=6123): Max retries exceeded with url: /something?param=123 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f0b242cd710>: Failed to establish a new connection: [Errno -2] Name or service not known'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='example.com', port=6123): Max retries exceeded with url: /something?param=123 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f0b242cd710>: Failed to establish a new connection: [Errno -2] Name or service not known'))

Domain is not available from the outside, only from local network. Thanks Dustin Ingram!

django-elasticsearch error : [Errno -2] Name or service not known

I'm trying to install an application developed by someone else and when running a manage.py command I'm getting this error, which I do not understand. I wonder if anyone can tell me where to look to investigate first - thank you.
POST http://elasticsearch:9200/_bulk?refresh=true [status:N/A request:0.001s]
Traceback (most recent call last):
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/django/db/models/query.py", line 486, in get_or_create
return self.get(**lookup), False
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/djmoney/models/managers.py", line 209, in wrapper
queryset = func(*args, **kwargs)
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/django/db/models/query.py", line 399, in get
self.model._meta.object_name
providers.models.Organisation.DoesNotExist: Organisation matching query does not exist.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/util/connection.py", line 57, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/usr/lib/python3.6/socket.py", line 745, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/elasticsearch/connection/http_urllib3.py", line 95, in perform_request
response = self.pool.urlopen(method, url, body, retries=False, headers=self.headers, **kw)
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connectionpool.py", line 641, in urlopen
_stacktrace=sys.exc_info()[2])
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/util/retry.py", line 344, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/packages/six.py", line 686, in reraise
raise value
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connectionpool.py", line 603, in urlopen
chunked=chunked)
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connectionpool.py", line 355, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1254, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1300, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1249, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1036, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 974, in send
self.connect()
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connection.py", line 183, in connect
conn = self._new_conn()
File "/home/henry/.virtualenvs/hjsm/lib/python3.6/site-packages/urllib3/connection.py", line 169, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f506c988eb8>: Failed to establish a new connection: [Errno -2] Name or service not known
EDIT
Added manage.py as requested
#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault('DEPLOY_ENV', 'local')
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'core.settings.%s' % os.environ['DEPLOY_ENV'])
from django.core.management import execute_from_command_line # noqa
execute_from_command_line(sys.argv)

As Goran said, I was trying to connect to elasticsearch:9200 but testing localhost:9200