GlusterFS dynamic provisioner and deleter interface based on StorageClass claims

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/github.com/heketi/heketi/LICENSE

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   1. Definitions.
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+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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vendor/github.com/heketi/heketi/client/api/go-client/backup.go

@@ -0,0 +1,53 @@
+//
+// Copyright (c) 2016 The heketi Authors
+//
+// 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 client
+
+import (
+	"io"
+	"net/http"
+
+	"github.com/heketi/heketi/pkg/utils"
+)
+
+func (c *Client) BackupDb(w io.Writer) error {
+	// Create a request
+	req, err := http.NewRequest("GET", c.host+"/backup/db", nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusOK {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	// Read data from response
+	defer r.Body.Close()
+	_, err = io.Copy(w, r.Body)
+
+	return err
+}

vendor/github.com/heketi/heketi/client/api/go-client/client.go

@@ -0,0 +1,180 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"net/http"
+	"time"
+
+	jwt "github.com/dgrijalva/jwt-go"
+	"github.com/heketi/heketi/pkg/utils"
+)
+
+const (
+	MAX_CONCURRENT_REQUESTS = 32
+)
+
+// Client object
+type Client struct {
+	host     string
+	key      string
+	user     string
+	throttle chan bool
+}
+
+// Creates a new client to access a Heketi server
+func NewClient(host, user, key string) *Client {
+	c := &Client{}
+
+	c.key = key
+	c.host = host
+	c.user = user
+
+	// Maximum concurrent requests
+	c.throttle = make(chan bool, MAX_CONCURRENT_REQUESTS)
+
+	return c
+}
+
+// Create a client to access a Heketi server without authentication enabled
+func NewClientNoAuth(host string) *Client {
+	return NewClient(host, "", "")
+}
+
+// Simple Hello test to check if the server is up
+func (c *Client) Hello() error {
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/hello", nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusOK {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}
+
+// Make sure we do not run out of fds by throttling the requests
+func (c *Client) do(req *http.Request) (*http.Response, error) {
+	c.throttle <- true
+	defer func() {
+		<-c.throttle
+	}()
+
+	httpClient := &http.Client{}
+	httpClient.CheckRedirect = c.checkRedirect
+	return httpClient.Do(req)
+}
+
+// This function is called by the http package if it detects that it needs to
+// be redirected.  This happens when the server returns a 303 HTTP Status.
+// Here we create a new token before it makes the next request.
+func (c *Client) checkRedirect(req *http.Request, via []*http.Request) error {
+	return c.setToken(req)
+}
+
+// Wait for the job to finish, waiting waitTime on every loop
+func (c *Client) waitForResponseWithTimer(r *http.Response,
+	waitTime time.Duration) (*http.Response, error) {
+
+	// Get temp resource
+	location, err := r.Location()
+	if err != nil {
+		return nil, err
+	}
+
+	for {
+		// Create request
+		req, err := http.NewRequest("GET", location.String(), nil)
+		if err != nil {
+			return nil, err
+		}
+
+		// Set token
+		err = c.setToken(req)
+		if err != nil {
+			return nil, err
+		}
+
+		// Wait for response
+		r, err = c.do(req)
+		if err != nil {
+			return nil, err
+		}
+
+		// Check if the request is pending
+		if r.Header.Get("X-Pending") == "true" {
+			if r.StatusCode != http.StatusOK {
+				return nil, utils.GetErrorFromResponse(r)
+			}
+			time.Sleep(waitTime)
+		} else {
+			return r, nil
+		}
+	}
+
+}
+
+// Create JSON Web Token
+func (c *Client) setToken(r *http.Request) error {
+
+	// Create qsh hash
+	qshstring := r.Method + "&" + r.URL.Path
+	hash := sha256.New()
+	hash.Write([]byte(qshstring))
+
+	// Create Token
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+		// Set issuer
+		"iss": c.user,
+
+		// Set issued at time
+		"iat": time.Now().Unix(),
+
+		// Set expiration
+		"exp": time.Now().Add(time.Minute * 5).Unix(),
+
+		// Set qsh
+		"qsh": hex.EncodeToString(hash.Sum(nil)),
+	})
+
+	// Sign the token
+	signedtoken, err := token.SignedString([]byte(c.key))
+	if err != nil {
+		return err
+	}
+
+	// Save it in the header
+	r.Header.Set("Authorization", "bearer "+signedtoken)
+
+	return nil
+}

