periodSeconds: 15
  timeoutSeconds: 10
  successThreshold: 1
  failureThreshold: 3
```

## Cluster probe

### Cluster-writeable probe

The reply is '200 OK' if cluster has write quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1

        self.open = True


def dep_session() -> Any:
    s = Session()
    yield s
    s.open = False


def raise_after_yield() -> Any:
    yield
    raise HTTPException(status_code=503, detail="Exception after yield")


SessionFuncDep = Annotated[Session, Depends(dep_session, scope="function")]
SessionRequestDep = Annotated[Session, Depends(dep_session, scope="request")]

    assertThat(statusLine.protocol).isEqualTo(Protocol.HTTP_1_1)
    assertThat(statusLine.code).isEqualTo(code)
  }

  @Test
  fun emptyMessage() {
    val version = 1
    val code = 503
    val statusLine = parse("HTTP/1.$version $code ")
    assertThat(statusLine.message).isEqualTo("")
    assertThat(statusLine.protocol).isEqualTo(Protocol.HTTP_1_1)
    assertThat(statusLine.code).isEqualTo(code)
  }

        assertEquals(cause, exception.getCause());
    }

    @Test
    public void test_constructor_withStatusCodeAndException() {
        // Test constructor with status code and exception
        int statusCode = 503;
        String causeMessage = "Service temporarily unavailable";
        Exception cause = new IllegalStateException(causeMessage);

        WebApiException exception = new WebApiException(statusCode, cause);

		} else {
			interfaceFound = true
		}
	}
	if !interfaceFound {
		return nil, errors.New("no available interface found")
	}

	// Wrap given handler to do additional
	// * return 503 (service unavailable) if the server in shutdown.
	wrappedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// If server is in shutdown.
		if atomic.LoadUint32(&srv.inShutdown) != 0 {

   *    has since been closed by the server.
   *  * A client timeout (HTTP 408).
   *  * A authorization challenge (HTTP 401 and 407) that is satisfied by the [Authenticator].
   *  * A retryable server failure (HTTP 503 with a `Retry-After: 0` response header).
   *  * A misdirected request (HTTP 421) on a coalesced connection.
   */
  open fun isOneShot(): Boolean = false

  /**
   * Returns the SHA-256 hash of this [RequestBody]

Krishnan Parthasarathi <******@****.***> 1618853442 -0700

	if cred.AccessKey != accessKey {
		if !globalIAMSys.Initialized() {
			// Check if server has initialized, then only proceed
			// to check for IAM users otherwise its okay for clients
			// to retry with 503 errors when server is coming up.
			return auth.Credentials{}, false, ErrIAMNotInitialized
		}

		// Check if the access key is part of users credentials.
		u, ok, err := globalIAMSys.CheckKey(r.Context(), accessKey)

Shinsuke Sugaya <******@****.***> 1772848386 +0900