#cloud-config
# Template for both lab guests. scripts/rebuild-seed.sh substitutes __NODE__
# and bakes this into a CIDATA seed image.
#
# Copy to kc-lab.yaml and fill the two placeholders. The real file is ignored by
# git because plain_text_passwd is a credential, however disposable.
#
# Indentation is spaces only. YAML forbids tabs, and cloud-init fails silently
# on a parse error: the guest boots as "localhost" with no user and no way in.
hostname: kc-lab-__NODE__
fqdn: kc-lab-__NODE__
manage_etc_hosts: true

users:
  - name: donghyeon
    groups: [sudo]
    shell: /bin/bash
    # NOPASSWD is required: the k3s installer and the fault-injection scripts
    # run non-interactively and would block on a password prompt.
    #
    # A string, not a list. The list form still boots, but `cloud-init schema -c`
    # (22.4.2 on the guests) rejects it and prints the whole users.0 block with
    # "is not valid under any of the given schemas" — naming no key. That makes
    # the guide's own validation step look broken when it is not.
    sudo: "ALL=(ALL) NOPASSWD:ALL"
    # Console-only escape hatch. Without it, a cloud-init failure leaves a guest
    # that cannot be logged into at all, so its own failure log is unreadable.
    # ssh_pwauth stays false, so this never widens SSH exposure.
    lock_passwd: false
    plain_text_passwd: CHANGE_ME
    ssh_authorized_keys:
      # Lab host key: needed because automation runs from the lab host, where
      # agent forwarding is not available.
      - CHANGE_ME_LAB_HOST_PUBLIC_KEY
      # Workstation key: lets ProxyJump reach the guest directly.
      - CHANGE_ME_WORKSTATION_PUBLIC_KEY

ssh_pwauth: false
package_update: true
packages:
  - curl
  - nftables
# kc-lab-edge only. The k3s nodes do not need these, and the edge does not need
# anything else — nginx terminates TLS and certbot renews the certificate, both
# inside this disposable guest.
#  - nginx
#  - certbot
#  - python3-certbot-dns-cloudflare