vendor/github.com/heketi/heketi/client/api/go-client/cluster.go

@@ -0,0 +1,152 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"bytes"
+	"github.com/heketi/heketi/pkg/glusterfs/api"
+	"github.com/heketi/heketi/pkg/utils"
+	"net/http"
+)
+
+func (c *Client) ClusterCreate() (*api.ClusterInfoResponse, error) {
+
+	// Create a request
+	req, err := http.NewRequest("POST", c.host+"/clusters", bytes.NewBuffer([]byte(`{}`)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusCreated {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var cluster api.ClusterInfoResponse
+	err = utils.GetJsonFromResponse(r, &cluster)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &cluster, nil
+}
+
+func (c *Client) ClusterInfo(id string) (*api.ClusterInfoResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/clusters/"+id, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var cluster api.ClusterInfoResponse
+	err = utils.GetJsonFromResponse(r, &cluster)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &cluster, nil
+}
+
+func (c *Client) ClusterList() (*api.ClusterListResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/clusters", nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var clusters api.ClusterListResponse
+	err = utils.GetJsonFromResponse(r, &clusters)
+	if err != nil {
+		return nil, err
+	}
+
+	return &clusters, nil
+}
+
+func (c *Client) ClusterDelete(id string) error {
+
+	// Create DELETE request
+	req, err := http.NewRequest("DELETE", c.host+"/clusters/"+id, nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusOK {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}

vendor/github.com/heketi/heketi/client/api/go-client/device.go

@@ -0,0 +1,171 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/heketi/heketi/pkg/glusterfs/api"
+	"github.com/heketi/heketi/pkg/utils"
+	"net/http"
+	"time"
+)
+
+func (c *Client) DeviceAdd(request *api.DeviceAddRequest) error {
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST", c.host+"/devices", bytes.NewBuffer(buffer))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Second)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusNoContent {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}
+
+func (c *Client) DeviceInfo(id string) (*api.DeviceInfoResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/devices/"+id, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var device api.DeviceInfoResponse
+	err = utils.GetJsonFromResponse(r, &device)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &device, nil
+}
+
+func (c *Client) DeviceDelete(id string) error {
+
+	// Create a request
+	req, err := http.NewRequest("DELETE", c.host+"/devices/"+id, nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Second)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusNoContent {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}
+
+func (c *Client) DeviceState(id string,
+	request *api.StateRequest) error {
+
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST",
+		c.host+"/devices/"+id+"/state",
+		bytes.NewBuffer(buffer))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusOK {
+		return utils.GetErrorFromResponse(r)
+	}
+	return nil
+}

vendor/github.com/heketi/heketi/client/api/go-client/node.go

@@ -0,0 +1,178 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/heketi/heketi/pkg/glusterfs/api"
+	"github.com/heketi/heketi/pkg/utils"
+	"net/http"
+	"time"
+)
+
+func (c *Client) NodeAdd(request *api.NodeAddRequest) (*api.NodeInfoResponse, error) {
+
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return nil, err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST", c.host+"/nodes", bytes.NewBuffer(buffer))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Millisecond*250)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var node api.NodeInfoResponse
+	err = utils.GetJsonFromResponse(r, &node)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &node, nil
+}
+
+func (c *Client) NodeInfo(id string) (*api.NodeInfoResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/nodes/"+id, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var node api.NodeInfoResponse
+	err = utils.GetJsonFromResponse(r, &node)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &node, nil
+}
+
+func (c *Client) NodeDelete(id string) error {
+
+	// Create a request
+	req, err := http.NewRequest("DELETE", c.host+"/nodes/"+id, nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Millisecond*250)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusNoContent {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}
+
+func (c *Client) NodeState(id string, request *api.StateRequest) error {
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST",
+		c.host+"/nodes/"+id+"/state",
+		bytes.NewBuffer(buffer))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusOK {
+		return utils.GetErrorFromResponse(r)
+	}
+	return nil
+}

