Return an error to user if querying data fails

[scottyeager]

Currently the bot just stays silent if it fails while querying some data to answer a user request (most notably /status). It would be better to catch the fact of a failure, such as timeout contacting graphql and give the user an error message instead.

Here's some example logs of the trace when graphql is down:

2024-11-06 18:42:48,335 - root - ERROR - Error fetching node data for check
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connection.py", line 174, in _new_conn
    conn = connection.create_connection(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/util/connection.py", line 95, in create_connection
    raise err
  File "/usr/local/lib/python3.10/dist-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/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 715, in urlopen
    httplib_response = self._make_request(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 404, in _make_request
    self._validate_conn(conn)
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 1058, in _validate_conn
    conn.connect()
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connection.py", line 363, in connect
    self.sock = conn = self._new_conn()
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connection.py", line 186, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f963c67c550>: 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/local/lib/python3.10/dist-packages/requests/adapters.py", line 486, in send
    resp = conn.urlopen(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 827, in urlopen
    return self.urlopen(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 827, in urlopen
    return self.urlopen(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 827, in urlopen
    return self.urlopen(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/connectionpool.py", line 799, in urlopen
    retries = retries.increment(
  File "/usr/local/lib/python3.10/dist-packages/urllib3/util/retry.py", line 592, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='graphql.grid.tf', port=443): Max retries exceeded with url: /graphql (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f963c67c550>: 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 "/root/node-status-bot/node-status-bot.py", line 104, in check_job
    updates = get_nodes(net, subbed_nodes)
  File "/root/node-status-bot/node-status-bot.py", line 246, in get_nodes
    nodes = graphql.nodes(['nodeID', 'twinID', 'updatedAt', 'power'],
  File "/usr/local/lib/python3.10/dist-packages/grid3/graphql.py", line 143, in build_dsl_query
    return self.execute_dsl_query(query)[query_field_name]
  File "/usr/local/lib/python3.10/dist-packages/grid3/graphql.py", line 71, in execute_dsl_query
    return self.client.execute(dsl_gql(DSLQuery(query)))
  File "/usr/local/lib/python3.10/dist-packages/gql/client.py", line 403, in execute
    return self.execute_sync(
  File "/usr/local/lib/python3.10/dist-packages/gql/client.py", line 221, in execute_sync
    return session.execute(
  File "/usr/local/lib/python3.10/dist-packages/gql/client.py", line 849, in execute
    result = self._execute(
  File "/usr/local/lib/python3.10/dist-packages/gql/client.py", line 758, in _execute
    result = self.transport.execute(
  File "/usr/local/lib/python3.10/dist-packages/gql/transport/requests.py", line 220, in execute
    response = self.session.request(
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/requests/adapters.py", line 519, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='graphql.grid.tf', port=443): Max retries exceeded with url: /graphql (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f963c67c550>: Failed to establish a new connection: [Errno 111] Connection refused'))