How to create ingress in Kubernetes V1.23.1 version ?

[fengqiao117]

I referred to the sample code, but it did not compile successfully. I am using Kubernetes-Client version 5.12.1

Ingress ingress = new IngressBuilder() .withNewMetadata().withName("test-ingress").addToAnnotations("nginx.ingress.kubernetes.io/rewrite-target", "/").endMetadata() .withNewSpec() .addNewRule() .withNewHttp() .addNewPath() .withPath("/testPath").withNewBackend().withServiceName("test").withServicePort(new IntOrString(80)).endBackend() .endPath() .endHttp() .endRule() .endSpec() .build(); client.network().ingress().inNamespace("default").create(ingress);

But I compiled successfully in V4.12.0 using the following methods:
client.extensions().ingresses().createorreplace (ingress);

[rohanKanojia]

@fengqiao117 : You might be looking for io.fabric8.kubernetes.api.model.networking.v1.IngressBuilder . Does this work for you:

client.network().v1().ingresses().inNamespace("ns1").createOrReplace(ingress)

[fengqiao117]

For example the ingress case would be like this:

Ingress ingress = new IngressBuilder()
                .withNewMetadata().withName("test-ingress").addToAnnotations("nginx.ingress.kubernetes.io/rewrite-target", "/").endMetadata()
                .withNewSpec()
                .addNewRule()
                .withNewHttp()
                .addNewPath().withPathType("Prefix")
                .withPath("/"+"fims-web"+"/(.+)").withBackend(new IngressBackend())
                .endPath()
                .endHttp()
                .endRule()
                .endSpec()
                .build();
        client.network().v1().ingresses().inNamespace("default").createOrReplace(ingress);

The error message is as follows

Exception in thread "main" io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: POST at: https://10.1.22.98:6443/apis/networking.k8s.io/v1/namespaces/default/ingresses. Message: Ingress.extensions "test-ingress" is invalid: spec.rules[0].http.paths[0].backend: Invalid value: "": resource or service backend is required. Received status: Status(apiVersion=v1, code=422, details=StatusDetails(causes=[StatusCause(field=spec.rules[0].http.paths[0].backend, message=Invalid value: "": resource or service backend is required, reason=FieldValueInvalid, additionalProperties={})], group=extensions, kind=Ingress, name=test-ingress, retryAfterSeconds=null, uid=null, additionalProperties={}), kind=Status, message=Ingress.extensions "test-ingress" is invalid: spec.rules[0].http.paths[0].backend: Invalid value: "": resource or service backend is required, metadata=ListMeta(_continue=null, remainingItemCount=null, resourceVersion=null, selfLink=null, additionalProperties={}), reason=Invalid, status=Failure, additionalProperties={}).
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.requestFailure(OperationSupport.java:682)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.requestFailure(OperationSupport.java:661)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.assertResponseCode(OperationSupport.java:612)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:555)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:518)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleCreate(OperationSupport.java:305)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleCreate(BaseOperation.java:644)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleCreate(BaseOperation.java:83)
at io.fabric8.kubernetes.client.dsl.base.CreateOnlyResourceOperation.create(CreateOnlyResourceOperation.java:61)
at io.fabric8.kubernetes.client.utils.CreateOrReplaceHelper.createOrReplace(CreateOrReplaceHelper.java:48)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:318)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:83)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:308)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:83)
at fdec.deploy.IngressExample.main(IngressExample.java:30)

Kubernetes API Server version

v1.22.1

Fabric8 Kubernetes Client version

5.12.1

Can you give me a successful example ?

ingress controller version

image: k8s.gcr.io/ingress-nginx/controller:v1.1.1

[fengqiao117]

For example the ingress case would be like this:

