OperationalError 無法連接到服務器：連接被拒絕

Question

服務器是否在主機“localhost”(127.0.0.1) 上運行並接受端口 5432 上的 TCP/IP 連接？

嘗試將我的 Django 應用程序部署到 Heroku 並不斷收到以下錯誤。 我不確定從哪里開始......我嘗試殺死端口 5432 上的所有進程並重新啟動 Postgres，但我不太熟悉如何在 Heroku 上配置數據庫。 謝謝你的幫助。

我不太確定從哪里開始。 我一直在使用 Heroku 開發指南並在谷歌上搜索錯誤。 大多數解決方案似乎都說要重新啟動 Postgres，但對我不起作用。

2020-03-25T05:12:41.000000+00:00 app[api]: Build started by user X@gmail.com
2020-03-25T05:13:20.394227+00:00 heroku[web.1]: Restarting
2020-03-25T05:13:20.397813+00:00 heroku[web.1]: State changed from up to starting
2020-03-25T05:13:20.175463+00:00 app[api]: Deploy a13facac by user X@gmail.com
2020-03-25T05:13:20.175463+00:00 app[api]: Release v18 created by user X@gmail.com
2020-03-25T05:13:21.365822+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2020-03-25T05:13:21.584742+00:00 heroku[web.1]: Process exited with status 0
2020-03-25T05:13:21.376200+00:00 app[web.1]: [2020-03-25 05:13:21 +0000] [9] [INFO] Worker exiting (pid: 9)
2020-03-25T05:13:21.377965+00:00 app[web.1]: [2020-03-25 05:13:21 +0000] [4] [INFO] Handling signal: term
2020-03-25T05:13:21.377967+00:00 app[web.1]: [2020-03-25 05:13:21 +0000] [10] [INFO] Worker exiting (pid: 10)
2020-03-25T05:13:21.477875+00:00 app[web.1]: [2020-03-25 05:13:21 +0000] [4] [INFO] Shutting down: Master
2020-03-25T05:13:24.895930+00:00 heroku[web.1]: Starting process with command `gunicorn life_cal.wsgi --log-file -`
2020-03-25T05:13:28.209650+00:00 app[web.1]: [2020-03-25 05:13:28 +0000] [4] [INFO] Starting gunicorn 20.0.4
2020-03-25T05:13:28.210642+00:00 app[web.1]: [2020-03-25 05:13:28 +0000] [4] [INFO] Listening at: http://0.0.0.0:19437 (4)
2020-03-25T05:13:28.210794+00:00 app[web.1]: [2020-03-25 05:13:28 +0000] [4] [INFO] Using worker: sync
2020-03-25T05:13:28.216086+00:00 app[web.1]: [2020-03-25 05:13:28 +0000] [9] [INFO] Booting worker with pid: 9
2020-03-25T05:13:28.232500+00:00 app[web.1]: [2020-03-25 05:13:28 +0000] [10] [INFO] Booting worker with pid: 10
2020-03-25T05:13:29.297468+00:00 heroku[web.1]: State changed from starting to up
2020-03-25T05:13:30.000000+00:00 app[api]: Build succeeded
2020-03-25T05:14:56.281785+00:00 heroku[router]: at=info method=GET path="/" host=life-cal.herokuapp.com request_id=a1ca2bf8-9a81-4692-a776-15a9c3e0fd8f fwd="75.7.0.23" dyno=web.1 connect=1ms service=168ms status=500 bytes=228464 protocol=https
2020-03-25T05:14:56.269837+00:00 app[web.1]: Internal Server Error: /
2020-03-25T05:14:56.269861+00:00 app[web.1]: Traceback (most recent call last):
2020-03-25T05:14:56.269862+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 220, in ensure_connection
2020-03-25T05:14:56.269863+00:00 app[web.1]: self.connect()
2020-03-25T05:14:56.269863+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269864+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269864+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 197, in connect
2020-03-25T05:14:56.269865+00:00 app[web.1]: self.connection = self.get_new_connection(conn_params)
2020-03-25T05:14:56.269865+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269866+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269866+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 185, in get_new_connection
2020-03-25T05:14:56.269866+00:00 app[web.1]: connection = Database.connect(**conn_params)
2020-03-25T05:14:56.269867+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/psycopg2/__init__.py", line 126, in connect
2020-03-25T05:14:56.269867+00:00 app[web.1]: conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
2020-03-25T05:14:56.269868+00:00 app[web.1]: psycopg2.OperationalError: could not connect to server: Connection refused
2020-03-25T05:14:56.269868+00:00 app[web.1]: Is the server running on host "localhost" (127.0.0.1) and accepting
