github.com/juju/juju@v0.0.0-20240430160146-1752b71fcf00/provider/gce/environ_policy.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package gce
     5  
     6  import (
     7  	"github.com/juju/errors"
     8  
     9  	"github.com/juju/juju/core/constraints"
    10  	"github.com/juju/juju/environs"
    11  	"github.com/juju/juju/environs/context"
    12  )
    13  
    14  // PrecheckInstance verifies that the provided series and constraints
    15  // are valid for use in creating an instance in this environment.
    16  func (env *environ) PrecheckInstance(ctx context.ProviderCallContext, args environs.PrecheckInstanceParams) error {
    17  	volumeAttachmentsZone, err := volumeAttachmentsZone(args.VolumeAttachments)
    18  	if err != nil {
    19  		return errors.Trace(err)
    20  	}
    21  	if _, err := env.instancePlacementZone(ctx, args.Placement, volumeAttachmentsZone); err != nil {
    22  		return errors.Trace(err)
    23  	}
    24  
    25  	if args.Constraints.HasInstanceType() {
    26  		if !env.checkInstanceType(ctx, args.Constraints) {
    27  			return errors.Errorf("invalid GCE instance type %q", *args.Constraints.InstanceType)
    28  		}
    29  	}
    30  
    31  	return nil
    32  }
    33  
    34  var unsupportedConstraints = []string{
    35  	constraints.Tags,
    36  	constraints.VirtType,
    37  	constraints.ImageID,
    38  }
    39  
    40  // instanceTypeConstraints defines the fields defined on each of the
    41  // instance types. See instancetypes.go.
    42  var instanceTypeConstraints = []string{
    43  	// TODO: move to a dynamic conflict for arch when gce supports more than amd64
    44  	//constraints.Arch, // Arches
    45  	constraints.Cores,
    46  	constraints.CpuPower,
    47  	constraints.Mem,
    48  	constraints.Container, // VirtType
    49  }
    50  
    51  // ConstraintsValidator returns a Validator value which is used to
    52  // validate and merge constraints.
    53  func (env *environ) ConstraintsValidator(ctx context.ProviderCallContext) (constraints.Validator, error) {
    54  	validator := constraints.NewValidator()
    55  
    56  	validator.RegisterConflicts(
    57  		[]string{constraints.InstanceType},
    58  		instanceTypeConstraints,
    59  	)
    60  
    61  	validator.RegisterUnsupported(unsupportedConstraints)
    62  
    63  	// vocab
    64  
    65  	instTypesAndCosts, err := env.InstanceTypes(ctx, constraints.Value{})
    66  	if err != nil {
    67  		return nil, errors.Trace(err)
    68  	}
    69  	instTypeNames := make([]string, len(instTypesAndCosts.InstanceTypes))
    70  	for i, itype := range instTypesAndCosts.InstanceTypes {
    71  		instTypeNames[i] = itype.Name
    72  	}
    73  	validator.RegisterVocabulary(constraints.InstanceType, instTypeNames)
    74  	validator.RegisterVocabulary(constraints.Container, []string{virtType})
    75  
    76  	return validator, nil
    77  }
    78  
    79  // SupportNetworks returns whether the environment has support to
    80  // specify networks for applications and machines.
    81  func (env *environ) SupportNetworks(ctx context.ProviderCallContext) bool {
    82  	return false
    83  }