feat(*): stub out install

cmd/helm.go

@@ -21,7 +21,10 @@ func main() {
 func commands() []cli.Command {
 	return []cli.Command{
 		{
-			Name: "install",
+			Name:        "install",
+			Usage:       "Initialize the client and install DM on Kubernetes.",
+			Description: ``,
+			Action:      func(c *cli.Context) { install() },
 		},
 		{
 			Name: "target",

cmd/install.go

+package main
+
+import (
+	"github.com/deis/helm-dm/dm"
+	"github.com/deis/helm-dm/format"
+	"github.com/deis/helm-dm/kubectl"
+)
+
+func install() error {
+	runner := &kubectl.PrintRunner{}
+	out, err := dm.Install(runner)
+	if err != nil {
+		format.Error("Error installing: %s %s", out, err)
+	}
+	format.Msg(out)
+	return nil
+}

dm/install.go

+package dm
+
+import (
+	"github.com/deis/helm-dm/kubectl"
+)
+
+// Install uses kubectl to install the base DM.
+//
+// Returns the string output received from the operation, and an error if the
+// command failed.
+func Install(runner kubectl.Runner) (string, error) {
+	o, err := runner.Create([]byte(InstallYAML), "dm")
+	return string(o), err
+}
+
+// InstallYAML is the installation YAML for DM.
+const InstallYAML = `
+######################################################################
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+# 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.
+######################################################################
+
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    app: dm
+    name: dm-namespace
+  name: dm
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: dm
+    name: expandybird-service
+  name: expandybird-service
+  namespace: dm
+spec:
+  ports:
+  - name: expandybird
+    port: 8081
+    targetPort: 8080
+  selector:
+    app: dm
+    name: expandybird
+---
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  labels:
+    app: dm
+    name: expandybird-rc
+  name: expandybird-rc
+  namespace: dm
+spec:
+  replicas: 2
+  selector:
+    app: dm
+    name: expandybird
+  template:
+    metadata:
+      labels:
+        app: dm
+        name: expandybird
+    spec:
+      containers:
+      - env: []
+        image: gcr.io/dm-k8s-testing/expandybird:latest
+        name: expandybird
+        ports:
+        - containerPort: 8080
+          name: expandybird
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: dm
+    name: resourcifier-service
+  name: resourcifier-service
+  namespace: dm
+spec:
+  ports:
+  - name: resourcifier
+    port: 8082
+    targetPort: 8080
+  selector:
+    app: dm
+    name: resourcifier
+---
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  labels:
+    app: dm
+    name: resourcifier-rc
+  name: resourcifier-rc
+  namespace: dm
+spec:
+  replicas: 2
+  selector:
+    app: dm
+    name: resourcifier
+  template:
+    metadata:
+      labels:
+        app: dm
+        name: resourcifier
+    spec:
+      containers:
+      - env: []
+        image: gcr.io/dm-k8s-testing/resourcifier:latest
+        name: resourcifier
+        ports:
+        - containerPort: 8080
+          name: resourcifier
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: dm
+    name: manager-service
+  name: manager-service
+  namespace: dm
+spec:
+  ports:
+  - name: manager
+    port: 8080
+    targetPort: 8080
+  selector:
+    app: dm
+    name: manager
+---
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  labels:
+    app: dm
+    name: manager-rc
+  name: manager-rc
+  namespace: dm
+spec:
+  replicas: 1
+  selector:
+    app: dm
+    name: manager
+  template:
+    metadata:
+      labels:
+        app: dm
+        name: manager
+    spec:
+      containers:
+      - env: []
+        image: gcr.io/dm-k8s-testing/manager:latest
+        name: manager
+        ports:
+        - containerPort: 8080
+          name: manager
+`

format/messages.go

+package format
+
+import (
+	"fmt"
+	"os"
+)
+
+// This is all just placeholder.
+
+func Error(msg string, v ...interface{}) {
+	msg = "[ERROR]" + msg + "\n"
+	fmt.Fprintf(os.Stderr, msg, v...)
+}
+
+func Info(msg string, v ...interface{}) {
+	msg = "[INFO]" + msg + "\n"
+	fmt.Fprintf(os.Stdout, msg, v...)
+}
+
+func Msg(msg string, v ...interface{}) {
+	fmt.Fprintf(os.Stdout, msg, v...)
+}

glide.yaml

-package: github.com/engineyard/helm-dm
+package: github.com/deis/helm-dm
 import:
 - package: github.com/codegangsta/cli
 - package: github.com/kubernetes/deployment-manager

kubectl/cluster_info.go

+package kubectl
+
+// ClusterInfo returns Kubernetes cluster info
+func (r RealRunner) ClusterInfo() ([]byte, error) {
+	return command("cluster-info").CombinedOutput()
+}
+
+// ClusterInfo returns the commands to kubectl
+func (r PrintRunner) ClusterInfo() ([]byte, error) {
+	cmd := command("cluster-info")
+	return []byte(cmd.String()), nil
+}

