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GitWeb","url":"https://opendev.org/openstack/nova/commit/7a3a8f325ef6eaa97de1cf74efbaa0079f61a9e6"}]}],"author":{"name":"Matt Riedemann","email":"mriedem.os@gmail.com","date":"2019-04-04 17:04:33.000000000","tz":-240},"committer":{"name":"Matt Riedemann","email":"mriedem.os@gmail.com","date":"2019-07-23 22:49:49.000000000","tz":0},"subject":"Handle Invalid exceptions as expected in attach_interface","message":"Handle Invalid exceptions as expected in attach_interface\n\nThe bug prompting this is a tempest test which is requesting\na port attachment to a server but not specifying a port or\nnetwork to use, so nova-compute looks for a valid network\nand finds there are two and raises NetworkAmbiguous. This\nis treated as a 400 error in the API but because this is a\nsynchronous RPC call from nova-api to nova-compute,\noslo.messaging logs an exception traceback for the unexpected\nerror. That traceback is pretty gross in the compute logs for\nsomething that is a user error and the cloud operator has\nnothing to do to fix it.\n\nWe can handle the traceback by registering our expected\nexceptions for the attach_interface method with oslo.messaging,\nwhich is what this change does.\n\nWhile looking to just add NetworkAmbiguous it became clear that\nlots of different user errors can be raised from this method\nand none of those should result in a traceback, so this change\njust expects Invalid and its subclasses.\n\nThe one exception is InterfaceAttachFailed which is raised when\nsomething in allocate_port_for_instance or driver.attach_interface\nfails. That is an unexpected situation so the parent class for\nInterfaceAttachFailed is changed from Invalid to NovaException so\nit continues to be traced in the logs as an exception.\nInterfaceAttachFailedNoNetwork is kept as Invalid since it is a\nuser error (trying to attach an interface when the user has no\naccess to any networks).\n\ntest_tagged_attach_interface_raises is adjusted to show the\nExpectedException handling for one of the Invalid cases.\n\nChange-Id: I927ff1d8c8f45405833d6012b7d7af37b98b10a0\nCloses-Bug: #1823198\n(cherry picked from commit ade6c9393632e830c2368825568769853fce3b99)\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/e9261764c90403d1b2e33790be96efea89068427"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/e9261764c90403d1b2e33790be96efea89068427"}]},"branch":"refs/heads/stable/stein"}},"requirements":[],"submit_records":[],"submit_requirements":[]}