Kube-rs: creating a CronJob: 405 "the server does not allow this method on the requested resource"

[Ploppz]

Running minikube v1.8.1, and with

kube = "0.30.0"
k8s-openapi = { version = "0.7.1", features = ["v1_15"] }

(same with v1_17)

    use k8s_openapi::{
        apimachinery::pkg::apis::meta::v1::ObjectMeta,
        api::batch::v1beta1::{CronJob, CronJobSpec, CronJobStatus, JobTemplateSpec},
        api::batch::v1::JobSpec,
        api::core::v1::{PodTemplateSpec, PodSpec, Container},
    };
    use kube::{Api, api::PostParams, client::APIClient, config::load_kube_config};

    let config = load_kube_config().await.context(err::KubeError)?;
    let client = APIClient::new(config);
    let api = Api::<CronJob>::all(client);

    api.create(
        &PostParams::default(),
        &CronJob {
            metadata: Some(ObjectMeta {
                labels: Some(BTreeMap::from_iter(
                        [("name".into(), name.clone())].iter().cloned()
                )),
                ..Default::default()
            }),
            spec: Some(CronJobSpec {
                schedule: schedule.frequency.clone(),
                job_template: JobTemplateSpec {
                    spec: Some(JobSpec {
                        template: PodTemplateSpec {
                            spec: Some(PodSpec {
                                containers: vec![
                                    Container {
                                        name: "hello".into(),
                                        image: Some("busybox".into()),
                                        args: Some(vec!["/bin/sh".into(),
                                        "-c".into(),
                                        "date; echo Hello".into()]),
                                        ..Default::default()
                                    }
                                ],
                                restart_policy: Some("OnFailure".into()),
                                ..Default::default()
                            }),
                            metadata: None,
                        },
                        ..Default::default()
                    }),
                    metadata: None,
                },
                ..Default::default()
            }),
            status: None,
        }).await.context(err::KubeError)?;

I get error:

KubeError { source: Api(ErrorResponse { status: "Failure", message: "the server does not allow this method on the requested resource", reason: "MethodNotAllowed", code: 405 }) }

[clux]

MethodNotAllowed. Wtf. Ok, that is a strange. Thanks for the report. Will try to cross reference with the api later.

[clux]

Right, so I tried this on minikube running kubernetes 1.15 and with minor modifications, it worked. There's an attached commit (basically you only missed out the metadata.name - but that is required).

You might have gotten a newer version of cronjob than what your cluster supports.

[clux]

To expand a bit. Make sure you pin the k8s-openapi api feature to your cluster version. That's the only feasible reason I can see you getting method invalid. I never got that. The example in that branch worked fine.

[Ploppz]

Thanks! From your example I saw that you use a namespace "default" while I had let api = Api::<CronJob>::all(client);. With namespace "default" it works for me too.

[clux]

Oh right. Yeah, cronjob is not a cluster level resource! That's a thing we might be able to improve elsewhere.