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@Ahmadposten
Last active May 4, 2019 11:00
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Use tmux to ssh to all instances of an AWS autoscaling group and execute commands simultaneously.
#!/bin/bash
#
# _ _ _
# ____ | | | | | |
# / __ \ __ _| |__ _ __ ___ __ _ __| |_ __ ___ ___| |_ ___ _ __
# / / _` |/ _` | '_ \| '_ ` _ \ / _` |/ _` | '_ \ / _ \/ __| __/ _ \ '_ \
# | | (_| | (_| | | | | | | | | | (_| | (_| | |_) | (_) \__ \ || __/ | | |
# \ \__,_|\__,_|_| |_|_| |_| |_|\__,_|\__,_| .__/ \___/|___/\__\___|_| |_|
# \____/ | |
# |_|
#####################################################
#
# Use this script to ssh to multiple instances in an AWS autoscaling group using tmux. It synchronizes all the panes
# so you can execute the same command on all of the machines simultaneously. Dependences are tmux and aws cli. AWS cli
# needs to be configured
# configurations.
# You have to set these before running the script
AUTO_SCALING_GROUP_NAME="my group name"
SSH_KEY_PATH="my key path"
USER="my username (the ssh user)"
if ! command -v "aws" >/dev/null 2>&1; then
echo "AWS cli is not installed. please follow 'http://docs.aws.amazon.com/cli/latest/userguide/installing.html'"
fi;
if ! command -v "tmux" >/dev/null 2>&1; then
echo "Please install tmux";
fi;
HOSTS=( $(aws --output text --query "Reservations[*].Instances[*].PublicIpAddress" ec2 describe-instances --instance-ids\
`aws --output text --query "AutoScalingGroups[0].Instances[*].InstanceId" autoscaling describe-auto-scaling-groups \
--auto-scaling-group-names "$AUTO_SCALING_GROUP_NAME"` | tr "\n" " " | tr "\t" " "))
tmux new-window "ssh $USER@${HOSTS[0]} -i $SSH_KEY_PATH"
HOSTS=("${HOSTS[@]:1}")
for i in "${HOSTS[@]}"; do
tmux split-window -h "ssh $USER@$i -i $SSH_KEY_PATH"
tmux select-layout tiled > /dev/null
done
tmux select-pane -t 0
tmux set-window-option synchronize-panes on > /dev/null
@Ahmadposten
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Ahmadposten commented Dec 24, 2016

DEMO

demo

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