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# 升级域（SDK）
<a name="starting-upgrades-sdk"></a>

此示例使用中的[OpenSearchService](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/opensearch.html)低级 Python 客户端 Amazon SDK for Python (Boto) 来检查域是否符合升级到特定版本的资格，对其进行升级，并持续检查升级状态。

```
import boto3
from botocore.config import Config
import time

# Build the client using the default credential configuration.
# You can use the CLI and run 'aws configure' to set access key, secret
# key, and default Region.

DOMAIN_NAME = ''  # The name of the domain to upgrade
TARGET_VERSION = ''  # The version you want to upgrade the domain to. For example, OpenSearch_1.1

my_config = Config(
    # Optionally lets you specify a Region other than your default.
    region_name='us-east-1'
)
client = boto3.client('opensearch', config=my_config)


def check_versions():
    """Determine whether domain is eligible for upgrade"""
    response = client.get_compatible_versions(
        DomainName=DOMAIN_NAME
    )
    compatible_versions = response['CompatibleVersions']
    for i in range(len(compatible_versions)):
        if TARGET_VERSION in compatible_versions[i]["TargetVersions"]:
            print('Domain is eligible for upgrade to ' + TARGET_VERSION)
            upgrade_domain()
            print(response)
        else:
            print('Domain not eligible for upgrade to ' + TARGET_VERSION)


def upgrade_domain():
    """Upgrades the domain"""
    response = client.upgrade_domain(
        DomainName=DOMAIN_NAME,
        TargetVersion=TARGET_VERSION
    )
    print('Upgrading domain to ' + TARGET_VERSION + '...' + response)
    time.sleep(5)
    wait_for_upgrade()


def wait_for_upgrade():
    """Get the status of the upgrade"""
    response = client.get_upgrade_status(
        DomainName=DOMAIN_NAME
    )
    if (response['UpgradeStep']) == 'UPGRADE' and (response['StepStatus']) == 'SUCCEEDED':
        print('Domain successfully upgraded to ' + TARGET_VERSION)
    elif (response['StepStatus']) == 'FAILED':
        print('Upgrade failed. Please try again.')
    elif (response['StepStatus']) == 'SUCCEEDED_WITH_ISSUES':
        print('Upgrade succeeded with issues')
    elif (response['StepStatus']) == 'IN_PROGRESS':
        time.sleep(30)
        wait_for_upgrade()


def main():
    check_versions()


if __name__ == "__main__":
    main()
```