Amazon AMI CROSS Regions solution (AMI跨區域移轉)－紐士比的系統管理筆記

為什麼要弄這篇文章其實主要就是因為我們的AMI有移轉的需求
要從新加坡移轉到美東去以準備未來上線使用
其實接觸Amazon到現在我們都知道一件很重要的事
就是region間並沒有任何共享資源可以用
所以當我們在新加坡建的ami 在美東是沒辦法看到的

因此當我想要準備把環境從新加坡搬到美東去我就得找出對應的方式

1.花錢買第三方管理工具
2.重建環境
3.用dd建一個EBS的備份再轉過去

想了我就累
後來大概花了一個小時在找解法
總算讓我找到個工具
migrate-ebs-image.pl (只支援ebs base的unix系統)
http://search.cpan.org/~lds/VM-EC2/bin/migrate-ebs-image.pl

這個工具運作的方式大概是這樣
在來源region與目標region各開一台EC2 instance
來源region 會把ami檔的EBS 掛起來再rsync到目標區
完成之後就快照再註冊成ami

資源:
需要能運作perl的主機
我是自己原本就有台CENTOS的vm可以來處理

安裝:
1.需先安裝perl的環境
yum install perl*
2.perl -MCPAN -e 'install VM::EC2' #安裝VM::EC2
中間可能會遇到問題
(1)ExtUtils::MakeMaker version 6.31 required--this is only version 6.30 at Makefile.PL line 7.
root@localhost build]# cpan ExtUtils::MakeMaker #升級xtUtils::MakeMaker
(2) 找不到/root/.cpan/build/VM-EC2-1.19
root@localhost build]#mkdir /root/.cpan/build/VM-EC2-1.19   #手動建VM-EC2-1.19
(3)OSTYPE.pm 找不到
安裝epel來源
rpm -ivh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm #以5為例
#http://dl.fedoraproject.org/pub/epel/6/ 6的來源
vi /etc/yum.repos.d/epel.repo
[epel] [epel-debuginfo] [epel-source] 的enabled=0 都改為1
yum install perl-Perl-OSType
3.安裝過程會提示要輸入: EC2_ACCESS_KEY, EC2_SECRET_KEY
我後來是直接enter略過了(因為一直出錯)
然後他就會開始安裝
Installing /usr/share/man/man3/VM::EC2::BlockDevice.3pm
Installing /usr/share/man/man3/VM::EC2::Instance::StatusItem.3pm
Installing /usr/share/man/man3/VM::EC2::Instance::State.3pm
Installing /usr/share/man/man3/VM::EC2::Instance::IamProfile.3pm
Installing /usr/share/man/man3/VM::EC2::VPC::VpnGateway.3pm
Installing /usr/share/man/man3/VM::EC2::ELB::Policies::LBCookieStickinessPolicy.3pm
Installing /usr/bin/sync_to_snapshot.pl
Installing /usr/bin/migrate-ebs-image.pl
/usr/bin/make install -- OK
這樣就安裝成功
4.vi /usr/bin/migrate-ebs-image.pl
接著在131跟132增加下面兩行手動輸入EC2_ACCESS_KEY, EC2_SECRET_KEY
131 $Access_key ="XXXXXXXXXXXXXXXX";
132 $Secret_key ="XXXXXXXXXXXXXXXX";
5.移轉ami指令
migrate-ebs-image.pl --from "來源region" --to "目標region" "AMIid"
例如我從新加坡搬到美東
migrate-ebs-image.pl --from ap-southeast-1 --to us-east-1 ami-88gsygyg
6.接下來就會開始自動進行跟進度說明
[info] Scanning for existing staging servers and volumes in http://ec2.ap-southeast-1.amazonaws.com.
[info] Scanning for existing staging servers and volumes in http://ec2.us-east-1.amazonaws.com.
[info]    Gathering information about image ami-88fbbbda.
[info]    Copying EBS volumes attached to this image (this may take a long time).
[info] Provisioning volume from snapshot snap-6effe0e4b.
[info] Obtaining a staging server.
[info]    Creating keypair staging-key-374eeea6.
[info]    Creating staging security group ssh-ad5edr3.
[info]    Searching for a staging image...
[info]    ...found ami-608acd32: ubuntu/images/ubuntu-maverick-10.10-i386-server-20120410.
[info]    Waiting for ssh daemon on i-b6647de2.
[info] Using snapshot snap-6f020e4b...
[info] Mounting staging volume at /dev/sdf1 on /mnt/Staging/volume-6b3baee2.
[info] Provisioning a new 10 GB ext4 volume.
[info] Obtaining a staging server.
[info]    Creating keypair staging-key-28926fef29.
[info]    Creating staging security group ssh-7b3efef9af50.
[info]    Searching for a staging image...
[info]    ...found ami-7b8f5712: ubuntu/images/ubuntu-maverick-10.10-i386-server-20120410.
[info]    Waiting for ssh daemon on i-75039709.
[info] Provisioning a new 10 GB volume...
[info] Making ext4 filesystem on staging volume...
[info] Mounting staging volume at /dev/sdf1 on /mnt/Staging/volume-d522931d.
[info] creating ssh key for server to server data transfer.
[info] Beginning rsync /mnt/Staging/volume-6b3baee2/ ec2-23-22-163-223.compute-1.amazonaws.com:/mnt/Staging/volume-d522931d/...
[info] ...rsync done.
[info]    unmounting vol-e24d0efe99f...
[info]    snapshotting vol-e24efed099f
[info]    unmounting vol-2c117efed08...
[info]    deleting vol-2c1fef17d08...
[info]    deleting vol-e24efwd099f...
[info]    Waiting for all snapshots to complete. This may take a long time.
[info]    Registering snapshot in destination with the equivalent of:
[info]    ec2-register -n 'XDDDDDD2.0' -d 'XDDDDDD2.0' -a x86_64 --kernel aki-88aa75e1 --ramdisk '' --root-device-name /dev/sda1 -b /dev/sda1=snap-5f1e9729:10:true:standard
[info]    Terminating servers i-b6647de2.
[info]    Terminating servers i-75039709.
New snapshot is now located in us-east-1 under ami-062a926f.
7.移轉完成

我想這個作法是目前比較輕鬆可以進行移轉的方式
就把我實作的方式跟大家分享了
有相同的需求都可以參考看看