vendor/github.com/heketi/heketi/client/api/go-client/topology.go

@@ -0,0 +1,66 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"github.com/heketi/heketi/pkg/glusterfs/api"
+)
+
+func (c *Client) TopologyInfo() (*api.TopologyInfoResponse, error) {
+	topo := &api.TopologyInfoResponse{
+		ClusterList: make([]api.Cluster, 0),
+	}
+	clusterlist, err := c.ClusterList()
+	if err != nil {
+		return nil, err
+	}
+	for _, cluster := range clusterlist.Clusters {
+		clusteri, err := c.ClusterInfo(cluster)
+		if err != nil {
+			return nil, err
+		}
+		cluster := api.Cluster{
+			Id:      clusteri.Id,
+			Volumes: make([]api.VolumeInfoResponse, 0),
+			Nodes:   make([]api.NodeInfoResponse, 0),
+		}
+		cluster.Id = clusteri.Id
+
+		// Iterate over the volume list in the cluster
+		for _, volumes := range clusteri.Volumes {
+			volumesi, err := c.VolumeInfo(volumes)
+			if err != nil {
+				return nil, err
+			}
+			if volumesi.Cluster == cluster.Id {
+				cluster.Volumes = append(cluster.Volumes, *volumesi)
+			}
+		}
+
+		// Iterate over the nodes in the cluster
+		for _, node := range clusteri.Nodes {
+			nodei, err := c.NodeInfo(string(node))
+			if err != nil {
+				return nil, err
+			}
+			cluster.Nodes = append(cluster.Nodes, *nodei)
+		}
+		topo.ClusterList = append(topo.ClusterList, cluster)
+	}
+	return topo, nil
+
+}

vendor/github.com/heketi/heketi/client/api/go-client/volume.go

@@ -0,0 +1,237 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 client
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"github.com/heketi/heketi/pkg/glusterfs/api"
+	"github.com/heketi/heketi/pkg/utils"
+)
+
+func (c *Client) VolumeCreate(request *api.VolumeCreateRequest) (
+	*api.VolumeInfoResponse, error) {
+
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return nil, err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST",
+		c.host+"/volumes",
+		bytes.NewBuffer(buffer))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Second)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var volume api.VolumeInfoResponse
+	err = utils.GetJsonFromResponse(r, &volume)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &volume, nil
+
+}
+
+func (c *Client) VolumeExpand(id string, request *api.VolumeExpandRequest) (
+	*api.VolumeInfoResponse, error) {
+
+	// Marshal request to JSON
+	buffer, err := json.Marshal(request)
+	if err != nil {
+		return nil, err
+	}
+
+	// Create a request
+	req, err := http.NewRequest("POST",
+		c.host+"/volumes/"+id+"/expand",
+		bytes.NewBuffer(buffer))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Second)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var volume api.VolumeInfoResponse
+	err = utils.GetJsonFromResponse(r, &volume)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &volume, nil
+
+}
+
+func (c *Client) VolumeList() (*api.VolumeListResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/volumes", nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var volumes api.VolumeListResponse
+	err = utils.GetJsonFromResponse(r, &volumes)
+	if err != nil {
+		return nil, err
+	}
+
+	return &volumes, nil
+}
+
+func (c *Client) VolumeInfo(id string) (*api.VolumeInfoResponse, error) {
+
+	// Create request
+	req, err := http.NewRequest("GET", c.host+"/volumes/"+id, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get info
+	r, err := c.do(req)
+	if err != nil {
+		return nil, err
+	}
+	if r.StatusCode != http.StatusOK {
+		return nil, utils.GetErrorFromResponse(r)
+	}
+
+	// Read JSON response
+	var volume api.VolumeInfoResponse
+	err = utils.GetJsonFromResponse(r, &volume)
+	r.Body.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	return &volume, nil
+}
+
+func (c *Client) VolumeDelete(id string) error {
+
+	// Create a request
+	req, err := http.NewRequest("DELETE", c.host+"/volumes/"+id, nil)
+	if err != nil {
+		return err
+	}
+
+	// Set token
+	err = c.setToken(req)
+	if err != nil {
+		return err
+	}
+
+	// Send request
+	r, err := c.do(req)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusAccepted {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	// Wait for response
+	r, err = c.waitForResponseWithTimer(r, time.Second)
+	if err != nil {
+		return err
+	}
+	if r.StatusCode != http.StatusNoContent {
+		return utils.GetErrorFromResponse(r)
+	}
+
+	return nil
+}

