Migrate image from alpine to ubuntu light

[piosz]

No description provided.

[bprashanth]

if this is for the dns issue I believe it's fixed in later versions of alpine (>=3.4 from memory)

[piosz]

Thanks @bprashanth for the info. Anyway since we have our own trusted image it'd be better to use it.

[clhodapp]

See rancher/rancher#4451 (comment)

[clhodapp]

The test I performed at the end of rancher/rancher#4451 (comment) presents pretty direct evidence that there is still an issue with DNS in Alpine.

[piosz]

Thanks for the info. I'm prioritizing this issue.

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[DirectXMan12]

@piosz what's the status of this

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