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AWS CLI Command describe-orderable-db-instance-option for Amazon DocumentDB

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I am trying to get the list of instance classes available in my region for Amazon DocumentDB using CLI command:

aws docdb describe-orderable-db-instance-options --engine docdb --query 'OrderableDBInstanceOptions[*].DBInstanceClass'

shared at guide: https://docs.aws.amazon.com/documentdb/latest/developerguide/db-instance-add.html

Unfortunately I got repeating entries in the output. Is there a specific reason that I got multiple entries for an instance class?

Following is the outcome for eu-central-1 Frankfurt regions

[ "db.r5.12xlarge", "db.r5.16xlarge", "db.r5.24xlarge", "db.r5.2xlarge", "db.r5.4xlarge", "db.r5.8xlarge", "db.r5.large", "db.r5.xlarge", "db.t3.medium", "db.r5.12xlarge", "db.r5.16xlarge", "db.r5.24xlarge", "db.r5.2xlarge", "db.r5.4xlarge", "db.r5.8xlarge", "db.r5.large", "db.r5.xlarge", "db.r6g.12xlarge", "db.r6g.16xlarge", "db.r6g.2xlarge", "db.r6g.4xlarge", "db.r6g.8xlarge", "db.r6g.large", "db.r6g.xlarge", "db.t3.medium", "db.t4g.medium", "db.r5.12xlarge", "db.r5.12xlarge", "db.r5.16xlarge", "db.r5.16xlarge", "db.r5.24xlarge", "db.r5.24xlarge", "db.r5.2xlarge", "db.r5.2xlarge", "db.r5.4xlarge", "db.r5.4xlarge", "db.r5.8xlarge", "db.r5.8xlarge", "db.r5.large", "db.r5.large", "db.r5.xlarge", "db.r5.xlarge", "db.r6g.12xlarge", "db.r6g.12xlarge", "db.r6g.16xlarge", "db.r6g.16xlarge", "db.r6g.2xlarge", "db.r6g.2xlarge", "db.r6g.4xlarge", "db.r6g.4xlarge", "db.r6g.8xlarge", "db.r6g.8xlarge", "db.r6g.large", "db.r6g.large", "db.r6g.xlarge", "db.r6g.xlarge", "db.t3.medium", "db.t3.medium", "db.t4g.medium", "db.t4g.medium" ]

Thanks a lot,

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Eralper
已提问 4 个月前212 查看次数
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Hello,

You can try the below command for the desired result

aws docdb describe-orderable-db-instance-options --engine docdb --query 'OrderableDBInstanceOptions[*].DBInstanceClass' | jq -r '.[]' | sort | uniq

This can occur for a few reasons for multiple entries:

  • The same instance class is available for different instance storage types (standard, provisioned IOPS). Each storage type will be listed separately.
  • In some Regions, the same class is available with both VPC and non-VPC network connectivity options. These will appear as duplicates.
  • If an instance class has different capabilities or configurations available in the current Region, each variant will be listed separately.

Let me know if you have any other issues

Thanks

Abhinav

Abhinav Chauhan
已回答 4 个月前
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Gary Mclean
已审核 4 个月前
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Didier_Durand
已审核 4 个月前
  • Didier_Durand 专家
    4 个月前

    The repeated DBInstanceClass comes from OrderableDBInstanceOptions[*] in your query: several OrderableDBInstanceOptions point to same instance class. Just remove the --query option and submit again to see the original data structure with repeated classes.

  • Gary Mclean 专家
    4 个月前

    Abhinav is correct. Its because there are different storage types along with Engine Versions. You would have to add additonal filters to match your requirements.

  • Eralper
    4 个月前

    Great it works! Thanks a lot for the explanations, as I understand for scaling, I should pass the Instance Options parameters accordingly to get the list of correct instance classes for the minimum higher configuration.

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