nomad: first pass at register struct

nomad/structs/structs.go

@@ -37,6 +37,13 @@ type RPCInfo interface {
 
 // QueryOptions is used to specify various flags for read queries
 type QueryOptions struct {
+	// If set, wait until query exceeds given index. Must be provided
+	// with MaxQueryTime.
+	MinQueryIndex uint64
+
+	// Provided with MinQueryIndex to wait for change.
+	MaxQueryTime time.Duration
+
 	// The target region for this query
 	Region string
 
@@ -91,6 +98,78 @@ type QueryMeta struct {
 	KnownLeader bool
 }
 
+const (
+	// CoreCapability is used to convey the client core
+	// version. This is a special reserved capability.
+	CoreCapability = "core"
+)
+
+const (
+	StatusInit  = "initializing"
+	StatusReady = "ready"
+	StatusMaint = "maintenance"
+	StatusDown  = "down"
+)
+
+// RegisterRequest is used for Client.Register endpoint
+// to register a node as being a schedulable entity.
+type RegisterRequest struct {
+	// Datacenter for this node
+	Datacenter string
+
+	// Status of this node
+	Status string
+
+	// Scheduling capabilities are used by drivers.
+	// e.g. core = 2, docker = 1, java = 2, etc
+	Capabilities map[string]int
+
+	// Attributes is an arbitrary set of key/value
+	// data that can be used for constraints. Examples
+	// include "os=linux", "arch=386", "docker.runtime=1.8.3"
+	Attributes map[string]interface{}
+
+	// Resources is the available resources on the client.
+	// For example 'cpu=2' 'memory=2048'
+	Resouces *Resources
+
+	// Links are used to 'link' this client to external
+	// systems. For example 'consul=foo.dc1' 'aws=i-83212'
+	// 'ami=ami-123'
+	Links map[string]interface{}
+
+	// Meta is used to associate arbitrary metadata with this
+	// client. This is opaque to Nomad.
+	Meta map[string]string
+
+	WriteRequest
+}
+
+// Resources is used to define the resources available
+// on a client
+type Resources struct {
+	CPU              float64
+	CPUReserved      float64
+	MemoryMB         int
+	MemoryMBReserved int
+	DiskMB           int
+	DiskMBReservered int
+	IOPS             int
+	IOPSReserved     int
+	Networks         []*NetworkResource
+	Other            map[string]interface{}
+}
+
+// NetworkResource is used to represesent available network
+// resources>
+type NetworkResource struct {
+	Public        bool   // Is this a public address?
+	CIDR          string // CIDR block of addresses
+	ReservedPorts []int  // Reserved ports
+	MBits         int    // Throughput
+	MBitsReserved int
+}
+
 // msgpackHandle is a shared handle for encoding/decoding of structs
 var msgpackHandle = &codec.MsgpackHandle{}