Add compute tutorials (batch 5)

Author: mwunderl

tuts/184-ec2-ebs-volume-types/ec2-ebs-types.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing EBS volume types"
+echo "  gp3: General Purpose SSD (default)"
+echo "  gp2: Previous gen General Purpose SSD"
+echo "  io2: Provisioned IOPS SSD"
+echo "  st1: Throughput Optimized HDD"
+echo "  sc1: Cold HDD"
+echo "Step 2: Listing your volumes by type"
+aws ec2 describe-volumes --query "Volumes[].{Id:VolumeId,Type:VolumeType,Size:Size,State:State,IOPS:Iops}" --output table 2>/dev/null || echo "  No volumes"
+echo "Step 3: Describing volume modifications"
+aws ec2 describe-volumes-modifications --query "VolumesModifications[:5].{Id:VolumeId,Status:ModificationState,OrigType:OriginalVolumeType,TargetType:TargetVolumeType}" --output table 2>/dev/null || echo "  No modifications"
+echo ""; echo "Tutorial complete. No resources created — read-only."
+rm -rf "$WORK_DIR"

tuts/185-lambda-dead-letter-queue/lambda-dead-letter.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+RANDOM_ID=$(openssl rand -hex 4); F="dlq-func-${RANDOM_ID}"; R="dlq-func-role-${RANDOM_ID}"; Q="dlq-func-q-${RANDOM_ID}"
+handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
+cleanup() { echo "Cleaning up..."; aws lambda delete-function --function-name "$F" 2>/dev/null; [ -n "$QU" ] && aws sqs delete-queue --queue-url "$QU" 2>/dev/null; aws iam detach-role-policy --role-name "$R" --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole 2>/dev/null; aws iam detach-role-policy --role-name "$R" --policy-arn arn:aws:iam::aws:policy/AmazonSQSFullAccess 2>/dev/null; aws iam delete-role --role-name "$R" 2>/dev/null; rm -rf "$WORK_DIR"; echo "Done."; }
+RA=$(aws iam create-role --role-name "$R" --assume-role-policy-document '{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Principal":{"Service":"lambda.amazonaws.com"},"Action":"sts:AssumeRole"}]}' --query Role.Arn --output text)
+aws iam attach-role-policy --role-name "$R" --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
+aws iam attach-role-policy --role-name "$R" --policy-arn arn:aws:iam::aws:policy/AmazonSQSFullAccess; sleep 10
+QU=$(aws sqs create-queue --queue-name "$Q" --query QueueUrl --output text)
+QA=$(aws sqs get-queue-attributes --queue-url "$QU" --attribute-names QueueArn --query Attributes.QueueArn --output text)
+echo "Step 1: Creating function that always fails"
+echo "def handler(e,c): raise Exception('Intentional failure')" > "$WORK_DIR/i.py"
+(cd "$WORK_DIR" && zip f.zip i.py > /dev/null)
+aws lambda create-function --function-name "$F" --zip-file "fileb://$WORK_DIR/f.zip" --handler i.handler --runtime python3.12 --role "$RA" --dead-letter-config "{\"TargetArn\":\"$QA\"}" --architectures x86_64 > /dev/null
+aws lambda wait function-active-v2 --function-name "$F"
+echo "  Function with DLQ configured"
+echo "Step 2: Invoking async (will fail and go to DLQ)"
+aws lambda invoke --function-name "$F" --invocation-type Event --cli-binary-format raw-in-base64-out --payload '{}' "$WORK_DIR/out.json" > /dev/null
+echo "  Invoked async — Lambda will retry twice then send to DLQ"
+echo "Step 3: Checking DLQ (after retries, ~3 min)"
+echo "  DLQ messages: $(aws sqs get-queue-attributes --queue-url "$QU" --attribute-names ApproximateNumberOfMessages --query Attributes.ApproximateNumberOfMessages --output text)"
+echo "  (Message will appear after Lambda exhausts retries)"
+echo ""; echo "Tutorial complete."
+echo "Do you want to clean up? (y/n): "; read -r C; [[ "$C" =~ ^[Yy]$ ]] && cleanup

