Get all IP Addresses assigned to an EC2 Instance - powershell

Question

The function below as well as others that I have in the script to collect a complete inventory of everything we have in AWS, runs without any problems.
However, I am missing all of the IP addresses that are assigned to the instance after the first one when the instance has more than one interface.
How can I make sure to get all the ip addresses of every instance in the function below before writing the details into the excel worksheet?
function Create-EC2InstanceWorksheet {
#Creating EC2 Instances Worksheet
# Add Excel worksheet
$workbook.Worksheets.Add()
# We need to create a sheet for the Instances
$InstancesWorksheet = $workbook.Worksheets.Item(1)
$InstancesWorksheet.Name = 'Instances'
# Headers for the Instance worksheet
$InstancesWorksheet.Cells.Item(1,1) = 'Region'
$InstancesWorksheet.Cells.Item(1,2) = 'Instance Name'
$InstancesWorksheet.Cells.Item(1,3) = 'Image ID'
$InstancesWorksheet.Cells.Item(1,4) = 'Instance ID'
$InstancesWorksheet.Cells.Item(1,5) = 'PEM File'
$InstancesWorksheet.Cells.Item(1,6) = 'Instance Type'
$InstancesWorksheet.Cells.Item(1,7) = 'Private IP'
$InstancesWorksheet.Cells.Item(1,8) = 'Public IP'
$InstancesWorksheet.Cells.Item(1,9) = 'VPC ID'
$InstancesWorksheet.Cells.Item(1,10) = 'Subnet ID'
$InstancesWorksheet.Cells.Item(1,11) = 'State'
$InstancesWorksheet.Cells.Item(1,12) = 'Security Group Id'
$InstancesWorksheet.Cells.Item(1,13) = 'Source/Dest Check'
# Excel Cell Counter
$row_counter = 3
$column_counter = 1
# Get the Ec2 instances for each region
foreach($AWS_Locations_Iterator in $AWS_Locations){
$EC2Instances = Get-EC2Instance -Region $AWS_Locations_Iterator
# Iterating over each instance
foreach($EC2Instances_Iterator.Instances.NetworkInterfaces.PrivateIpAddresses.PrivateIpAddress in $EC2Instances){
foreach($EC2Instances_Iterator.Instances.NetworkInterfaces.Pr ...
+ ~
Missing 'in' after variable in foreach loop.
Remove the code above starting at foreach and used the suggestion provided by #AnthonyNeace. Replaced with the foreach below which does provide the additional ip addresses.
foreach($instance in $EC2Instances.Instances){
foreach($networkInterface in $instance.NetworkInterfaces){
"$($instance.InstanceID): $($networkInterface.PrivateIpAddresses.PrivateIpAddress)";
# Ignore if a region does not have any instances
if($EC2Instances_Iterator.count -eq $null) {
continue
}
# Populating the cells
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $AWS_Locations_Iterator
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.Tags.value
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.imageid
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.Instanceid
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.keyname.tostring()
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.Instancetype.Value
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.PrivateIpAddress
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.PublicIpAddress
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.VpcId
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.SubnetId
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.state.name.value
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.securitygroups.GroupId
$InstancesWorksheet.Cells.Item($row_counter,$column_counter++) = $EC2Instances_Iterator.Instances.SourceDestCheck
# Seting the row and column counter for next EC2 instance entry
$row_counter = $row_counter + 1
$column_counter = 1
}
# Iterating to the next region
$row_counter = $row_counter + 1
}
}

Answer 1

The network interface is included with each EC2 Instance in the Get-EC2Instance response, so taking the private ip addresses as an example... you could access the private IP addresses by simply iterating over each private ip address exposed on each network interface. Same for the IPv6 addresses.
Object Model
Amazon.EC2.Model.Instance
System.Collections.Generic.List<Amazon.EC2.Model.InstanceNetworkInterface>
System.Collections.Generic.List<Amazon.EC2.Model.InstancePrivateIpAddress>
PrivateIpAddress
System.Collections.Generic.List<Amazon.EC2.Model.InstanceIpv6Address>
Ipv6Address
IPv4 Example
$EC2Instances_Iterator.Instances.NetworkInterfaces.PrivateIpAddresses.PrivateIpAddress
IPv6 Example
$EC2Instances_Iterator.Instances.NetworkInterfaces.Ipv6Addresses.Ipv6Address
Example: Write addresses string using foreach loop
This example builds the addresses across each network interface into a comma-delimited string within the scope of the instances loop. So a string is created for each instance.
The powershell subexpression operator $() is used to resolve complex properties in the string.
$EC2Instances = Get-EC2Instance
foreach($instance in $EC2Instances.Instances){
$addresses = "";
foreach($networkInterface in $instance.NetworkInterfaces){
$addresses = $addresses, $networkInterface.PrivateIpAddresses.PrivateIpAddress -join ","
}
"$($instance.InstanceID): $($addresses.Trim(','))"
}
Further Reading
AWS Documentation - Get-EC2Instance