Problem Deploying Autoscaler with v1.5.1 #1796

pluttrell · 2017-02-06T22:20:22Z

Using Kops v1.5.0-beta2, if I deploy the Cluster Autoscaler as described here on AWS, it appears to fail. Here's exactly what I ran:

CLOUD_PROVIDER=aws
IMAGE=gcr.io/google_containers/cluster-autoscaler:v0.4.0
MIN_NODES=3
MAX_NODES=24
AWS_REGION=us-east-1
GROUP_NAME="k8s-worker"
SSL_CERT_PATH="/etc/ssl/certs/ca-certificates.crt" # (/etc/ssl/certs for gce)

addon=cluster-autoscaler.yml
wget -O ${addon} https://raw.githubusercontent.com/kubernetes/kops/master/addons/cluster-autoscaler/v1.4.0.yaml

sed -i -e "s@{{CLOUD_PROVIDER}}@${CLOUD_PROVIDER}@g" "${addon}"
sed -i -e "s@{{IMAGE}}@${IMAGE}@g" "${addon}"
sed -i -e "s@{{MIN_NODES}}@${MIN_NODES}@g" "${addon}"
sed -i -e "s@{{MAX_NODES}}@${MAX_NODES}@g" "${addon}"
sed -i -e "s@{{GROUP_NAME}}@${GROUP_NAME}@g" "${addon}"
sed -i -e "s@{{AWS_REGION}}@${AWS_REGION}@g" "${addon}"
sed -i -e "s@{{SSL_CERT_PATH}}@${SSL_CERT_PATH}@g" "${addon}"

kubectl apply -f ${addon}

Here is the log from the pod itself:

2017-02-06T21:53:09.516651243Z I0206 21:53:09.516516       1 cluster_autoscaler.go:353] Cluster Autoscaler 0.4.0
2017-02-06T21:53:09.833039609Z E0206 21:53:09.832856       1 event.go:257] Could not construct reference to: '&api.Endpoints{TypeMeta:unversioned.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:api.ObjectMeta{Name:"cluster-autoscaler", GenerateName:"", Namespace:"kube-system", SelfLink:"", UID:"", ResourceVersion:"", Generation:0, CreationTimestamp:unversioned.Time{Time:time.Time{sec:0, nsec:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*unversioned.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]api.OwnerReference(nil), Finalizers:[]string(nil)}, Subsets:[]api.EndpointSubset(nil)}' due to: 'selfLink was empty, can't make reference'. Will not report event: 'Normal' '%v became leader' 'cluster-autoscaler-362589257-qvjps'
2017-02-06T21:53:09.833083521Z I0206 21:53:09.832940       1 leaderelection.go:215] sucessfully acquired lease kube-system/cluster-autoscaler
2017-02-06T21:55:10.236022480Z E0206 21:55:10.235891       1 aws_manager.go:81] Error while regenerating Asg cache: RequestError: send request failed
2017-02-06T21:55:10.236074713Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T21:57:10.654286671Z W0206 21:57:10.654164       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-04dab8e1abd2eeadf}, error: RequestError: send request failed
2017-02-06T21:57:10.654433665Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T21:59:20.945923291Z W0206 21:59:20.945820       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-07cb35848b7303a8c}, error: RequestError: send request failed
2017-02-06T21:59:20.945959787Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:01:31.312714356Z W0206 22:01:31.312578       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-045dfa57161b3f669}, error: RequestError: send request failed
2017-02-06T22:01:31.312762096Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:03:41.648172881Z W0206 22:03:41.648044       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-0922d3fd192fa3708}, error: RequestError: send request failed
2017-02-06T22:03:41.648207274Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:05:51.955455693Z W0206 22:05:51.955355       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-0922d3fd192fa3708}, error: RequestError: send request failed
2017-02-06T22:05:51.955490454Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:08:02.268974568Z W0206 22:08:02.268861       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-0922d3fd192fa3708}, error: RequestError: send request failed
2017-02-06T22:08:02.269019618Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: lookup autoscaling.us-east-1.amazonaws.com on 100.64.0.10:53: dial udp 100.64.0.10:53: i/o timeout
2017-02-06T22:10:12.709737594Z W0206 22:10:12.709623       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-07cb35848b7303a8c}, error: RequestError: send request failed
2017-02-06T22:10:12.709795552Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:12:22.947293286Z W0206 22:12:22.947191       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-04dab8e1abd2eeadf}, error: RequestError: send request failed
2017-02-06T22:12:22.947324194Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T22:14:33.216621196Z W0206 22:14:33.216505       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-07cb35848b7303a8c}, error: RequestError: send request failed
2017-02-06T22:14:33.216661881Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout

The text was updated successfully, but these errors were encountered:

pluttrell · 2017-02-06T22:21:02Z

@ese Do I have the config correct?

yissachar · 2017-02-06T22:45:49Z

@pluttrell Is the group name correct? I believe it has to be the name of your node ASG, which likely is not k8s-worker.

pluttrell · 2017-02-06T23:20:54Z

@yissachar Thanks for the suggestion. I deleted the old deployment and recreated it, but this time using the name of my Nodes ASG, as follows:

GROUP_NAME="nodes.${NAME}"

But still see the same problem:

2017-02-06T23:14:01.681430960Z I0206 23:14:01.681296       1 cluster_autoscaler.go:353] Cluster Autoscaler 0.4.0
2017-02-06T23:14:01.979278933Z I0206 23:14:01.979177       1 leaderelection.go:295] lock is held by cluster-autoscaler-362589257-en53e and has not yet expired
2017-02-06T23:14:05.432683960Z I0206 23:14:05.432589       1 leaderelection.go:295] lock is held by cluster-autoscaler-362589257-en53e and has not yet expired
2017-02-06T23:14:09.776690773Z I0206 23:14:09.776600       1 leaderelection.go:295] lock is held by cluster-autoscaler-362589257-en53e and has not yet expired
2017-02-06T23:14:13.373972813Z I0206 23:14:13.373852       1 leaderelection.go:295] lock is held by cluster-autoscaler-362589257-en53e and has not yet expired
2017-02-06T23:14:16.476140474Z I0206 23:14:16.476027       1 leaderelection.go:295] lock is held by cluster-autoscaler-362589257-en53e and has not yet expired
2017-02-06T23:14:19.620142570Z E0206 23:14:19.619954       1 event.go:257] Could not construct reference to: '&api.Endpoints{TypeMeta:unversioned.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:api.ObjectMeta{Name:"cluster-autoscaler", GenerateName:"", Namespace:"kube-system", SelfLink:"", UID:"", ResourceVersion:"", Generation:0, CreationTimestamp:unversioned.Time{Time:time.Time{sec:0, nsec:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*unversioned.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]api.OwnerReference(nil), Finalizers:[]string(nil)}, Subsets:[]api.EndpointSubset(nil)}' due to: 'selfLink was empty, can't make reference'. Will not report event: 'Normal' '%v became leader' 'cluster-autoscaler-3428038825-s49yu'
2017-02-06T23:14:19.620201936Z I0206 23:14:19.620108       1 leaderelection.go:215] sucessfully acquired lease kube-system/cluster-autoscaler
2017-02-06T23:16:20.435300340Z E0206 23:16:20.435030       1 aws_manager.go:81] Error while regenerating Asg cache: RequestError: send request failed
2017-02-06T23:16:20.435344746Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout
2017-02-06T23:18:20.772820200Z W0206 23:18:20.772702       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-06f447adf256f4e82}, error: RequestError: send request failed
2017-02-06T23:18:20.772863488Z caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout

ese · 2017-02-06T23:40:41Z

@pluttrell At a quick review it seems a problem with your dns

pluttrell · 2017-02-06T23:46:24Z

@ese I'm using Route53. I also have deployed the Dashboard addon, which is fully accessable at: https://api.${NAME}/ui. As is all of the kubectl commands.

