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swapprodwestapi.py
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swapprodwestapi.py
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import boto3
import json
import datetime
import os
#alb = boto3.client('elbv2')
#dynamo_client = boto3.client('dynamodb')
sts = boto3.client('sts')
### CROSSACCOUNT DYNAMO ACCESS TO SHARED ACCOUNT ###
stsrolearn = os.environ['STSROLEARN']
response = sts.assume_role(RoleArn=stsrolearn, RoleSessionName='CrossAccountECSDynamoTableAccess')
aws_access_key_id=response['Credentials']['AccessKeyId']
aws_secret_access_key=response['Credentials']['SecretAccessKey']
aws_session_token=response['Credentials']['SessionToken']
dynamo_client = boto3.client('dynamodb', aws_access_key_id=aws_access_key_id,aws_secret_access_key=aws_secret_access_key,aws_session_token=aws_session_token)
resource = boto3.resource('dynamodb', aws_access_key_id=aws_access_key_id,aws_secret_access_key=aws_secret_access_key,aws_session_token=aws_session_token)
nonprod_table = resource.Table('ECS_Inventory_NonProduction')
prod_table = resource.Table('ECS_Inventory_Production_West')
trainda_table = resource.Table('ECS_Inventory_Training_DA')
#### ###
#CROSS ACCOUNT ALB ACCESS TO NONPROD ACCOUNT
stsrole_prod = os.environ['STSROLE_PROD']
response = sts.assume_role(RoleArn=stsrole_prod, RoleSessionName='crossAccountEcsTaskExecutionRole')
aws_access_key_id=response['Credentials']['AccessKeyId']
aws_secret_access_key=response['Credentials']['SecretAccessKey']
aws_session_token=response['Credentials']['SessionToken']
elbclient_prod = boto3.client('elbv2', aws_access_key_id=aws_access_key_id,aws_secret_access_key=aws_secret_access_key,aws_session_token=aws_session_token,region_name='us-west-2')
sns_prod = boto3.client('sns', aws_access_key_id=aws_access_key_id,aws_secret_access_key=aws_secret_access_key,aws_session_token=aws_session_token,region_name='us-west-2')
### ###
### RETURN BODY FOR API ###
def return_body(status_code, message):
body = {
'statusCode': str(status_code),
'body': json.dumps(message),
'headers': {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*'
}
}
return body
### ###
### SEND SNS NOTIFICATION ###
def sendnotification(appname, prod1, prod2, prod_acc, version):
if prod1 == 'green':
env_name = appname + "-prod2"
else:
env_name = appname + "-prod1"
sns_arn = "arn:aws:sns:us-west-2:" + prod_acc + ":ECSNotifications-" + env_name
print sns_arn
sns_message = "Updated West Green Environment: " + env_name + "\n" + "Running Version: " + version
subject = "Swap on Application " + appname + " has been perfromed in West Region"
response = sns_prod.publish(TopicArn=sns_arn, Message=sns_message, Subject=subject)
print response
#### ####
# MODIFY LISTENER RULES FOR SWAP #
def modifyrules(rule_arn_blue, targetgrp_arn_blue, rule_arn_green, targetgrp_arn_green):
response_green = elbclient_prod.modify_rule(RuleArn=rule_arn_green, Actions=[{'Type': 'forward', 'TargetGroupArn': targetgrp_arn_blue}])
print response_green
response_blue = elbclient_prod.modify_rule(RuleArn=rule_arn_blue, Actions=[{'Type': 'forward', 'TargetGroupArn': targetgrp_arn_green}])
print response_blue
# RETRIEVE TASK DEFINITIONS FOR SWAPPING #
def gettaskdefinition(appname):
albname = appname + '-prod'
resp = elbclient_prod.describe_load_balancers(Names=[albname])
alb_arn = resp['LoadBalancers'][0]['LoadBalancerArn']
response = elbclient_prod.describe_listeners(LoadBalancerArn=alb_arn)
listener_arn = response['Listeners'][0]['ListenerArn']
res = elbclient_prod.describe_rules(ListenerArn=listener_arn)
for rule in res['Rules']:
rule_arn = rule['RuleArn']
print rule_arn
priority = rule['Priority']
if priority == '1':
hostheader_value = rule['Conditions'][0]['Values']
print hostheader_value[0]
rule_arn_green = rule_arn
targetgrp_arn_green = rule['Actions'][0]['TargetGroupArn']
print targetgrp_arn_green
print
if priority == '2':
hostheader_value = rule['Conditions'][0]['Values']
print hostheader_value[0]
rule_arn_blue = rule_arn
targetgrp_arn_blue = rule['Actions'][0]['TargetGroupArn']
print targetgrp_arn_blue
print
modifyrules(rule_arn_blue, targetgrp_arn_blue, rule_arn_green, targetgrp_arn_green)
