Struct CapacityGroup 

pub struct CapacityGroup {
    pub group_id: String,
    pub instance_type: Option<String>,
    pub profile: Option<MachineProfile>,
    pub min_size: u32,
    pub max_size: u32,
    pub scale_policy: Option<CapacityGroupScalePolicy>,
    pub nested_virtualization: Option<bool>,
}

Capacity group definition.

A capacity group represents machines with identical hardware profiles. Each group becomes a separate Auto Scaling Group (AWS), Managed Instance Group (GCP), or VM Scale Set (Azure).

Fields

group_id: String

Unique identifier for this capacity group (must be lowercase alphanumeric with hyphens)

instance_type: Option<String>

Provider machine selected at deployment time. alien.ts should declare portable requirements; preflight materialization fills this field from StackSettings.compute.

profile: Option<MachineProfile>

Machine resource profile (auto-derived from instance_type if not specified)

min_size: u32

Minimum number of machines (can be 0 for scale-to-zero)

max_size: u32

Maximum number of machines (must be ≤ 10)

scale_policy: Option<CapacityGroupScalePolicy>

Source-declared scale policy and installer-editable bounds.

Older stacks only have minSize and maxSize; planners derive an exact fixed/autoscale policy from those selected bounds when this field is absent.

nested_virtualization: Option<bool>

Require instance types that expose nested virtualization (VT-x/EPT) to guest VMs. This is needed by workloads that boot nested VMs inside containers. When true, the controller’s instance-type selector is constrained to a vetted nested-virt-capable allowlist.

Implementations

impl CapacityGroup

pub fn aws_root_volume_size_gib(&self) -> i32

AWS root volume size, including filesystem headroom and runtime overhead.

pub fn aws_runtime_data_volume_size_gib(&self) -> Option<i32>

AWS second EBS volume: the declared data disk, or for a nested virtualization pool without one, the volume such pools have always received, sized from ephemeral storage.

pub fn disks_differ(&self, other: &CapacityGroup) -> bool

Whether other asks for different disks than this group: another root storage size or data disk. Runtime controllers replace machines for it.

pub fn data_disk_size_gib(&self) -> Option<u64>

Declared data disk size, rounded up to a whole GiB.

Trait Implementations

impl Clone for CapacityGroup

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CapacityGroup

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CapacityGroup

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for CapacityGroup

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for CapacityGroup

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CapacityGroup