dmcnaught · 2017-02-07T00:34:16Z

Was that a typo @pluttrell - GROUP_NAME="nodes.${NAME}" - you have $ after { in your comment.
It's working for me with 1.5.0-beta2

pluttrell · 2017-02-07T08:13:27Z

@dmcnaught Thanks for pointing out my typo in the comment above, which I used instead of redacting it. I just corrected it. What I tried earlier had the full ASG name, which I cut&pasted, so I'm sure it was correct.

ese · 2017-02-07T16:06:36Z

@pluttrell I can't reproduce it. Works fine for me with 1.5.1 kops release

pluttrell · 2017-02-07T23:02:49Z

After upgrading to 1.5.1, I worked on reproducing the problem and found that using the exact same steps to create 12 clusters, only 2 of them experienced this problem. The other 10 worked fine.

pluttrell · 2017-02-08T00:46:13Z

The problem might also come and go. Or not be triggered until there's a scaling event.

In a cluster that had previously not reported any errors, I intentional deployed an exorbitant number of replicas to trigger a scaling event, but it failed while trying to scale up.

I0208 00:37:08.293007       1 scale_down.go:163] No candidates for scale down
I0208 00:37:18.540502       1 scale_down.go:163] No candidates for scale down
I0208 00:37:28.882205       1 scale_down.go:163] No candidates for scale down
I0208 00:37:39.139642       1 scale_down.go:163] No candidates for scale down
I0208 00:37:49.430254       1 scale_down.go:163] No candidates for scale down
I0208 00:37:59.891498       1 scale_down.go:163] No candidates for scale down
W0208 00:40:10.266085       1 cluster_autoscaler.go:202] Cluster is not ready for autoscaling: Error while looking for ASG for instance {Name:i-091092f5959263783}, error: RequestError: send request failed
caused by: Post https://autoscaling.us-east-1.amazonaws.com/: dial tcp: i/o timeout

mark-grimes · 2017-03-09T10:29:01Z

Was this ever resolved? I have exactly the same problem. Oddly I get the same error if I put a nonsense name for the ASG and/or remove the IAM autoscaling permissions. Could someone confirm what error is displayed if these are incorrect (even though I'm confident they are correct)?

kubernetes v1.5.3 server and client
kops git-723f3bc (built from source from the release branch)

Also, I can confirm the Error while looking for ASG for instance error is only triggered on a scaling event.

mark-grimes · 2017-03-09T11:28:36Z

Finally figured it out. Following the template at https://github.com/kubernetes/contrib/blob/master/cluster-autoscaler/cloudprovider/aws/README.md#1-asg-setup-min-1-max-10-asg-name-k8s-worker-asg-1 works, but the template at https://github.com/kubernetes/kops/tree/master/addons/cluster-autoscaler doesn't.

Correcting for indentation, the diff is (working version is '<')

7c7
<     app: cluster-autoscaler
---
>     k8s-app: cluster-autoscaler
12c12
<       app: cluster-autoscaler
---
>       k8s-app: cluster-autoscaler
16c16,18
<         app: cluster-autoscaler
---
>         k8s-app: cluster-autoscaler
>       annotations:
>         scheduler.alpha.kubernetes.io/tolerations: '[{"key":"dedicated", "value":"master"}]'
19,20c21,22
<         - image: gcr.io/google_containers/cluster-autoscaler:v0.4.0
<           name: cluster-autoscaler
---
>         - name: cluster-autoscaler
>           image: gcr.io/google_containers/cluster-autoscaler:v0.4.0
30d31
<             - --v=4
32d32
<             - --skip-nodes-with-local-storage=false
41d40
<           imagePullPolicy: "Always"
45c44,46
<             path: "/etc/ssl/certs/ca-certificates.crt"
---
>             path: /etc/ssl/certs/ca-certificates.crt
>       nodeSelector:
>         kubernetes.io/role: master

Which of those is the crucial difference I don't know.

Tibingeo · 2017-06-28T17:17:16Z

I get this error in my autoscaler log

2017-06-28T17:15:18.034832321Z I0628 17:15:18.034555       1 leaderelection.go:204] succesfully renewed lease kube-system/cluster-autoscaler
2017-06-28T17:15:20.110544607Z I0628 17:15:20.110304       1 leaderelection.go:204] succesfully renewed lease kube-system/cluster-autoscaler
2017-06-28T17:15:22.116750413Z I0628 17:15:22.116519       1 leaderelection.go:204] succesfully renewed lease kube-system/cluster-autoscaler
2017-06-28T17:15:24.123511893Z I0628 17:15:24.123260       1 leaderelection.go:204] succesfully renewed lease kube-system/cluster-autoscaler
2017-06-28T17:15:26.210659327Z I0628 17:15:26.210364       1 leaderelection.go:204] succesfully renewed lease kube-system/cluster-autoscaler
2017-06-28T17:15:26.714239374Z E0628 17:15:26.713979       1 static_autoscaler.go:108] Failed to update node registry: RequestError: send request failed
2017-06-28T17:15:26.714267753Z caused by: Post https://autoscaling.ap-southeast-1a.amazonaws.com/: dial tcp: lookup autoscaling.ap-southeast-1a.amazonaws.com on 100.64.0.10:53: no such host

what does error mean ? It's trying to connect to some unknown host 100.64.0.10:53

7chenko · 2017-09-08T03:22:36Z

Getting a similar error, with kops 1.7.0, kubernetes 1.7.5, cluster-autoscaler 0.6.1, but only when trying to scale from 0 nodes. According to this, as of CA 0.6.1 I should be able to scale to/from 0. I'm getting errors like this:

E0908 03:18:13.511590       1 static_autoscaler.go:118] Failed to update node registry: RequestError: send request failed
caused by: Post https://autoscaling.us-west-2.amazonaws.com/: dial tcp: i/o timeout

Using a deployment similar to this one, and it works as long as there is at least 1 node up:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: cluster-autoscaler
  namespace: kube-system
  labels:
    app: cluster-autoscaler
spec:
  replicas: 1
  selector:
    matchLabels:
      app: cluster-autoscaler
  template:
    metadata:
      labels:
        app: cluster-autoscaler
    spec:
      containers:
        - image: gcr.io/google_containers/cluster-autoscaler:v0.6.1
          name: cluster-autoscaler
          resources:
            limits:
              cpu: 100m
              memory: 300Mi
            requests:
              cpu: 100m
              memory: 300Mi
          command:
            - ./cluster-autoscaler
            - --v=4
            - --stderrthreshold=info
            - --cloud-provider=aws
            - --skip-nodes-with-local-storage=false
            - --nodes=0:10:nodes.uswest2.metamoto.net
          env:
            - name: AWS_REGION
              value: us-west-2
          volumeMounts:
            - name: ssl-certs
              mountPath: /etc/ssl/certs/ca-certificates.crt
              readOnly: true
          imagePullPolicy: "Always"
      volumes:
        - name: ssl-certs
          hostPath:
            path: "/etc/ssl/certs/ca-certificates.crt"
      tolerations:
        - key: "node-role.kubernetes.io/master"
          effect: NoSchedule

7chenko · 2017-09-08T05:09:27Z

Figured this out, it was the fact that a kube-dns pod was not running on the master node. To run it, had to add the master toleration to the kube-dns deployment (same as with cluster-autoscaler deployment above). Once kube-dns was running on the master, autoscaler was able to use it to get ASG info from AWS and scale up from 0 nodes.

chrislovecnm · 2017-09-10T19:29:11Z

@andrewsykim we need kube-dns on the master? See above comment.

andrewsykim · 2017-09-10T21:33:53Z

Makes more sense to set dnsPolicy: Default for cluster-autoscaler as it shouldn't depend on kube-dns anyways.

andrewsykim · 2017-09-10T21:35:06Z

^ @7chenko any chance you can open a PR for this?

kyleu · 2017-09-10T23:27:51Z

I'm seeing the same thing. What's the advice, kube-dns on master or dnsPolicy? How do I accomplish either?

chrislovecnm · 2017-09-11T00:01:19Z

@kyleu we need the manifest for autoscaler to be changed. It should not be utilizing cluster dns. Also kube-dns should not probably live on the master.

andrewsykim · 2017-09-11T00:02:03Z

@kyleu example https://github.com/kubernetes/kops/blob/master/upup/models/cloudup/resources/addons/external-dns.addons.k8s.io/pre-k8s-1.6.yaml.template#L27

kyleu · 2017-09-11T00:38:16Z

Mine turned out to be specifying the AZ (us-east-1a), and not the region (us-east-1). The URL showed my error, but I overlooked it.

KernCheh · 2017-09-11T04:07:07Z

I faced the same issue and changed dnsPolicy from ClusterFirst to Default on cluster-autoscaler deployment as per @andrewsykim suggestion and it seemed to work. The cluster started to scale down

7chenko · 2017-09-11T18:04:16Z

I run kube-dns on the master because I also find that when it runs on the nodes it prevents scale-down (along with kube-dns-autoscaler pod). What's the right way to avoid that? I do have --skip-nodes-with-system-pods=false.

pluttrell · 2017-09-14T21:30:21Z

For 1.7.x clusters, should we set dnsPolicy: Default or not?

andrewsykim · 2017-09-16T02:09:35Z

From the start, cluster-autoscaler should run with dnsPolicy: Default. If someone can open a PR to address that, it would be great, otherwise, I will push a patch sometime next week when I have some bandwidth, thanks!

Automatic merge from submit-queue. . cluster-autoscaler should use dnsPolicy Default Fixes: #1796

lgg42 · 2020-03-16T14:35:36Z

Mine turned out to be specifying the AZ (us-east-1a), and not the region (us-east-1). The URL showed my error, but I overlooked it.

For anyone reading this issue take this into account, it also happened to me.

pluttrell changed the title ~~Problem Deploying Autoscaler with v1.5.0-beta2~~ Problem Deploying Autoscaler with v1.5.1 Feb 8, 2017

justinsb added the P1 label Feb 8, 2017

justinsb added this to the 1.5.2 milestone Feb 8, 2017

andrewsykim mentioned this issue Sep 16, 2017

cluster-autoscaler should use dnsPolicy Default #3394

Closed

andrewsykim mentioned this issue Sep 16, 2017

cluster-autoscaler should use dnsPolicy Default #3395

Merged

k8s-github-robot closed this as completed in #3395 Sep 19, 2017

k8s-github-robot pushed a commit that referenced this issue Sep 19, 2017

Merge pull request #3395 from andrewsykim/1796-fixed

ce4861e

Automatic merge from submit-queue. . cluster-autoscaler should use dnsPolicy Default Fixes: #1796

philipbjorge mentioned this issue Sep 20, 2017

[stable/cluster-autoscaler] Fix cluster autoscaler with default dns policy helm/charts#2296

Closed

gvonness mentioned this issue Jan 29, 2018

DNS issues with autoscaler on AWS #4347

Closed

mumoshu mentioned this issue May 1, 2018

cluster autoscaler --skip-nodes-with-system-pods=false ? kubernetes-retired/kube-aws#1253

Closed

so0k mentioned this issue Nov 6, 2018

[stable/cluster-autoscaler] support dnsPolicy helm/charts#9029

Merged

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Problem Deploying Autoscaler with v1.5.1 #1796

Problem Deploying Autoscaler with v1.5.1 #1796

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Problem Deploying Autoscaler with v1.5.1 #1796

Problem Deploying Autoscaler with v1.5.1 #1796

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