Kubernetes client-python 创建服务错误

Question

我正在尝试为我node-js-deployment在 GCE 主机 Kubernetes Cluster 中命名的部署之一创建一个新服务

我按照文档来create_namespaced_service

这是服务数据：

{
    "kind": "Service",
    "apiVersion": "v1",
    "metadata": {
        "name": "node-js-service"
    },
    "spec": {
        "selector": {
            "app": "node-js"
        },
        "ports": [
            {
                "protocol": "TCP",
                "port": 80,
                "targetPort": 8000
            }
        ]
    }
}

这是创建服务的 Python 函数

api_instance = kubernetes.client.CoreV1Api()
namespace = 'default'  

body = kubernetes.client.V1Service()  # V1Serice

# Creating Meta Data
metadata = kubernetes.client.V1ObjectMeta()
metadata.name = "node-js-service"

# Creating spec 
spec = kubernetes.client.V1ServiceSpec()

# Creating Port object
ports = kubernetes.client.V1ServicePort()
ports.protocol = 'TCP'
ports.target_port = 8000
ports.port = 80

spec.ports = ports
spec.selector = {"app": "node-js"}

body.spec = spec


try:
    api_response = api_instance.create_namespaced_service(namespace, body, pretty=pretty)
    pprint(api_response)
except ApiException as e:
    print("Exception when calling CoreV1Api->create_namespaced_service: %s\n" % e)

错误：

Reason: Bad Request
HTTP response headers: HTTPHeaderDict({'Content-Type': 'application/json', 'Date': 'Tue, 21 Feb 2017 03:54:55 GMT', 'Content-Length': '227'})
HTTP response body: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"Service in version \"v1\" cannot be handled as a Service: only encoded map or array can be decoded into a struct","reason":"BadRequest","code":400}

但是，如果我传递 JSON，则正在创建该服务。不知道我做错了什么。

非常感谢任何帮助，谢谢。

Answer 1

通过阅读您的代码，您似乎错过了将元数据分配给body.metadata. 而且您错过了该ports字段V1ServiceSpec应该是一个列表，但是您使用了一个单一的V1ServicePort所以没有测试我认为这应该有效：

api_instance = kubernetes.client.CoreV1Api()
namespace = 'default'

body = kubernetes.client.V1Service()  # V1Serice

# Creating Meta Data
metadata = kubernetes.client.V1ObjectMeta()
metadata.name = "node-js-service"

body.metadata = metadata

# Creating spec
spec = kubernetes.client.V1ServiceSpec()

# Creating Port object
port = kubernetes.client.V1ServicePort()
port.protocol = 'TCP'
port.target_port = 8000
port.port = 80

spec.ports = [ port ]
spec.selector = {"app": "node-js"}

body.spec = spec

该定义也可以直接从 json / yaml 加载，如官方存储库中的两个示例所示 - 请参阅exec.py create_deployment.py。

您的解决方案可能如下所示：

api_instance = kubernetes.client.CoreV1Api()
namespace = 'default'

manifest = {
    "kind": "Service",
    "apiVersion": "v1",
    "metadata": {
        "name": "node-js-service"
    },
    "spec": {
        "selector": {
            "app": "node-js"
        },
        "ports": [
            {
                "protocol": "TCP",
                "port": 80,
                "targetPort": 8000
            }
        ]
    }
}

try:
    api_response = api_instance.create_namespaced_service(namespace, manifest, pretty='true')
    pprint(api_response)
except ApiException as e:
    print("Exception when calling CoreV1Api->create_namespaced_endpoints: %s\n" % e)