Merge pull request #1039 from vaikas-google/master

First cut of adding dynamic cluster support to status command

_proto/hapi/release/status.proto

@@ -38,4 +38,6 @@ message Status {
         Code code = 1;
 
         google.protobuf.Any details = 2;
+        // Cluster resources as kubectl would print them.
+        string resources = 3;
 }

cmd/helm/status.go

@@ -68,6 +68,7 @@ func (s *statusCmd) run() error {
 
 	fmt.Fprintf(s.out, "Last Deployed: %s\n", timeconv.String(res.Info.LastDeployed))
 	fmt.Fprintf(s.out, "Status: %s\n", res.Info.Status.Code)
+	fmt.Fprintf(s.out, "Resources:\n%s\n", res.Info.Status.Resources)
 	if res.Info.Status.Details != nil {
 		fmt.Fprintf(s.out, "Details: %s\n", res.Info.Status.Details)
 	}

cmd/tiller/environment/environment.go

@@ -103,6 +103,15 @@ type KubeClient interface {
 	// by "\n---\n").
 	Create(namespace string, reader io.Reader) error
 
+	// Get gets one or more resources. Returned string hsa the format like kubectl
+	// provides with the column headers separating the resource types.
+	//
+	// namespace must contain a valid existing namespace.
+	//
+	// reader must contain a YAML stream (one or more YAML documents separated
+	// by "\n---\n").
+	Get(namespace string, reader io.Reader) (string, error)
+
 	// Delete destroys one or more resources.
 	//
 	// namespace must contain a valid existing namespace.
@@ -140,6 +149,12 @@ func (p *PrintingKubeClient) Create(ns string, r io.Reader) error {
 	return err
 }
 
+// Get prints the values of what would be created with a real KubeClient.
+func (p *PrintingKubeClient) Get(ns string, r io.Reader) (string, error) {
+	_, err := io.Copy(p.Out, r)
+	return "", err
+}
+
 // Delete implements KubeClient delete.
 //
 // It only prints out the content to be deleted.

cmd/tiller/environment/environment_test.go

@@ -84,6 +84,9 @@ type mockKubeClient struct {
 func (k *mockKubeClient) Create(ns string, r io.Reader) error {
 	return nil
 }
+func (k *mockKubeClient) Get(ns string, r io.Reader) (string, error) {
+	return "", nil
+}
 func (k *mockKubeClient) Delete(ns string, r io.Reader) error {
 	return nil
 }

cmd/tiller/release_server.go

@@ -158,6 +158,17 @@ func (s *releaseServer) GetReleaseStatus(c ctx.Context, req *services.GetRelease
 	if rel.Info == nil {
 		return nil, errors.New("release info is missing")
 	}
+
+	// Ok, we got the status of the release as we had jotted down, now we need to match the
+	// manifest we stashed away with reality from the cluster.
+	kubeCli := s.env.KubeClient
+	resp, err := kubeCli.Get(rel.Namespace, bytes.NewBufferString(rel.Manifest))
+	if err != nil {
+		log.Printf("warning: Get for %s failed: %v", rel.Name, err)
+		return nil, err
+	}
+	rel.Info.Status.Resources = resp
+
 	return &services.GetReleaseStatusResponse{Info: rel.Info}, nil
 }
 

pkg/kube/client.go

@@ -17,6 +17,7 @@ limitations under the License.
 package kube // import "k8s.io/helm/pkg/kube"
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"log"
@@ -50,7 +51,7 @@ func New(config clientcmd.ClientConfig) *Client {
 	}
 }
 
-// ResourceActorFunc performs an action on a signle resource.
+// ResourceActorFunc performs an action on a single resource.
 type ResourceActorFunc func(*resource.Info) error
 
 // Create creates kubernetes resources from an io.reader
@@ -63,6 +64,59 @@ func (c *Client) Create(namespace string, reader io.Reader) error {
 	return perform(c, namespace, reader, createResource)
 }
 
