Attempting To View Logs With No Services Present Crashes `ec Monitor`
Attempting to View Logs with No Services Present Crashes ec monitor
ec monitor is a powerful tool for monitoring and managing Edge Containers. However, when attempting to view logs for a namespace with no custom services running, the program crashes. This article aims to reproduce the behavior, identify the root cause, and propose a solution to display a warning message instead of crashing.
To reproduce the behavior, follow these steps:
- Open
ec monitorfor a namespace with no custom services running: Launchec monitorand select a namespace with no custom services running. - Press the
lkey to view logs: Press thelkey to view the logs for the selected namespace. - Booted to command line with the error below: The program will crash and display the following error message:
โญโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ Traceback (most recent call last) โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฎ
โ /home/ryi58813/ec-venv/lib/python3.12/site-packages/edge_containers_cli/cmds/monitor.py:519 in action_ioc_logs โ
โ โ
โ 516 โ โญโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ locals โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฎ โ
โ 517 โ def action_ioc_logs(self) -> None: โ self = MonitorApp(title='i19-beamline Services Monitor', classes={'-dark-mode'}, pseudo_classes={'focus', 'dark'}) โ โ
โ 518 โ โ """Display the logs of the IOC that is currently highlighted.""" โฐโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฏ โ
โ โฑ 519 โ โ service_name = self._get_service_name() โ
โ 520 โ โ โ
โ 521 โ โ # Convert to corresponding bool โ
โ 522 โ โ ready = self._get_highlighted_cell("ready") == emoji.check_mark โ
โ โ
โ /home/ryi58813/ec-venv/lib/python3.12/site-packages/edge_containers_cli/cmds/monitor.py:472 in _get_service_name โ
โ โ
โ 469 โ โ return str(cell) โญโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ locals โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฎ โ
โ 470 โ โ self = MonitorApp(title='i19-beamline Services Monitor', classes={'-dark-mode'}, pseudo_classes={'focus', 'dark'}) โ โ
โ 471 โ def _get_service_name(self) -> str: โฐโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฏ โ
โ โฑ 472 โ โ service_name = self._get_highlighted_cell("name") โ
โ 473 โ โ return service_name โ
โ 474 โ โ
โ 475 โ def _do_confirmed_action(self, action: str, command: Callable): โ
โ โ
โ /home/ryi58813/ec-venv/lib/python3.12/site-packages/edge_containers_cli/cmds/monitor.py:463 in _get_highlighted_cell โ
โ โ
โ 460 โ โ assert isinstance(table, DataTable) โญโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ locals โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฎ โ
โ 461 โ โ # Fetches hightlighted row ID (integer) โ col_key = 'name' โ โ
โ 462 โ โ row = table.cursor_row โ row = 0 โ โ
โ โฑ 463 โ โ ioc_row = table.ordered_rows[row] โ self = MonitorApp(title='i19-beamline Services Monitor', classes={'-dark-mode'}, pseudo_classes={'focus', 'dark'}) โ โ
โ 464 โ โ col_keys = [ord_col.key.value for ord_col in table.ordered_columns] โ table = DataTable(id='body_table') โ โ
โ 465 โ โ col_i = col_keys.index(col_key) โฐโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฏ โ
โ 466 โ โ ioc_col = table.ordered_columns[col_i] โ
โฐโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ๏ฟฝ๏ฟฝโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโฏ
IndexError: list index out of range
The root cause of the issue is that the action_ioc_logs method is attempting to access the service_name attribute of the self object, which is None when there are no services present in the table. This causes an IndexError when trying to access the service_name attribute.
To fix the issue, we need to add a check to ensure that the service_name attribute is not None before attempting to access it. We can do this by adding a simple if statement to check if the service_name attribute is None before trying to access it.
Here is the modified code:
def action_ioc_logs(self) -> None:
"""Display the logs of the IOC that is currently highlighted."""
if self._get_service_name() is None:
# Display a warning message instead of crashing
print("Warning: No services present in the table.")
return
# Rest of the code remains the same
The program should not crash when attempting to view logs for a namespace with no custom services running. Instead, it should display a warning message indicating that no services are present in the table.
In conclusion, the issue of ec monitor crashing when attempting to view logs for a namespace with no custom services running is caused by an IndexError when trying to access the service_name attribute of the self object. By adding a simple if statement to check if the service_name attribute is None before attempting to access it, we can fix the issue and display a warning message instead of crashing.
Q&A: Attempting to View Logs with No Services Present Crashes ec monitor
In our previous article, we discussed the issue of ec monitor crashing when attempting to view logs for a namespace with no custom services running. We identified the root cause of the issue and proposed a solution to display a warning message instead of crashing. In this article, we will answer some frequently asked questions (FAQs) related to this issue.
A: The root cause of the issue is that the action_ioc_logs method is attempting to access the service_name attribute of the self object, which is None when there are no services present in the table. This causes an IndexError when trying to access the service_name attribute.
A: To fix the issue, you can add a simple if statement to check if the service_name attribute is None before attempting to access it. Here is an example of the modified code:
def action_ioc_logs(self) -> None:
"""Display the logs of the IOC that is currently highlighted."""
if self._get_service_name() is None:
# Display a warning message instead of crashing
print("Warning: No services present in the table.")
return
# Rest of the code remains the same
A: The service_name attribute is None when there are no services present in the table because the _get_service_name method is attempting to access the name column of the table, which does not exist when there are no services present.
A: To prevent the IndexError from occurring, you can add a check to ensure that the name column exists in the table before attempting to access it. Here is an example of the modified code:
def _get_service_name(self) -> str:
"""Get the service name from the table."""
if self.table.ordered_columns:
# Get the name column from the table
name_column = self.table.ordered_columns[0]
# Get the service name from the name column
service_name = name_column.value
return service_name
else:
# Return None if the table is empty
return None
A: The issue can have a significant impact on the user experience, as it can cause the ec monitor application to crash when attempting to view logs for a namespace with no custom services running. This can lead to frustration and confusion for users who are trying to troubleshoot issues with their Edge Containers.
A: To test the fix, you can create a test case that simulates the scenario where there are no services present in the table. You can then run the test case and verify that the ec monitor application displays a warning message instead of crashing.
In conclusion, the issue of ec monitor crashing when attempting to view logs for a namespace with no custom services running is a significant problem that can impact the user experience. By understanding the root cause of the issue and implementing a fix, we can prevent the IndexError from occurring and provide a better user experience for our users.