Use DescribeInstanceTypes with an Amazon SDK or CLI

    /// <summary>
    /// Describe the instance types available.
    /// </summary>
    /// <returns>A list of instance type information.</returns>
    public async Task<List<InstanceTypeInfo>> DescribeInstanceTypes(ArchitectureValues architecture)
    {
        try
        {
            var request = new DescribeInstanceTypesRequest();

            var filters = new List<Filter>
            {
                new Filter("processor-info.supported-architecture",
                    new List<string> { architecture.ToString() })
            };
            filters.Add(new Filter("instance-type", new() { "*.micro", "*.small" }));

            request.Filters = filters;
            var instanceTypes = new List<InstanceTypeInfo>();

            var paginator = _amazonEC2.Paginators.DescribeInstanceTypes(request);
            await foreach (var instanceType in paginator.InstanceTypes)
            {
                instanceTypes.Add(instanceType);
            }

            return instanceTypes;
        }
        catch (AmazonEC2Exception ec2Exception)
        {
            if (ec2Exception.ErrorCode == "InvalidParameterValue")
            {
                _logger.LogError(
                    $"Parameters are invalid. Ensure architecture and size strings conform to DescribeInstanceTypes API reference.");
            }

            throw;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Couldn't delete the security group because: {ex.Message}");
            throw;
        }
    }

###############################################################################
# ec2_describe_instance_types
#
# This function describes EC2 instance types filtered by processor architecture
# and optionally by instance type. It takes the following arguments:
#
# -a, --architecture ARCHITECTURE  Specify the processor architecture (e.g., x86_64)
# -t, --type INSTANCE_TYPE         Comma-separated list of instance types (e.g., t2.micro)
# -h, --help                       Show the usage help
#
# The function prints the instance type and supported architecture for each
# matching instance type.
###############################################################################
function ec2_describe_instance_types() {
  local architecture=""
  local instance_types=""

  # bashsupport disable=BP5008
  function usage() {
    echo "Usage: ec2_describe_instance_types [-a|--architecture ARCHITECTURE] [-t|--type INSTANCE_TYPE] [-h|--help]"
    echo "  -a, --architecture ARCHITECTURE  Specify the processor architecture (e.g., x86_64)"
    echo "  -t, --type INSTANCE_TYPE         Comma-separated list of instance types (e.g., t2.micro)"
    echo "  -h, --help                       Show this help message"
  }

  while [[ $# -gt 0 ]]; do
    case "$1" in
      -a | --architecture)
        architecture="$2"
        shift 2
        ;;
      -t | --type)
        instance_types="$2"
        shift 2
        ;;
      -h | --help)
        usage
        return 0
        ;;
      *)
        echo "Unknown argument: $1"
        return 1
        ;;
    esac
  done

  if [[ -z "$architecture" ]]; then
    errecho "Error: Architecture not specified."
    usage
    return 1
  fi

  if [[ -z "$instance_types" ]]; then
    errecho "Error: Instance type not specified."
    usage
    return 1
  fi

  local tmp_json_file="temp_ec2.json"
  echo -n '[
    {
      "Name": "processor-info.supported-architecture",
      "Values": [' >"$tmp_json_file"

  local items
  IFS=',' read -ra items <<<"$architecture"
  local array_size
  array_size=${#items[@]}
  for i in $(seq 0 $((array_size - 1))); do
    echo -n '"'"${items[$i]}"'"' >>"$tmp_json_file"
    if [[ $i -lt $((array_size - 1)) ]]; then
      echo -n ',' >>"$tmp_json_file"
    fi
  done
  echo -n ']},
    {
    "Name": "instance-type",
      "Values": [' >>"$tmp_json_file"
  IFS=',' read -ra items <<<"$instance_types"
  local array_size
  array_size=${#items[@]}
  for i in $(seq 0 $((array_size - 1))); do
    echo -n '"'"${items[$i]}"'"' >>"$tmp_json_file"
    if [[ $i -lt $((array_size - 1)) ]]; then
      echo -n ',' >>"$tmp_json_file"
    fi
  done

  echo -n ']}]' >>"$tmp_json_file"

  local response
  response=$(aws ec2 describe-instance-types --filters file://"$tmp_json_file" \
    --query 'InstanceTypes[*].[InstanceType]' --output text)

  local error_code=$?

  rm "$tmp_json_file"

  if [[ $error_code -ne 0 ]]; then
    aws_cli_error_log $error_code
    echo "ERROR: AWS reports describe-instance-types operation failed."
    return 1
  fi

  echo "$response"
  return 0
}

The utility functions used in this example.

