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CRAYSAT-956: Replace CAPMC client support with PCS
This commit implements a basic PCSClient class which is mostly compatible with the CAPMCClient class. Usage of the CAPMCClient class was replaced with the new PCSClient class.
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| Original file line number | Diff line number | Diff line change |
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| # | ||
| # MIT License | ||
| # | ||
| # (C) Copyright 2021-2024 Hewlett Packard Enterprise Development LP | ||
| # | ||
| # Permission is hereby granted, free of charge, to any person obtaining a | ||
| # copy of this software and associated documentation files (the "Software"), | ||
| # to deal in the Software without restriction, including without limitation | ||
| # the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| # and/or sell copies of the Software, and to permit persons to whom the | ||
| # Software is furnished to do so, subject to the following conditions: | ||
| # | ||
| # The above copyright notice and this permission notice shall be included | ||
| # in all copies or substantial portions of the Software. | ||
| # | ||
| # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | ||
| # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | ||
| # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
| # OTHER DEALINGS IN THE SOFTWARE. | ||
| """ | ||
| Basic client library for PCS. | ||
| """ | ||
| from collections import defaultdict | ||
|
|
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| from csm_api_client.service.gateway import APIError, APIGatewayClient | ||
| from csm_api_client.service.hsm import HSMClient | ||
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| class PCSError(APIError): | ||
| """An error occurred in PCS.""" | ||
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| def __init__(self, message, xname_errs=None): | ||
| """Create a new PCSError with the given message and info about the failing xnames. | ||
| Args: | ||
| message (str): the error message | ||
| xname_errs (list): a list of dictionaries representing the failures for | ||
| the individual components that failed. Each dict should have the | ||
| following keys: | ||
| e: the error code | ||
| err_msg: the error message | ||
| xname: the actual xname which failed | ||
| """ | ||
| self.message = message | ||
| self.xname_errs = xname_errs if xname_errs is not None else [] | ||
| self.xnames = [xname_err['xname'] for xname_err in self.xname_errs | ||
| if 'xname' in xname_err] | ||
|
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||
| def __str__(self): | ||
| """Convert to str.""" | ||
| if not self.xname_errs: | ||
| return self.message | ||
| else: | ||
| # A mapping from a tuple of (err_code, err_msg) to a list of xnames | ||
| # with that combination of err_code and err_msg. | ||
| xnames_by_err = defaultdict(list) | ||
| for xname_err in self.xname_errs: | ||
| xnames_by_err[(xname_err.get('e'), xname_err.get('err_msg'))].append(xname_err.get('xname')) | ||
|
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| xname_err_summary = '\n'.join([f'xname(s) ({", ".join(xnames)}) failed with ' | ||
| f'e={err_info[0]} and err_msg="{err_info[1]}"' | ||
| for err_info, xnames in xnames_by_err.items()]) | ||
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| return f'{self.message}\n{xname_err_summary}' | ||
|
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| class PCSClient(APIGatewayClient): | ||
| """Client for the Power Control Service.""" | ||
| base_resource_path = 'power-control/v1/' | ||
|
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| def set_xnames_power_state(self, xnames, power_state, force=False, recursive=False): | ||
| """Set the power state of the given xnames. | ||
| Args: | ||
| xnames (list): the xnames (str) to perform the power operation | ||
| against. | ||
| power_state (str): the desired power state. Either "on" or "off". | ||
| force (bool): if True, disable checks and force the power operation. | ||
| recursive (bool): if True, power on component and its descendants. | ||
| prereq (bool): if True, power on component and its ancestors. | ||
| Returns: | ||
| None | ||
| Raises: | ||
| ValueError: if the given `power_state` is not one of 'on' or 'off' | ||
| PCSError: if the attempt to power on/off the given xnames with PCS | ||
