leolleeooleo edited a comment on issue #4936: URL: https://github.com/apache/cloudstack/issues/4936#issuecomment-825814783
I test this issue again. It does not happen with "Migrate Volume". It is happened by "Scale VM". Steps: 1. Create VM 2. Migrate instance to another host (Works fine) 3. Scale VM to any Compute Offering 4. Start Instance 5. Migrate instance to another host (Error) Migrating test-migrate (test-migrate) Exception during migrate: org.libvirt.LibvirtException: Unsafe migration: Migration may lead to data corruption if disks use cache != none or cache != directsync Before Scale VM The root disk Compute Offering was 20GB  After Scale VM The root disk Compute Offering change to 2C4G  Migrate instance Error  Before Scale VM ~~~ (localcloud) cloudstack > list virtualmachines id=644205e5-5a01-4a62-afac-6f03278e9886 { "count": 1, "virtualmachine": [ { "account": "D10307009", "affinitygroup": [], "cpunumber": 2, "cpuspeed": 2000, "cpuused": "4.43%", "created": "2021-04-23T23:12:52+0800", "details": { "Message.ReservedCapacityFreed.Flag": "false", "cpuOvercommitRatio": "32", "memoryOvercommitRatio": "1.0" }, "diskioread": 61817, "diskiowrite": 29704, "diskkbsread": 2835343, "diskkbswrite": 3974206, "diskofferingid": "ffe2070a-8c0b-4a66-9687-cbe70346fb6d", "diskofferingname": "20 GB", "displayname": "test-migrate", "displayvm": true, "domain": "ROOT", "domainid": "0805834e-d677-11ea-9082-ae75c86dd51b", "guestosid": "78c0272c-d677-11ea-9082-ae75c86dd51b", "haenable": false, "hypervisor": "KVM", "id": "644205e5-5a01-4a62-afac-6f03278e9886", "instancename": "i-4-174-VM", "isdynamicallyscalable": false, "memory": 2048, "memoryintfreekbs": 726916, "memorykbs": 2097152, "memorytargetkbs": 2097152, "name": "test-migrate", "networkkbsread": 1762540, "networkkbswrite": 13636, "nic": [ { "extradhcpoption": [], "gateway": "10.1.1.1", "id": "786197c8-08f2-4833-8c83-0c8453e1208d", "ipaddress": "10.1.1.202", "isdefault": true, "macaddress": "02:00:04:1d:00:25", "netmask": "255.255.255.0", "networkid": "2adaf3cc-b972-4aa6-9cfe-3eba40af3dcc", "networkname": "D10307009-net", "secondaryip": [], "traffictype": "Guest", "type": "Isolated" } ], "osdisplayname": "CentOS 8", "ostypeid": "78c0272c-d677-11ea-9082-ae75c86dd51b", "passwordenabled": false, "rootdeviceid": 0, "rootdevicetype": "ROOT", "securitygroup": [], "serviceofferingid": "5bb789af-886a-4609-b57d-de65de822c49", "serviceofferingname": "2C2G", "state": "Stopped", "tags": [], "templatedisplaytext": "CentOS 8 cckuo", "templateid": "99239f20-2562-4bf6-83bb-ff443e223138", "templatename": "CentOS 8", "userid": "fb425cb8-c816-43b1-9727-9ef22ab60904", "username": "D10307009", "zoneid": "80d5cccc-fabb-425b-89ff-ebb023da3d5d", "zonename": "T2-421" } ] } (localcloud) cloudstack > list volumes id=2618ddb8-2c43-4c10-bc95-b9c5f9cd15e4 { "count": 1, "volume": [ { "account": "D10307009", "clusterid": "a27d3806-48fa-4952-9545-f0a2a035d8a5", "clustername": "Dell PowerEdge R410", "created": "2021-04-24T00:38:30+0800", "destroyed": false, "deviceid": 0, "displayvolume": true, "domain": "ROOT", "domainid": "0805834e-d677-11ea-9082-ae75c86dd51b", "hypervisor": "KVM", "id": "2618ddb8-2c43-4c10-bc95-b9c5f9cd15e4", "isextractable": true, "name": "ROOT-174", "path": "f507992c-0cbe-4edf-ba9c-cc66aeea586c", "podid": "d3c4b2e6-2915-47be-a58d-424b55e56eee", "podname": "T2-421-1", "provisioningtype": "thin", "quiescevm": false, "serviceofferingdisplaytext": "20 GB", "serviceofferingid": "ffe2070a-8c0b-4a66-9687-cbe70346fb6d", "serviceofferingname": "20 GB", "size": 21474836480, "state": "Ready", "storage": "Volume01", "storageid": "7b3cb8ef-2fb7-3209-ace8-e9c7e7282489", "storagetype": "shared", "tags": [], "type": "ROOT", "virtualmachineid": "644205e5-5a01-4a62-afac-6f03278e9886", "vmdisplayname": "test-migrate", "vmname": "test-migrate", "vmstate": "Stopped", "zoneid": "80d5cccc-fabb-425b-89ff-ebb023da3d5d", "zonename": "T2-421" } ] } ~~~ After Scale VM ~~~ (localcloud) cloudstack > list volumes id=2618ddb8-2c43-4c10-bc95-b9c5f9cd15e4 { "count": 1, "volume": [ { "account": "D10307009", "clusterid": "a27d3806-48fa-4952-9545-f0a2a035d8a5", "clustername": "Dell