###############################################################################
# function errecho
#
# This function outputs everything sent to it to STDERR (standard error output).
###############################################################################
function errecho() {
  printf "%s\n" "$*" 1>&2
}

##############################################################################
# function aws_cli_error_log()
#
# This function is used to log the error messages from the AWS CLI.
#
# The function expects the following argument:
#         $1 - The error code returned by the AWS CLI.
#
#  Returns:
#          0: - Success.
#
##############################################################################
function aws_cli_error_log() {
  local err_code=$1
  errecho "Error code : $err_code"
  if [ "$err_code" == 1 ]; then
    errecho "  One or more S3 transfers failed."
  elif [ "$err_code" == 2 ]; then
    errecho "  Command line failed to parse."
  elif [ "$err_code" == 130 ]; then
    errecho "  Process received SIGINT."
  elif [ "$err_code" == 252 ]; then
    errecho "  Command syntax invalid."
  elif [ "$err_code" == 253 ]; then
    errecho "  The system environment or configuration was invalid."
  elif [ "$err_code" == 254 ]; then
    errecho "  The service returned an error."
  elif [ "$err_code" == 255 ]; then
    errecho "  255 is a catch-all error."
  fi

  return 0
}

Example 1: To describe an instance type

The following describe-instance-types example displays details for the specified instance type.

aws ec2 describe-instance-types \
    --instance-types t2.micro

Output:

{
    "InstanceTypes": [
        {
            "InstanceType": "t2.micro",
            "CurrentGeneration": true,
            "FreeTierEligible": true,
            "SupportedUsageClasses": [
                "on-demand",
                "spot"
            ],
            "SupportedRootDeviceTypes": [
                "ebs"
            ],
            "BareMetal": false,
            "Hypervisor": "xen",
            "ProcessorInfo": {
                "SupportedArchitectures": [
                    "i386",
                    "x86_64"
                ],
                "SustainedClockSpeedInGhz": 2.5
            },
            "VCpuInfo": {
                "DefaultVCpus": 1,
                "DefaultCores": 1,
                "DefaultThreadsPerCore": 1,
                "ValidCores": [
                    1
                ],
                "ValidThreadsPerCore": [
                    1
                ]
            },
            "MemoryInfo": {
                "SizeInMiB": 1024
            },
            "InstanceStorageSupported": false,
            "EbsInfo": {
                "EbsOptimizedSupport": "unsupported",
                "EncryptionSupport": "supported"
            },
            "NetworkInfo": {
                "NetworkPerformance": "Low to Moderate",
                "MaximumNetworkInterfaces": 2,
                "Ipv4AddressesPerInterface": 2,
                "Ipv6AddressesPerInterface": 2,
                "Ipv6Supported": true,
                "EnaSupport": "unsupported"
            },
            "PlacementGroupInfo": {
                "SupportedStrategies": [
                    "partition",
                    "spread"
                ]
            },
            "HibernationSupported": false,
            "BurstablePerformanceSupported": true,
            "DedicatedHostsSupported": false,
            "AutoRecoverySupported": true
        }
    ]
}

For more information, see Instance Types in Amazon Elastic Compute Cloud User Guide for Linux Instances.

