Script unable to find installed curl / wget on Alpine

[kaashyapan]

bash-5.1# chmod +x dotnet-install.sh
bash-5.1# ./dotnet-install.sh -c Current --os linux-musl
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

dotnet_install: Error: curl (recommended) or wget are required to download dotnet. Install missing prerequisite to proceed.
bash-5.1# which curl
/usr/bin/curl
bash-5.1# which wget
/usr/bin/wget
bash-5.1# cat /etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.14.0
PRETTY_NAME="Alpine Linux v3.14"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://bugs.alpinelinux.org/"
bash-5.1# 

[strainovic]

Same issue here. It fails randomly.

--2021-08-30 13:53:06--  https://dot.net/v1/dotnet-install.sh
Resolving dot.net (dot.net)... 40.76.4.15, 40.112.72.205, 104.215.148.63, ...
Connecting to dot.net (dot.net)|40.76.4.15|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh [following]
--2021-08-30 13:53:07--  https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh
Resolving dotnet.microsoft.com (dotnet.microsoft.com)... 13.107.213.60, 13.107.246.60, 2620:1ec:46::60, ...
Connecting to dotnet.microsoft.com (dotnet.microsoft.com)|13.107.213.60|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 54538 (53K) [application/x-sh]
Saving to: 'dotnet-install.sh'

     0K .......... .......... .......... .......... .......... 93% 4.80M 0s
    50K ...                                                   100% 6.07T=0.01s

2021-08-30 13:53:07 (5.11 MB/s) - 'dotnet-install.sh' saved [54538/54538]

Removing intermediate container e38f994e5018
 ---> 2e4e611acfdb
Step 6/11 : RUN ./dotnet-install.sh -c 3.1 -i ${DOTNET_ROOT} --runtime aspnetcore &&     rm -rf dotnet-install.sh
 ---> Running in 69f496cb22ae
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

dotnet_install: Error: curl (recommended) or wget are required to download dotnet. Install missing prerequisite to proceed.

[bekir-ozturk]

Hi @kaashyapan & @strainovic,
Thanks for the issue.

@kaashyapan Are you seeing this randomly as well, or is it consistent?
@strainovic Are you also on Alpine?

I suspect that the issue is not related to curl or wget, but somehow this message is printed.
Could you use verbose switch ( -v ) and share the detailed logs?

Thank you very much.

[strainovic]

Hi @bekir-ozturk,

Yes, it is Alpine also.

During my last try, I got only one successful build, out of 5 tries. I Will try with ( -v ) also.

--verbose argument, not -v

Thanks

[kaashyapan]

I get it consistently though.
Below is the verbose output.

bash-5.1# chmod +x dotnet-install.sh
bash-5.1# ./dotnet-install.sh -c Current --os linux-musl --verbose
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

dotnet-install: Calling: machine_has curl
dotnet-install: Calling: machine_has wget
dotnet_install: Error: curl (recommended) or wget are required to download dotnet. Install missing prerequisite to proceed.
bash-5.1#

[strainovic]

Here is my verbose output too:

--2021-08-31 06:51:10--  https://dot.net/v1/dotnet-install.sh
Resolving dot.net (dot.net)... 40.76.4.15, 40.112.72.205, 104.215.148.63, ...
Connecting to dot.net (dot.net)|40.76.4.15|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh [following]
--2021-08-31 06:51:10--  https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh
Resolving dotnet.microsoft.com (dotnet.microsoft.com)... 13.107.246.60, 13.107.213.60, 2620:1ec:bdf::60, ...
Connecting to dotnet.microsoft.com (dotnet.microsoft.com)|13.107.246.60|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 54538 (53K) [application/x-sh]
Saving to: 'dotnet-install.sh'

     0K .......... .......... .......... .......... .......... 93% 4.34M 0s
    50K ...                                                   100% 6.07T=0.01s

2021-08-31 06:51:11 (4.62 MB/s) - 'dotnet-install.sh' saved [54538/54538]

Removing intermediate container a72e31416416
 ---> 61704e47758c
Step 6/11 : RUN ./dotnet-install.sh -c 3.1 -i ${DOTNET_ROOT} --runtime aspnetcore --verbose &&     rm -rf dotnet-install.sh
 ---> Running in 0c80af29613c
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

dotnet-install: Calling: machine_has curl
dotnet-install: Calling: machine_has wget
dotnet_install: Error: curl (recommended) or wget are required to download dotnet. Install missing prerequisite to proceed.
The command '/bin/sh -c ./dotnet-install.sh -c 3.1 -i ${DOTNET_ROOT} --runtime aspnetcore --verbose &&     rm -rf dotnet-install.sh' returned a non-zero code: 1

[danmoseley]

Installing on Alpine 3.13.4 I get this (after first failing due to not having bash, and installing bash)

danmose3:~/git# /root/git/performance/tools/dotnet/x64/dotnet-install.sh -InstallDir /root/git/performance/tools/dotnet/x64 -Architecture x64 -Channel 6.0
dotnet-install: Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:
dotnet-install: - The SDK needs to be installed without user interaction and without admin rights.
dotnet-install: - The SDK installation doesn't need to persist across multiple CI runs.
dotnet-install: To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.

wget: unrecognized option: waitretry
BusyBox v1.32.1 () multi-call binary.

On this Alpine (the one from the Windows Store for WSL2) there is no curl out of the box, and wget offered by BusyBox does not support a flag that dotnet-install.sh is trying to use.

Installing curl fixes this.

Can you avoid the waitretry flag and any others that don't work on Alpine? Or if that's not possible, as second best, detect this problem and recommend that the user install curl (apk add curl)

As it is this just won't install on a fresh Alpine.

[bekir-ozturk]

Thanks @danmoseley.
I'm working on something to detect the unsupported flags. I will link the PR to this issue once ready.

[sammym1982]

@bekir-ozturk we are still seeing the original issue in our CI builds on AzureDevOps. We do install curl as part of it but somehow the script fails the prereq check. This was working fine till afternoon 9/14 pst .

apk add curl && curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin -c Current && /root/.dotnet/dotnet tool install -g dotnet-dump && /root/.dotnet/dotnet tool install -g dotnet-gcdump && /root/.dotnet/dotnet tool install -g dotnet-trace && /root/.dotnet/dotnet tool install -g dotnet-counters && /root/.dotnet/dotnet tool install -g dotnet-stack

[bekir-ozturk]

Hi @sammym1982,
The fix is still waiting to be deployed to dot.net website. Please track here: https://github.com/dotnet/website/pull/3225
I will update this thread once it goes through.