vendor/github.com/heketi/heketi/pkg/glusterfs/api/types.go

@@ -0,0 +1,251 @@
+//
+// Copyright (c) 2016 The heketi Authors
+//
+// 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.
+//
+
+//
+// Please see https://github.com/heketi/heketi/wiki/API
+// for documentation
+//
+package api
+
+import (
+	"fmt"
+	"sort"
+)
+
+// State
+type EntryState string
+
+const (
+	EntryStateUnknown EntryState = ""
+	EntryStateOnline  EntryState = "online"
+	EntryStateOffline EntryState = "offline"
+	EntryStateFailed  EntryState = "failed"
+)
+
+type DurabilityType string
+
+const (
+	DurabilityReplicate      DurabilityType = "replicate"
+	DurabilityDistributeOnly DurabilityType = "none"
+	DurabilityEC             DurabilityType = "disperse"
+)
+
+// Common
+type StateRequest struct {
+	State EntryState `json:"state"`
+}
+
+// Storage values in KB
+type StorageSize struct {
+	Total uint64 `json:"total"`
+	Free  uint64 `json:"free"`
+	Used  uint64 `json:"used"`
+}
+
+type HostAddresses struct {
+	Manage  sort.StringSlice `json:"manage"`
+	Storage sort.StringSlice `json:"storage"`
+}
+
+// Brick
+type BrickInfo struct {
+	Id       string `json:"id"`
+	Path     string `json:"path"`
+	DeviceId string `json:"device"`
+	NodeId   string `json:"node"`
+
+	// Size in KB
+	Size uint64 `json:"size"`
+}
+
+// Device
+type Device struct {
+	Name string `json:"name"`
+}
+
+type DeviceAddRequest struct {
+	Device
+	NodeId string `json:"node"`
+}
+
+type DeviceInfo struct {
+	Device
+	Storage StorageSize `json:"storage"`
+	Id      string      `json:"id"`
+}
+
+type DeviceInfoResponse struct {
+	DeviceInfo
+	State  EntryState  `json:"state"`
+	Bricks []BrickInfo `json:"bricks"`
+}
+
+// Node
+type NodeAddRequest struct {
+	Zone      int           `json:"zone"`
+	Hostnames HostAddresses `json:"hostnames"`
+	ClusterId string        `json:"cluster"`
+}
+
+type NodeInfo struct {
+	NodeAddRequest
+	Id string `json:"id"`
+}
+
+type NodeInfoResponse struct {
+	NodeInfo
+	State       EntryState           `json:"state"`
+	DevicesInfo []DeviceInfoResponse `json:"devices"`
+}
+
+// Cluster
+type Cluster struct {
+	Volumes []VolumeInfoResponse `json:"volumes"`
+	Nodes   []NodeInfoResponse   `json:"nodes"`
+	Id      string               `json:"id"`
+}
+
+type TopologyInfoResponse struct {
+	ClusterList []Cluster `json:"clusters"`
+}
+
+type ClusterInfoResponse struct {
+	Id      string           `json:"id"`
+	Nodes   sort.StringSlice `json:"nodes"`
+	Volumes sort.StringSlice `json:"volumes"`
+}
+
+type ClusterListResponse struct {
+	Clusters []string `json:"clusters"`
+}
+
+// Durabilities
+type ReplicaDurability struct {
+	Replica int `json:"replica,omitempty"`
+}
+
+type DisperseDurability struct {
+	Data       int `json:"data,omitempty"`
+	Redundancy int `json:"redundancy,omitempty"`
+}
+
+// Volume
+type VolumeDurabilityInfo struct {
+	Type      DurabilityType     `json:"type,omitempty"`
+	Replicate ReplicaDurability  `json:"replicate,omitempty"`
+	Disperse  DisperseDurability `json:"disperse,omitempty"`
+}
+
+type VolumeCreateRequest struct {
+	// Size in GB
+	Size       int                  `json:"size"`
+	Clusters   []string             `json:"clusters,omitempty"`
+	Name       string               `json:"name"`
+	Durability VolumeDurabilityInfo `json:"durability,omitempty"`
+	Snapshot   struct {
+		Enable bool    `json:"enable"`
+		Factor float32 `json:"factor"`
+	} `json:"snapshot"`
+}
+
+type VolumeInfo struct {
+	VolumeCreateRequest
+	Id      string `json:"id"`
+	Cluster string `json:"cluster"`
+	Mount   struct {
+		GlusterFS struct {
+			Hosts      []string          `json:"hosts"`
+			MountPoint string            `json:"device"`
+			Options    map[string]string `json:"options"`
+		} `json:"glusterfs"`
+	} `json:"mount"`
+}
+
+type VolumeInfoResponse struct {
+	VolumeInfo
+	Bricks []BrickInfo `json:"bricks"`
+}
+
+type VolumeListResponse struct {
+	Volumes []string `json:"volumes"`
+}
+
+type VolumeExpandRequest struct {
+	Size int `json:"expand_size"`
+}
+
+// Constructors
+
+func NewVolumeInfoResponse() *VolumeInfoResponse {
+
+	info := &VolumeInfoResponse{}
+	info.Mount.GlusterFS.Options = make(map[string]string)
+	info.Bricks = make([]BrickInfo, 0)
+
+	return info
+}
+
+// String functions
+func (v *VolumeInfoResponse) String() string {
+	s := fmt.Sprintf("Name: %v\n"+
+		"Size: %v\n"+
+		"Volume Id: %v\n"+
+		"Cluster Id: %v\n"+
+		"Mount: %v\n"+
+		"Mount Options: backup-volfile-servers=%v\n"+
+		"Durability Type: %v\n",
+		v.Name,
+		v.Size,
+		v.Id,
+		v.Cluster,
+		v.Mount.GlusterFS.MountPoint,
+		v.Mount.GlusterFS.Options["backup-volfile-servers"],
+		v.Durability.Type)
+
+	switch v.Durability.Type {
+	case DurabilityEC:
+		s += fmt.Sprintf("Disperse Data: %v\n"+
+			"Disperse Redundancy: %v\n",
+			v.Durability.Disperse.Data,
+			v.Durability.Disperse.Redundancy)
+	case DurabilityReplicate:
+		s += fmt.Sprintf("Distributed+Replica: %v\n",
+			v.Durability.Replicate.Replica)
+	}
+
+	if v.Snapshot.Enable {
+		s += fmt.Sprintf("Snapshot Factor: %.2f\n",
+			v.Snapshot.Factor)
+	}
+
+	/*
+		s += "\nBricks:\n"
+		for _, b := range v.Bricks {
+			s += fmt.Sprintf("Id: %v\n"+
+				"Path: %v\n"+
+				"Size (GiB): %v\n"+
+				"Node: %v\n"+
+				"Device: %v\n\n",
+				b.Id,
+				b.Path,
+				b.Size/(1024*1024),
+				b.NodeId,
+				b.DeviceId)
+		}
+	*/
+
+	return s
+}

