I'm not sure if I have found a bug or if this is expected behavior. I
expected the matching public key for the private key I passed to be
generated and added to my instance automatically, since I saw no mention or
ways of providing the public key. But it looks like this is not the
behavior.
The situation is that when I specify 'ssh_private_key_file' in a gcp
builder like this:
{
"builders": [
{
"type": "googlecompute",
"project_id": "redacted",
"source_image": "ubuntu-1604-xenial-v20181204",
"image_name": "my-packer-image",
"disk_size": "50",
"machine_type": "n1-standard-2",
"communicator": "ssh",
"ssh_username": "packer_user",
"ssh_private_key_file": "./id_rsa.pem",
"network": "packer-network",
"zone": "us-west1-b",
"state_timeout" : "15m",
"instance_name" : "some-instance-name"
}
]
}
The build fails, after timing out trying to connect over ssh:
SSH handshake err: ssh: handshake failed: ssh: unable to authenticate,
attempted methods [none publickey], no supported methods remain
I can make it succeed by manually adding the public key on instance
metadata:
{
"builders": [
{
"type": "googlecompute",
"project_id": "redacted",
"source_image": "ubuntu-1604-xenial-v20181204",
"image_name": "my-packer-image",
"disk_size": "50",
"machine_type": "n1-standard-2",
"communicator": "ssh",
"ssh_username": "packer_user",
"ssh_private_key_file": "./id_rsa.pem",
"network": "packer-network",
"zone": "us-west1-b",
"state_timeout" : "15m",
"instance_name" : "some-instance-name",
"metadata" : {
"ssh-keys": "packer_user:ssh-rsa [ssh public key data] packer_user"
}
}
]
}
Is this expected?
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