packer-cn/builder/googlecompute/ssh.go

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package googlecompute
import (
"fmt"
"github.com/mitchellh/multistep"
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"golang.org/x/crypto/ssh"
)
func commHost(state multistep.StateBag) (string, error) {
ipAddress := state.Get("instance_ip").(string)
return ipAddress, nil
}
// sshConfig returns the ssh configuration.
func sshConfig(state multistep.StateBag) (*ssh.ClientConfig, error) {
config := state.Get("config").(*Config)
privateKey := state.Get("ssh_private_key").(string)
signer, err := ssh.ParsePrivateKey([]byte(privateKey))
if err != nil {
return nil, fmt.Errorf("Error setting up SSH config: %s", err)
}
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return &ssh.ClientConfig{
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User: config.Comm.SSHUsername,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
}, nil
}