tuts/187-ec2-instance-types/ec2-instance-types.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing instance type families"
+aws ec2 describe-instance-types --filters "Name=instance-type,Values=t3.*" --query 'InstanceTypes[].{Type:InstanceType,vCPUs:VCpuInfo.DefaultVCpus,Memory:MemoryInfo.SizeInMiB}' --output table
+echo "Step 2: Describing a specific type"
+aws ec2 describe-instance-types --instance-types t3.micro --query 'InstanceTypes[0].{Type:InstanceType,vCPUs:VCpuInfo.DefaultVCpus,Memory:MemoryInfo.SizeInMiB,Network:NetworkInfo.NetworkPerformance,Arch:ProcessorInfo.SupportedArchitectures}' --output table
+echo "Step 3: Finding instances by criteria"
+aws ec2 describe-instance-types --filters "Name=vcpu-info.default-vcpus,Values=2" "Name=memory-info.size-in-mib,Values=4096" --query 'InstanceTypes[:5].{Type:InstanceType,vCPUs:VCpuInfo.DefaultVCpus,Memory:MemoryInfo.SizeInMiB}' --output table
+echo ""; echo "Tutorial complete. No resources created — read-only."
+rm -rf "$WORK_DIR"

tuts/192-lambda-runtimes-and-quotas/lambda-container.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Listing Lambda runtimes"
+aws lambda list-layers --compatible-runtime python3.12 --query 'Layers[:5].{Name:LayerName,Version:LatestMatchingVersion.Version}' --output table 2>/dev/null || echo "  No compatible layers"
+echo "Step 2: Getting Lambda service quotas"
+aws lambda get-account-settings --query 'AccountLimit.{CodeSize:TotalCodeSize,ConcurrentExec:ConcurrentExecutions,FunctionCount:FunctionCount}' --output table
+echo "Step 3: Listing functions by runtime"
+aws lambda list-functions --query 'Functions[?Runtime==`python3.12`][:5].{Name:FunctionName,Runtime:Runtime,Size:CodeSize}' --output table 2>/dev/null || echo "  No Python 3.12 functions"
+echo "Step 4: Listing event source mappings"
+aws lambda list-event-source-mappings --query 'EventSourceMappings[:5].{Function:FunctionArn,Source:EventSourceArn,State:State}' --output table 2>/dev/null || echo "  No event source mappings"
+echo ""; echo "Tutorial complete. No resources created — read-only."
+rm -rf "$WORK_DIR"

tuts/193-ec2-regions-and-zones/ec2-metadata.sh

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+#!/bin/bash
+WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/tut.log") 2>&1
+REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+echo "Step 1: Describing your running instances"
+aws ec2 describe-instances --filters "Name=instance-state-name,Values=running" --query 'Reservations[].Instances[:3].{Id:InstanceId,Type:InstanceType,State:State.Name,AZ:Placement.AvailabilityZone}' --output table 2>/dev/null || echo "  No running instances"
+echo "Step 2: Describing instance status"
+aws ec2 describe-instance-status --query 'InstanceStatuses[:3].{Id:InstanceId,System:SystemStatus.Status,Instance:InstanceStatus.Status}' --output table 2>/dev/null || echo "  No instance status"
+echo "Step 3: Listing regions"
+aws ec2 describe-regions --query 'Regions[:10].{Name:RegionName,Endpoint:Endpoint}' --output table
+echo "Step 4: Listing availability zones"
+aws ec2 describe-availability-zones --query 'AvailabilityZones[:5].{Zone:ZoneName,State:State,Type:ZoneType}' --output table
+echo ""; echo "Tutorial complete. No resources created — read-only."
+rm -rf "$WORK_DIR"