2020-03-25T05:14:56.269868+00:00 app[web.1]: TCP/IP connections on port 5432?
2020-03-25T05:14:56.269869+00:00 app[web.1]: 
2020-03-25T05:14:56.269869+00:00 app[web.1]: 
2020-03-25T05:14:56.269869+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2020-03-25T05:14:56.269870+00:00 app[web.1]: 
2020-03-25T05:14:56.269870+00:00 app[web.1]: Traceback (most recent call last):
2020-03-25T05:14:56.269870+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
2020-03-25T05:14:56.269871+00:00 app[web.1]: response = get_response(request)
2020-03-25T05:14:56.269871+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response
2020-03-25T05:14:56.269871+00:00 app[web.1]: response = self.process_exception_by_middleware(e, request)
2020-03-25T05:14:56.269872+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response
2020-03-25T05:14:56.269872+00:00 app[web.1]: response = wrapped_callback(request, *callback_args, **callback_kwargs)
2020-03-25T05:14:56.269873+00:00 app[web.1]: File "/app/cal/views.py", line 14, in index
2020-03-25T05:14:56.269873+00:00 app[web.1]: return render(request, 'cal/index.html', context)
2020-03-25T05:14:56.269873+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/shortcuts.py", line 19, in render
2020-03-25T05:14:56.269874+00:00 app[web.1]: content = loader.render_to_string(template_name, context, request, using=using)
2020-03-25T05:14:56.269874+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/loader.py", line 62, in render_to_string
2020-03-25T05:14:56.269875+00:00 app[web.1]: return template.render(context, request)
2020-03-25T05:14:56.269875+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/backends/django.py", line 61, in render
2020-03-25T05:14:56.269875+00:00 app[web.1]: return self.template.render(context)
2020-03-25T05:14:56.269876+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 171, in render
2020-03-25T05:14:56.269876+00:00 app[web.1]: return self._render(context)
2020-03-25T05:14:56.269883+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 163, in _render
2020-03-25T05:14:56.269883+00:00 app[web.1]: return self.nodelist.render(context)
2020-03-25T05:14:56.269884+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 936, in render
2020-03-25T05:14:56.269884+00:00 app[web.1]: bit = node.render_annotated(context)
2020-03-25T05:14:56.269884+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated
2020-03-25T05:14:56.269885+00:00 app[web.1]: return self.render(context)
2020-03-25T05:14:56.269885+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/loader_tags.py", line 150, in render
2020-03-25T05:14:56.269885+00:00 app[web.1]: return compiled_parent._render(context)
2020-03-25T05:14:56.269885+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 163, in _render
2020-03-25T05:14:56.269886+00:00 app[web.1]: return self.nodelist.render(context)
2020-03-25T05:14:56.269886+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 936, in render
2020-03-25T05:14:56.269886+00:00 app[web.1]: bit = node.render_annotated(context)
2020-03-25T05:14:56.269887+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated
2020-03-25T05:14:56.269887+00:00 app[web.1]: return self.render(context)
2020-03-25T05:14:56.269887+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/loader_tags.py", line 62, in render
2020-03-25T05:14:56.269888+00:00 app[web.1]: result = block.nodelist.render(context)
2020-03-25T05:14:56.269888+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 936, in render
2020-03-25T05:14:56.269888+00:00 app[web.1]: bit = node.render_annotated(context)
2020-03-25T05:14:56.269888+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/base.py", line 903, in render_annotated
2020-03-25T05:14:56.269889+00:00 app[web.1]: return self.render(context)
