Adding scripts to luanch and terminate instance

Author: Rupali Behera

config.yaml

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+AWS_ACCESS_KEY_ID : 'Your Aws Acces key'
+AWS_SECRET_ACCESS_KEY : 'Your Aws Secret'
+REGION : 'Specify the region'
+KEY : 'Specify the key'
+INSTANCE_TYPE : 'Specify the instance type'
+USER : 'ec2-user'

launch_instance.py

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+#!/usr/bin/env python
+import boto
+import boto.ec2
+import os
+from optparse import OptionParser
+import sys
+import time
+import yaml
+
+
+dirname = os.path.abspath(os.path.dirname(__file__))
+config = yaml.load(open(os.path.join(dirname,"config.yaml"), "r"))
+
+def getConnection():
+  return boto.ec2.connect_to_region(config['REGION'], \
+                                    aws_access_key_id = config['AWS_ACCESS_KEY_ID'],
+                                    aws_secret_access_key = config['AWS_SECRET_ACCESS_KEY'])
+
+def launchInstance(ami):
+
+  conn = getConnection()
+  image = conn.get_image(ami)
+
+  security_groups = ['basic_server',]
+
+  reservation = image.run(key_name=config['KEY'],
+                          security_groups=security_groups,
+                          instance_type=config['INSTANCE_TYPE'])
+
+  instance = reservation.instances[0]
+  print instance
+  instanceId=instance.id
+  conn.create_tags([instanceId],
+                   {"Name": '%s' % (tag_to_instance or "instance_launched_with_boto")})
+
+  print "Spinning up instance for '%s'. Waiting for it to boot up." % (ami)
+  while instance.state == 'pending':
+    print "Instance state: %s" % (instance.state)
+    time.sleep(10)
+    instance.update()
+
+  publicDnsName = instance.public_dns_name
+  print "Instance is running, public dns : %s" % publicDnsName
+  return publicDnsName,instanceId
+
+
+
+if __name__=='__main__':
+
+  parser = OptionParser()
+  parser.add_option('-a', '--ami', dest = 'ami', type = "string",
+                    help = 'The AMI from which the instance should be launched')
+  parser.add_option('-t', '--tag', dest = 'tag', type = "string",
+                    help = 'Give a tag to the instance')
+  (options, args) = parser.parse_args()
+
+  ami = options.ami
+  tag_to_instance = options.tag
+
+if not ami :
+  print "Please provide the AMI to bring up the instance."
+  sys.exit(1)
+
+#launching instance with the give AMI
+publicDnsName, instanceId = launchInstance(ami)

terminate_instance.py

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+#!/usr/bin/env python
+import boto.ec2
+import os
+from optparse import OptionParser
+import sys
+import yaml
+
+
+dirname = os.path.abspath(os.path.dirname(__file__))
+config = yaml.load(open(os.path.join(dirname,"config.yaml"), "r"))
+
+def getConnection():
+  return boto.ec2.connect_to_region(config['REGION'], \
+                                    aws_access_key_id = config['AWS_ACCESS_KEY_ID'],
+                                    aws_secret_access_key = config['AWS_SECRET_ACCESS_KEY'])
+
+
+
+def terminateInstance(instanceId):
+  conn = getConnection()
+  conn.terminate_instances(instance_ids=[instanceId])
+
+if __name__=='__main__':
+
+  parser = OptionParser()
+  parser.add_option('-i', '--instance-id', dest = 'instanceId',
+                    type = "string",help = 'The Instance to be terminated')
+  (options, args) = parser.parse_args()
+
+  instanceId = options.instanceId
+
+if not instanceId :
+  print "Please provide the instance-id to teardown it."
+  sys.exit(1)
+
+print "Terminating Instance %s" % instanceId
+terminateInstance(instanceId)