amazon-web-services - 等待 SSH : Packer experienced an authentication error when trying to connect via SSH 时出错

Question

我正在尝试使用加壳器构建 AWS AMI。这是我的打包机配置文件:

source "amazon-ebs" "base-alpine" {

  assume_role {
    role_arn     = "arn:aws:iam::${var.aws_account_id}:role/admin-ci"
    session_name = "packer"
  }

  source_ami_filter {
    filters = {
      virtualization-type = "hvm"
      name                = "alpine-3.15.0*"
      root-device-type    = "ebs"
    }
    owners      = ["538276064493"]
    most_recent = true
  }

  subnet_filter {
    filters = {
      "tag:Function" : "public"
      "tag:Project" : "brain"
    }
    most_free = true
  }

  security_group_filter {
    filters = {
      "tag:Function" : "public"
      "tag:Project" : "brain"
    }
  }

  ami_name                    = "base-alpine"
  instance_type               = "t4g.medium"
  region                      = "${var.aws_region}"
  ssh_username                = "alpine"
  associate_public_ip_address = true
  force_deregister            = true
  force_delete_snapshot       = true

  tags = {
    Project  = "brain"
    Name     = "base-alpine"
  }

}

build {
  sources = ["source.amazon-ebs.base-alpine"]

  provisioner "file" {
    source      = "hostname.sh"
    destination = "/tmp/hostname.sh"
  }

  provisioner "shell" {
    valid_exit_codes = [0, 1]
    inline = [
      "doas apk -U upgrade"
    ]

  }

}

我之前使用完全相同的配置，但使用不同的基础 AMI，并且工作正常。

现在，在我更改基本 AMI 后，我收到此错误:

==> amazon-ebs.base-alpine: Error waiting for SSH: Packer experienced an authentication error when trying to connect via SSH. This can happen if your username/password are wrong. You may want to double-check your credentials as part of your debugging process. original error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

有趣的是，我可以使用生成的 ssh 私钥 ssh 进入创建的 Packer 机器，没有任何问题。

知道为什么会这样吗？或者更好的调试建议？

Answer 1

我会把@Beevik 的评论放在这里

The openssh config that ships with the AWS alpine 3.15 cloud image does not appear to support RSA keys by default. I see the following error logged in /var/log/messages as the packer client tries to connect via ssh: "userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms". Downgrading to the alpine 3.14 cloud image worked for me.