a13labs.infra/ansible/host_vars/contabo01.a13labs.pt.yml

hostname: contabo01.a13labs.pt
ansible_user: "{{ lookup('env', 'ANSIBLE_USER') }}"

# Users
login_users:
  - username: "{{ ansible_user }}"
    comment: "Managed by Ansible"
    sudoer: true
    sudoer_root_only: true
    sudoer_no_password: true
    pubkey: "{{ lookup('file', 'keys/ansible_user.pub') }}"
    password_disabled: true
  - username: operator
    comment: "Managed by Ansible"
    sudoer: true
    pubkey: "{{ lookup('file', 'keys/operator.pub') }}"
  - username: git
    comment: "Managed by Ansible"
    shell: "/usr/local/bin/gitea-shell"
    password_disabled: true
    password_expiration: false

# SSH Connection and security
sshd_port: 22
ssh_allowed_networks:
  - "0.0.0.0/0"
sshd_admin_net: "0.0.0.0/0"
sshd_allow_groups: "{{ ansible_user }} git users"
sshd_permit_root_login: "no"
sshd_password_authentication: "no"
sshd_allow_tcp_forwarding: "yes"

# Due to an issue increase the number of max auth tries
sshd_max_auth_tries: 10

# Firewall ports
ufw_enable: true
fw_allowed_ports:
  - { rule: "allow", port: "80", proto: "tcp" }
  - { rule: "allow", port: "443", proto: "tcp" }
  - { rule: "allow", port: "22", proto: "tcp" }
  - { rule: "allow", port: "16443", proto: "tcp", from: "10.1.0.0/16" }
  - { rule: "allow", port: "10254", proto: "tcp", from: "10.1.0.0/16" }
  - { rule: "allow", port: "10254", proto: "tcp", from: "147.78.131.194" }

ufw_outgoing_traffic:
  - 22 # SSH
  - 53 # DNS
  - 80 # HTTP
  - 123 # NTP
  - 443 # HTTPS
  - 853 # DNS over TLS
  - 10250 # Kubelet
  - 16443 # Kube API Server
  - 4443
  - 9443

ufw_default_forward_policy: "ACCEPT"

ipv4_sysctl_settings:
  net.ipv4.ip_forward: 1

disable_ipv6: true

# geoip will override hosts_allow and hosts_deny (so it's disabled - CIS hardening)
custom_hosts_acls: true

# GeoIP subscription
geoip_sshd_enabled: true
geoip_ssh_allowed_zones:
  - "BE"
  - "PT"
geoip_ssh_allowed_networks:
  - "0.0.0.0/0"

# fail2ban
fail2ban_jails:
  ssh:
    enabled: true
    port: "{{ sshd_port }}"
    filter: "sshd"
    logpath: "/var/log/auth.log"
    maxretry: 5
    findtime: 600
    bantime: 3600

# Unattended upgrades
unattended_reboot: true
unattended_reboot_time: "04:30"

# Kubernetes specific settings
microk8s_version: 1.29
microk8s_allowed_hosts:
  - 87.67.163.177
microk8s_alt_names: "{{ hostname }}"

# Let's encrypt issuer
microk8s_issuer_email: c.alexandre.pires@alexpires.me
microk8s_encryption_cfg: /a13labs/microk8s_encryption.yaml
microk8s_encryption_secret: "{{ lookup('env', 'MICROK8S_ENCRYPTION_SECRET') }}"
microk8s_users:
  - username: operator
    enabled: true
  - username: git
    namespace: "gitea"
    enabled: true

# Duo Security
duo_users: ["*", "!provision", "!git"]
duo_api_hostname: api-7cda1654.duosecurity.com