Shantanu's Blog

Corporate Consultant

April 12, 2012

 

API tools to manage instances

#!/bin/sh
# here are commands those can be part of shell script that will do most of the instance management tasks for you.

#!/bin/sh

# defince variables
ami_id='ami-5647a33f'
private_key='pk-developer.pem'
cert='cert-developer.pem'
instance_type='t1.micro'
## t1.micro 0.02 ## m1.small 0.08 ## m1.medium 0.16 ## c1.medium 0.165 ## m1.large 0.32 ## m2.xlarge 0.45 ## m1.xlarge 0.64
## c1.xlarge 0.66 ## m2.2xlarge 0.9 ## cc1.4xlarge 1.3 ## m2.4xlarge 1.8 ## cg1.4xlarge 2.1 ## cc2.8xlarge 2.4

zone='us-east-1a'
group='quick-start-1'
# default group will be used if not specified
key='virginia_developer'
# default region is virginia us-east-1
region='us-east-1'
## us-west-2 US West Oregon ## us-west-1 US West N. California ## eu-west-1 EU West Ireland
## ap-southeast-1 Asia Pacific Singapore ## ap-northeast-1 Asia Pacific Tokyo ## sa-east-1 South America Sao Paulo

# size in GB and mount point
volume_size='100'
volume_device='/dev/sdh'


cat > pk-developer.pem << "my_heredoc"
-----BEGIN PRIVATE KEY-----
-----END PRIVATE KEY-----
my_heredoc

cat > cert-developer.pem << "my_certdoc"
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
my_certdoc

cat > virginia_developer.pem << "my_devkey"
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
my_devkey

cat > oregon_developer.pem << "my_devkey"
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
my_devkey

chmod 700 *.pem

# set environment variables
export EC2_PRIVATE_KEY=$private_key
export EC2_CERT=$cert

ec2-run-instances $ami_id --instance-type $instance_type --region $region --availability-zone $zone --group $group --key $key > run_instances_stan.txt

instance_id=`egrep ^INSTANCE run_instances_stan.txt | cut -f 2`
instance_date=`egrep ^INSTANCE run_instances_stan.txt | cut -f 7`
instance_aki=`egrep ^INSTANCE run_instances_stan.txt | cut -f 9`
instance_ari=`egrep ^INSTANCE run_instances_stan.txt | cut -f 10`

ec2-create-volume --size $volume_size --availability-zone $zone > create_volume_stan.txt

volume_id=`egrep ^VOLUME create_volume_stan.txt | cut -f 2`
volume_date=`egrep ^VOLUME create_volume_stan.txt | cut -f 6`

sleep 120

ec2-describe-instances --region $region "$instance_id" > describe_instances_stan.txt

instance_ip=$(egrep ^INSTANCE describe_instances_stan.txt | cut -f4)

ec2-attach-volume $volume_id --instance $instance_id --device $volume_device

MOUNT=' mkdir /data; mkfs.ext3 /dev/sdh; mount -t ext3 /dev/sdh /data; echo "/dev/sdh /data ext3 defaults 0 0" >>/etc/fstab; '
CMD="$MOUNT echo 0 > /selinux/enforce; yum -y install mysql mysql-server mysql-client java; sed -i.bak 's| *datadir *=.*|datadir = /data/|g' /etc/my.cnf; mysql_install_db ; /etc/init.d/mysqld start ; "

ssh -i $key.pem root@$instance_ip "$CMD"

exit

cat > README << "readme_heredoc"

# get the volume ID
src_volumeid=$(egrep ^BLOCKDEVICE describe_instances_stan.txt | cut -f3)

# Now get the snapshot id from the volume id
ec2-describe-volumes --region $region "$instance_id" | egrep ^VOLUME > /tmp/volume_info
src_snapshotid=$(cut /tmp/volume_info | cut -f2)
echo $src_snapshotid
src_size=$(cut /tmp/volume_info | cut -f2)
echo $src_size
# Create a new volume from the snapshot
#src_volumeid=$(ec2-create-volume --region $src_region --snapshot $src_snapshotid -z $src_availability_zone | egrep ^VOLUME | cut -f2)
echo $src_volumeid

ec2-attach-volume --region $src_region $src_volumeid -i $src_instanceid -d $src_device

# install required tools

# ubuntu
sudo apt-get install ec2-api-tools

# fedora
# http://rpmfind.net/linux/rpm2html/search.php?query=ec2-api-tools
wget ftp://rpmfind.net/linux/rpmfusion/nonfree/el/updates/testing/5/i386/ec2-api-tools-1.3.36506-1.el5.noarch.rpm
yum install java
rpm -iUh *.rpm

# describe default images owned by Amazon
ec2-describe-images -o amazon

## terminate instances
# ec2-terminate-instances

## snapshots

Make note of the volume-id and device it’s connected to, eg: vol-abcd1234 and /dev/sdf also make a note of the ramdisk and kernel your running instance is using.
They’ll be something like “ari-12345678″ and “aki-abcdef12″.

# ec2-create-snapshot vol-abcd1234

That’ll give you a snapshot-id back. You then need to wait for the snapshot to finish. Keep running this until it says it’s “completed”:

# ec2-describe-snapshots snap-1234abcd

Finally, you can register the snapshot as an AMI:

# ec2-register –snapshot snap-1234abcd –description “your description here” –name “something-significant-here” –ramdisk ari-12345678 –kernel aki-abcdef12

ec2-describe-instances --private-key pk-developer.pem --cert cert-developer.pem

ec2-create-image -n "My AMI" i-eb977f82

ec2-create-tags

readme_heredoc

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