Ingress ingress = new IngressBuilder()
                .withNewMetadata().withName("test-ingress").addToAnnotations("nginx.ingress.kubernetes.io/rewrite-target", "/").endMetadata()
                .withNewSpec()
                .addNewRule()
                .withNewHttp()
                .addNewPath().withPathType("Prefix")
                .withPath("/"+"fims-web"+"/(.+)").withBackend(new IngressBackend())
                .endPath()
                .endHttp()
                .endRule()
                .endSpec()
                .build();
        client.network().v1().ingresses().inNamespace("default").createOrReplace(ingress);

The error message is as follows

Exception in thread "main" io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: POST at: https://10.1.22.98:6443/apis/networking.k8s.io/v1/namespaces/default/ingresses. Message: Ingress.extensions "test-ingress" is invalid: spec.rules[0].http.paths[0].backend: Invalid value: "": resource or service backend is required. Received status: Status(apiVersion=v1, code=422, details=StatusDetails(causes=[StatusCause(field=spec.rules[0].http.paths[0].backend, message=Invalid value: "": resource or service backend is required, reason=FieldValueInvalid, additionalProperties={})], group=extensions, kind=Ingress, name=test-ingress, retryAfterSeconds=null, uid=null, additionalProperties={}), kind=Status, message=Ingress.extensions "test-ingress" is invalid: spec.rules[0].http.paths[0].backend: Invalid value: "": resource or service backend is required, metadata=ListMeta(_continue=null, remainingItemCount=null, resourceVersion=null, selfLink=null, additionalProperties={}), reason=Invalid, status=Failure, additionalProperties={}).
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.requestFailure(OperationSupport.java:682)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.requestFailure(OperationSupport.java:661)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.assertResponseCode(OperationSupport.java:612)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:555)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:518)
at io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleCreate(OperationSupport.java:305)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleCreate(BaseOperation.java:644)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleCreate(BaseOperation.java:83)
at io.fabric8.kubernetes.client.dsl.base.CreateOnlyResourceOperation.create(CreateOnlyResourceOperation.java:61)
at io.fabric8.kubernetes.client.utils.CreateOrReplaceHelper.createOrReplace(CreateOrReplaceHelper.java:48)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:318)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:83)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:308)
at io.fabric8.kubernetes.client.dsl.base.BaseOperation.createOrReplace(BaseOperation.java:83)
at fdec.deploy.IngressExample.main(IngressExample.java:30)

Kubernetes API Server version

v1.22.1

Fabric8 Kubernetes Client version

5.12.1

Can you give me a successful example ?

ingress controller version

image: k8s.gcr.io/ingress-nginx/controller:v1.1.1

[shawkins]

The error message is related to PUT performed by createOrReplace. See #3896 and related issues. Fabric8 6 will have basic support for server side apply #3334 - until then you may want to use something like:

// build the ingress keeping the other parts of the existing spec
Ingress buildOrEdit(IngressBuilder builder) {
  return builder.withNewMetadata().withName("test-ingress").addToAnnotations("nginx.ingress.kubernetes.io/rewrite-target", "/").endMetadata()
                .editOrNewSpec()
                .withRules(new IngressRuleBuilder()
                .withNewHttp()
                .addNewPath().withPathType("Prefix")
                .withPath("/"+"fims-web"+"/(.+)").withBackend(new IngressBackend())
                .endPath()
                .endHttp()
                .build())
                .endSpec()
                .build();
}

var ingresses = client.network().v1().ingresses().inNamespace("default");

try {
  ingresses.edit(i -> buildOrEdit(new IngressBuilder(i)));
} catch (KubernetesClientException e) {
  if (e.getCode() != 404) {
    throw e;
  }
  ingresses.create(buildOrEdit(new IngressBuilder());
}

This avoids a PUT on replace and when the diff is computed for an edit the buildOrEdit function will make sure that generated fields are retained.

[manusa]

I'm not sure, but maybe the IngressBackend definition is also incomplete.

[fengqiao117]

Resolved,Modify the code as follows:
import io.fabric8.kubernetes.api.model.networking.v1.Ingress;
import io.fabric8.kubernetes.api.model.networking.v1.IngressBuilder;

thanks!