There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Code examples for VPC Lattice using AWS SDKs
<a name="vpc-lattice_code_examples"></a>

The following code examples show you how to use Amazon VPC Lattice with an AWS software development kit (SDK).

*Scenarios* are code examples that show you how to accomplish specific tasks by calling multiple functions within a service or combined with other AWS services.

**More resources**
+  **[ VPC Lattice Developer Guide](https://docs.aws.amazon.com/vpc-lattice/latest/ug/what-is-vpc-lattice.html)** – More information about VPC Lattice.
+ **[VPC Lattice API Reference](https://docs.aws.amazon.com/vpc-lattice/latest/APIReference/Welcome.html)** – Details about all available VPC Lattice actions.
+ **[AWS Developer Center](https://aws.amazon.com/developer/code-examples/?awsf.sdk-code-examples-product=product%23)** – Code examples that you can filter by category or full-text search.
+ **[AWS SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples)** – GitHub repo with complete code in preferred languages. Includes instructions for setting up and running the code.

**Contents**
+ [Scenarios](vpc-lattice_code_examples_scenarios.md)
  + [Creating and managing a VPC Lattice service network](vpc-lattice_example_vpc_lattice_GettingStarted_055_section.md)

# Scenarios for VPC Lattice using AWS SDKs
<a name="vpc-lattice_code_examples_scenarios"></a>

The following code examples show you how to implement common scenarios in VPC Lattice with AWS SDKs. These scenarios show you how to accomplish specific tasks by calling multiple functions within VPC Lattice or combined with other AWS services. Each scenario includes a link to the complete source code, where you can find instructions on how to set up and run the code. 

Scenarios target an intermediate level of experience to help you understand service actions in context.

**Topics**
+ [Creating and managing a VPC Lattice service network](vpc-lattice_example_vpc_lattice_GettingStarted_055_section.md)

# Creating and managing a VPC Lattice service network
<a name="vpc-lattice_example_vpc_lattice_GettingStarted_055_section"></a>

The following code example shows how to:
+ Create a service network
+ Create a service
+ List available VPCs
+ List security groups for the selected VPC
+ List service associations
+ List VPC associations
+ Clean up resources

------
#### [ Bash ]

**AWS CLI with Bash script**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [Sample developer tutorials](https://github.com/aws-samples/sample-developer-tutorials/tree/main/tuts/055-amazon-vpc-lattice-gs) repository. 

```
#!/bin/bash

# VPC Lattice Service Network Tutorial Script
# This script demonstrates how to create and manage a VPC Lattice service network

# Set up logging
LOG_FILE="vpc-lattice-tutorial.log"
echo "Starting VPC Lattice tutorial script at $(date)" > $LOG_FILE

# Function to log commands and their output
log_command() {
    echo "$(date): Running command: $1" >> $LOG_FILE
    eval "$1" 2>&1 | tee -a $LOG_FILE
    return ${PIPESTATUS[0]}
}

# Function to check for errors
check_error() {
    if [ $1 -ne 0 ]; then
        echo "ERROR: Command failed with exit code $1" | tee -a $LOG_FILE
        echo "See $LOG_FILE for details"
        exit $1
    fi
}

# Function to wait for a resource to be in the desired state
wait_for_resource() {
    local resource_type=$1
    local resource_id=$2
    local desired_status=$3
    local command=$4
    local max_attempts=30
    local attempt=1
    local status=""

    echo "Waiting for $resource_type $resource_id to be in state $desired_status..." | tee -a $LOG_FILE
    
    while [ $attempt -le $max_attempts ]; do
        echo "Attempt $attempt of $max_attempts..." >> $LOG_FILE
        
        # Run the command to get the status and capture the output
        status_output=$(eval "$command")
        echo "$status_output" >> $LOG_FILE
        
        # For service networks, they don't have a status field in the output
        # We'll consider them active if we can retrieve them
        if [[ "$resource_type" == "Service Network" ]]; then
            if [[ "$status_output" == *"$resource_id"* ]]; then
                echo "$resource_type $resource_id is now active" | tee -a $LOG_FILE
                return 0
            fi
        else
            # For other resources, extract the status field
            status=$(echo "$status_output" | grep -i "status" | awk -F'"' '{print $4}')
            echo "Current status: $status" >> $LOG_FILE
            
            if [[ "$status" == "$desired_status" ]]; then
                echo "$resource_type $resource_id is now in state $desired_status" | tee -a $LOG_FILE
                return 0
            elif [[ "$status" == *"FAIL"* ]]; then
                echo "ERROR: $resource_type $resource_id failed to reach desired state. Current status: $status" | tee -a $LOG_FILE
                return 1
            fi
        fi
        
        echo "Waiting for status change... (attempt $attempt/$max_attempts)" >> $LOG_FILE
        sleep 10
        ((attempt++))
    done
    
    echo "ERROR: Timed out waiting for $resource_type $resource_id to reach state $desired_status" | tee -a $LOG_FILE
    return 1
}

# Generate a random identifier for resource names
RANDOM_ID=$(openssl rand -hex 4)
SERVICE_NETWORK_NAME="lattice-network-${RANDOM_ID}"
SERVICE_NAME="lattice-service-${RANDOM_ID}"

# Store created resources for cleanup
CREATED_RESOURCES=()

echo "=== VPC Lattice Service Network Tutorial ===" | tee -a $LOG_FILE
echo "Random ID for this session: ${RANDOM_ID}" | tee -a $LOG_FILE

# Step 1: Create a VPC Lattice service network
echo -e "\n=== Step 1: Creating a VPC Lattice service network ===" | tee -a $LOG_FILE
echo "Creating service network: $SERVICE_NETWORK_NAME" | tee -a $LOG_FILE

SERVICE_NETWORK_OUTPUT=$(log_command "aws vpc-lattice create-service-network --name $SERVICE_NETWORK_NAME")
check_error $?

# Extract the service network ID
SERVICE_NETWORK_ID=$(echo "$SERVICE_NETWORK_OUTPUT" | grep -o '"id": "[^"]*' | cut -d'"' -f4)
if [ -z "$SERVICE_NETWORK_ID" ]; then
    echo "ERROR: Failed to extract service network ID" | tee -a $LOG_FILE
    exit 1
fi

echo "Service network created with ID: $SERVICE_NETWORK_ID" | tee -a $LOG_FILE
CREATED_RESOURCES+=("Service Network: $SERVICE_NETWORK_ID")

# Wait for the service network to be active
wait_for_resource "Service Network" "$SERVICE_NETWORK_ID" "ACTIVE" "aws vpc-lattice get-service-network --service-network-identifier $SERVICE_NETWORK_ID"
check_error $?

# Step 2: Create a VPC Lattice service
echo -e "\n=== Step 2: Creating a VPC Lattice service ===" | tee -a $LOG_FILE
echo "Creating service: $SERVICE_NAME" | tee -a $LOG_FILE

SERVICE_OUTPUT=$(log_command "aws vpc-lattice create-service --name $SERVICE_NAME")
check_error $?

# Extract the service ID
SERVICE_ID=$(echo "$SERVICE_OUTPUT" | grep -o '"id": "[^"]*' | cut -d'"' -f4)
if [ -z "$SERVICE_ID" ]; then
    echo "ERROR: Failed to extract service ID" | tee -a $LOG_FILE
    exit 1
fi

