Zed Series (4.2.0 - 4.3.x) Release Notes


Bug Fixes

  • Fixes bug where sushy would not pass a read/connect timeout through to requests when making requests to a redfish service. This means that an ill-timed failure could cause python processes calling sushy to freeze indefinately.

  • Add retries on iDRAC error with code SYS518 and message “iDRAC is currently unable to display any information because data sources are unavailable.” for all request types in addition to existing GET methods. This helps to fix a known intermittent issue when deleting set of volumes one after another and iDRAC is reloading after deleting each volume.

  • Fixes ‘Unsupported parameter name @Redfish.OperationApplyTime’ error on iDRAC firmware version or newer when deleting volumes.

  • Correctly handles error code Base.1.5.PropertyMissing when dealing with hardware that requires TransferProtocolType for virtual media operations.

  • An issue was encountered on some HPE iLO supported machines where the Baseboard Management Controller would respond with a HTTP 400 error and an error message indicating the requested operation was invalid for the then system state. For example, attempting to change the power state via the BMC shortly after previously changing the power state. We now attempt to retry within the permitted number of retries when this error is encountered.

  • Workaround for https://github.com/psf/requests/issues/3829 If the env REQUESTS_CA_BUNDLE is set the requests.Session() ignores the verify parameter. Therefore the verify parameter is moved directly into the function call of requests.


Bug Fixes

  • Adds an extra check for cases where the BMC provides a SettingsObject URI through @Redfish.Settings but this URI does not allow setting boot related attributes. Prior to sending a PATCH request to SettingsURI, a GET request is issued to verify if it contains the attributes to be updated. In case these attributes are missing, the request is made against System URI instead. Issues such as the one addressed with this change usually manifest themselves with a Redfish response containing an error message similar to the following: MessageId: Base.1.8.PropertyNotWritable, Message: The property BootSourceOverrideEnabled is a read only property and cannot be assigned a value.


Bug Fixes

  • To avoid timeouts with recent versions of firmwares we need to increase the number of server side retries. For example, in idrac firmware series 5.x the time gap between operations is almost 20 seconds instead of the 10 seconds in the 4.x series.


Bug Fixes

  • Alters eTag handling in PATCH requests: First, the original eTag is used. In case of a failure, if the eTag provided was weak, it is converted to a strong format by removing the weak prefix. If this approach is not applicable or fails, the final attempt is made omitting the eTag entirely. By taking this approach, no workarounds are applied if BMC is handling eTags as expected and in case of failures, known workarounds are attempted, improving overall resiliency.


New Features

  • Adds controllers property of Storage class that was introduced in Redfish v1.9 to replace storage_controllers deprecated in Redfish v1.13.

Bug Fixes

  • Fixes potential cases where exceptions from the underlying requests library may be raised up through sushy, resulting in client applications possibly not understanding that an error has occurred. The sushy ConnectionError exception is now returned upon any exception falling under RequestException from the requests library.


Bug Fixes

  • Fixes unreliable behavior with ETag interactions with some BMCs as opportunistic use of compressed responses may cause the BMC to change an ETag response to “Weak”, which is to be expected as an ETag represents an absolute byte-by-byte response consistency, and compression cannot reliably honor that contract. Introduction of a client perceiving a “Weak” ETag may not be expected by the server, and the server may reject responses because the ETag is not a “Strong” ETag when we respond or interact with a resource.

    As a result, requests no longer offer oppurtunistic compression of responses as an acceptable possibility, which overall has minimal impact, espescially when compared to the value of consistent BMC behavior and interaction.


Bug Fixes

  • Fixes an issue in the sushy connector object handling where a Sushy client utilizing basic authentication would not raise an AccessError exception once the credentials stopped working. We now explicitly check to see if basic authentication is in use, and raise the exception if an AccessError is encountered.


Bug Fixes

  • Fixes issues with the refresh of Session based authentication where a previous refresh attempt failing could result in a fallback to Basic authentication and would silently fail. The client library now attempts to re-authenticate.

  • Fixes silent failures when a refresh of an authentication Session fails and was unable to be re-established due to an AccessError. Should this occur, now the AccessError exception is explicitly raised as opposed to attempting to fall back to Basic authentication.

  • Fixes issues where the Session and Basic auth interface would fallback to Basic authentication should a ConnectionError exception occur while attempting to perform an authentication action. ConnectionError exceptions are signs of networking transport issues, and should be investigated. A ConnectionError exception is now raised.

  • Prevents the combined Session and Basic authentication support from falling back to Basic authentication once Session based authentication has been established. This should be considered a potential security issue or an environmental change requiring potential client re-initialization. This is exposed as an AccessError exception. Continued operations against the Sushy library will attempt to reauthenticate, if possible.