Merge pull request #305 from rqlite/aws_network
Add simple client for fetching AWS EC2 metadatamaster
commit
a4e3698b85
@ -0,0 +1,46 @@
|
||||
package aws
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io/ioutil"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
type MetadataClient struct {
|
||||
client *http.Client
|
||||
URL string
|
||||
}
|
||||
|
||||
func NewMetadataClient() *MetadataClient {
|
||||
return &MetadataClient{
|
||||
client: &http.Client{},
|
||||
URL: `http://169.254.169.254/`,
|
||||
}
|
||||
}
|
||||
|
||||
func (m *MetadataClient) LocalIPv4() (string, error) {
|
||||
return m.get("/latest/meta-data/local-ipv4")
|
||||
}
|
||||
|
||||
func (m *MetadataClient) PublicIPv4() (string, error) {
|
||||
return m.get("/latest/meta-data/public-ipv4")
|
||||
}
|
||||
|
||||
func (m *MetadataClient) get(path string) (string, error) {
|
||||
resp, err := m.client.Get(m.URL + path)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
defer resp.Body.Close()
|
||||
|
||||
b, err := ioutil.ReadAll(resp.Body)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
if resp.StatusCode != http.StatusOK {
|
||||
return "", fmt.Errorf("failed to request %s, got: %s", path, resp.Status)
|
||||
}
|
||||
return string(b), nil
|
||||
}
|
@ -0,0 +1,89 @@
|
||||
package aws
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/http"
|
||||
"net/http/httptest"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func Test_NewMetadataClient(t *testing.T) {
|
||||
c := NewMetadataClient()
|
||||
if c == nil {
|
||||
t.Fatalf("failed to create new Metadata client")
|
||||
}
|
||||
}
|
||||
|
||||
func Test_MetadataClient_LocalIPv4(t *testing.T) {
|
||||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if r.Method != "GET" {
|
||||
t.Fatalf("Client did not use GET")
|
||||
}
|
||||
if r.URL.String() != "/latest/meta-data/local-ipv4" {
|
||||
t.Fatalf("Request URL is wrong, got: %s", r.URL.String())
|
||||
}
|
||||
fmt.Fprint(w, "172.31.34.179")
|
||||
}))
|
||||
defer ts.Close()
|
||||
|
||||
c := NewMetadataClient()
|
||||
c.URL = ts.URL
|
||||
addr, err := c.LocalIPv4()
|
||||
if err != nil {
|
||||
t.Fatalf("failed to get local IPv4 address: %s", err.Error())
|
||||
}
|
||||
if addr != "172.31.34.179" {
|
||||
t.Fatalf("got incorrect local IPv4 address: %s", addr)
|
||||
}
|
||||
}
|
||||
|
||||
func Test_MetadataClient_LocalIPv4Fail(t *testing.T) {
|
||||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
w.WriteHeader(http.StatusBadRequest)
|
||||
}))
|
||||
defer ts.Close()
|
||||
|
||||
c := NewMetadataClient()
|
||||
c.URL = ts.URL
|
||||
_, err := c.LocalIPv4()
|
||||
if err == nil {
|
||||
t.Fatalf("failed to get error when server returned 400")
|
||||
}
|
||||
}
|
||||
|
||||
func Test_MetadataClient_PublicIPv4(t *testing.T) {
|
||||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
if r.Method != "GET" {
|
||||
t.Fatalf("Client did not use GET")
|
||||
}
|
||||
if r.URL.String() != "/latest/meta-data/public-ipv4" {
|
||||
t.Fatalf("Request URL is wrong, got: %s", r.URL.String())
|
||||
}
|
||||
fmt.Fprint(w, "52.38.41.98")
|
||||
}))
|
||||
defer ts.Close()
|
||||
|
||||
c := NewMetadataClient()
|
||||
c.URL = ts.URL
|
||||
addr, err := c.PublicIPv4()
|
||||
if err != nil {
|
||||
t.Fatalf("failed to get local IPv4 address: %s", err.Error())
|
||||
}
|
||||
if addr != "52.38.41.98" {
|
||||
t.Fatalf("got incorrect local IPv4 address: %s", addr)
|
||||
}
|
||||
}
|
||||
|
||||
func Test_MetadataClient_PublicIPv4Fail(t *testing.T) {
|
||||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
w.WriteHeader(http.StatusBadRequest)
|
||||
}))
|
||||
defer ts.Close()
|
||||
|
||||
c := NewMetadataClient()
|
||||
c.URL = ts.URL
|
||||
_, err := c.PublicIPv4()
|
||||
if err == nil {
|
||||
t.Fatalf("failed to get error when server returned 400")
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue