我的应用程序托管在 Amazon Web Services 上,我开始编写应用程序所有基础设施(VPC、安全组、Beanstalk 等)的创建脚本。我没有找到创建 RDS Aurora 集群的正确方法,并且无法使用 Boto3 在 Python 中重现 RDS 向导(帮助您创建数据库实例和集群)。也许我缺乏基础设施和网络方面的知识,但我认为创建 Aurora 集群对我来说一定是可以的。
这是我的问题: 假设我有一个 VPC ID、一个安全组 ID 和一些数据库信息(用户、密码...),创建集群并使其可供我的应用程序使用的最少 API 调用是什么?该过程必须以集群读取器/写入器端点和仅读取器端点结束。
最佳答案
以下是我如何在 Python/BOTO3 中创建 Aurora MySQL 实例。你必须自己实现一些缺失的功能。
def create_aurora(
instance_identifier, # used for instance name and cluster name
db_username,
db_password,
db_name,
db_port,
vpc_id,
vpc_sg, # Must be an array
dbsubnetgroup_name,
public_access = False,
AZ = None,
instance_type = "db.t2.small",
multi_az = True,
nb_instance = 1,
extratags = []
):
rds = boto3.client('rds')
# Assume a DB SUBNET Groups exists before creating the cluster. You must have created a DBSUbnetGroup associated to the Subnet of the VPC of your cluster. AWS will find it automatically.
#
# Search if the cluster exists
try:
db_cluster = rds.describe_db_clusters(
DBClusterIdentifier = instance_identifier
)['DBClusters']
db_cluster = db_cluster[0]
except botocore.exceptions.ClientError as e:
psa.printf("Creating empty cluster\r\n");
res = rds.create_db_cluster(
DBClusterIdentifier = instance_identifier,
Engine="aurora",
MasterUsername=db_username,
MasterUserPassword=db_password,
DBSubnetGroupName=dbsubnetgroup_name,
VpcSecurityGroupIds=vpc_sg,
AvailabilityZones=AZ
)
db_cluster = res['DBCluster']
cluster_name = db_cluster['DBClusterIdentifier']
instance_identifier = db_cluster['DBClusterIdentifier']
psa.printf("Cluster identifier : %s, status : %s, members : %d\n", instance_identifier , db_cluster['Status'], len(db_cluster['DBClusterMembers']))
if (db_cluster['Status'] == 'deleting'):
psa.printf(" Please wait for the cluster to be deleted and try again.\n")
return None
psa.printf(" Writer Endpoint : %s\n", db_cluster['Endpoint'])
psa.printf(" Reader Endpoint : %s\n", db_cluster['ReaderEndpoint'])
# Now create instances
# Loop on requested number of instance, and balance them on AZ
for i in range(1, nb_instance+1):
if AZ != None:
the_AZ = AZ[i -1 % len(AZ)]
dbinstance_id = instance_identifier+"-"+str(i)+"-"+the_AZ
else:
the_AZ = None
dbinstance_id = instance_identifier+"-"+str(i)
psa.printf("Creating instance %d named '%s' in AZ %s\n", i, dbinstance_id, the_AZ)
try:
res = rds.create_db_instance(
DBInstanceIdentifier=dbinstance_id,
DBInstanceClass=instance_type,
Engine='aurora',
PubliclyAccessible=False,
AvailabilityZone=the_AZ,
DBSubnetGroupName=dbsubnetgroup_name,
DBClusterIdentifier=instance_identifier,
Tags = psa.tagsKeyValueToAWStags(extratags)
)['DBInstance']
psa.printf(" DbiResourceId=%s\n", res['DbiResourceId'])
except botocore.exceptions.ClientError as e:
psa.printf(" Instance seems to exists.\n")
res = rds.describe_db_instances(DBInstanceIdentifier = dbinstance_id)['DBInstances']
psa.printf(" Status is %s\n", res[0]['DBInstanceStatus'])
return db_cluster
关于amazon-web-services - AWS : How to programmatically create a RDS Aurora Cluster in Python/Boto3,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43854880/