echo "Service created with ID: $SERVICE_ID" | tee -a $LOG_FILE
CREATED_RESOURCES+=("Service: $SERVICE_ID")

# Wait for the service to be active
wait_for_resource "Service" "$SERVICE_ID" "ACTIVE" "aws vpc-lattice get-service --service-identifier $SERVICE_ID"
check_error $?

# Step 3: Associate the service with the service network
echo -e "\n=== Step 3: Associating service with service network ===" | tee -a $LOG_FILE

SERVICE_ASSOC_OUTPUT=$(log_command "aws vpc-lattice create-service-network-service-association --service-identifier $SERVICE_ID --service-network-identifier $SERVICE_NETWORK_ID")
check_error $?

# Extract the service association ID
SERVICE_ASSOC_ID=$(echo "$SERVICE_ASSOC_OUTPUT" | grep -o '"id": "[^"]*' | cut -d'"' -f4)
if [ -z "$SERVICE_ASSOC_ID" ]; then
    echo "ERROR: Failed to extract service association ID" | tee -a $LOG_FILE
    exit 1
fi

echo "Service association created with ID: $SERVICE_ASSOC_ID" | tee -a $LOG_FILE
CREATED_RESOURCES+=("Service Association: $SERVICE_ASSOC_ID")

# Wait for the service association to be active
wait_for_resource "Service Association" "$SERVICE_ASSOC_ID" "ACTIVE" "aws vpc-lattice get-service-network-service-association --service-network-service-association-identifier $SERVICE_ASSOC_ID"
check_error $?

# Step 4: List available VPCs to associate with the service network
echo -e "\n=== Step 4: Listing available VPCs ===" | tee -a $LOG_FILE

VPC_LIST=$(log_command "aws ec2 describe-vpcs --query 'Vpcs[*].[VpcId,Tags[?Key==\`Name\`].Value|[0]]' --output text")
check_error $?

echo "Available VPCs:" | tee -a $LOG_FILE
echo "$VPC_LIST" | tee -a $LOG_FILE

# Step 5: Prompt user to select a VPC to associate
echo -e "\n=== Step 5: Associate a VPC with the service network ===" | tee -a $LOG_FILE
echo ""
echo "==========================================="
echo "VPC SELECTION"
echo "==========================================="
echo "Please enter the VPC ID you want to associate with the service network:"
read -r VPC_ID

if [ -z "$VPC_ID" ]; then
    echo "ERROR: No VPC ID provided" | tee -a $LOG_FILE
    echo "Skipping VPC association step" | tee -a $LOG_FILE
else
    # Step 6: List security groups for the selected VPC
    echo -e "\n=== Step 6: Listing security groups for VPC $VPC_ID ===" | tee -a $LOG_FILE
    
    SG_LIST=$(log_command "aws ec2 describe-security-groups --filters Name=vpc-id,Values=$VPC_ID --query 'SecurityGroups[*].[GroupId,GroupName]' --output text")
    check_error $?
    
    echo "Available Security Groups for VPC $VPC_ID:" | tee -a $LOG_FILE
    echo "$SG_LIST" | tee -a $LOG_FILE
    
    # Step 7: Prompt user to select a security group
    echo -e "\n=== Step 7: Select a security group for the VPC association ===" | tee -a $LOG_FILE
    echo ""
    echo "==========================================="
    echo "SECURITY GROUP SELECTION"
    echo "==========================================="
    echo "Please enter the Security Group ID you want to use for the VPC association:"
    read -r SG_ID
    
    if [ -z "$SG_ID" ]; then
        echo "ERROR: No Security Group ID provided" | tee -a $LOG_FILE
        echo "Skipping VPC association step" | tee -a $LOG_FILE
    else
        # Step 8: Associate the VPC with the service network
        echo -e "\n=== Step 8: Associating VPC with service network ===" | tee -a $LOG_FILE
        
        VPC_ASSOC_OUTPUT=$(log_command "aws vpc-lattice create-service-network-vpc-association --vpc-identifier $VPC_ID --service-network-identifier $SERVICE_NETWORK_ID --security-group-ids $SG_ID")
        check_error $?
        
        # Extract the VPC association ID
        VPC_ASSOC_ID=$(echo "$VPC_ASSOC_OUTPUT" | grep -o '"id": "[^"]*' | cut -d'"' -f4)
        if [ -z "$VPC_ASSOC_ID" ]; then
            echo "ERROR: Failed to extract VPC association ID" | tee -a $LOG_FILE
        else
            echo "VPC association created with ID: $VPC_ASSOC_ID" | tee -a $LOG_FILE
            CREATED_RESOURCES+=("VPC Association: $VPC_ASSOC_ID")
            
            # Wait for the VPC association to be active
            wait_for_resource "VPC Association" "$VPC_ASSOC_ID" "ACTIVE" "aws vpc-lattice get-service-network-vpc-association --service-network-vpc-association-identifier $VPC_ASSOC_ID"
            check_error $?
        fi
    fi
fi

# Step 9: Display information about the created resources
echo -e "\n=== Step 9: Displaying information about created resources ===" | tee -a $LOG_FILE

echo "Service Network Details:" | tee -a $LOG_FILE
log_command "aws vpc-lattice get-service-network --service-network-identifier $SERVICE_NETWORK_ID"

echo "Service Details:" | tee -a $LOG_FILE
