Dynamic Scaling of instance is not working after upgrading to ACS Version 4.19.1.2 from 4.18.2.4

[shaerul]

Dynamic Scaling of instance is not working after upgrading to ACS Version 4.19.1.2 from 4.18.2.4

Following a recent upgrade from Apache CloudStack (ACS) 4.18.2.4 to 4.19.1.2, I’ve encountered an issue with the Dynamic Scaling of Instances feature, which was functioning perfectly in the previous version (4.18).

I have verified all necessary configurations, including:

• Template settings
• Compute offerings
• Global variable "enable.dynamic.scale.vm" (confirmed as enabled)
• Instance settings (Dynamic Scaling checkbox is selected)

Additionally, I performed a fresh installation to rule out configuration errors, yet the issue persists. Despite thorough checks, the root cause remains unclear.

Could you please provide assistance to resolve this?

Thank you.

[slavkap]

I could reproduce this on the main branch. The problem is with the SQL query but I don't have much time to investigate it further.
When you use the UI to scale a VM CloudStack lists the service offerings by the VM ID but doesn't show the correct one.

(local) 🐵 > list serviceofferings virtualmachineid=19d46ac4-7797-4087-b250-b8a06cbee7ad
{
  "count": 1,
  "serviceoffering": [
    {
      "cacheMode": "none",
      "cpunumber": 1,
      "cpuspeed": 500,
      "created": "2024-10-23T09:25:59+0300",
      "defaultuse": false,
      "diskofferingstrictness": false,
      "displaytext": "ssd",
      "dynamicscalingenabled": true,
      "encryptroot": false,
      "hasannotations": false,
      "id": "aa030ef7-5530-4ebb-86db-114fd2272ecf",
      "iscustomized": false,
      "issystem": false,
      "isvolatile": false,
      "limitcpuuse": false,
      "memory": 512,
      "name": "ssd",
      "offerha": false,
      "provisioningtype": "thin",
      "rootdisksize": 0,
      "serviceofferingdetails": {
        "zoneid": "1"
      },
      "state": "Active",
      "storagetags": "ssd",
      "storagetype": "shared",
      "zone": "Zone-A",
      "zoneid": "da1636ce-d63f-4b4e-8be8-c9e21d1f4e11"
    }
  ]
}

