Download-connector-plugins-from-a-custom-url fails "error converting YAML to JSON: yaml: line 10: did not find expected key"

Kafka Connect Self-Managed Connectors
1

Following the instructions at Configure Kafka Connect for Confluent Platform Using Confluent for Kubernetes | Confluent Documentation. On line 10, the key I have is the same as in the example (url)
(forums complains about links in my post, so I have replaced some with …)

$ kubectl apply -f connector.yaml
error: error parsing connector.yaml: error converting YAML to JSON: yaml: line 10: did not find expected key

kind: Connect
metadata:
  annotations:
  platform.confluent.io/connector-wget-extra-args: --no-check-certificate
spec:
  build:
    type: onDemand                                   
    onDemand:                                        
      plugins:
        url: ...
        - name: Couchbase_Kafka_Connector_4.2.7
          archivePath: ... 
          checksum:   b2aff22e3020ed8115bf7e259559c90e
      storageLimit: 4G

Edit: url is just the header for name, archivePath, checksum. It does not take a value. The actual url is “archive path”. It would be useful to have an example inline vs. a pointer to a git repo.
After fixing that
error: error validating “connector.yaml”: error validating data: apiVersion not set; if you choose to ignore these errors, turn validation off with --validate=false

After fixing that with --validate=false

error: resource mapping not found for name: "" namespace: "" from "connector.yaml": no matches for kind "Connect" in version ""

 kubectl get pods
NAME                                  READY   STATUS    RESTARTS       AGE
confluent-operator-68f4bf8785-hnvwt   1/1     Running   5 (19h ago)    3d1h
connect-0                             1/1     Running   4 (19h ago)    3d1h
controlcenter-0                       1/1     Running   9 (19h ago)    3d1h
elastic-0                             1/1     Running   7 (19h ago)    3d1h
kafka-0                               1/1     Running   7 (19h ago)    3d1h
kafka-1                               1/1     Running   7 (19h ago)    3d1h
kafka-2                               1/1     Running   7 (19h ago)    3d1h
kafkarestproxy-0                      1/1     Running   3 (19h ago)    3d1h
ksqldb-0                              1/1     Running   9 (19h ago)    3d1h
schemaregistry-0                      1/1     Running   10 (19h ago)   3d1h
schemaregistry-1                      1/1     Running   10 (19h ago)   3d1h
schemaregistry-2                      1/1     Running   10 (19h ago)   3d1h
zookeeper-0                           1/1     Running   3 (19h ago)    3d1h
zookeeper-1                           1/1     Running   3 (19h ago)    3d1h
zookeeper-2                           1/1     Running   3 (19h ago)    3d1h

$ kubectl get namespaces
NAME              STATUS   AGE
confluent         Active   3d2h
default           Active   3d2h
kube-node-lease   Active   3d2h
kube-public       Active   3d2h
kube-system       Active   3d2h

A little further…

$ cat connector.yaml 
apiVersion: platform.confluent.io/v1beta1
kind: Connect
namespace: confluent
metadata:
  name: kafka-connect-couchbase
  namespace: confluent
  annotations:
  platform.confluent.io/connector-wget-extra-args: --no-check-certificate
spec:
  build:
    type: onDemand                                   
    onDemand:                                        
      plugins:
        url: 
        - name: Couchbase_Kafka_Connector_4.2.7
          archivePath: https://packages.couchbase.com/clients/kafka/4.2.7/couchbase-kafka-connect-couchbase-4.2.7.zip
          checksum:   b2aff22e3020ed8115bf7e259559c90e
      storageLimit: 4G
 $ kubectl apply --validate=false  -f connector.yaml 
The Connect "kafka-connect-couchbase" is invalid: spec.image: Required value
$

adding image to spec and it works. Maybe someone could update the instructions?

spec:
  image:
    application: confluentinc/cp-server-connect:7.0.1
    init: confluentinc/confluent-init-container:2.2.0-1