vendor/github.com/heketi/heketi/pkg/utils/bodystring.go

@@ -0,0 +1,43 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+// Return the body from a response as a string
+func GetStringFromResponse(r *http.Response) (string, error) {
+	body, err := ioutil.ReadAll(io.LimitReader(r.Body, r.ContentLength))
+	if err != nil {
+		return "", err
+	}
+	r.Body.Close()
+	return string(body), nil
+}
+
+// Return the body from a response as an error
+func GetErrorFromResponse(r *http.Response) error {
+	s, err := GetStringFromResponse(r)
+	if err != nil {
+		return err
+	}
+	return errors.New(s)
+}

vendor/github.com/heketi/heketi/pkg/utils/jsonutils.go

@@ -0,0 +1,50 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+func jsonFromBody(r io.Reader, v interface{}) error {
+
+	// Check body
+	body, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+	if err := json.Unmarshal(body, v); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Unmarshal JSON from request
+func GetJsonFromRequest(r *http.Request, v interface{}) error {
+	defer r.Body.Close()
+	return jsonFromBody(r.Body, v)
+}
+
+// Unmarshal JSON from response
+func GetJsonFromResponse(r *http.Response, v interface{}) error {
+	defer r.Body.Close()
+	return jsonFromBody(r.Body, v)
+}

