Attach existing instances to the group.
curl --request POST \ --url https://stratum.example.com/v1/projects/example/asg/groups/example/actions/attach-instances \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data '{ "instanceIds": [ "example" ] }'. Each instance gets the group’s stratum.dev/asg
attribution tag and a member row with launchReason: attached; the
group’s desired size grows by the count (bounded by maxSize — 400
when the attach would exceed it). 409 when an instance already belongs
to a group. Cedar-gated on asg:AttachInstances.
Authorizations
Section titled “Authorizations”Parameters
Section titled “Parameters”Path Parameters
Section titled “Path Parameters”Request Bodyrequired
Section titled “Request Bodyrequired”object
Existing instances in the project, each running (or starting), on one of the group’s subnets and not a member of any group. All or nothing.
Example generated
{ "instanceIds": [ "example" ]}Responses
Section titled “Responses”The new member rows (Pending until the controller observes them running).
object
object
The exact ltv-… the instance was launched from (empty for adopted/attached instances).
Why the controller terminated it: scale_in, replace_unhealthy, replaced_externally_terminated, group_deleted, az_rebalance, instance_refresh, hook_abandoned.
Target groups the instance is currently registered with.
While draining, when the controller will ask Compute to terminate.
The lifecycle hook holding the instance in a :Wait state.
When the hook times out to its default result; pushed by heartbeats.
The verdict recorded (by a caller or the timeout) once the row moved to :Proceed.
Example
{ "items": [ { "launchReason": "scale_out", "lifecycleState": "Pending", "healthStatus": "Healthy", "hookResult": "CONTINUE" } ]}Bad request.
object
The findings of a rejected IAM policy document (custom and resource policies).
One finding of a rejected IAM policy document. A rejection lists every finding, so the author fixes the document in one round trip.
object
The finding, e.g. INVALID_DOCUMENT, UNKNOWN_ACTION, ACTION_NOT_APPLICABLE.
Index of the statement at fault; -1 for the document as a whole.
The offending action, where one is at fault (ACTION_NOT_APPLICABLE).
Field errors, for codes that carry them: each problem at its field
(see FieldError). Documented on the responses that set it, e.g.
approveNodeJoin’s INVALID_INPUT and JOIN_APPROVAL_REFUSED.
Absent otherwise.
One field’s problem, the stage-2 installer API’s shape.
field is the field’s path, message what is wrong with it.
object
The field’s path, e.g. links[0].interface, disks[1].confirm,
mgmt.address or role; empty for the whole request.
Structured facts about the refusal, for codes that carry them. The
shape is fixed per code and documented on the response that answers
it, e.g. IMAGE_POOL_MISMATCH (see ImagePoolMismatchDetails) and
IMAGE_IN_USE. Absent for codes that carry none.
object
Example
{ "issues": [ { "code": "ACTION_NOT_APPLICABLE", "action": "compute:CreateVpc" } ]}Authenticated but not authorized.
object
The findings of a rejected IAM policy document (custom and resource policies).
One finding of a rejected IAM policy document. A rejection lists every finding, so the author fixes the document in one round trip.
object
The finding, e.g. INVALID_DOCUMENT, UNKNOWN_ACTION, ACTION_NOT_APPLICABLE.
Index of the statement at fault; -1 for the document as a whole.
The offending action, where one is at fault (ACTION_NOT_APPLICABLE).
Field errors, for codes that carry them: each problem at its field
(see FieldError). Documented on the responses that set it, e.g.
approveNodeJoin’s INVALID_INPUT and JOIN_APPROVAL_REFUSED.
Absent otherwise.
One field’s problem, the stage-2 installer API’s shape.
field is the field’s path, message what is wrong with it.
object
The field’s path, e.g. links[0].interface, disks[1].confirm,
mgmt.address or role; empty for the whole request.
Structured facts about the refusal, for codes that carry them. The
shape is fixed per code and documented on the response that answers
it, e.g. IMAGE_POOL_MISMATCH (see ImagePoolMismatchDetails) and
IMAGE_IN_USE. Absent for codes that carry none.
object
Example
{ "issues": [ { "code": "ACTION_NOT_APPLICABLE", "action": "compute:CreateVpc" } ]}Resource not found.
object
The findings of a rejected IAM policy document (custom and resource policies).
One finding of a rejected IAM policy document. A rejection lists every finding, so the author fixes the document in one round trip.
object
The finding, e.g. INVALID_DOCUMENT, UNKNOWN_ACTION, ACTION_NOT_APPLICABLE.
Index of the statement at fault; -1 for the document as a whole.
The offending action, where one is at fault (ACTION_NOT_APPLICABLE).
Field errors, for codes that carry them: each problem at its field
(see FieldError). Documented on the responses that set it, e.g.
approveNodeJoin’s INVALID_INPUT and JOIN_APPROVAL_REFUSED.
Absent otherwise.
One field’s problem, the stage-2 installer API’s shape.
field is the field’s path, message what is wrong with it.
object
The field’s path, e.g. links[0].interface, disks[1].confirm,
mgmt.address or role; empty for the whole request.
Structured facts about the refusal, for codes that carry them. The
shape is fixed per code and documented on the response that answers
it, e.g. IMAGE_POOL_MISMATCH (see ImagePoolMismatchDetails) and
IMAGE_IN_USE. Absent for codes that carry none.
object
Example
{ "issues": [ { "code": "ACTION_NOT_APPLICABLE", "action": "compute:CreateVpc" } ]}Conflicting state.
object
The findings of a rejected IAM policy document (custom and resource policies).
One finding of a rejected IAM policy document. A rejection lists every finding, so the author fixes the document in one round trip.
object
The finding, e.g. INVALID_DOCUMENT, UNKNOWN_ACTION, ACTION_NOT_APPLICABLE.
Index of the statement at fault; -1 for the document as a whole.
The offending action, where one is at fault (ACTION_NOT_APPLICABLE).
Field errors, for codes that carry them: each problem at its field
(see FieldError). Documented on the responses that set it, e.g.
approveNodeJoin’s INVALID_INPUT and JOIN_APPROVAL_REFUSED.
Absent otherwise.
One field’s problem, the stage-2 installer API’s shape.
field is the field’s path, message what is wrong with it.
object
The field’s path, e.g. links[0].interface, disks[1].confirm,
mgmt.address or role; empty for the whole request.
Structured facts about the refusal, for codes that carry them. The
shape is fixed per code and documented on the response that answers
it, e.g. IMAGE_POOL_MISMATCH (see ImagePoolMismatchDetails) and
IMAGE_IN_USE. Absent for codes that carry none.
object
Example
{ "issues": [ { "code": "ACTION_NOT_APPLICABLE", "action": "compute:CreateVpc" } ]}