PowerEdge R410", "created": "2021-04-24T00:38:30+0800", "destroyed": false, "deviceid": 0, "displayvolume": true, "domain": "ROOT", "domainid": "0805834e-d677-11ea-9082-ae75c86dd51b", "hypervisor": "KVM", "id": "2618ddb8-2c43-4c10-bc95-b9c5f9cd15e4", "isextractable": true, "name": "ROOT-174", "path": "f507992c-0cbe-4edf-ba9c-cc66aeea586c", "podid": "d3c4b2e6-2915-47be-a58d-424b55e56eee", "podname": "T2-421-1", "provisioningtype": "thin", "quiescevm": false, "serviceofferingdisplaytext": "2C4G", "serviceofferingid": "589766b7-ce4d-4baf-875c-9f6d1af7dba6", "serviceofferingname": "2C4G", "size": 21474836480, "state": "Ready", "storage": "Volume01", "storageid": "7b3cb8ef-2fb7-3209-ace8-e9c7e7282489", "storagetype": "shared", "tags": [], "type": "ROOT", "virtualmachineid": "644205e5-5a01-4a62-afac-6f03278e9886", "vmdisplayname": "test-migrate", "vmname": "test-migrate", "vmstate": "Stopped", "zoneid": "80d5cccc-fabb-425b-89ff-ebb023da3d5d", "zonename": "T2-421" } ] } ~~~ ~~~ (localcloud) cloudstack > list serviceofferings { "count": 13, "serviceoffering": [ { "cpunumber": 1, "cpuspeed": 500, "created": "2020-08-05T01:25:44+0800", "defaultuse": false, "displaytext": "Small Instance", "id": "a50d423e-1ca3-4daf-a764-d61df4f9a2b5", "iscustomized": false, "issystem": false, "isvolatile": false, "limitcpuuse": false, "memory": 512, "name": "Small Instance", "offerha": false, "provisioningtype": "thin", "rootdisksize": 0, "storagetype": "shared" }, { "cpunumber": 1, "cpuspeed": 1000, "created": "2020-08-05T01:25:44+0800", "defaultuse": false, "displaytext": "Medium Instance", "id": "48ddc666-3a67-4593-b435-9fb9f76d3991", "iscustomized": false, "issystem": false, "isvolatile": false, "limitcpuuse": false, "memory": 1024, "name": "Medium Instance", "offerha": false, "provisioningtype": "thin", "rootdisksize": 0, "storagetype": "shared" }, { "cacheMode": "writeback", "cpunumber": 2, "cpuspeed": 2000, "created": "2020-08-06T22:11:21+0800", "defaultuse": false, "displaytext": "2C2G", "id": "5bb789af-886a-4609-b57d-de65de822c49", "iscustomized": false, "issystem": false, "isvolatile": false, "limitcpuuse": false, "memory": 2048, "name": "2C2G", "offerha": false, "provisioningtype": "thin", "rootdisksize": 0, "storagetype": "shared" }, { "cacheMode": "writeback", "cpunumber": 2, "cpuspeed": 2000, "created": "2020-08-06T22:13:20+0800", "defaultuse": false, "displaytext": "2C4G", "id": "589766b7-ce4d-4baf-875c-9f6d1af7dba6", "iscustomized": false, "issystem": false, "isvolatile": false, "limitcpuuse": false, "memory": 4096, "name": "2C4G", "offerha": false, "provisioningtype": "thin", "rootdisksize": 0, "storagetype": "shared" }, ~~~ ~~~ (localcloud) cloudstack > list diskofferings { "count": 5, "diskoffering": [ { "created": "2020-08-05T01:25:44+0800", "disksize": 5, "displayoffering": true, "displaytext": "5 GB", "id": "0c1afda9-a17e-4b1a-a7ea-ea87d85e7015", "iscustomized": false, "name": "5 GB", "provisioningtype": "thin", "storagetype": "shared" }, { "created": "2020-08-05T01:25:44+0800", "disksize": 20, "displayoffering": true, "displaytext": "20 GB", "id": "ffe2070a-8c0b-4a66-9687-cbe70346fb6d", "iscustomized": false, "name": "20 GB", "provisioningtype": "thin", "storagetype": "shared" }, { "created": "2020-08-05T01:25:44+0800", "disksize": 100, "displayoffering": true, "displaytext": "100 GB", "id": "1a9cbe1e-a824-405b-8f79-16796b781fc3", "iscustomized": false, "name": "100 GB", "provisioningtype": "thin", "storagetype": "shared" }, { "cacheMode": "none", "created": "2021-01-14T22:21:58+0800", "disksize": 500, "displayoffering": true, "displaytext": "500 GB", "id": "fa9ace64-4d92-4a02-b124-a3239713d377", "iscustomized": false, "name": "500 GB", "provisioningtype": "thin", "storagetype": "shared" }, { "created": "2020-08-05T01:25:44+0800", "disksize": 0, "displayoffering": true, "displaytext": "Custom Disk", "id": "0dc9045c-12ba-464d-be6c-fecc9feda9dc", "iscustomized": true, "name": "Custom", "provisioningtype": "thin", "storagetype": "shared" } ] } ~~~ -- This is an automated message from the Apache Git Service. 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