log_command "aws vpc-lattice get-service --service-identifier $SERVICE_ID"

echo "Service Network Service Associations:" | tee -a $LOG_FILE
log_command "aws vpc-lattice list-service-network-service-associations --service-network-identifier $SERVICE_NETWORK_ID"

echo "Service Network VPC Associations:" | tee -a $LOG_FILE
log_command "aws vpc-lattice list-service-network-vpc-associations --service-network-identifier $SERVICE_NETWORK_ID"

# Step 10: Cleanup confirmation
echo -e "\n=== Step 10: Resource Cleanup ===" | tee -a $LOG_FILE
echo "Resources created in this tutorial:" | tee -a $LOG_FILE
for resource in "${CREATED_RESOURCES[@]}"; do
    echo "- $resource" | tee -a $LOG_FILE
done

echo ""
echo "==========================================="
echo "CLEANUP CONFIRMATION"
echo "==========================================="
echo "Do you want to clean up all created resources? (y/n): "
read -r CLEANUP_CHOICE

if [[ "$CLEANUP_CHOICE" =~ ^[Yy]$ ]]; then
    echo "Starting cleanup process..." | tee -a $LOG_FILE
    
    # Delete resources in reverse order
    
    # Delete VPC association if it was created
    if [[ -n "$VPC_ASSOC_ID" ]]; then
        echo "Deleting VPC association: $VPC_ASSOC_ID" | tee -a $LOG_FILE
        log_command "aws vpc-lattice delete-service-network-vpc-association --service-network-vpc-association-identifier $VPC_ASSOC_ID"
        
        # Wait for the VPC association to be deleted
        echo "Waiting for VPC association to be deleted..." | tee -a $LOG_FILE
        sleep 30
    fi
    
    # Delete service association
    echo "Deleting service association: $SERVICE_ASSOC_ID" | tee -a $LOG_FILE
    log_command "aws vpc-lattice delete-service-network-service-association --service-network-service-association-identifier $SERVICE_ASSOC_ID"
    
    # Wait for the service association to be deleted
    echo "Waiting for service association to be deleted..." | tee -a $LOG_FILE
    sleep 30
    
    # Delete service
    echo "Deleting service: $SERVICE_ID" | tee -a $LOG_FILE
    log_command "aws vpc-lattice delete-service --service-identifier $SERVICE_ID"
    
    # Wait for the service to be deleted
    echo "Waiting for service to be deleted..." | tee -a $LOG_FILE
    sleep 30
    
    # Delete service network
    echo "Deleting service network: $SERVICE_NETWORK_ID" | tee -a $LOG_FILE
    log_command "aws vpc-lattice delete-service-network --service-network-identifier $SERVICE_NETWORK_ID"
    
    echo "Cleanup completed successfully!" | tee -a $LOG_FILE
else
    echo "Skipping cleanup. Resources will remain in your account." | tee -a $LOG_FILE
    echo "To clean up resources later, use the AWS CLI or console." | tee -a $LOG_FILE
fi

echo -e "\n=== Tutorial completed! ===" | tee -a $LOG_FILE
echo "Log file: $LOG_FILE" | tee -a $LOG_FILE
```
+ For API details, see the following topics in *AWS CLI Command Reference*.
  + [CreateService](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/CreateService)
  + [CreateServiceNetwork](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/CreateServiceNetwork)
  + [CreateServiceNetworkServiceAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/CreateServiceNetworkServiceAssociation)
  + [CreateServiceNetworkVpcAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/CreateServiceNetworkVpcAssociation)
  + [DeleteService](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/DeleteService)
  + [DeleteServiceNetwork](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/DeleteServiceNetwork)
  + [DeleteServiceNetworkServiceAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/DeleteServiceNetworkServiceAssociation)
  + [DeleteServiceNetworkVpcAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/DeleteServiceNetworkVpcAssociation)
  + [DescribeSecurityGroups](https://docs.aws.amazon.com/goto/aws-cli/ec2-2016-11-15/DescribeSecurityGroups)
  + [DescribeVpcs](https://docs.aws.amazon.com/goto/aws-cli/ec2-2016-11-15/DescribeVpcs)
  + [GetService](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/GetService)
  + [GetServiceNetwork](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/GetServiceNetwork)
  + [GetServiceNetworkServiceAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/GetServiceNetworkServiceAssociation)
  + [GetServiceNetworkVpcAssociation](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/GetServiceNetworkVpcAssociation)
  + [ListServiceNetworkServiceAssociations](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/ListServiceNetworkServiceAssociations)
  + [ListServiceNetworkVpcAssociations](https://docs.aws.amazon.com/goto/aws-cli/vpc-lattice-2022-11-30/ListServiceNetworkVpcAssociations)

------