kubespray/roles/kubernetes/preinstall/defaults/main.yml

---
# Set to true to allow pre-checks to fail and continue deployment
ignore_assert_errors: false

epel_enabled: false
# Kubespray sets this to true after clusterDNS is running to apply changes to the host resolv.conf
dns_late: false

common_required_pkgs:
  - "{{ (ansible_distribution == 'openSUSE Tumbleweed') | ternary('openssl-1_1', 'openssl') }}"
  - curl
  - rsync
  - socat
  - unzip
  - e2fsprogs
  - xfsprogs
  - ebtables
  - bash-completion

# Set to true if your network does not support IPv6
# This maybe necessary for pulling Docker images from
# GCE docker repository
disable_ipv6_dns: false

kube_owner: kube
kube_cert_group: kube-cert
kube_config_dir: /etc/kubernetes
kube_cert_dir: "{{ kube_config_dir }}/ssl"
kube_cert_compat_dir: /etc/kubernetes/pki
kubelet_flexvolumes_plugins_dir: /usr/libexec/kubernetes/kubelet-plugins/volume/exec

# Flatcar Container Linux by Kinvolk cloud init config file to define /etc/resolv.conf content
# for hostnet pods and infra needs
resolveconf_cloud_init_conf: /etc/resolveconf_cloud_init.conf

# All inventory hostnames will be written into each /etc/hosts file.
populate_inventory_to_hosts_file: true

sysctl_file_path: "/etc/sysctl.d/99-sysctl.conf"

etc_hosts_localhost_entries:
  127.0.0.1:
    expected:
      - localhost
      - localhost.localdomain
  ::1:
    expected:
      - localhost6
      - localhost6.localdomain
    unexpected:
      - localhost
      - localhost.localdomain

# Minimal memory requirement in MB for safety checks
minimal_node_memory_mb: 1024
minimal_master_memory_mb: 1500

yum_repo_dir: /etc/yum.repos.d

# number of times package install task should be retried
pkg_install_retries: 4

# Check if access_ip responds to ping. Set false if your firewall blocks ICMP.
ping_access_ip: true

## NTP Settings
# Start the ntpd or chrony service and enable it at system boot.
ntp_enabled: false
# The package to install which provides NTP functionality.
# The default is ntp for most platforms, or chrony on RHEL/CentOS 7 and later.
# The ntp_package can be one of ['ntp','chrony']
ntp_package: >-
      {% if ansible_os_family == "RedHat" -%}
      chrony
      {%- else -%}
      ntp
      {%- endif -%}

# Manage the NTP configuration file.
ntp_manage_config: false
# Specify the NTP servers
# Only takes effect when ntp_manage_config is true.
ntp_servers:
  - "0.pool.ntp.org iburst"
  - "1.pool.ntp.org iburst"
  - "2.pool.ntp.org iburst"
  - "3.pool.ntp.org iburst"
# Restrict NTP access to these hosts.
# Only takes effect when ntp_manage_config is true.
ntp_restrict:
  - "127.0.0.1"
  - "::1"
# The NTP driftfile path
# Only takes effect when ntp_manage_config is true.
ntp_driftfile: /var/lib/ntp/ntp.drift
# Enable tinker panic is useful when running NTP in a VM environment.
# Only takes effect when ntp_manage_config is true.
ntp_tinker_panic: false

# Force sync time immediately after the ntp installed, which is useful in in newly installed system.
ntp_force_sync_immediately: false