Testing latency between regions.

ec2-ping-test.sh

#!/bin/bash
#
# Usage:
#
#   1. Set SECURITY_GROUP and KEY_NAME to your value
#   2. source ec2-ping-test.sh
#   3. launch_all_instances
#   4. terminate_all_instances
#

AWS_REGIONS=(
    'us-east-1'
    'us-west-1'
    'us-west-2'
    'eu-west-1'
    'eu-central-1'
    'ap-northeast-1'
    'ap-northeast-2'
    'ap-southeast-1'
    'ap-southeast-2'
    'sa-east-1'
)

# 099720109477/ubuntu/images/hvm-ssd/ubuntu-xenial-16.04-amd64-server-20160420.3
AWS_AMIS=(
    'ami-840910ee'
    'ami-d8e996b8'
    'ami-fa82739a'
    'ami-3079f543'
    'ami-f0eb089f'
    'ami-3c5f4152'
    'ami-ea488084'
    'ami-fbe83c98'
    'ami-a5416cc6'
    'ami-567cf23a'
)

# Set these to YOUR values before running the test.
INSTANCE_TYPE="YOUR CHOICE OF INSTANCE TYPE"
SECURITY_GROUP="YOUR SECURITY GROUP NAME"
KEY_NAME="YOUR KEYPAIR NAME"

# This tag is for finding and terminating all instances. 
TAG_KEY=Name
TAG_VALUE=aws-inter-region-latency-test

function get_zone_name() {
    local region=$1
    
    aws ec2 describe-availability-zones \
        --region $region \
        --query AvailabilityZones[0].ZoneName \
        --output text
}

function run_instance() {
    local region=$1
    local ami=$2
    
    local params="
        --region $region
        --security-groups $SECURITY_GROUP
        --image-id $ami
        --instance-type $INSTANCE_TYPE
        --key-name $KEY_NAME
        --output json
        "
        
    local output=$(aws ec2 run-instances $params)
    
    local instance_id=$(echo "$output" | jq .Instances[0].InstanceId -r)
    echo $instance_id
}

function terminate_instances() {
    local region=$1
    local key=$2
    local value=$3
    
    local params="
        --region $region
        --filters
            "Name=instance-state-name,Values=running"
            "Name=tag:$key,Values=$value"
        --output json
        "
    
    local output=$(aws ec2 describe-instances $params)
        
    local instance_ids=$(echo "$output" | jq .Reservations[].Instances[].InstanceId -r)

    # use sed to trim spaces
    local count=$(echo $instance_ids | wc -w | sed -e 's/^[ \t]*//')

    if [ "$count" -gt "0" ]
    then
        echo "The following instances will be terminated:"
        for i in $instance_ids;
        do
            echo -e "\033[92m$i\033[0m"
        done
        echo "Terminating $count instances."

        output=$(aws ec2 terminate-instances \
            --region $region \
            --instance-ids $instance_ids \
            --output json)
    else
        echo "No instance to be terminated."
    fi
}

function tag_instance() {
    local region=$1
    local instance_id=$2
    local key=$3
    local value=$4
    
    local params="
        --region $region
        --resources $instance_id
        --tags
            Key=$key,Value=$value
        "
    
    aws ec2 create-tags $params
}

function launch_all_instances() {
    for i in "${!AWS_REGIONS[@]}"; do
        local region=${AWS_REGIONS[$i]}
        local ami=${AWS_AMIS[$i]}
        echo -e "Launching EC2 in \033[92m$region\033[0m region with AMI \033[92m$ami\033[0m ..."
        local instance_id=$(run_instance $region $ami)
        echo -e "Instance \033[92m$instance_id\033[0m launched."
        echo "Tagging the instance ..."
        tag_instance $region $instance_id $TAG_KEY $TAG_VALUE
        echo "Instance tagged successfully."
    done
}

function terminate_all_instances() {
    for i in "${!AWS_REGIONS[@]}"; do
        local region=${AWS_REGIONS[$i]}
        local ami=${AWS_AMIS[$i]}
        echo -e "Finding EC2 to terminate in \033[92m$region\033[0m region ..."
        terminate_instances $region $TAG_KEY $TAG_VALUE
    done
}

ping-all.sh

EC2_INSTANCES=(
    'ec2-54-210-101-4.compute-1.amazonaws.com'
    'ec2-52-53-201-114.us-west-1.compute.amazonaws.com'
    'ec2-52-36-149-26.us-west-2.compute.amazonaws.com'
    'ec2-52-51-100-72.eu-west-1.compute.amazonaws.com'
    'ec2-52-58-166-120.eu-central-1.compute.amazonaws.com'
    'ec2-52-68-187-137.ap-northeast-1.compute.amazonaws.com'
    'ec2-52-79-176-113.ap-northeast-2.compute.amazonaws.com'
    'ec2-52-77-220-235.ap-southeast-1.compute.amazonaws.com'
    'ec2-52-62-74-45.ap-southeast-2.compute.amazonaws.com'
    'ec2-52-67-9-167.sa-east-1.compute.amazonaws.com'
)

function ping_all() {
    for instance in "${EC2_INSTANCES[@]}"; do
        ping -q -c 60 $instance
    done
}