kubernetes/kops · error

error updating TargetPools for InstanceGroupManager: %v

Error message

error updating TargetPools for InstanceGroupManager: %v

What it means

Wrapped error from InstanceGroupManager.RenderGCE when the InstanceGroupManagers.SetTargetPools call fails while reconciling target-pool membership on an existing IGM (changes.TargetPools != nil). The underlying cause is in the %v detail — commonly a target pool that is missing, in the wrong region, or a transient API error.

Source

Thrown at upup/pkg/fi/cloudup/gcetasks/instancegroupmanager.go:140

	if a == nil {
		if i.TargetSize == 0 {
			// TargetSize 0 will normally be omitted by the marshaling code; we need to force it
			i.ForceSendFields = append(i.ForceSendFields, "TargetSize")
		}
		op, err := t.Cloud.Compute().InstanceGroupManagers().Insert(t.Cloud.Project(), *e.Zone, i)
		if err != nil {
			return fmt.Errorf("error creating InstanceGroupManager: %v", err)
		}

		if err := t.Cloud.WaitForOp(op); err != nil {
			return fmt.Errorf("error creating InstanceGroupManager: %v", err)
		}
	} else {
		if changes.TargetPools != nil {
			op, err := t.Cloud.Compute().InstanceGroupManagers().SetTargetPools(t.Cloud.Project(), *e.Zone, i.Name, i.TargetPools)
			if err != nil {
				return fmt.Errorf("error updating TargetPools for InstanceGroupManager: %v", err)
			}

			if err := t.Cloud.WaitForOp(op); err != nil {
				return fmt.Errorf("error updating TargetPools for InstanceGroupManager: %v", err)
			}

			changes.TargetPools = nil
		}

		if changes.InstanceTemplate != nil {
			op, err := t.Cloud.Compute().InstanceGroupManagers().SetInstanceTemplate(t.Cloud.Project(), *e.Zone, i.Name, instanceTemplateURL)
			if err != nil {
				return fmt.Errorf("error updating InstanceTemplate for InstanceGroupManager: %v", err)
			}

			if err := t.Cloud.WaitForOp(op); err != nil {
				return fmt.Errorf("error updating InstanceTemplate for InstanceGroupManager: %v", err)
			}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Check the wrapped API error for the exact reason
2. Verify all target pools referenced by the IGM exist in the same region
3. Retry after fixing references or transient API conditions

When it happens

Trigger: Thrown at upup/pkg/fi/cloudup/gcetasks/instancegroupmanager.go:140 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/a527b93b42451cc3. Report an issue: GitHub.