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Therefore, the use\nof host aggregates and linking/binding these aggregates with \"flavor\nfamilies\" is used to separate physical server characteristics such as\nphysical servers with processors AMD, Intel (different families), and so\non.\n\nHowever, OpenStack (Nova) allows the resize of a VM instance between\nflavors that have different aggregates, which will trigger a VM machine\nto a physical server where the processor might be different, or where it\nmight have some characteristic that breaks the resize because it\ntriggers a VM migration as well.\n\nThis patch might also be useful to address/work around the situation\nreported in [1], where a resizing is moving a VM between Nova hosts that\nhave been set up differently. In scenarios where the Nova hosts are\nconfigured differently, such as some with a Ceph backend and others with\na local NVME SSD for Nova disks, these host groups are segregated into\nhost aggregates, and then the allocation of VMs on them is controlled by\ndifferent flavor families.  Therefore, this patch can also be useful to\navoid misunderstandings and data loss that happens if we allow such a\nprocess (because Nova is not prepared to execute the migration of Nova\ndisks between different storage backends/setups).\n\n[1] https://bugs.launchpad.net/nova/+bug/1803331\n\nChange-Id: I7498cab86329b6b5dcd17be9bfa8099dba515efd\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/abd55de592df56fb504d9b441236cce6d60ff50b"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/abd55de592df56fb504d9b441236cce6d60ff50b"}]},"branch":"refs/heads/master"},"a3ceb3825c80d347ea58563d811906001259757e":{"kind":"REWORK","_number":2,"created":"2024-06-20 18:33:19.000000000","uploader":{"_account_id":28356,"name":"Rafael Weingartner","email":"rafael@apache.org","username":"rafaelweingartner"},"ref":"refs/changes/21/922421/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/nova","ref":"refs/changes/21/922421/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/nova refs/changes/21/922421/2"}}},"commit":{"parents":[{"commit":"7dc4b1ea627d864a0ee2745cc9de4336fc0ba7b5","subject":"Merge \"add functional repoducer for bug 2065927\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/7dc4b1ea627d864a0ee2745cc9de4336fc0ba7b5"}]}],"author":{"name":"Rafael Weingärtner","email":"rafael@apache.org","date":"2024-06-20 16:19:24.000000000","tz":-180},"committer":{"name":"Rafael Weingärtner","email":"rafael@apache.org","date":"2024-06-20 18:32:55.000000000","tz":-180},"subject":"Block VM instance resize to flavor with different aggregates","message":"Block VM instance resize to flavor with different aggregates\n\nWhen deploying an OpenStack cloud, one normally segregates/separates the\nhosts on the cloud according to their capabilities. Therefore, the use\nof host aggregates and linking/binding these aggregates with \"flavor\nfamilies\" is used to separate physical server characteristics such as\nphysical servers with processors AMD, Intel (different families), and so\non.\n\nHowever, OpenStack (Nova) allows the resize of a VM instance between\nflavors that have different aggregates, which will trigger a VM machine\nto a physical server where the processor might be different, or where it\nmight have some characteristic that breaks the resize because it\ntriggers a VM migration as well.\n\nThis patch might also be useful to address/work around the situation\nreported in [1], where a resizing is moving a VM between Nova hosts that\nhave been set up differently. In scenarios where the Nova hosts are\nconfigured differently, such as some with a Ceph backend and others with\na local NVME SSD for Nova disks, these host groups are segregated into\nhost aggregates, and then the allocation of VMs on them is controlled by\ndifferent flavor families.  Therefore, this patch can also be useful to\navoid misunderstandings and data loss that happens if we allow such a\nprocess (because Nova is not prepared to execute the migration of Nova\ndisks between different storage backends/setups).