通过deployment创建pod失败
在k8s集群中，deployment启动后没有成功创建pod，通过“kubectl describe deployment ${DEPLOY_NAME} ”，看到如下日志，只看到“ReplicaFailure True FailedCreate”，但是没有failed的原因。
kubectl describe deployment ${DEPLOY_NAME}
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Conditions:Type Status Reason---- ------ ------Progressing True NewReplicaSetCreatedAvailable False MinimumReplicasUnavailableReplicaFailure True FailedCreate
OldReplicaSets: <none>
NewReplicaSet: james-mtfnwnbu4z7v5umk-67cc5d6b98 (0/1 replicas created)
Events:Type Reason Age From Message---- ------ ---- ---- -------Normal ScalingReplicaSet 40s deployment-controller Scaled up replica set james-mtfnwnbu4z7v5umk-67cc5d6b98 to 1
其实原因藏在edit deployment里面。可以通过"edit deployment"来查看，错误原因一般在最后几行。
kubectl edit deployment ${DEPLOY_NAME}
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'pods "james-mtfnwnbu4z7v5umk-67cc5d6b98" is forbidden: error looking up service account ns-james/davis: serviceaccount "davis" not found'
)
