KodeKloud 100 Days of DevOps helper scripts

setup.sh

#!/usr/bin/env bash

# This script sets up passwordless SSH and sudo on the app servers
# Data from https://kodekloudhub.github.io/kodekloud-engineer/docs/projects/nautilus#infrastructure-details

# Generate an SSH key pair
ssh-keygen -t ed25519 -f "$HOME/.ssh/id_ed25519" -N ""

# Disable SSH client strict host key checking
sudo -S sed -i "/StrictHostKeyChecking/s/^#//;s/ask/no/" /etc/ssh/ssh_config <<< mjolnir123

# Array variable with the credentials for the 3 App Servers
declare -A HOSTS=(
  ["tony@stapp01"]="Ir0nM@n"
  ["steve@stapp02"]="Am3ric@"
  ["banner@stapp03"]="BigGr33n"
)

# loop to set up the generated public key on the 3 App Servers & set up passwordless sudo there
for USERHOST in "${!HOSTS[@]}"; do
  PASSWORD="${HOSTS[$USERHOST]}"
  sshpass -p "$PASSWORD" ssh-copy-id "$USERHOST"
  ssh "$USERHOST" "echo '$PASSWORD' | sudo -S bash -c 'echo %wheel ALL=\(ALL\) NOPASSWD: ALL > /etc/sudoers.d/nopasswd'"
done