(local) 🐵 > list virtualmachines id=19d46ac4-7797-4087-b250-b8a06cbee7ad
{
  "count": 1,
  "virtualmachine": [
    {
      "account": "admin",
      "affinitygroup": [],
      "cpunumber": 1,
      "cpuspeed": 500,
      "cpuused": "12.93%",
      "created": "2024-10-29T09:17:45+0200",
      "deleteprotection": false,
      "details": {
        "Message.ReservedCapacityFreed.Flag": "false",
        "cpuNumber": "1",
        "cpuSpeed": "500",
        "memory": "512",
        "rootdisksize": "10"
      },
      "diskioread": 0,
      "diskiowrite": 5,
      "diskkbsread": 0,
      "diskkbswrite": 28,
      "displayname": "VM-19d46ac4-7797-4087-b250-b8a06cbee7ad",
      "displayvm": true,
      "domain": "ROOT",
      "domainid": "a012f313-9054-11ef-9555-02000a021706",
      "domainpath": "/",
      "guestosid": "a185c875-9054-11ef-9555-02000a021706",
      "haenable": false,
      "hasannotations": false,
      "hostcontrolstate": "Enabled",
      "hostid": "2aede50a-8d22-41fd-b1e0-9374516e0590",
      "hostname": "lab-cs-dev-a1-block-server-mgmt-bridge",
      "hypervisor": "KVM",
      "id": "19d46ac4-7797-4087-b250-b8a06cbee7ad",
      "instancename": "i-2-64-VM",
      "ipaddress": "10.2.32.39",
      "isdynamicallyscalable": true,
      "lastupdated": "2024-10-29T09:24:43+0200",
      "memory": 512,
      "memoryintfreekbs": -1,
      "memorykbs": 524288,
      "memorytargetkbs": 524288,
      "name": "VM-19d46ac4-7797-4087-b250-b8a06cbee7ad",
      "networkkbsread": 1,
      "networkkbswrite": 0,
      "nic": [
        {
          "broadcasturi": "vlan://untagged",
          "deviceid": "0",
          "extradhcpoption": [],
          "gateway": "10.2.32.253",
          "id": "5b6e83f9-dedb-4dcc-be7b-696b5049e7fd",
          "ipaddress": "10.2.32.39",
          "isdefault": true,
          "macaddress": "1e:00:95:00:00:30",
          "netmask": "255.255.255.0",
          "networkid": "f594dcc9-50cb-490d-b223-4e3cec3849fc",
          "networkname": "defaultGuestNetwork",
          "secondaryip": [],
          "traffictype": "Guest",
          "type": "Shared"
        }
      ],
      "osdisplayname": "CentOS 5.6 (64-bit)",
      "ostypeid": "a185c875-9054-11ef-9555-02000a021706",
      "passwordenabled": false,
      "pooltype": "StorPool",
      "receivedbytes": 12039,
      "rootdeviceid": 0,
      "rootdevicetype": "ROOT",
      "securitygroup": [
        {
          "account": "admin",
          "description": "Default Security Group",
          "egressrule": [],
          "id": "0f9e7f5b-9055-11ef-9555-02000a021706",
          "ingressrule": [],
          "name": "default",
          "tags": [],
          "virtualmachineids": []
        }
      ],
      "sentbytes": 10536,
      "serviceofferingid": "b68fc191-8164-45dd-bb53-d6697e7bc7c6",
      "serviceofferingname": "ssd-cust",
      "state": "Running",
      "tags": [],
      "templatedisplaytext": "StorPool_Template",
      "templateformat": "QCOW2",
      "templateid": "c0498940-40a5-4a89-9de1-ec1b49cb459d",
      "templatename": "StorPool--0MBHPN",
      "templatetype": "USER",
      "userid": "0f9dfce8-9055-11ef-9555-02000a021706",
      "username": "admin",
      "zoneid": "da1636ce-d63f-4b4e-8be8-c9e21d1f4e11",
      "zonename": "Zone-A"
    }
  ]
}

The correct service offering of the VM:

(local) 🐵 > list serviceofferings id=b68fc191-8164-45dd-bb53-d6697e7bc7c6
{
  "count": 1,
  "serviceoffering": [
    {
      "cacheMode": "none",
      "created": "2024-10-28T11:41:54+0200",
      "defaultuse": false,
      "diskofferingstrictness": false,
      "displaytext": "ssd-cust",
      "dynamicscalingenabled": true,
      "encryptroot": false,
      "hasannotations": false,
      "id": "b68fc191-8164-45dd-bb53-d6697e7bc7c6",
      "iscustomized": true,
      "issystem": false,
      "isvolatile": false,
      "limitcpuuse": false,
      "name": "ssd-cust",
      "offerha": false,
      "provisioningtype": "thin",
      "rootdisksize": 0,
      "serviceofferingdetails": {
        "zoneid": "1"
      },
      "state": "Active",
      "storagetags": "ssd",
      "storagetype": "shared",
      "zone": "Zone-A",
      "zoneid": "da1636ce-d63f-4b4e-8be8-c9e21d1f4e11"
    }
  ]
}

[shaerul]

@slavkap Thanks for your reply. Is it an inherent problem of 4.19?

[winterhazel]

Hi @shaerul,

This is a regression introduced in 4.19.1.0; 4.19.0.x should be fine.

I already opened a PR to fix this issue (#9894), and the patch should be available on 4.19.2.0.

While 4.19.2.0 doesn't come out, a temporary workaround would be to perform the dynamic scale by directly calling the API through CloudMonkey.

(admin) 🐵 > scale virtualmachine id=<id_of_the_vm> serviceofferingid=<id_of_the_service_offering> details[0].cpuNumber=<number_of_cpus> details[0].memory=<memory_in_mbs>