packer-cn/builder/openstack/ssh.go

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package openstack
import (
"code.google.com/p/go.crypto/ssh"
"errors"
"fmt"
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"github.com/mitchellh/multistep"
"github.com/rackspace/gophercloud"
"time"
)
// SSHAddress returns a function that can be given to the SSH communicator
// for determining the SSH address based on the server AccessIPv4 setting..
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func SSHAddress(csp gophercloud.CloudServersProvider, port int) func(multistep.StateBag) (string, error) {
return func(state multistep.StateBag) (string, error) {
for j := 0; j < 2; j++ {
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s := state.Get("server").(*gophercloud.Server)
if s.AccessIPv4 != "" {
return fmt.Sprintf("%s:%d", s.AccessIPv4, port), nil
}
if s.AccessIPv6 != "" {
return fmt.Sprintf("[%s]:%d", s.AccessIPv6, port), nil
}
serverState, err := csp.ServerById(s.Id)
if err != nil {
return "", err
}
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state.Put("server", serverState)
time.Sleep(1 * time.Second)
}
return "", errors.New("couldn't determine IP address for server")
}
}
// SSHConfig returns a function that can be used for the SSH communicator
// config for connecting to the instance created over SSH using the generated
// private key.
func SSHConfig(username string) func(multistep.StateBag) (*ssh.ClientConfig, error) {
return func(state multistep.StateBag) (*ssh.ClientConfig, error) {
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privateKey := state.Get("privateKey").(string)
signer, err := ssh.ParsePrivateKey([]byte(privateKey))
if err != nil {
return nil, fmt.Errorf("Error setting up SSH config: %s", err)
}
return &ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
}, nil
}
}