vendor/github.com/heketi/heketi/pkg/utils/log.go

@@ -0,0 +1,151 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"runtime"
+	"strings"
+
+	"github.com/lpabon/godbc"
+)
+
+type LogLevel int
+
+// Log levels
+const (
+	LEVEL_NOLOG LogLevel = iota
+	LEVEL_CRITICAL
+	LEVEL_ERROR
+	LEVEL_WARNING
+	LEVEL_INFO
+	LEVEL_DEBUG
+)
+
+var (
+	stderr io.Writer = os.Stderr
+	stdout io.Writer = os.Stdout
+)
+
+type Logger struct {
+	critlog, errorlog, infolog *log.Logger
+	debuglog, warninglog       *log.Logger
+
+	level LogLevel
+}
+
+func logWithLongFile(l *log.Logger, format string, v ...interface{}) {
+	_, file, line, _ := runtime.Caller(2)
+
+	// Shorten the path.
+	// From
+	// /builddir/build/BUILD/heketi-3f4a5b1b6edff87232e8b24533c53b4151ebd9c7/src/github.com/heketi/heketi/apps/glusterfs/volume_entry.go
+	// to
+	// src/github.com/heketi/heketi/apps/glusterfs/volume_entry.go
+	i := strings.Index(file, "/src/")
+	if i == -1 {
+		i = 0
+	}
+
+	l.Print(fmt.Sprintf("%v:%v: ", file[i:], line) +
+		fmt.Sprintf(format, v...))
+}
+
+// Create a new logger
+func NewLogger(prefix string, level LogLevel) *Logger {
+	godbc.Require(level >= 0, level)
+	godbc.Require(level <= LEVEL_DEBUG, level)
+
+	l := &Logger{}
+
+	if level == LEVEL_NOLOG {
+		l.level = LEVEL_DEBUG
+	} else {
+		l.level = level
+	}
+
+	l.critlog = log.New(stderr, prefix+" CRITICAL ", log.LstdFlags)
+	l.errorlog = log.New(stderr, prefix+" ERROR ", log.LstdFlags)
+	l.warninglog = log.New(stdout, prefix+" WARNING ", log.LstdFlags)
+	l.infolog = log.New(stdout, prefix+" INFO ", log.LstdFlags)
+	l.debuglog = log.New(stdout, prefix+" DEBUG ", log.LstdFlags)
+
+	godbc.Ensure(l.critlog != nil)
+	godbc.Ensure(l.errorlog != nil)
+	godbc.Ensure(l.warninglog != nil)
+	godbc.Ensure(l.infolog != nil)
+	godbc.Ensure(l.debuglog != nil)
+
+	return l
+}
+
+// Return current level
+func (l *Logger) Level() LogLevel {
+	return l.level
+}
+
+// Set level
+func (l *Logger) SetLevel(level LogLevel) {
+	l.level = level
+}
+
+// Log critical information
+func (l *Logger) Critical(format string, v ...interface{}) {
+	if l.level >= LEVEL_CRITICAL {
+		logWithLongFile(l.critlog, format, v...)
+	}
+}
+
+// Log error string
+func (l *Logger) LogError(format string, v ...interface{}) {
+	if l.level >= LEVEL_ERROR {
+		logWithLongFile(l.errorlog, format, v...)
+	}
+}
+
+// Log error variable
+func (l *Logger) Err(err error) error {
+	if l.level >= LEVEL_ERROR {
+		logWithLongFile(l.errorlog, "%v", err)
+	}
+
+	return err
+}
+
+// Log warning information
+func (l *Logger) Warning(format string, v ...interface{}) {
+	if l.level >= LEVEL_WARNING {
+		l.warninglog.Printf(format, v...)
+	}
+}
+
+// Log string
+func (l *Logger) Info(format string, v ...interface{}) {
+	if l.level >= LEVEL_INFO {
+		l.infolog.Printf(format, v...)
+	}
+}
+
+// Log string as debug
+func (l *Logger) Debug(format string, v ...interface{}) {
+	if l.level >= LEVEL_DEBUG {
+		logWithLongFile(l.debuglog, format, v...)
+	}
+}

vendor/github.com/heketi/heketi/pkg/utils/sortedstrings.go

@@ -0,0 +1,40 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"sort"
+)
+
+// Check if a sorted string list has a string
+func SortedStringHas(s sort.StringSlice, x string) bool {
+	index := s.Search(x)
+	if index == len(s) {
+		return false
+	}
+	return s[s.Search(x)] == x
+}
+
+// Delete a string from a sorted string list
+func SortedStringsDelete(s sort.StringSlice, x string) sort.StringSlice {
+	index := s.Search(x)
+	if len(s) != index && s[index] == x {
+		s = append(s[:index], s[index+1:]...)
+	}
+
+	return s
+}

