ubicloud/spec/model/vm_spec.rb

# frozen_string_literal: true

require_relative "spec_helper"

RSpec.describe Vm do
  subject(:vm) { described_class.new(display_state: "creating", created_at: Time.now) }

  describe "#display_state" do
    it "returns deleting if destroy semaphore increased" do
      expect(vm).to receive(:semaphores).and_return([instance_double(Semaphore, name: "destroy")]).at_least(:once)
      expect(vm.display_state).to eq("deleting")
    end

    it "returns restarting if restart semaphore increased" do
      expect(vm).to receive(:semaphores).and_return([instance_double(Semaphore, name: "restart")]).at_least(:once)
      expect(vm.display_state).to eq("restarting")
    end

    it "returns stopped if stop semaphore increased" do
      expect(vm).to receive(:semaphores).and_return([instance_double(Semaphore, name: "stop")]).at_least(:once)
      expect(vm.display_state).to eq("stopped")
    end

    it "returns waiting for capacity if semaphore increased" do
      expect(vm).to receive(:semaphores).and_return([instance_double(Semaphore, name: "waiting_for_capacity")]).at_least(:once)
      expect(vm.display_state).to eq("waiting for capacity")
    end

    it "returns no capacity available if it's waiting capacity more than 15 minutes" do
      expect(vm).to receive(:created_at).and_return(Time.now - 16 * 60)
      expect(vm).to receive(:semaphores).and_return([instance_double(Semaphore, name: "waiting_for_capacity")]).at_least(:once)
      expect(vm.display_state).to eq("no capacity available")
    end

    it "return same if semaphores not increased" do
      expect(vm.display_state).to eq("creating")
    end
  end

  describe "#cloud_hypervisor_cpu_topology" do
    it "scales a single-socket hyperthreaded system" do
      vm.family = "standard"
      vm.cores = 2
      vm.vcpus = 4
      expect(vm).to receive(:vm_host).and_return(instance_double(
        VmHost,
        total_cpus: 12,
        total_cores: 6,
        total_dies: 1,
        total_sockets: 1
      )).at_least(:once)
      expect(vm.cloud_hypervisor_cpu_topology.to_s).to eq("2:2:1:1")
    end

    it "scales a dual-socket hyperthreaded system" do
      vm.family = "standard"
      vm.cores = 2
      vm.vcpus = 4
      expect(vm).to receive(:vm_host).and_return(instance_double(
        VmHost,
        total_cpus: 24,
        total_cores: 12,
        total_dies: 2,
        total_sockets: 2
      )).at_least(:once)
      expect(vm.cloud_hypervisor_cpu_topology.to_s).to eq("2:2:1:1")
    end

    it "crashes if total_cpus is not multiply of total_cores" do
      expect(vm).to receive(:vm_host).and_return(instance_double(
        VmHost,
        total_cpus: 3,
        total_cores: 2
      )).at_least(:once)

      expect { vm.cloud_hypervisor_cpu_topology }.to raise_error RuntimeError, "BUG"
    end

    it "crashes if total_dies is not a multiple of total_sockets" do
      expect(vm).to receive(:vm_host).and_return(instance_double(
        VmHost,
        total_cpus: 24,
        total_cores: 12,
        total_dies: 3,
        total_sockets: 2
      )).at_least(:once)

      expect { vm.cloud_hypervisor_cpu_topology }.to raise_error RuntimeError, "BUG"
    end

    it "crashes if cores allocated per die is not uniform number" do
      vm.family = "standard"
      vm.cores = 2
      vm.vcpus = 4

      expect(vm).to receive(:vm_host).and_return(instance_double(
        VmHost,
        total_cpus: 1,
        total_cores: 1,
        total_dies: 1,
        total_sockets: 1
      )).at_least(:once)

      expect { vm.cloud_hypervisor_cpu_topology }.to raise_error RuntimeError, "BUG: need uniform number of cores allocated per die"
    end
  end

  describe "#update_spdk_version" do
    let(:vmh) { create_vm_host }

    before do
      expect(vm).to receive(:vm_host).and_return(vmh)
    end

    it "can update spdk version" do
      spdk_installation = SpdkInstallation.create(version: "b", allocation_weight: 100, vm_host_id: vmh.id) { _1.id = vmh.id }
      volume_dataset = instance_double(Sequel::Dataset)
      expect(vm).to receive(:vm_storage_volumes_dataset).and_return(volume_dataset)
      expect(volume_dataset).to receive(:update).with(spdk_installation_id: spdk_installation.id)
      expect(vm).to receive(:incr_update_spdk_dependency)

      vm.update_spdk_version("b")
    end

    it "fails if spdk installation not found" do
      expect { vm.update_spdk_version("b") }.to raise_error RuntimeError, "SPDK version b not found on host"
    end
  end

