What could cause a Spring Cloud Dataflow app to be Running but not Ready on Kubernetes?

Question

I've set up a little Kubernetes cluster using Kubeadm and deployed the SCDF Kubernetes Server on it. When I connect using the Shell and deploy a stream, the apps become Running, but the Ready column shows 0/1 rather than 1/1. Kubernetes then continues to restart the apps.

kubectl get pods NAME READY STATUS RESTARTS AGE kafka-szv8s 1/1 Running 0 56m mysql-1wkls 1/1 Running 0 56m scdf-qw5ix 1/1 Running 0 56m ticktock-log-0-qqmf3 0/1 Running 4 20m ticktock-time-df069 0/1 Running 2 20m

Does SCDF define a ReadinessProbe that causes this behavior?

Any ideas on how to debug this?

Hi, Do you see any info from the logs of the apps? ex: `kubectl logs -f ticktock-log-0-qqmf3` — Ilayaperumal Gopinathan, Oct 24 '16 at 13:23
The problem with the logs is that the app keeps being restarted and the above command only gives the latest log. I've tried this a bunch of times, but no errors show up. — Remon Sinnema, Oct 25 '16 at 07:15

score 1 · Accepted Answer · answered Dec 12 '16 at 10:45

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This seems to be caused by the liveness/readyness probes not responding properly.

answered Dec 12 '16 at 10:45

Remon Sinnema

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What could cause a Spring Cloud Dataflow app to be Running but not Ready on Kubernetes?

1 Answers1