2020-03-25T05:14:56.269889+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/template/defaulttags.py", line 166, in render
2020-03-25T05:14:56.269901+00:00 app[web.1]: len_values = len(values)
2020-03-25T05:14:56.269902+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/models/query.py", line 258, in __len__
2020-03-25T05:14:56.269902+00:00 app[web.1]: self._fetch_all()
2020-03-25T05:14:56.269902+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/models/query.py", line 1261, in _fetch_all
2020-03-25T05:14:56.269903+00:00 app[web.1]: self._result_cache = list(self._iterable_class(self))
2020-03-25T05:14:56.269903+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/models/query.py", line 57, in __iter__
2020-03-25T05:14:56.269903+00:00 app[web.1]: results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
2020-03-25T05:14:56.269904+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/models/sql/compiler.py", line 1149, in execute_sql
2020-03-25T05:14:56.269904+00:00 app[web.1]: cursor = self.connection.cursor()
2020-03-25T05:14:56.269904+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269905+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269905+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 260, in cursor
2020-03-25T05:14:56.269905+00:00 app[web.1]: return self._cursor()
2020-03-25T05:14:56.269905+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 236, in _cursor
2020-03-25T05:14:56.269906+00:00 app[web.1]: self.ensure_connection()
2020-03-25T05:14:56.269906+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269906+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269907+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 220, in ensure_connection
2020-03-25T05:14:56.269907+00:00 app[web.1]: self.connect()
2020-03-25T05:14:56.269907+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/utils.py", line 90, in __exit__
2020-03-25T05:14:56.269907+00:00 app[web.1]: raise dj_exc_value.with_traceback(traceback) from exc_value
2020-03-25T05:14:56.269908+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 220, in ensure_connection
2020-03-25T05:14:56.269908+00:00 app[web.1]: self.connect()
2020-03-25T05:14:56.269908+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269908+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269909+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/base/base.py", line 197, in connect
2020-03-25T05:14:56.269909+00:00 app[web.1]: self.connection = self.get_new_connection(conn_params)
2020-03-25T05:14:56.269921+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
2020-03-25T05:14:56.269921+00:00 app[web.1]: return func(*args, **kwargs)
2020-03-25T05:14:56.269922+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 185, in get_new_connection
2020-03-25T05:14:56.269922+00:00 app[web.1]: connection = Database.connect(**conn_params)
2020-03-25T05:14:56.269922+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.8/site-packages/psycopg2/__init__.py", line 126, in connect
2020-03-25T05:14:56.269923+00:00 app[web.1]: conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
2020-03-25T05:14:56.269923+00:00 app[web.1]: django.db.utils.OperationalError: could not connect to server: Connection refused
2020-03-25T05:14:56.269924+00:00 app[web.1]: Is the server running on host "localhost" (127.0.0.1) and accepting
2020-03-25T05:14:56.269924+00:00 app[web.1]: TCP/IP connections on port 5432?
2020-03-25T05:14:56.269924+00:00 app[web.1]: 
2020-03-25T05:14:56.270758+00:00 app[web.1]: 10.95.191.28 - - [25/Mar/2020:05:14:56 +0000] "GET / HTTP/1.1" 500 228226 "https://dashboard.heroku.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.5 Safari/605.1.15"

Answer 1

我的 settings.py 沒有被推送到 Heroku，因為它列在我的 .gitignore 中。 一旦我刪除了它並根據 Heroku 文檔導入了 Django_heroku，我就能夠啟動並運行所有內容。