| fails. This exception contains more specific information about | ||
| the failure, which will be included in its __str__. | ||
| """ | ||
| allowed_states = {'on', 'off', 'soft-off', 'soft-restart', 'hard-restart', 'init', 'force-off'} | ||
| power_state = power_state.lower() | ||
| if power_state not in allowed_states: | ||
| allowed_states_str = ", ".join("\"" + state + "\"" for state in allowed_states) | ||
| raise ValueError(f'Invalid power state {power_state} given. Must be {allowed_states_str}') | ||
|
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| if force: | ||
| if power_state in {'off', 'soft-off'}: | ||
| power_state = 'force-off' | ||
| elif power_state == 'soft-restart': | ||
| power_state = 'hard-restart' | ||
|
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| target_xnames = set() | ||
| if recursive: | ||
| hsm_client = HSMClient(self.session) | ||
|
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| try: | ||
| for xname in xnames: | ||
| ct_inclusion = set() | ||
| if hsm_client.get_node_component_type(xname) == 'Chassis': | ||
| ct_inclusion.update(['RouterModule', 'ComputeModule', 'Node']) | ||
| elif hsm_client.get_node_component_type(xname) == 'ComputeModule': | ||
| ct_inclusion.update(['Node']) | ||
| # Include components based on types | ||
| target_xnames |= set( | ||
| component['XName'] | ||
| for component_type in ct_inclusion | ||
| for component in hsm_client.get_node_components(ancestor=xname, type=component_type) | ||
| ) | ||
| except APIError as err: | ||
| raise PCSError(f'Could not retrieve descendent components for xnames: {err}') from err | ||
|
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| # Check if target_xnames is empty after the previous if conditions | ||
| if not target_xnames: | ||
| target_xnames.update(xnames) | ||
|
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| params = { | ||
| 'operation': power_state, | ||
| 'taskDeadlineMinutes': -1, | ||
| 'location': [ | ||
| {'xname': xname} | ||
| for xname in target_xnames | ||
| ] | ||
| } | ||
| try: | ||
| self.post('transitions', json=params).json() | ||
| except APIError as err: | ||
| raise PCSError(f'Power {power_state} operation failed for xname(s).', | ||
| xname_errs=xnames) from err | ||
|
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| def get_xnames_power_state(self, xnames): | ||
| """Get the power state of the given xnames from PCS. | ||
| Args: | ||
| xnames (list): the xnames (str) to get power state for. | ||
| Returns: | ||
| dict: a dictionary whose keys are the power states and whose values | ||
| are lists of xnames in those power states. | ||
| Raises: | ||
| PCSError: if the request to get power state fails. | ||
| """ | ||
| xnames = set(xnames) | ||
| try: | ||
| resp = self.get('power-status', params={'xname': xnames}).json().get('status') | ||
| nodes_by_power_state = defaultdict(list) | ||
| for node in resp: | ||
| nodes_by_power_state[node['powerState']].append(node['xname']) | ||
| return nodes_by_power_state | ||
| except APIError as err: | ||
| raise PCSError(f'Failed to get power state of xname(s): {", ".join(xnames)}') from err | ||
|
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| def get_xname_power_state(self, xname): | ||
| """Get the power state of a single xname from PCS. | ||
| Args: | ||
| xname (str): the xname to get power state of | ||
| Returns: | ||
| str: the power state of the node | ||
| Raises: | ||
| PCSError: if the request to PCS fails or the expected information | ||
| is not returned by the PCS API. | ||
| """ | ||
| try: | ||
| resp = self.get('power-status', params={'xname': xname}).json().get('status') | ||
| except APIError as err: | ||
| raise PCSError(f'Failed to get power state for xname {xname}: {err}') from err | ||
|
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| matching_states = [node['powerState'] for node in resp | ||
| if node['xname'] == xname] | ||
| if not matching_states: | ||
| raise PCSError(f'Unable to determine power state of {xname}. Not ' | ||
| f'present in response from PCS: {resp}') | ||
| elif len(matching_states) > 1: | ||
| raise PCSError(f'Unable to determine power state of {xname}. PCS ' | ||
| f'reported multiple power states: {", ".join(matching_states)}') | ||
| return matching_states.pop() |
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