How to do git checkout on Azure pipeline over HTTP/2? - azure

Question

I need to set git checkout on HTTP/2. However, I am unable to find any such option and Azure is exclusively setting the http.Version to HTTP/1.1 and this is blocking my checkout due to firewalls. Any help or workaround on how I can set http.Version to HTTP/2 is appreciated. Thank you.
Below is the snapshot of pipeline logs.
This is my pipeline yaml
pool:
name: "some pool"
trigger:
- some branch
stages:
- stage: main
jobs:
- job: synchronize
steps:
- checkout: self
clean: true
displayName: Git checkout
continueOnError: true
- task: Bash#3
inputs:
targetType: filePath
filePath: $(System.DefaultWorkingDirectory)/scripts/sync_git.sh
workingDirectory: $(System.DefaultWorkingDirectory)
I am running azp agents as container in Kubernetes.

Answer 1

You can't configure the http.version in the Checkout step. Microsoft force to use HTTP/1.1, you can see it in the Microsoft agent source code:
// Force Git to HTTP/1.1. Otherwise IIS will reject large pushes to Azure Repos due to the large content-length header
// This is caused by these header limits - https://learn.microsoft.com/en-us/iis/configuration/system.webserver/security/requestfiltering/requestlimits/headerlimits/
int exitCode_configHttp = await gitCommandManager.GitConfig(executionContext, targetPath, "http.version", "HTTP/1.1");
if (exitCode_configHttp != 0)
{
executionContext.Warning($"Forcing Git to HTTP/1.1 failed with exit code: {exitCode_configHttp}");
}
As workaround, you can disable the native checkout step with checkout: none and implement a custom checkout. just add a command line task and perform git commands:
git config http.version HTTP/2
git clone YOUR-REPO-URL