add vault/etcd

config/source/vault/vault.go

@@ -0,0 +1,96 @@
+package vault
+
+import (
+	"fmt"
+	"github.com/hashicorp/vault/api"
+	"github.com/micro/go-micro/config/source"
+	"time"
+)
+
+// Currently a single vault reader
+type vault struct {
+	secretPath string
+	secretName string
+	opts       source.Options
+	client     *api.Client
+}
+
+func (c *vault) Read() (*source.ChangeSet, error) {
+	secret, err := c.client.Logical().Read(c.secretPath)
+	if err != nil {
+		return nil, err
+	}
+
+	if secret == nil {
+		return nil, fmt.Errorf("source not found: %s", c.secretPath)
+	}
+
+	if secret.Data == nil && secret.Warnings != nil {
+		return nil, fmt.Errorf("source: %s errors: %v", c.secretPath, secret.Warnings)
+	}
+
+	data, err := makeMap(secret.Data, c.secretName)
+	if err != nil {
+		return nil, fmt.Errorf("error reading data: %v", err)
+	}
+
+	b, err := c.opts.Encoder.Encode(data)
+	if err != nil {
+		return nil, fmt.Errorf("error reading source: %v", err)
+	}
+
+	cs := &source.ChangeSet{
+		Timestamp: time.Now(),
+		Format:    c.opts.Encoder.String(),
+		Source:    c.String(),
+		Data:      b,
+	}
+	cs.Checksum = cs.Sum()
+
+	return cs, nil
+	//return nil, nil
+}
+
+func (c *vault) String() string {
+	return "vault"
+}
+
+func (c *vault) Watch() (source.Watcher, error) {
+	w := newWatcher(c.client)
+
+	return w, nil
+}
+
+// NewSource creates a new vault source
+func NewSource(opts ...source.Option) source.Source {
+	options := source.NewOptions(opts...)
+
+	// create the client
+	client, _ := api.NewClient(api.DefaultConfig())
+
+	// get and set options
+	if address := getAddress(options); address != "" {
+		_ = client.SetAddress(address)
+	}
+
+	if nameSpace := getNameSpace(options); nameSpace != "" {
+		client.SetNamespace(nameSpace)
+	}
+
+	if token := getToken(options); token != "" {
+		client.SetToken(token)
+	}
+
+	path := getResourcePath(options)
+	name := getSecretName(options)
+	if name == "" {
+		name = path
+	}
+
+	return &vault{
+		opts:       options,
+		client:     client,
+		secretPath: path,
+		secretName: name,
+	}
+}