machine.go

/*
   Copyright 2014 CoreOS, Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package machine

import (
	"github.com/coreos/fleet/log"
	"github.com/coreos/fleet/pkg"
)

type Machine interface {
	State() MachineState
}

// HasMetadata determine if the Metadata of a given MachineState
// matches the indicated values.
func HasMetadata(state *MachineState, metadata map[string]pkg.Set) bool {
	for key, values := range metadata {
		local, ok := state.Metadata[key]
		if !ok {
			log.V(1).Infof("No local values found for Metadata(%s)", key)
			return false
		}

		log.V(1).Infof("Asserting local Metadata(%s) meets requirements", key)

		if values.Contains(local) {
			log.V(1).Infof("Local Metadata(%s) meets requirement", key)
		} else {
			log.V(1).Infof("Local Metadata(%s) does not match requirement", key)
			return false
		}
	}

	return true
}