kubectl/command.go

+package kubectl
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+	"strings"
+)
+
+type cmd struct {
+	*exec.Cmd
+}
+
+func command(args ...string) *cmd {
+	return &cmd{exec.Command(Path, args...)}
+}
+
+func assignStdin(cmd *cmd, in []byte) {
+	cmd.Stdin = bytes.NewBuffer(in)
+}
+
+func (c *cmd) String() string {
+	var stdin string
+
+	if c.Stdin != nil {
+		b, _ := ioutil.ReadAll(c.Stdin)
+		stdin = fmt.Sprintf("< %s", string(b))
+	}
+
+	return fmt.Sprintf("[CMD] %s %s", strings.Join(c.Args, " "), stdin)
+}

kubectl/create.go

+package kubectl
+
+// Create uploads a chart to Kubernetes
+func (r RealRunner) Create(stdin []byte, ns string) ([]byte, error) {
+	args := []string{"create", "-f", "-"}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+
+	cmd := command(args...)
+	assignStdin(cmd, stdin)
+
+	return cmd.CombinedOutput()
+}
+
+// Create returns the commands to kubectl
+func (r PrintRunner) Create(stdin []byte, ns string) ([]byte, error) {
+	args := []string{"create", "-f", "-"}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+
+	cmd := command(args...)
+	assignStdin(cmd, stdin)
+
+	return []byte(cmd.String()), nil
+}

kubectl/create_test.go

+package kubectl
+
+import (
+	"testing"
+)
+
+func TestPrintCreate(t *testing.T) {
+	var client Runner = PrintRunner{}
+
+	expected := `[CMD] kubectl --namespace=default-namespace create -f - < some stdin data`
+
+	out, err := client.Create([]byte("some stdin data"), "default-namespace")
+	if err != nil {
+		t.Error(err)
+	}
+
+	actual := string(out)
+
+	if expected != actual {
+		t.Fatalf("actual %s != expected %s", actual, expected)
+	}
+}

kubectl/delete.go

+package kubectl
+
+// Delete removes a chart from Kubernetes.
+func (r RealRunner) Delete(name, ktype, ns string) ([]byte, error) {
+
+	args := []string{"delete", ktype, name}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+	return command(args...).CombinedOutput()
+}
+
+// Delete returns the commands to kubectl
+func (r PrintRunner) Delete(name, ktype, ns string) ([]byte, error) {
+
+	args := []string{"delete", ktype, name}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+
+	cmd := command(args...)
+	return []byte(cmd.String()), nil
+}

kubectl/get.go

+package kubectl
+
+// Get returns Kubernetes resources
+func (r RealRunner) Get(stdin []byte, ns string) ([]byte, error) {
+	args := []string{"get", "-f", "-"}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+	cmd := command(args...)
+	assignStdin(cmd, stdin)
+
+	return cmd.CombinedOutput()
+}
+
+// Get returns the commands to kubectl
+func (r PrintRunner) Get(stdin []byte, ns string) ([]byte, error) {
+	args := []string{"get", "-f", "-"}
+
+	if ns != "" {
+		args = append([]string{"--namespace=" + ns}, args...)
+	}
+	cmd := command(args...)
+	assignStdin(cmd, stdin)
+
+	return []byte(cmd.String()), nil
+}

kubectl/get_test.go

+package kubectl
+
+import (
+	"testing"
+)
+
+func TestGet(t *testing.T) {
+	Client = TestRunner{
+		out: []byte("running the get command"),
+	}
+
+	expects := "running the get command"
+	out, _ := Client.Get([]byte{}, "")
+	if string(out) != expects {
+		t.Errorf("%s != %s", string(out), expects)
+	}
+}

kubectl/kubectl.go

+package kubectl
+
+// Path is the path of the kubectl binary
+var Path = "kubectl"
+
+// Runner is an interface to wrap kubectl convenience methods
+type Runner interface {
+	// ClusterInfo returns Kubernetes cluster info
+	ClusterInfo() ([]byte, error)
+	// Create uploads a chart to Kubernetes
+	Create([]byte, string) ([]byte, error)
+	// Delete removes a chart from Kubernetes.
+	Delete(string, string, string) ([]byte, error)
+	// Get returns Kubernetes resources
+	Get([]byte, string) ([]byte, error)
+}
+
+// RealRunner implements Runner to execute kubectl commands
+type RealRunner struct{}
+
+// PrintRunner implements Runner to return a []byte of the command to be executed
+type PrintRunner struct{}
+
+// Client stores the instance of Runner
+var Client Runner = RealRunner{}

kubectl/kubectl_test.go

+package kubectl
+
+type TestRunner struct {
+	Runner
+
+	out []byte
+	err error
+}
+
+func (r TestRunner) Get(stdin []byte, ns string) ([]byte, error) {
+	return r.out, r.err
+}