+// Get gets kubernetes resources as pretty printed string
+//
+// Namespace will set the namespace
+func (c *Client) Get(namespace string, reader io.Reader) (string, error) {
+	// Since we don't know what order the objects come in, let's group them by the types, so
+	// that when we print them, they come looking good (headers apply to subgroups, etc.)
+	objs := make(map[string][]runtime.Object)
+	err := perform(c, namespace, reader, func(info *resource.Info) error {
+		log.Printf("Doing get for: '%s'", info.Name)
+		obj, err := resource.NewHelper(info.Client, info.Mapping).Get(info.Namespace, info.Name, info.Export)
+		if err != nil {
+			return err
+		}
+		// We need to grab the ObjectReference so we can correctly group the objects.
+		or, err := api.GetReference(obj)
+		if err != nil {
+			log.Printf("FAILED GetReference for: %#v\n%v", obj, err)
+			return err
+		}
+
+		// Use APIVersion/Kind as grouping mechanism. I'm not sure if you can have multiple
+		// versions per cluster, but this certainly won't hurt anything, so let's be safe.
+		objType := or.APIVersion + "/" + or.Kind
+		objs[objType] = append(objs[objType], obj)
+		return nil
+	})
+
+	// Ok, now we have all the objects grouped by types (say, by v1/Pod, v1/Service, etc.), so
+	// spin through them and print them. Printer is cool since it prints the header only when
+	// an object type changes, so we can just rely on that. Problem is it doesn't seem to keep
+	// track of tab widths
+	buf := new(bytes.Buffer)
+	p := kubectl.NewHumanReadablePrinter(false, false, false, false, false, false, []string{})
+	for t, ot := range objs {
+		_, err = buf.WriteString("==> " + t + "\n")
+		if err != nil {
+			return "", err
+		}
+		for _, o := range ot {
+			err = p.PrintObj(o, buf)
+			if err != nil {
+				log.Printf("failed to print object type '%s', object: '%s' :\n %v", t, o, err)
+				return "", err
+			}
+		}
+		_, err := buf.WriteString("\n")
+		if err != nil {
+			return "", err
+		}
+	}
+	return buf.String(), err
+}
+
 // Update reads in the current configuration and a modified configuration from io.reader
 //  and creates resources that don't already exists, updates resources that have been modified
 //  and deletes resources from the current configuration that are not present in the

pkg/proto/hapi/release/status.pb.go

@@ -53,6 +53,8 @@ func (Status_Code) EnumDescriptor() ([]byte, []int) { return fileDescriptor3, []
 type Status struct {
 	Code    Status_Code           `protobuf:"varint,1,opt,name=code,enum=hapi.release.Status_Code" json:"code,omitempty"`
 	Details *google_protobuf1.Any `protobuf:"bytes,2,opt,name=details" json:"details,omitempty"`
+	// Cluster resources as kubectl would print them.
+	Resources string `protobuf:"bytes,3,opt,name=resources" json:"resources,omitempty"`
 }
 
 func (m *Status) Reset()                    { *m = Status{} }
@@ -73,20 +75,21 @@ func init() {
 }
 
 var fileDescriptor3 = []byte{
-	// 226 bytes of a gzipped FileDescriptorProto
+	// 247 bytes of a gzipped FileDescriptorProto
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-	0x5c, 0x6c, 0x6e, 0x8e, 0x9e, 0x3e, 0x40, 0x36, 0x8b, 0x13, 0x67, 0x14, 0x3b, 0xd4, 0x61, 0x49,
-	0x6c, 0x60, 0xdb, 0x8c, 0x01, 0x01, 0x00, 0x00, 0xff, 0xff, 0x8c, 0x99, 0x9a, 0x3b, 0x0d, 0x01,
-	0x00, 0x00,
+	0xaf, 0x32, 0x08, 0xa6, 0x48, 0x48, 0x86, 0x8b, 0xb3, 0x28, 0xb5, 0x38, 0xbf, 0xb4, 0x28, 0x39,
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+	0xc3, 0xbf, 0x50, 0x2b, 0x01, 0x00, 0x00,
 }