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I am getting nugget restore error while building using docker-compose behind proxy. I have set proxy in docker for windows. Nuget restore works for command line dotnet restore and visual studio debug, but not using docker-compose.

:\Program Files\dotnet\sdk\2.1.104\NuGet.targets(104,5): error : Unable to load the service index for source https://api.nuget.org/v3/index.json. [C:\src\WebApp.sln]
:\Program Files\dotnet\sdk\2.1.104\NuGet.targets(104,5): error :   An error occurred while sending the request. [C:\src\WebApp.sln]
:\Program Files\dotnet\sdk\2.1.104\NuGet.targets(104,5): error :   A connection with the server could not be established [C:\src\WebApp.sln]
ERROR: Service 'idenityapi' failed to build: The command 'powershell -Command $ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; dotnet restore -nowarn:msb3202,nu1503' r
turned a non-zero code: 1
prisar
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6 Answers6

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SOLVED:
It turns out to be a networking issue. I am behind a corporate firewall at work that leverages TLS packet inspection to break apart SSL traffic. The build process while debugging runs as "me" on my local machine, however, the release build (docker-compose) actually pulls down a aspnetcore-build docker image, copies your code to the docker container, then runs dotnet restore to get fresh nuget packages for your docker image. These actions can be found in the Docker File in your project. This "dotnet restore" inside the container, runs under a different security context, and therefore was getting hung up. We traced the network traffic which was hard for me to get to because of how docker networking works. Fiddler was not catching the traffic. Using wireshark, we were able to catch it from a device level and see the drop. The reason it continued to fail from my home network was due to the configuration with our hypervisor & networking.

RESOLUTIONS:
Add a firewall rule for https://api.nuget.org/v3/index.json (Preferred) OR Build the image from VSTS in the cloud OR Build from a different network.

PS4 please post back if you are able to resolve this the same way? Having spent 3 days on this, I'm curious about your status.

Wauna
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When I ran into this issue with dotnet restore adding the corporate cert file fixed the issue. (May or may not be the same in your case?). Before RUN dotnet restore I added to the container's certificate store i.e.

ADD your-proxy-certificate-file.crt /usr/local/share/ca-certificates/your-proxy-certificate-file.crt
RUN update-ca-certificates

In theory, if dotnet restore works on your local machine, there's no reason you shouldn't be able to configure your container to work (without firewall rules or changing network!). You essentially need to configure the container to work behind your proxy with the same setup as your local machine.

uosjead
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  • @uosjeadad ..Can you elaborate what is a Proxy Certificate and where it is found in the system? Please help me in adding the above lines .. – AJAY KUMAR Feb 18 '20 at 07:43
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You can check network adapter indexes. docker uses last in the list. if it's disconnected - you will not be able to restore packages as image is not able to get to the internet to download ones.

check network interface list:

❯ Get-NetIPInterface -AddressFamily IPv4 | Sort-Object -Property InterfaceMetric -Descending

Change index for LAN (ex. move it above Wi-Fi):

❯ Set-NetIPInterface -InterfaceAlias 'Local Area Connection* 1' -InterfaceMetric 100
wałdis iljuczonok
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I had similar problem when corporate SSL interception blocked nuget package restore. The error was slightly different though: "The remote certificate is invalid because of errors in the certificate chain: PartialChain"

The following solution helped me:

  1. Export Windows certificate that is used to connect to SSL proxy in PEM format;

  2. Add following lines to Dockerfile:

    COPY ["exported_windows_cert_path_and_name.cer", "/usr/local/share/ca-certificates/cert_name.cer"]

    RUN openssl x509 -inform PEM -in '/usr/local/share/ca-certificates/cert_name.cer' -out '/usr/local/share/ca-certificates/cert_name.crt'

    RUN update-ca-certificates

It can also be used DER certificate type instead of PEM.

Volodymyr Ivanov
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I too am getting this same error now. I've been working on it for 2 days to no avail. I've determined that it doesn't seem to be a network related issue. I can load the same project on my home laptop and it builds. I brought my work laptop home it doesn't build. That points me to my work laptop having something amis.

I had fiddler open, and it never tries to hit the URL. I'm running short on ideas at this point for what to do.

I tried creating another "template" project from a simple API/website... it builds fine... I add Nuget Packages and it suddenly fails.

My error message is exactly the same as PS4's.

Steps to reproduce this are easy. 1) Create a new .NET Core Web Project 2) Enable Docker support (either through new project wizard or Add context menu) 3) Select Release Mode 4) Hit Play/Debug/Go button.

One thing that PS4 and I both share is that both of us have "dotnet sdk 2.1.104"

Wauna
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  • I am suspicious of our Anti-Virus program catching something. I see in the Windows event logs that it catches something right before . – Wauna Apr 23 '18 at 13:50
  • So, what is actually happening here is docker-compose creates a short-lived container while building. If you do do "docker ps" you can see the container spool up and then try to reach out to restore packages from the Docker Container. The error message is actually saying that "from within the Docker Container, I cannot Restore". Still digging into why.... – Wauna Apr 23 '18 at 15:50
  • I tried using an updated BUILD Image.. that didn't seem to work either. - FROM microsoft/aspnetcore-build:2.0.7-2.1.105-nanoserver-sac2016 AS build I was hopeful that would resolve it, but it appears not to. I also attempted the 1.0-2.0 and that didn't work. Next stop it to try and get into the container while it's running and see why the build container cannot nuget restore – Wauna Apr 24 '18 at 15:17
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I tried to change my network connection as well...recreated all the images and containers but it did not work then I tried

--disable-parallel and it worked.

Note: I am using docker-compose command to run all of my microservices and I entered --disable-parallel in my Docker file right after dotnet restore command

Ahsam Aslam
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