docker-buildx/docs/advanced/auth.md

Authentication support

SSH authentication

To be able to connect to an SSH endpoint using the docker-container driver, you have to set up the SSH private key and configuration on the GitHub Runner:

name: ci

on:
  push:

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      -
        name: Set up SSH
        uses: MrSquaare/ssh-setup-action@523473d91581ccbf89565e12b40faba93f2708bd # v1.1.0
        with:
          host: graviton2
          private-key: ${{ secrets.SSH_PRIVATE_KEY }}
          private-key-name: aws_graviton2
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
        with:
          endpoint: ssh://me@graviton2

TLS authentication

You can also set up a remote BuildKit instance using the remote driver. To ease the integration in your workflow, we put in place environment variables that will set up authentication using the BuildKit client certificates for the tcp:// endpoint where <idx> is the position of the node in the list of nodes:

• BUILDER_NODE_<idx>_AUTH_TLS_CACERT
• BUILDER_NODE_<idx>_AUTH_TLS_CERT
• BUILDER_NODE_<idx>_AUTH_TLS_KEY

name: ci

on:
  push:

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
        with:
          driver: remote
          endpoint: tcp://graviton2:1234
        env:
          BUILDER_NODE_0_AUTH_TLS_CACERT: ${{ secrets.GRAVITON2_CA }}
          BUILDER_NODE_0_AUTH_TLS_CERT: ${{ secrets.GRAVITON2_CERT }}
          BUILDER_NODE_0_AUTH_TLS_KEY: ${{ secrets.GRAVITON2_KEY }}