a script to ssh multiple servers over multiple tmux panes

.envrc

#export AWS_ACCESS_KEY_ID="AWSのアクセスキー"
#export AWS_SECRET_ACCESS_KEY="AWSのシークレットアクセスキー"

use nix

shell.nix

with import <nixpkgs> {}; {
  shellEnv = stdenv.mkDerivation {
    name = "shell-env";

    buildInputs = [
	  awscli
	  jq
    ];
  };
} 

ssh-multi-ec2

#!/bin/bash
# ssh-multi-ec2
# based on ssh-multi by D.Kovalov
# https://gist.github.com/dmytro/3984680
# in turn based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html
# dependency lib [awscli,jq]

# a script to ssh multiple servers over multiple tmux panes
# customized for ec2


starttmux() {
    #if [ -z "$HOSTS" ]; then
    #   echo -n "Please provide of list of hosts separated by spaces [ENTER]: "
    #   read HOSTS
    #fi

    hosts=($(aws ec2 describe-instances | jq '.Reservations[].Instances[].PublicDnsName'))
	
    local ident=""
    local user=""

    if [ "$IDENT" = "none" ]; then
        ident=""
    else
        ident=" -i $IDENT"
    fi

    if [ "$USER" = "none" ]; then
        user=""
    else
        user=" ${USER}@"
    fi

    tmux new-window "ssh $ident $user${hosts[0]}"

    unset hosts[0];
    for i in "${hosts[@]}"; do
        tmux split-window "ssh $ident $user$i"
        tmux select-layout tiled > /dev/null
    done
}

HOSTTMP="${@:3}"
HOSTS=${HOSTS:=$HOSTTMP}
IDENT=$1
USER=$2

starttmux