Jim's Blog
How to Import Virtual Machine Image into AWS
2016-06-03 06:47:30    136    0    0

Prepare Virtual Machine

  • Install OS on VMware or VirtualBox

  • Startup OS, delete the symbolic link of grubenv, then copy the real grubenv file here, like this:

  1. cd /boot/grub2/
  2. rm –f grubenv
  3. cp /boot/efi/EFI/centos/grubenv ./

Export VM and Upload into AWS

  • Shutdown OS, export image using OVA type.

  • Login AWS console, then upload this OVA image into S3 bucket, for example: vm-import

  • Create vmimport role

  1. aws iam create-role --role-name vmimport \
  2.     --assume-role-policy-document file://trust-policy.json

Here is the content of trust-policy.json

  1. {
  2.   "Version":"2012-10-17",
  3.    "Statement":[
  4.       {
  5.          "Sid":"",
  6.          "Effect":"Allow",
  7.          "Principal":{
  8.             "Service":"vmie.amazonaws.com"
  9.          },
  10.          "Action":"sts:AssumeRole",
  11.          "Condition":{
  12.             "StringEquals":{
  13.                "sts:ExternalId":"vmimport"
  14.             }
  15.          }
  16.       }
  17.    ]
  18. }
  • Edit policy for vmiport
  1. aws iam put-role-policy --
SMTP using net/mail with STARTTLS
golang    2016-05-28 15:19:05    98    0    0

1. Mail Configuration

When we have certificates for our SMTP servers, the TLSSkipVerify should be set to true. Otherwise, set to false

  1. // MailConfig contains all configuration for mail
  2. type MailConfig struct {
  3.     AuthMailAddr  string
  4.     AuthPassword  string
  5.     SendFrom      string
  6.     SMTPHost      string
  7.     TLSSkipVerify bool
  8. }
  10. var config MailConfig
  12. func SendMail(mailto string, subject string, body string) error {
  13.     // Code
  14. }

2. Set From and To

  1.     from := mail.Address{
  2.         Name:    "",
  3.         Address: config.SendFrom,
  4.     }
  5.     to := mail.Address{
  6.         Name:    "",
  7.         Address: mailto,
  8.     }

3. Setup Header and Message

  1.     // Setup headers
  2.     headers := make(map[string]string)
  3.     headers["From"] = from.String()
  4.     headers["To"] = to.String()
  5.     headers["Subject"] = subject
  7.     // Setup message
  8.     message := ""
  9.     for k, v := range headers {
  10.         message += fmt.Sprintf("%s: %s\r\n", k, v)
  11.     }
  12.     message += "