Fix wget ignoring env vars for no_proxy

[maxenium]

The cadvisor health check ends up sending requests to proxy instead of localhost.

No_proxy being configured correctly I was able to narrow down the issue to the wget version within the image. As this should never be sent anywhere else than localhost disabling proxy entirely for the health-check is a valid solution.

# docker exec -it cadvisor /bin/sh
/ # wget --help
BusyBox v1.36.1 (2023-11-06 11:32:24 UTC) multi-call binary.
/ # wget --quiet --tries=1 --spider $CADVISOR_HEALTHCHECK_URL
wget: server returned error: HTTP/1.1 403 Forbidden
/ # wget --quiet --tries=1 -Y off --spider $CADVISOR_HEALTHCHECK_URL

[k8s-ci-robot]

Hi @maxenium. Thanks for your PR.

I'm waiting for a google member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[maxenium]

/ok-to-test
@iwankgb can you please add the label?

[k8s-ci-robot]

@maxenium: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/ok-to-test
@iwankgb can you please add the label?

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[maxenium]

Hi @bobbypage @iwankgb @Creatone @dims @mrunalp,
anyone willing to help me getting this pullrequest to tested and merged?

We are currently getting 60.000req/h against zscaler from only ~500 hosts. Network-guys are not amused 😭.
Thanks!

[iwankgb]

I can't see -Y option in GNU wget manual.

[iwankgb]

It seems to be available in Busybox's wget, but Alpine uses GNU version, as far as I know.