http/node: adding a few node endpoints

command/agent/node_endpoint.go

@@ -0,0 +1,107 @@
+package agent
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/hashicorp/nomad/nomad/structs"
+)
+
+func (s *HTTPServer) NodesRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
+	if req.Method != "GET" {
+		return nil, CodedError(405, ErrInvalidMethod)
+	}
+
+	// TODO NODE LIST
+	return nil, nil
+}
+
+func (s *HTTPServer) NodeSpecificRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
+	path := strings.TrimPrefix(req.URL.Path, "/v1/node/")
+	switch {
+	case strings.HasSuffix(path, "/evaluate"):
+		nodeName := strings.TrimSuffix(path, "/evaluate")
+		return s.nodeForceEvaluate(resp, req, nodeName)
+	case strings.HasSuffix(path, "/allocations"):
+		nodeName := strings.TrimSuffix(path, "/allocations")
+		return s.nodeAllocations(resp, req, nodeName)
+	case strings.HasSuffix(path, "/drain"):
+		nodeName := strings.TrimSuffix(path, "/drain")
+		return s.nodeToggleDrain(resp, req, nodeName)
+	default:
+		return s.nodeQuery(resp, req, path)
+	}
+}
+
+func (s *HTTPServer) nodeForceEvaluate(resp http.ResponseWriter, req *http.Request,
+	nodeID string) (interface{}, error) {
+	if req.Method != "PUT" && req.Method != "POST" {
+		return nil, CodedError(405, ErrInvalidMethod)
+	}
+	args := structs.NodeEvaluateRequest{
+		NodeID: nodeID,
+	}
+	s.parseRegion(req, &args.Region)
+
+	var out structs.NodeUpdateResponse
+	if err := s.agent.RPC("Client.Evaluate", &args, &out); err != nil {
+		return nil, err
+	}
+	setIndex(resp, out.Index)
+	return out, nil
+}
+
+func (s *HTTPServer) nodeAllocations(resp http.ResponseWriter, req *http.Request,
+	nodeID string) (interface{}, error) {
+	if req.Method != "GET" {
+		return nil, CodedError(405, ErrInvalidMethod)
+	}
+	args := structs.NodeSpecificRequest{
+		NodeID: nodeID,
+	}
+	if s.parse(resp, req, &args.Region, &args.QueryOptions) {
+		return nil, nil
+	}
+
+	var out structs.NodeAllocsResponse
+	if err := s.agent.RPC("Client.GetAllocs", &args, &out); err != nil {
+		return nil, err
+	}
+
+	setMeta(resp, &out.QueryMeta)
+	return out.Allocs, nil
+}
+
+func (s *HTTPServer) nodeToggleDrain(resp http.ResponseWriter, req *http.Request,
+	jobName string) (interface{}, error) {
+	if req.Method != "PUT" && req.Method != "POST" {
+		return nil, CodedError(405, ErrInvalidMethod)
+	}
+
+	// TODO
+	return nil, nil
+}
+
+func (s *HTTPServer) nodeQuery(resp http.ResponseWriter, req *http.Request,
+	nodeID string) (interface{}, error) {
+	if req.Method != "GET" {
+		return nil, CodedError(405, ErrInvalidMethod)
+	}
+	args := structs.NodeSpecificRequest{
+		NodeID: nodeID,
+	}
+	if s.parse(resp, req, &args.Region, &args.QueryOptions) {
+		return nil, nil
+	}
+
+	var out structs.SingleNodeResponse
+	if err := s.agent.RPC("Client.GetNode", &args, &out); err != nil {
+		return nil, err
+	}
+
+	setMeta(resp, &out.QueryMeta)
+	if out.Node == nil {
+		return nil, CodedError(404, "node not found")
+	}
+	return out.Node, nil
+}