[release-0.17] Propagate the entire delivery spec to the Channel (#4042)

[pierDipi]

The subscription reconciler didn't propagate the entire deliverySpec
to the channel, only the deadLetterSink was propagated.

Signed-off-by: Pierangelo Di Pilato pierangelodipilato@gmail.com

Proposed Changes

• Propagate the entire delivery spec to the Channel (Propagate the entire delivery spec to the Channel #4042)

Release Note

- 🐛 Fix bug
The subscription reconciler correctly propagates delivery configurations to the channel (`retry`, `backoffDelay`, `backoffPolicy`).

[pierDipi]

/cc @slinkydeveloper @matzew

[knative-metrics-robot]

The following is the coverage report on the affected files.
Say /test pull-knative-eventing-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/reconciler/subscription/subscription.go	76.2%	82.7%	6.5

[matzew]

/lgtm

[aliok]

/lgtm
/approve

I think the reason for the missing propagation is because of the API shape change that happened. Probably things were forgotten.

Bad thing is, no tests caught this :(

Thanks for the fix

[matzew]

Bad thing is, no tests caught this :(

how about we add one more test ? 😄

[knative-test-reporter-robot]

The following jobs failed:

Test name	Triggers	Retries
pull-knative-eventing-integration-tests		0/3

Failed non-flaky tests preventing automatic retry of pull-knative-eventing-integration-tests:

test/e2e.TestBrokerChannelFlowTriggerV1BrokerV1/Channel-messaging.knative.dev/v1beta1
test/e2e.TestBrokerChannelFlowTriggerV1BrokerV1
.Test

[pierDipi]

    broker_channel_flow_helper.go:157: Failed to get the url for the channel "e2e-brokerchannel-channel": addressable does not have an Address: &{TypeMeta:{Kind:Channel APIVersion:messaging.knative.dev/v1beta1} ObjectMeta:{Name:e2e-brokerchannel-channel GenerateName: Namespace:test-broker-channel-flow-trigger-v1-broker-v1-channel-messgspfz SelfLink:/apis/messaging.knative.dev/v1beta1/namespaces/test-broker-channel-flow-trigger-v1-broker-v1-channel-messgspfz/channels/e2e-brokerchannel-channel UID:b2ac6588-f1a4-4e18-9730-49d20479f153 ResourceVersion:43759 Generation:1 CreationTimestamp:2020-09-14 12:36:47 +0000 UTC DeletionTimestamp:<nil> DeletionGracePeriodSeconds:<nil> Labels:map[] Annotations:map[messaging.knative.dev/creator:prow-job@knative-tests.iam.gserviceaccount.com messaging.knative.dev/lastModifier:prow-job@knative-tests.iam.gserviceaccount.com messaging.knative.dev/subscribable:v1beta1] OwnerReferences:[] Finalizers:[] ClusterName: ManagedFields:[]} Status:{Address:<nil>}}
        knative.dev/eventing/test/lib.(*Client).GetAddressableURI

it's a known issue: #3686

[pierDipi]

/retest

[slinkydeveloper]

/lgtm
/approve

Thanks @pierDipi for this backport!

[knative-prow-robot]

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