\n\n[1] https://bugs.launchpad.net/nova/+bug/1803331\n\nChange-Id: I7498cab86329b6b5dcd17be9bfa8099dba515efd\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a3ceb3825c80d347ea58563d811906001259757e"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/a3ceb3825c80d347ea58563d811906001259757e"}]},"branch":"refs/heads/master"},"b5b6c000c174f451a2639c6179b3c0465ccdff07":{"kind":"REWORK","_number":3,"created":"2024-06-20 18:35:36.000000000","uploader":{"_account_id":28356,"name":"Rafael Weingartner","email":"rafael@apache.org","username":"rafaelweingartner"},"ref":"refs/changes/21/922421/3","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/nova","ref":"refs/changes/21/922421/3","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/nova refs/changes/21/922421/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/nova refs/changes/21/922421/3"}}},"commit":{"parents":[{"commit":"7dc4b1ea627d864a0ee2745cc9de4336fc0ba7b5","subject":"Merge \"add functional repoducer for bug 2065927\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/7dc4b1ea627d864a0ee2745cc9de4336fc0ba7b5"}]}],"author":{"name":"Rafael Weingärtner","email":"rafael@apache.org","date":"2024-06-20 16:19:24.000000000","tz":-180},"committer":{"name":"Rafael Weingärtner","email":"rafael@apache.org","date":"2024-06-20 18:35:14.000000000","tz":-180},"subject":"Block VM instance resize to flavor with different aggregates","message":"Block VM instance resize to flavor with different aggregates\n\nWhen deploying an OpenStack cloud, one normally segregates/separates the\nhosts on the cloud according to their capabilities. Therefore, the use\nof host aggregates and linking/binding these aggregates with \"flavor\nfamilies\" is used to separate physical server characteristics such as\nphysical servers with processors AMD, Intel (different families), and so\non.\n\nHowever, OpenStack (Nova) allows the resize of a VM instance between\nflavors that have different aggregates, which will trigger a VM machine\nto a physical server where the processor might be different, or where it\nmight have some characteristic that breaks the resize because it\ntriggers a VM migration as well.\n\nThis patch might also be useful to address/work around the situation\nreported in [1], where a resizing is moving a VM between Nova hosts that\nhave been set up differently. In scenarios where the Nova hosts are\nconfigured differently, such as some with a Ceph backend and others with\na local NVME SSD for Nova disks, these host groups are segregated into\nhost aggregates, and then the allocation of VMs on them is controlled by\ndifferent flavor families.  Therefore, this patch can also be useful to\navoid misunderstandings and data loss that happens if we allow such a\nprocess (because Nova is not prepared to execute the migration of Nova\ndisks between different storage backends/setups).\n\n[1] https://bugs.launchpad.net/nova/+bug/1803331\n\nChange-Id: I7498cab86329b6b5dcd17be9bfa8099dba515efd\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/b5b6c000c174f451a2639c6179b3c0465ccdff07"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/nova/commit/b5b6c000c174f451a2639c6179b3c0465ccdff07"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[{"rule_name":"gerrit~DefaultSubmitRule","status":"OK","labels":[{"label":"Verified","status":"MAY","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"MAY","applied_by":{"_account_id":11604,"name":"sean mooney","email":"smooney@redhat.com","username":"sean-k-mooney"}},{"label":"Workflow","status":"MAY"},{"label":"Review-Priority","status":"MAY"}]}],"submit_requirements":[{"name":"Verified","description":"Verified in gate by CI","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Verified\u003dMAX AND -label:Verified\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Verified\u003dMAX","label:Verified\u003dMIN"],"atom_explanations":{"label:Verified\u003dMAX":"","label:Verified\u003dMIN":""}}},{"name":"Code-Review","description":"Code reviewed by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Code-Review\u003dMAX AND -label:Code-Review\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":["label:Code-Review\u003dMIN"],"failing_atoms":["label:Code-Review\u003dMAX"],"atom_explanations":{"label:Code-Review\u003dMAX":"","label:Code-Review\u003dMIN":""}}},{"name":"Review-Priority","description":"Review Priority","status":"NOT_APPLICABLE","is_legacy":false,"applicability_expression_result":{"fulfilled":false,"status":"FAIL"},"submittability_expression_result":{"expression":"is:true","fulfilled":true,"status":"NOT_EVALUATED","passing_atoms":[],"failing_atoms":[],"atom_explanations":{}}},{"name":"Workflow","description":"Approved for gate by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Workflow\u003dMAX AND -label:Workflow\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Workflow\u003dMAX","label:Workflow\u003dMIN"],"atom_explanations":{"label:Workflow\u003dMAX":"","label:Workflow\u003dMIN":""}}}]}