func checkEtcdVersion(cluster platform.Cluster, m platform.Machine, expected string) error {
const (
retries = 5
retryWait = 3 * time.Second
)
var err error
var b []byte
for i := 0; i < retries; i++ {
cmd := cluster.NewCommand("curl", "-L", fmt.Sprintf("http://%v:2379/version", m.IP()))
b, err = cmd.Output()
if err != nil {
plog.Infof("retrying version check, hit failure %v", err)
time.Sleep(retryWait)
continue
}
break
}
if err != nil {
return fmt.Errorf("curling version: %v", err)
}
plog.Infof("got version: %s", b)
if string(b) != expected {
return fmt.Errorf("expected %v, got %s", expected, b)
}
return nil
}
// setKeys sets n random keys and values across each machine in a
// cluster and returns these values to later be checked with checkKeys.
// If all the values don't get set due to a machine that is down and
// error is NOT returned. An error is returned if no keys are able to be
// set.
func setKeys(cluster platform.Cluster, n int) (map[string]string, error) {
var written = map[string]string{}
for _, m := range cluster.Machines() {
for i := 0; i < n; i++ {
// random key and value, may overwrwite previous sets if
// collision which is fine
key := strconv.Itoa(rand.Int())[0:3]
value := strconv.Itoa(rand.Int())[0:3]
cmd := cluster.NewCommand("curl", "-w", "%{http_code}", "-s", fmt.Sprintf("http://%v:2379/v2/keys/%v", m.IP(), key), "-XPUT", "-d", "value="+value)
b, err := cmd.Output()
if err != nil {
continue
}
// check for 201 or 200 resp header
if !bytes.HasSuffix(b, []byte("200")) && !bytes.HasSuffix(b, []byte("201")) {
continue
}
written[key] = value
}
}
if len(written) == 0 {
return nil, fmt.Errorf("failed to write any keys")
}
plog.Infof("wrote %v keys", len(written))
return written, nil
}
func checkEtcdVersion(cluster platform.Cluster, m platform.Machine, expected string) error {
var b []byte
var err error
checker := func() error {
cmd := cluster.NewCommand("curl", "-L", fmt.Sprintf("http://%v:2379/version", m.IP()))
b, err = cmd.Output()
if err != nil {
return fmt.Errorf("curl failed: %v", err)
}
return nil
}
if err := util.Retry(15, 10*time.Second, checker); err != nil {
return err
}
plog.Infof("got version: %s", b)
if string(b) != expected {
return fmt.Errorf("expected %v, got %s", expected, b)
}
return nil
}
// checkKeys tests that each node in the cluster has the full provided
// key set in keyMap. Quorum get must be used.
func checkKeys(cluster platform.Cluster, keyMap map[string]string) error {
for i, m := range cluster.Machines() {
for k, v := range keyMap {
cmd := cluster.NewCommand("curl", fmt.Sprintf("http://%v:2379/v2/keys/%v?quorum=true", m.IP(), k))
b, err := cmd.Output()
if err != nil {
return fmt.Errorf("error curling key: %v", err)
}
var jsonMap map[string]interface{}
err = json.Unmarshal(b, &jsonMap)
if err != nil {
return err
}
// error code?
errorCode, ok := jsonMap["errorCode"]
if ok {
msg := jsonMap["message"]
return fmt.Errorf("machine %v errorCode %v: %v: %s", i, errorCode, msg, b)
}
node, ok := jsonMap["node"]
if !ok {
return fmt.Errorf("retrieving key in CheckKeys, no node in resp")
}
n := node.(map[string]interface{})
value, ok := n["value"]
if !ok {
return fmt.Errorf("retrieving key in CheckKeys, no value in resp")
}
if value != v {
return fmt.Errorf("checkKeys got incorrect value! expected:%v got: %v", v, value)
}
}
}
plog.Infof("checked %v keys", len(keyMap))
return nil
}