Example 2: To filter the available instance types

You can specify a filter to scope the results to instance types that have a specific characteristic. The following describe-instance-types example lists the instance types that support hibernation.

aws ec2 describe-instance-types \
    --filters Name=hibernation-supported,Values=true --query 'InstanceTypes[*].InstanceType'

Output:

[
    "m5.8xlarge",
    "r3.large",
    "c3.8xlarge",
    "r5.large",
    "m4.4xlarge",
    "c4.large",
    "m5.xlarge",
    "m4.xlarge",
    "c3.large",
    "c4.8xlarge",
    "c4.4xlarge",
    "c5.xlarge",
    "c5.12xlarge",
    "r5.4xlarge",
    "c5.4xlarge"
]

For more information, see Instance Types in Amazon Elastic Compute Cloud User Guide for Linux Instances.

    /**
     * Asynchronously retrieves the instance types available in the current AWS region.
     * <p>
     * This method uses the AWS SDK's asynchronous API to fetch the available instance types
     * and then processes the response. It logs the memory information, network information,
     * and instance type for each instance type returned. Additionally, it returns a
     * {@link CompletableFuture} that resolves to the instance type string for the "t2.2xlarge"
     * instance type, if it is found in the response. If the "t2.2xlarge" instance type is not
     * found, an empty string is returned.
     * </p>
     *
     * @return a {@link CompletableFuture} that resolves to the instance type string for the
     * "t2.2xlarge" instance type, or an empty string if the instance type is not found
     */
    public CompletableFuture<String> getInstanceTypesAsync() {
        DescribeInstanceTypesRequest typesRequest = DescribeInstanceTypesRequest.builder()
            .maxResults(10)
            .build();

        CompletableFuture<DescribeInstanceTypesResponse> response = getAsyncClient().describeInstanceTypes(typesRequest);
        response.whenComplete((resp, ex) -> {
            if (resp != null) {
                List<InstanceTypeInfo> instanceTypes = resp.instanceTypes();
                for (InstanceTypeInfo type : instanceTypes) {
                    logger.info("The memory information of this type is " + type.memoryInfo().sizeInMiB());
                    logger.info("Network information is " + type.networkInfo().toString());
                    logger.info("Instance type is " + type.instanceType().toString());
                }
            } else {
                throw (RuntimeException) ex;
            }
        });

        return response.thenApply(resp -> {
            for (InstanceTypeInfo type : resp.instanceTypes()) {
                String instanceType = type.instanceType().toString();
                if (instanceType.equals("t2.2xlarge")) {
                    return instanceType;
                }
            }
            return "";
        });
    }

import { EC2Client, paginateDescribeInstanceTypes } from "@aws-sdk/client-ec2";

/**
 * Describes the specified instance types. By default, all instance types for the
 * current Region are described. Alternatively, you can filter the results.
 * @param {{ pageSize: string, supportedArch: string[], freeTier: boolean }} options
 */
export const main = async ({ pageSize, supportedArch, freeTier }) => {
  pageSize = Number.parseInt(pageSize);
  const client = new EC2Client({});

  // The paginate function is a wrapper around the underlying command.
  const paginator = paginateDescribeInstanceTypes(
    // Without limiting the page size, this call can take a long time. pageSize is just sugar for
    // the MaxResults property in the underlying command.
    { client, pageSize },
    {
      Filters: [
        {
          Name: "processor-info.supported-architecture",
          Values: supportedArch,
        },
        { Name: "free-tier-eligible", Values: [freeTier ? "true" : "false"] },
      ],
    },
  );

  try {
    /**
     * @type {import('@aws-sdk/client-ec2').InstanceTypeInfo[]}
     */
    const instanceTypes = [];

    for await (const page of paginator) {
      if (page.InstanceTypes.length) {
        instanceTypes.push(...page.InstanceTypes);

        // When we have at least 1 result, we can stop.
        if (instanceTypes.length >= 1) {
          break;
        }
      }
    }
    console.log(
      `Memory size in MiB for matching instance types:\n\n${instanceTypes.map((it) => `${it.InstanceType}: ${it.MemoryInfo.SizeInMiB} MiB`).join("\n")}`,
    );
  } catch (caught) {
    if (caught instanceof Error && caught.name === "InvalidParameterValue") {
      console.warn(`${caught.message}`);
      return [];
    }
    throw caught;
  }
};