def updatelisteners(swap):
listener_arn = str(swap['type1'][0])
targetgrp_arn = str(swap['type2'][2])
response = alb.modify_listener(ListenerArn = listener_arn, DefaultActions = [{'Type': 'forward', 'TargetGroupArn': targetgrp_arn}])
listener_arn = str(swap['type2'][0])
targetgrp_arn = str(swap['type1'][2])
response = alb.modify_listener(ListenerArn = listener_arn, DefaultActions = [{'Type': 'forward', 'TargetGroupArn': targetgrp_arn}])
def recordswap(appname):
dynamo_response = dynamo_client.get_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD1'}}, AttributesToGet=['TechnicalTeam', 'Time', 'URL', 'Version'])
print dynamo_response
url = dynamo_response['Item']['URL']['S']
techteam = dynamo_response['Item']['TechnicalTeam']['S']
if 'prod-blue' in url:
time_blue = dynamo_response['Item']['Time']['S']
url_blue = url
version = dynamo_response['Item']['Version']['S']
prod1 = 'blue'
else:
time_green = dynamo_response['Item']['Time']['S']
url_green = url
#version_green = dynamo_response['Item']['Version']['S']
prod1 = 'green'
dynamo_response = dynamo_client.get_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD2'}}, AttributesToGet=['TechnicalTeam', 'Time', 'URL', 'Version'])
url = dynamo_response['Item']['URL']['S']
techteam = dynamo_response['Item']['TechnicalTeam']['S']
if 'prod-blue' in url:
time_blue = dynamo_response['Item']['Time']['S']
url_blue = url
version = dynamo_response['Item']['Version']['S']
prod2 = 'blue'
else:
time_green = dynamo_response['Item']['Time']['S']
url_green = url
#version_green = dynamo_response['Item']['Version']['S']
prod2 = 'green'
time = datetime.datetime.now()
if prod1 == 'green':
resp = dynamo_client.update_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD1'}}, AttributeUpdates={'URL':{'Value':{'S': url_blue}}, 'Time':{'Value':{'S': str(time)}}})
print resp
resp = dynamo_client.update_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD2'}}, AttributeUpdates={'URL':{'Value':{'S': url_green}}, 'Time':{'Value':{'S': str(time)}}})
print resp
else:
resp = dynamo_client.update_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD2'}}, AttributeUpdates={'URL':{'Value':{'S': url_blue}}, 'Time':{'Value':{'S': str(time)}}})
print resp
resp = dynamo_client.update_item(TableName="ECS_Inventory_Production_West", Key={'ApplicationName': {'S': appname}, 'Environment': {'S': 'PROD1'}}, AttributeUpdates={'URL':{'Value':{'S': url_green}}, 'Time':{'Value':{'S': str(time)}}})
print resp
return prod1, prod2, version
def lambda_handler(event, context):
print event
body = json.loads(event['body'])
prod_acc = os.environ['PROD_ACC']
try:
appname = body['applicationName']
if appname == "":
status_code = 400
message = {"errorMessage": "applicationName cannot be empty"}
return_message = return_body(status_code, message)
return return_message
except KeyError:
status_code = 400
message = {"errorMessage": "applicationName needs to be mentioned"}
return_message = return_body(status_code, message)
return return_message
alb_name = appname + '-prod'
swap = {}
try:
env = "PROD1"
resp = table.query(KeyConditionExpression=Key('ApplicationName').eq(appname) & Key('Environment').eq(env))
if resp['Count'] == 0:
status_code = 409
message = {"errorMessage": appname + " does not exist. You must create the Stack first"}
return_message = return_body(status_code, message)
return return_message
except Exception as e:
message = e
message = "Starting Prod Blue/Green Swap for " + appname + " in West Region"
#time = datetime.datetime.now()
#resp = dynamo_client.put_item(TableName="DevOpsLogsTable", Item={'ResourceName': {'S': 'swapprod'}, 'Time': {'S': str(time)}, 'Message': {'S': message}})
#print resp
gettaskdefinition(appname)
prod1, prod2, version = recordswap(appname)
sendnotification(appname, prod1, prod2, prod_acc, version)
message = "Prod Blue/Green Swap in West Region Completed Successfully for " + appname
#time = datetime.datetime.now()
#resp = dynamo_client.put_item(TableName="DevOpsLogsTable", Item={'ResourceName': {'S': 'swapprod'}, 'Time': {'S': str(time)}, 'Message': {'S': message}})
#print resp
status_code = 200
return_message = {"message": message}
return_message = return_body(status_code, return_message)
return return_message