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passwordless.sh
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passwordless.sh
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#!/usr/bin/env bash
# get script source
SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
ROOT_DIR="${SOURCE_DIR}/.."
ENV_FILE="${ENV_FILE:-"${ROOT_DIR}/.env"}"
# source project files
if [ -f "${ENV_FILE}" ]; then
source "${ENV_FILE}"
fi
source "${SOURCE_DIR}/utils.sh"
# variables
SERVICE_USER="${SERVICE_USER:-"$(get_data "service user account")"}"
SSH_PORT="${SSH_PORT:-"22"}"
SSH_KEY_TYPE="${SSH_KEY_TYPE:-"ed25519"}"; SSH_KEY_TYPE="${SSH_KEY_TYPE,,}"
SSH_KEY="${SSH_KEY:-"${HOME}/.ssh/id_${SSH_KEY_TYPE}"}"
PUBLIC_SSH_KEY="${PUBLIC_SSH_KEY:-"${SSH_KEY}.pub"}"
# env variables
env_variables=(
"SERVICE_USER"
"SSH_PORT"
"SSH_KEY_TYPE"
"SSH_KEY"
"PUBLIC_SSH_KEY"
)
# ================= DO NOT EDIT BEYOND THIS LINE =================
# get address of all kubernetes nodes
k8s_nodes=($(get_values "address of kubernetes node"))
# get user confirmation
print_title "passwordless"
confirm_values "${env_variables[@]}"
confirm="${?}"
if [ "${confirm}" -ne 0 ]; then
exit "${confirm}"
fi
# generate ssh key if not exists
if ! [ -f "${SSH_KEY}" ]; then
echo "Generating SSH key (${SSH_KEY_TYPE})"
ssh-keygen -t "${SSH_KEY_TYPE}" -f "${SSH_KEY}" -N ""
else
echo "SSH key already exists (${SSH_KEY})"
fi
# copy SSH key to each node
if [ -f "${PUBLIC_SSH_KEY}" ]; then
for node in "${k8s_nodes[@]}"; do
echo "Copying public SSH key to ${SERVICE_USER}@${node}"
ssh-copy-id -i "${PUBLIC_SSH_KEY}" -p "${SSH_PORT}" "${SERVICE_USER}@${node}"
done
else
echo "ERROR: public SSH key not found! (${PUBLIC_SSH_KEY})"
fi