Failed to read manifest- "Exception (Wait for Manifest to Stabilize. Unexpected Task Failure)"

Issue

When trying to deployer clusters to Kubernetes in versions older than 1.16, the following errors can appear in the Clouddriver logs: 2021-05-04 21:17:16.032 WARN 1 --- [0.0-7002-exec-9] c.n.s.c.k.c.ManifestController : Failed to read manifest

com.netflix.spinnaker.clouddriver.kubernetes.op.handler.UnsupportedVersionException: No replicaSet is supported at api version extensions/v1beta1 at com.netflix.spinnaker.clouddriver.kubernetes.op.handler.KubernetesReplicaSetHandler.status(KubernetesReplicaSetHandler.java:98) ~[clouddriver-kubernetes.jar:na]

2021-05-05 14:29:09.653 WARN 1 --- [utionAction-538] c.n.s.c.k.c.a.KubernetesCachingAgent : kubernetes/KubernetesCoreCachingAgent[1/1]: Failure adding relationships for service

com.netflix.spinnaker.clouddriver.kubernetes.op.handler.UnsupportedVersionException: No replicaSet is supported at api version extensions/v1beta1 at com.netflix.spinnaker.clouddriver.kubernetes.op.handler.KubernetesReplicaSetHandler.getPodTemplateLabels(KubernetesReplicaSetHandler.java:167) The UI shows the following: "Exception (Wait for Manifest to Stabilize. Unexpected Task Failure)"

Cause

Kubernetes deployment targets prior to version 1.16 are not supported in v2.26.x, as per the following:https://docs.armory.io/docs/release-notes/rn-armory-spinnaker/armoryspinnaker_v2-26-2/