Question

我想为kubernetes节点添加扩展资源，我可以通过以下所示的curl命令来做到这一点： https://kubernetes.io/docs/tasks/administer-cluster/extended-resource-node/，即：

curl --header "Content-Type: application/json-patch+json" \
--request PATCH \
--data '[{"op": "add", "path": "/status/capacity/example.com~1dongle", 
"value": "4"}]' \
http://localhost:8001/api/v1/nodes/<your-node-name>/status

然后，我可以创建一个需要example.com/dongle资源的pod。

但是，如何使用fabric8 Java API做到这一点？

我在与所有节点相关的API的Java演示应用程序中尝试了此操作，但是它不起作用。片段代码如下：

String ns = "thisisatest";
String master = "http://192.168.1.45:8080/";

Config config = new ConfigBuilder().withMasterUrl(master).build();
try (KubernetesClient client = new DefaultKubernetesClient(config)) {
  try {
    if(client.namespaces().withName(ns).get() == null) {
      log("Create namespace:", client.namespaces().create(new NamespaceBuilder().withNewMetadata().withName(ns).endMetadata().build()));
    }

    String podNameWithExtRes = "k8s-n1";

    /*step 1: patch extended resource*/
    NodeStatus ndStatus = client.nodes().withName(podNameWithExtRes).get().getStatus();
    Map<String, Quantity> ndCap = ndStatus.getCapacity();
    ndCap.put("example.com/dongle", new Quantity("2"));
    ndStatus.setCapacity(ndCap);
    log("status info: \n", ndStatus.toString());
    // ndStatus.setAllocatable(mapSrc);
    Node n1 = client.nodes().withName(podNameWithExtRes).get();
    n1.setStatus(ndStatus);
    // client.nodes().withName(podNameWithExtRes).delete(); // it can be deleted successfully
    // client.nodes().create(n1); // error
    client.nodes().createOrReplace(n1);

    log("n1 status: \n", n1.getStatus().toString());
    log("get node status: \n", client.nodes().withName(podNameWithExtRes).get().getStatus().toString());
    // ...
  }
}

在一开始，我没有添加client.nodes（）。create *子句，但是它没有任何效果。我意识到可能需要回写设置。但是，即使我添加了它，也不会生效。

createOrReplace（）运行无错误，但不会将效果保存到节点。

“ n1状态”的日志：

capacity={cpu=Quantity(amount=4, format=null,additionalProperties={}), ..., pods=Quantity(amount=110, format=null, additionalProperties={}), example.com/dongle=Quantity(amount=2, format=null, additionalProperties={})},

“获取节点状态”的日志：

capacity={cpu=Quantity(amount=4, format=null, additionalProperties={}), ..., pods=Quantity(amount=110, format=null, additionalProperties={})},

而且，当我在终端中运行命令时，它什么也没有响应：

kubectl describe node k8s-n1 | grep dongle

create（n1）提示以下错误：

io.fabric8.kubernetes.client.KubernetesClientException：执行失败：POST位于http://192.168.1.45:8080/api/v1/nodes。消息：不应在要创建的对象上设置resourceVersion。收到的状态：不应在要创建的对象上设置Status（apiVersion = v1，code = 500，Details = null，kind = Status，message = resourceVersion，meta = ListMeta（_continue = null，resourceVersion = null，selfLink = null，另外，PropertyProperties = {}），原因= null，状态= Failure，additionalProperties = {}）。

如何使其工作？

Answer 1

我尝试了以下更多的fabric8 API，但它们都不起作用：

// client.nodes().withName(podNameWithExtRes).get().setStatus(ndStatus); // not working
// client.nodes().withName(podNameWithExtRes).patch(n1); // not working
// client.nodes().withName(podNameWithExtRes).patch(n1).setStatus(ndStatus); // not working
// client.nodes().withName(podNameWithExtRes).edit().withStatus(ndStatus).done(); // not working
// client.nodes().withName(podNameWithExtRes).edit().withStatus(ndStatus).buildStatus(); // not working
// client.nodes().withName(podNameWithExtRes).replace(n1); // not working

最后，我通过一种变通办法使其工作：

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

private static void patchRequest(String request) throws IOException {
try {
  String urlStr = "http://192.168.1.45:8080/api/v1/nodes/k8s-n1/status";
  String requestContents = "[{\"op\": \"" + request + "\", \"path\": \"/status/capacity/example.com~1dongle\", \"value\": \"2\"}]";

  CloseableHttpClient httpclient = HttpClients.createDefault();
  HttpPatch newPatch = new HttpPatch(urlStr);
  newPatch.setEntity(new StringEntity(requestContents, ContentType.parse("application/json-patch+json")));
  HttpResponse response = httpclient.execute(newPatch);

  logger.info(response.toString());
  String resultBody = EntityUtils.toString(response.getEntity());
  EntityUtils.consume(response.getEntity());
  logger.info("Response Code : " + response.getStatusLine().getStatusCode());
  logger.info(resultBody);
  httpclient.close();
} catch (IOException e) {
  logger.error("patchRequest exception:", e);
  throw e;
}
}

public static void main(String[] args) {
  // ...
  try {
      logger.info("add the extended resource");
      patchRequest("add");
      // ...
      log("get node status: \n", client.nodes().withName(podNameWithExtRes).get().getStatus().toString());
      // ...
      logger.info("remove the extended resource");
      patchRequest("remove");
  } catch (IOException e) {
    logger.error(e.getMessage(), e);
  }
  // ...
}

现在，“获取节点状态”的日志：

capacity={cpu=Quantity(amount=4, format=null, additionalProperties={}), example.com/dongle=Quantity(amount=1, format=null, additionalProperties={}), ... pods=Quantity(amount=110, format=null, additionalProperties={})},

如何使用Fabric8 API公布节点的扩展资源

1 个答案: