Presubmit tests are broken since we rely on pulling node.js image that was removed

[Ark-kun]

node:9.4.0-alpine no longer exists. Unfortunately we're still pulling it every time instead of relying on a static base image.

build-frontend-image:	Step 12/20 : FROM node:9.4.0-alpine
build-frontend-image:	9.4.0-alpine: Pulling from library/node
build-frontend-image:	error parsing HTTP 404 response body: invalid character 'p' after top-level value: "404 page not found\n"

[Ark-kun]

Node 9 was dropped in June:
https://github.com/nodejs/Release/blob/bc9d936e153b9fafd7f7c203f139d02035ca6862/schedule.json#L44
nodejs/docker-node#803

The schedule was announced couple of years ago: nodejs/Release@a058d35#diff-c5a445b5d198a13d8c4b4a82af5f2929R44

We might want to us LTS releases that have longer support.

[yebrahim]

Thanks for bringing this up, yes we need the upgrade.
I don't see this blocking tests anywhere though, and pulling node:9.4.0-alpine still works. Where did you see presubmit tests failing with this error?

[Ark-kun]

Where did you see presubmit tests failing with this error?

https://gubernator.k8s.io/build/kubernetes-jenkins/pr-logs/pull/kubeflow_pipelines/315/build-image/573/ and multiple other tests runs. Looks like that might have been a DockerHub or proxy issue that lasted some hours.

pulling node:9.4.0-alpine still works

Hmm. Strange.
I do not see any 9 in https://hub.docker.com/r/library/node/ or https://hub.docker.com/r/library/node/tags/

[yebrahim]

It's likely it'll be kept around for a while to avoid breaking active projects (I can still pull node 7 alpine too), but we should update the dependency to lts.

[yebrahim]

Can we rename this issue to track this update, since we're not really breaking presubmits?

[Ark-kun]

Looks like the issue was caused by temporary DockerHub problems when it started returning 4040 errors for many images.