70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package common
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import (
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"code.google.com/p/go.crypto/ssh"
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"errors"
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"fmt"
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"github.com/mitchellh/goamz/ec2"
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"github.com/mitchellh/multistep"
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"time"
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)
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// SSHAddress returns a function that can be given to the SSH communicator
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// for determining the SSH address based on the instance DNS name.
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func SSHAddress(e *ec2.EC2, port int) func(multistep.StateBag) (string, error) {
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return func(state multistep.StateBag) (string, error) {
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for j := 0; j < 2; j++ {
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var host string
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i := state.Get("instance").(*ec2.Instance)
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if i.DNSName != "" {
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host = i.DNSName
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} else if i.VpcId != "" {
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if i.PublicIpAddress != "" {
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host = i.PublicIpAddress
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} else {
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host = i.PrivateIpAddress
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}
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}
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if host != "" {
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return fmt.Sprintf("%s:%d", host, port), nil
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}
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r, err := e.Instances([]string{i.InstanceId}, ec2.NewFilter())
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if err != nil {
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return "", err
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}
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if len(r.Reservations) == 0 || len(r.Reservations[0].Instances) == 0 {
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return "", fmt.Errorf("instance not found: %s", i.InstanceId)
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}
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state.Put("instance", &r.Reservations[0].Instances[0])
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time.Sleep(1 * time.Second)
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}
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return "", errors.New("couldn't determine IP address for instance")
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}
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}
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// SSHConfig returns a function that can be used for the SSH communicator
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// config for connecting to the instance created over SSH using the generated
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// private key.
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func SSHConfig(username string) func(multistep.StateBag) (*ssh.ClientConfig, error) {
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return func(state multistep.StateBag) (*ssh.ClientConfig, error) {
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privateKey := state.Get("privateKey").(string)
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signer, err := ssh.ParsePrivateKey([]byte(privateKey))
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if err != nil {
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return nil, fmt.Errorf("Error setting up SSH config: %s", err)
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}
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return &ssh.ClientConfig{
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User: username,
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Auth: []ssh.AuthMethod{
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ssh.PublicKeys(signer),
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},
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}, nil
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}
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}
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