vendor/github.com/heketi/heketi/pkg/utils/statusgroup.go

@@ -0,0 +1,75 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"sync"
+)
+
+type StatusGroup struct {
+	wg      sync.WaitGroup
+	results chan error
+	err     error
+}
+
+// Create a new goroutine error status collector
+func NewStatusGroup() *StatusGroup {
+	s := &StatusGroup{}
+	s.results = make(chan error, 1)
+
+	return s
+}
+
+// Adds to the number of goroutines it should wait
+func (s *StatusGroup) Add(delta int) {
+	s.wg.Add(delta)
+}
+
+// Removes the number of pending goroutines by one
+func (s *StatusGroup) Done() {
+	s.wg.Done()
+}
+
+// Goroutine can return an error back to caller
+func (s *StatusGroup) Err(err error) {
+	s.results <- err
+}
+
+// Returns an error if any of the spawned goroutines
+// return an error.  Only the last error is saved.
+// This function must be called last after the last
+// s.Register() function
+func (s *StatusGroup) Result() error {
+
+	// This goroutine will wait until all
+	// other privously spawned goroutines finish.
+	// Once they finish, it will close the channel
+	go func() {
+		s.wg.Wait()
+		close(s.results)
+	}()
+
+	// Read from the channel until close
+	for err := range s.results {
+		// Only save the last one
+		if err != nil {
+			s.err = err
+		}
+	}
+
+	return s.err
+}

vendor/github.com/heketi/heketi/pkg/utils/stringset.go

@@ -0,0 +1,51 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+import (
+	"sort"
+)
+
+type StringSet struct {
+	Set sort.StringSlice
+}
+
+// Create a string set.
+//
+// A string set is a list where each element appears only once
+func NewStringSet() *StringSet {
+	return &StringSet{
+		Set: make(sort.StringSlice, 0),
+	}
+}
+
+// Add a string to the string set
+func (s *StringSet) Add(v string) {
+	if !SortedStringHas(s.Set, v) {
+		s.Set = append(s.Set, v)
+		s.Set.Sort()
+	}
+}
+
+// Return string list
+func (s *StringSet) Strings() []string {
+	return s.Set
+}
+
+func (s *StringSet) Len() int {
+	return len(s.Set)
+}

vendor/github.com/heketi/heketi/pkg/utils/stringstack.go

@@ -0,0 +1,40 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+type StringStack struct {
+	list []string
+}
+
+func NewStringStack() *StringStack {
+	a := &StringStack{}
+	a.list = make([]string, 0)
+	return a
+}
+
+func (a *StringStack) IsEmpty() bool {
+	return len(a.list) == 0
+}
+
+func (a *StringStack) Pop() (x string) {
+	x, a.list = a.list[0], a.list[1:len(a.list)]
+	return
+}
+
+func (a *StringStack) Push(x string) {
+	a.list = append(a.list, x)
+}

vendor/github.com/heketi/heketi/pkg/utils/uuid.go

@@ -0,0 +1,34 @@
+//
+// Copyright (c) 2015 The heketi Authors
+//
+// 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 utils
+
+// From http://www.ashishbanerjee.com/home/go/go-generate-uuid
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"github.com/lpabon/godbc"
+)
+
+// Return a 16-byte uuid
+func GenUUID() string {
+	uuid := make([]byte, 16)
+	n, err := rand.Read(uuid)
+	godbc.Check(n == len(uuid), n, len(uuid))
+	godbc.Check(err == nil, err)
+
+	return hex.EncodeToString(uuid)
+}

vendor/github.com/lpabon/godbc/.gitignore

@@ -0,0 +1,23 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test

vendor/github.com/lpabon/godbc/.travis.yml

@@ -0,0 +1,13 @@
+language: go
+
+go:
+    - 1.1
+    - 1.2
+    - tip
+
+install:
+    - go get github.com/stretchr/testify
+
+script:
+    - go test
+    - go test -tags 'prod'

vendor/github.com/lpabon/godbc/AUTHORS

@@ -0,0 +1 @@
+lpabon@redhat.com

vendor/github.com/lpabon/godbc/LICENSE

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   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.

vendor/github.com/lpabon/godbc/README.md

@@ -0,0 +1,21 @@
+[![Build Status](https://travis-ci.org/lpabon/godbc.svg?branch=master)](https://travis-ci.org/lpabon/godbc)
+
+# godbc
+
+Design by contract for Go
+
+# Installation
+
+To install godbc, use `go get`:
+
+    go get github.com/lpabon/godbc
+
+Import the `godbc` package into your code using this template:
+
+    import (
+      "github.com/lpabon/godbc"
+    )
+
+# Documentation
+
+Documentation is available at https://godoc.org/github.com/lpabon/godbc