// Get a list of instance types.
suspend fun getInstanceTypesSc(): String {
    var instanceType = ""
    val filterObs = ArrayList<Filter>()
    val filter =
        Filter {
            name = "processor-info.supported-architecture"
            values = listOf("arm64")
        }

    filterObs.add(filter)
    val typesRequest =
        DescribeInstanceTypesRequest {
            filters = filterObs
            maxResults = 10
        }
    Ec2Client { region = "us-west-2" }.use { ec2 ->
        val response = ec2.describeInstanceTypes(typesRequest)
        response.instanceTypes?.forEach { type ->
            println("The memory information of this type is ${type.memoryInfo?.sizeInMib}")
            println("Maximum number of network cards is ${type.networkInfo?.maximumNetworkCards}")
            instanceType = type.instanceType.toString()
        }
        return instanceType
    }
}

class EC2InstanceWrapper:
    """Encapsulates Amazon Elastic Compute Cloud (Amazon EC2) instance actions using the client interface."""

    def __init__(
        self, ec2_client: Any, instances: Optional[List[Dict[str, Any]]] = None
    ) -> None:
        """
        Initializes the EC2InstanceWrapper with an EC2 client and optional instances.

        :param ec2_client: A Boto3 Amazon EC2 client. This client provides low-level
                           access to AWS EC2 services.
        :param instances: A list of dictionaries representing Boto3 Instance objects. These are high-level objects that
                          wrap instance actions.
        """
        self.ec2_client = ec2_client
        self.instances = instances or []

    @classmethod
    def from_client(cls) -> "EC2InstanceWrapper":
        """
        Creates an EC2InstanceWrapper instance with a default EC2 client.

        :return: An instance of EC2InstanceWrapper initialized with the default EC2 client.
        """
        ec2_client = boto3.client("ec2")
        return cls(ec2_client)


    def get_instance_types(
        self, architecture: str = "x86_64", sizes: List[str] = ["*.micro", "*.small"]
    ) -> List[Dict[str, Any]]:
        """
        Gets instance types that support the specified architecture and size.
        See https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInstanceTypes.html
        for a list of allowable parameters.

        :param architecture: The architecture supported by instance types. Default: 'x86_64'.
        :param sizes: The size of instance types. Default: '*.micro', '*.small',
        :return: A list of dictionaries representing instance types that support the specified architecture and size.
        """
        try:
            inst_types = []
            paginator = self.ec2_client.get_paginator("describe_instance_types")
            for page in paginator.paginate(
                Filters=[
                    {
                        "Name": "processor-info.supported-architecture",
                        "Values": [architecture],
                    },
                    {"Name": "instance-type", "Values": sizes},
                ]
            ):
                inst_types += page["InstanceTypes"]
        except ClientError as err:
            logger.error(
                f"Failed to get instance types: {architecture}, {','.join(map(str, sizes))}"
            )
            error_code = err.response["Error"]["Code"]
            if error_code == "InvalidParameterValue":
                logger.error(
                    "Parameters are invalid. "
                    "Ensure architecture and size strings conform to DescribeInstanceTypes API reference."
                )
            raise
        else:
            return inst_types

    /// List instance types that match an image's architecture and are free tier eligible.
    pub async fn list_instance_types(&self, image: &Image) -> Result<Vec<InstanceType>, EC2Error> {
        let architecture = format!(
            "{}",
            image.architecture().ok_or_else(|| EC2Error::new(format!(
                "Image {:?} does not have a listed architecture",
                image.image_id()
            )))?
        );
        let free_tier_eligible_filter = Filter::builder()
            .name("free-tier-eligible")
            .values("false")
            .build();
        let supported_architecture_filter = Filter::builder()
            .name("processor-info.supported-architecture")
            .values(architecture)
            .build();
        let response = self
            .client
            .describe_instance_types()
            .filters(free_tier_eligible_filter)
            .filters(supported_architecture_filter)
            .send()
            .await?;

        Ok(response
            .instance_types
            .unwrap_or_default()
            .into_iter()
            .filter_map(|iti| iti.instance_type)
            .collect())
    }