  describe "#utility functions" do
    it "can compute the ipv4 addresses" do
      as_ad = instance_double(AssignedVmAddress, ip: NetAddr::IPv4Net.new(NetAddr.parse_ip("1.1.1.0"), NetAddr::Mask32.new(32)))
      expect(vm).to receive(:assigned_vm_address).and_return(as_ad).at_least(:once)
      expect(vm.ephemeral_net4.to_s).to eq("1.1.1.0")
      expect(vm.ip4.to_s).to eq("1.1.1.0/32")
    end

    it "can compute nil if ipv4 is not assigned" do
      expect(vm.ephemeral_net4).to be_nil
    end
  end

  it "initiates a new health monitor session" do
    vh = instance_double(VmHost, sshable: instance_double(Sshable))
    expect(vm).to receive(:vm_host).and_return(vh).at_least(:once)
    expect(vh.sshable).to receive(:start_fresh_session)
    vm.init_health_monitor_session
  end

  it "checks pulse" do
    session = {
      ssh_session: instance_double(Net::SSH::Connection::Session)
    }
    pulse = {
      reading: "down",
      reading_rpt: 5,
      reading_chg: Time.now - 30
    }

    expect(vm).to receive(:inhost_name).and_return("vmxxxx").at_least(:once)
    expect(session[:ssh_session]).to receive(:exec!).and_return("active\nactive\n")
    expect(vm.check_pulse(session: session, previous_pulse: pulse)[:reading]).to eq("up")

    expect(session[:ssh_session]).to receive(:exec!).and_return("active\ninactive\n")
    expect(vm).to receive(:reload).and_return(vm)
    expect(vm).to receive(:incr_checkup)
    expect(vm.check_pulse(session: session, previous_pulse: pulse)[:reading]).to eq("down")

    expect(session[:ssh_session]).to receive(:exec!).and_raise Sshable::SshError
    expect(vm).to receive(:reload).and_return(vm)
    expect(vm).to receive(:incr_checkup)
    expect(vm.check_pulse(session: session, previous_pulse: pulse)[:reading]).to eq("down")
  end

  it "returns storage volumes hash list" do
    boot_image = instance_double(BootImage, name: "boot_image", version: "1")
    storage_device = instance_double(StorageDevice, name: "default")
    volumes = [
      instance_double(VmStorageVolume, disk_index: 0, device_id: "dev1",
        size_gib: 1, boot: true, boot_image: boot_image,
        key_encryption_key_1: "key", spdk_version: "spdk1",
        use_bdev_ubi: false, skip_sync: false,
        storage_device: storage_device, max_ios_per_sec: nil,
        max_read_mbytes_per_sec: nil, max_write_mbytes_per_sec: nil),
      instance_double(VmStorageVolume, disk_index: 1, device_id: "dev2",
        size_gib: 100, boot: false, boot_image: nil,
        key_encryption_key_1: nil, spdk_version: "spdk2",
        use_bdev_ubi: true, skip_sync: true,
        storage_device: storage_device, max_ios_per_sec: 100,
        max_read_mbytes_per_sec: 200, max_write_mbytes_per_sec: 300)
    ]
    expect(vm).to receive(:vm_storage_volumes).and_return(volumes)
    expect(vm.storage_volumes).to eq([
      {"boot" => true, "image" => "boot_image", "image_version" => "1", "size_gib" => 1,
       "device_id" => "dev1", "disk_index" => 0, "encrypted" => true,
       "spdk_version" => "spdk1", "use_bdev_ubi" => false, "skip_sync" => false,
       "storage_device" => "default", "read_only" => false,
       "max_ios_per_sec" => nil, "max_read_mbytes_per_sec" => nil,
       "max_write_mbytes_per_sec" => nil},
      {"boot" => false, "image" => nil, "image_version" => nil, "size_gib" => 100,
       "device_id" => "dev2", "disk_index" => 1, "encrypted" => false,
       "spdk_version" => "spdk2", "use_bdev_ubi" => true, "skip_sync" => true,
       "storage_device" => "default", "read_only" => false,
       "max_ios_per_sec" => 100, "max_read_mbytes_per_sec" => 200,
       "max_write_mbytes_per_sec" => 300}
    ])
  end

  describe "#VmSize options" do
    it "no burstable cpu allowed for Standard VMs" do
      expect(Option::VmSizes.map { _1.name.include?("standard-") == (_1.cpu_burst_percent_limit == 0) }.all?(true)).to be true
    end

    it "no gpu allowed for non-GPU VMs" do
      expect(Option::VmSizes.map { _1.name.include?("gpu") == _1.gpu }.all?(true)).to be true
    end

    it "cpu limit set correctly for each architecture" do
      expect(Option::VmSizes.map {
        if _1.arch == "x64"
          _1.cpu_percent_limit == _1.vcpus * 100 && _1.cores == _1.vcpus / 2
        elsif _1.arch == "arm64"
          _1.cpu_percent_limit == _1.vcpus * 100 && _1.cores == _1.vcpus
        end
      }.all?(true)).to be true
    end
  end
end