vendor/github.com/lpabon/godbc/godbc.go

@@ -0,0 +1,146 @@
+//+build !prod
+
+//
+// Copyright (c) 2014 The godbc Authors
+//
+// 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.
+
+// Design-by-Contract for Go
+//
+// Design by Contract is a programming methodology
+// which binds the caller and the function called to a
+// contract. The contract is represented using Hoare Triple:
+//      {P} C {Q}
+// where {P} is the precondition before executing command C,
+// and {Q} is the postcondition.
+//
+// See Also
+//
+// * http://en.wikipedia.org/wiki/Design_by_contract
+// * http://en.wikipedia.org/wiki/Hoare_logic
+// * http://dlang.org/dbc.html
+//
+// Usage
+//
+// Godbc is enabled by default, but can be disabled for production
+// builds by using the tag 'prod' in builds and tests as follows:
+//		go build -tags 'prod'
+// or
+// 		go test -tags 'prod'
+//
+package godbc
+
+import (
+	"errors"
+	"fmt"
+	"runtime"
+)
+
+// InvariantSimpleTester is an interface which provides a receiver to
+// test the object
+type InvariantSimpleTester interface {
+	Invariant() bool
+}
+
+// InvariantTester is an interface which provides not only an Invariant(),
+// but also a receiver to print the structure
+type InvariantTester interface {
+	InvariantSimpleTester
+	String() string
+}
+
+// dbc_panic prints to the screen information of the failure followed
+// by a call to panic()
+func dbc_panic(dbc_func_name string, b bool, message ...interface{}) {
+	if !b {
+
+		// Get caller information which is the caller
+		// of the caller of this function
+		pc, file, line, _ := runtime.Caller(2)
+		caller_func_info := runtime.FuncForPC(pc)
+
+		error_string := fmt.Sprintf("%s:\n\r\tfunc (%s) 0x%x\n\r\tFile %s:%d",
+			dbc_func_name,
+			caller_func_info.Name(),
+			pc,
+			file,
+			line)
+
+		if len(message) > 0 {
+			error_string += fmt.Sprintf("\n\r\tInfo: %+v", message)
+		}
+		err := errors.New(error_string)
+
+		// Finally panic
+		panic(err)
+	}
+}
+
+// Require checks that the preconditions are satisfied before
+// executing the function
+//
+// Example Code
+//
+// 		func Divide(a, b int) int {
+//			godbc.Require(b != 0)
+//			return a/b
+// 		}
+//
+func Require(b bool, message ...interface{}) {
+	dbc_panic("REQUIRE", b, message...)
+}
+
+// Ensure checks the postconditions are satisfied before returning
+// to the caller.
+//
+// Example Code
+//
+//		type Data struct {
+//			a int
+//		}
+//
+// 		func (*d Data) Set(a int) {
+//			d.a = a
+//			godbc.Ensure(d.a == a)
+// 		}
+//
+func Ensure(b bool, message ...interface{}) {
+	dbc_panic("ENSURE", b, message...)
+}
+
+// Check provides a simple assert
+func Check(b bool, message ...interface{}) {
+	dbc_panic("CHECK", b, message...)
+}
+
+// InvariantSimple calls the objects Invariant() receiver to test
+// the object for correctness.
+//
+// The caller object must provide an object that supports the
+// interface InvariantSimpleTester and does not need to provide
+// a String() receiver
+func InvariantSimple(obj InvariantSimpleTester, message ...interface{}) {
+	dbc_panic("INVARIANT", obj.Invariant(), message...)
+}
+
+// Invariant calls the objects Invariant() receiver to test
+// the object for correctness.
+//
+// The caller object must provide an object that supports the
+// interface InvariantTester
+//
+// To see an example, please take a look at the godbc_test.go
+func Invariant(obj InvariantTester, message ...interface{}) {
+	m := append(message, obj)
+	dbc_panic("INVARIANT", obj.Invariant(), m)
+}

vendor/github.com/lpabon/godbc/godbc_prod.go

@@ -0,0 +1,42 @@
+//+build prod
+
+//
+// Copyright (c) 2014 The godbc Authors
+//
+// 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 godbc
+
+type InvariantSimpleTester interface {
+	Invariant() bool
+}
+
+type InvariantTester interface {
+	InvariantSimpleTester
+	String() string
+}
+
+func Require(b bool, message ...interface{}) {
+}
+
+func Ensure(b bool, message ...interface{}) {
+}
+
+func Check(b bool, message ...interface{}) {
+}
+
+func InvariantSimple(obj InvariantSimpleTester, message ...interface{}) {
+}
+
+func Invariant(obj InvariantTester, message ...interface{}) {
+}