"runtime-libraries enterprise-linux" jobs failing due to network issue

[filipnavara]

https://dev.azure.com/dnceng/public/_build/results?buildId=1622757&view=logs&j=12f1170f-54f2-53f3-20dd-22fc7dff55f9&t=356bb04c-cb4a-5f04-82ca-d3b102917eba&l=20

__DistroRid: linux-x64
Downloading 'https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh'
curl: (6) Couldn't resolve host 'dotnet.microsoft.com'
Curl failed; dumping some information about dotnet.microsoft.com for later investigation
140132104868288:error:2008F002:BIO routines:BIO_lookup_ex:system lib:../crypto/bio/b_addr.c:704:Temporary failure in name resolution
connect:errno=11

Happened at least three times on the same PR.

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Issue Details

---

https://dev.azure.com/dnceng/public/_build/results?buildId=1622757&view=logs&j=12f1170f-54f2-53f3-20dd-22fc7dff55f9&t=356bb04c-cb4a-5f04-82ca-d3b102917eba&l=20

__DistroRid: linux-x64
Downloading 'https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh'
curl: (6) Couldn't resolve host 'dotnet.microsoft.com'
Curl failed; dumping some information about dotnet.microsoft.com for later investigation
140132104868288:error:2008F002:BIO routines:BIO_lookup_ex:system lib:../crypto/bio/b_addr.c:704:Temporary failure in name resolution
connect:errno=11

Happened at least three times on the same PR.

Author:	filipnavara
Assignees:	-
Labels:	test-run-core, area-Infrastructure, untriaged
Milestone:	-

[ericstj]

I queued a couple builds to help us understand what's going on.
release/6.0-tip: https://dev.azure.com/dnceng/public/_build/results?buildId=1659265&view=results
release/6.0 prior to the change that first saw this failure: https://dev.azure.com/dnceng/public/_build/results?buildId=1659273&view=results

[danmoseley]

Note that we already pass --retry 10 to curl, it's retrying for 20 minutes:

2022-02-10T19:05:00.6681239Z Downloading 'https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh'
2022-02-10T19:25:44.2288504Z curl: (6) Couldn't resolve host 'dotnet.microsoft.com'
2022-02-10T19:25:44.2301300Z Curl failed; dumping some information about dotnet.microsoft.com for later investigation
2022-02-10T19:26:04.2567597Z 139683025289664:error:2008F002:BIO routines:BIO_lookup_ex:system lib:../crypto/bio/b_addr.c:704:Temporary failure in name resolution

[ericstj]

Looks like this issue is already being discussed here https://github.com/dotnet/core-eng/issues/15594 and @wfurt made a workaround for it in main.

[agocke]

Closing as dup of https://github.com/dotnet/core-eng/issues/15594