ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

[sahgilbert]

I have an Asp.Net Core (.Net 8.0) app, straight out of the box from Visual Studio for Mac.

I'm using a MacBook Pro (Silicon chip).

I have generated an SSH RSA key pair on my local mac machine.

I have created an Azure Virtual Machine running Linux.

When I created the Virtual Machine in the Azure Portal, I uploaded my public key which was generated by my previous step.

I have added the 3 required secrets to the source code repository on GitHub, based on the secrets variables in the deploy.yml file, as per the below screenshot:

I'm getting the following error when trying to deploy Asp.Net Core to an Azure Virtual Machine using GitHub Actions & appleboy/ssh-action:

ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

I have created a deploy.yml file for the deployment via GitHub Actions, with the following contents

`name: Deploy to Azure VM

on:
push:
branches:
- main

jobs:
deploy:
runs-on: ubuntu-latest

  steps:
    - name: Checkout Repository
      uses: actions/checkout@v2

    - name: Setup .NET Core
      uses: actions/setup-dotnet@v1
      with:
        dotnet-version: '8.x'

    - name: Build and Publish
      run: dotnet publish -c Release -o publish

    - name: Deploy to Azure VM
      uses: appleboy/ssh-action@master
      with:
        host: ${{ secrets.AZURE_VM_HOST }} # Azure VM IP address or hostname
        username: ${{ secrets.AZURE_VM_USERNAME }}
        key: ${{ secrets.AZURE_VM_SSH_PRIVATE_KEY }}
        script: |
          whoami
          cd /home/runner/work/
          git pull origin main
          sudo systemctl restart nameofmyvirtualmachineinmicrosoftazuregoeshere

`
How do I debug this error? Are there some debug settings that I can add to my deploy.yml file?

Thanks

[Sven65]

Also experiencing this issue. I've set the debug input to true, yet it appears that no debug information is output.

[LucasRoquilly]

I have exact same problem. I followed every instruction in documentation but still same error :
ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

However it works using this Github Action :
https://github.com/marketplace/actions/copy-via-ssh

[sahgilbert]

I have exact same problem. I followed every instruction in documentation but still same error : ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

However it works using this Github Action : https://github.com/marketplace/actions/copy-via-ssh

Do you have a full working example of a workflow.yml file, for this implementation, that you could share? That would be greatly appreciated, thank you.

[real-F-00]

i'm getting the same thing here, after days of going crazy i couldn't figure out what i did wrong, and apparently i'm not the only one facing this issue, i should mention that i'm running a hardened SSH server on Debian 12 using the configuration provided by ssh-audit.com simply trying to follow this guide i found on Youtube and using a separate user as opposed to the root user.

[appleboy]

@real-F-00 Have you solved the problem?

[LucasRoquilly]

I fixed my problem and ssh-action is now working. I feel stupid, I was using SSH_USERNAME in my yml file but the secret was called SSH_USER in GitHub Secrets 😑

Here is my working yml file for anyone it might help :

name: Deploy to VPS

on:
  push:
    branches:
      - main  # Adjust this to your main branch name
  workflow_dispatch: 
  
jobs:
  deploy:
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v2

    - name: Copy files to VPS
      uses: appleboy/scp-action@master
      with:
        host: ${{ secrets.SSH_HOST }}
        username: ${{ secrets.SSH_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        port: ${{ secrets.SSH_PORT }}  # If your SSH server uses a different port, add this line
        source: "public_html"  # Adjust this to the directory or files you want to copy
        target: "/var/www/domain.com/"  # Adjust this to the destination directory on your VPS
    - name: multiple command
      uses: appleboy/ssh-action@v1.0.3
      with:
        host: ${{ secrets.SSH_HOST }}
        username: ${{ secrets.SSH_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        port: ${{ secrets.SSH_PORT }}
        script: |
          chown -R openvc:www-data /var/www/domain.com/public_html
          chmod -R 770 /var/www/domain.com/public_html`

[sahgilbert]

I fixed my problem and ssh-action is now working. I feel stupid, I was using SSH_USERNAME in my yml file but the secret was called SSH_USER in GitHub Secrets 😑

Here is my working yml file for anyone it might help :

name: Deploy to VPS

on:
  push:
    branches:
      - main  # Adjust this to your main branch name
  workflow_dispatch: 
  
jobs:
  deploy:
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v2

    - name: Copy files to VPS
      uses: appleboy/scp-action@master
      with:
        host: ${{ secrets.SSH_HOST }}
        username: ${{ secrets.SSH_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        port: ${{ secrets.SSH_PORT }}  # If your SSH server uses a different port, add this line
        source: "public_html"  # Adjust this to the directory or files you want to copy
        target: "/var/www/domain.com/"  # Adjust this to the destination directory on your VPS
    - name: multiple command
      uses: appleboy/ssh-action@v1.0.3
      with:
        host: ${{ secrets.SSH_HOST }}
        username: ${{ secrets.SSH_USER }}
        key: ${{ secrets.SSH_PRIVATE_KEY }}
        port: ${{ secrets.SSH_PORT }}
        script: |
          chown -R openvc:www-data /var/www/domain.com/public_html
          chmod -R 770 /var/www/domain.com/public_html`

Does this deploy to Microsoft Azure? Or are you using a different Cloud Provider? Thanks

[real-F-00]

@real-F-00 Have you solved the problem?

Yes! after days of headaches i finally solved the issue, i think this should be added to the documentation (if it isn't already) but the problem was that the user i was trying to use was locked, to keep the user locked but allowing ssh access to it i used usermod -p '*' user that solved my issue.

[LucasRoquilly]

Does this deploy to Microsoft Azure? Or are you using a different Cloud Provider? Thanks

@sahgilbert This was made for deployment to a OVHCloud VPS (Virtual Private Server) but I believe it should work for any Linux machine

[appleboy]

@LucasRoquilly Can you provide the ssh username and password through email (appleboy.tw AT gmail.com). Maybe I can try it and get you back soon?

Thanks.

[appleboy]

@LucasRoquilly

I will try out OVHCloud and promptly inform you if the product becomes available.

[appleboy]

Sorry, I misunderstood @LucasRoquilly. The issue lies with @sahgilbert problem on Azure. I will find time to test the issue on Azure again.