kubespray/roles/kubernetes/control-plane/defaults/main/main.yml

---
# disable upgrade cluster
upgrade_cluster_setup: false

# change to 0.0.0.0 to enable insecure access from anywhere (not recommended)
kube_apiserver_insecure_bind_address: 127.0.0.1

# By default the external API listens on all interfaces, this can be changed to
# listen on a specific address/interface.
# NOTE: If you specific address/interface and use loadbalancer_apiserver_localhost
# loadbalancer_apiserver_localhost (nginx/haproxy) will deploy on masters on 127.0.0.1:{{ loadbalancer_apiserver_port|default(kube_apiserver_port) }} too.
kube_apiserver_bind_address: 0.0.0.0

# A port range to reserve for services with NodePort visibility.
# Inclusive at both ends of the range.
kube_apiserver_node_port_range: "30000-32767"

# ETCD backend for k8s data
kube_apiserver_storage_backend: etcd3

# CIS 1.2.26
# Validate that the service account token
# in the request is actually present in etcd.
kube_apiserver_service_account_lookup: true

kube_etcd_cacert_file: ca.pem
kube_etcd_cert_file: node-{{ inventory_hostname }}.pem
kube_etcd_key_file: node-{{ inventory_hostname }}-key.pem

# Associated interfaces must be reachable by the rest of the cluster, and by
# CLI/web clients.
kube_controller_manager_bind_address: 0.0.0.0

# Leader election lease durations and timeouts for controller-manager
kube_controller_manager_leader_elect_lease_duration: 15s
kube_controller_manager_leader_elect_renew_deadline: 10s

# discovery_timeout modifies the discovery timeout
discovery_timeout: 5m0s

# Instruct first master to refresh kubeadm token
kubeadm_refresh_token: true

# Scale down coredns replicas to 0 if not using coredns dns_mode
kubeadm_scale_down_coredns_enabled: true

# audit support
kubernetes_audit: false
# path to audit log file
audit_log_path: /var/log/audit/kube-apiserver-audit.log
# num days
audit_log_maxage: 30
# the num of audit logs to retain
audit_log_maxbackups: 1
# the max size in MB to retain
audit_log_maxsize: 100
# policy file
audit_policy_file: "{{ kube_config_dir }}/audit-policy/apiserver-audit-policy.yaml"
# custom audit policy rules (to replace the default ones)
# audit_policy_custom_rules: |
#   - level: None
#     users: []
#     verbs: []
#     resources: []

# audit log hostpath
audit_log_name: audit-logs
audit_log_hostpath: /var/log/kubernetes/audit
audit_log_mountpath: "{{ audit_log_path | dirname }}"

# audit policy hostpath
audit_policy_name: audit-policy
audit_policy_hostpath: "{{ audit_policy_file | dirname }}"
audit_policy_mountpath: "{{ audit_policy_hostpath }}"

# audit webhook support
kubernetes_audit_webhook: false

# path to audit webhook config file
audit_webhook_config_file: "{{ kube_config_dir }}/audit-policy/apiserver-audit-webhook-config.yaml"
audit_webhook_server_url: "https://audit.app"
audit_webhook_server_extra_args: {}
audit_webhook_mode: batch
audit_webhook_batch_max_size: 100
audit_webhook_batch_max_wait: 1s

kube_controller_node_monitor_grace_period: 40s
kube_controller_node_monitor_period: 5s
kube_controller_terminated_pod_gc_threshold: 12500
kube_apiserver_request_timeout: "1m0s"
kube_apiserver_pod_eviction_not_ready_timeout_seconds: "300"
kube_apiserver_pod_eviction_unreachable_timeout_seconds: "300"

# 1.10+ admission plugins
kube_apiserver_enable_admission_plugins: []

# enable admission plugins configuration
kube_apiserver_admission_control_config_file: false

# data structure to configure EventRateLimit admission plugin
# this should have the following structure:
# kube_apiserver_admission_event_rate_limits:
# <limit_name>:
#   type: <limit_type>
#   qps: <qps_value>
#   burst: <burst_value>
#   cache_size: <cache_size_value>
kube_apiserver_admission_event_rate_limits: {}

# 1.10+ list of disabled admission plugins
kube_apiserver_disable_admission_plugins: []

# extra runtime config
kube_api_runtime_config: []

## Enable/Disable Kube API Server Authentication Methods
kube_token_auth: false
kube_oidc_auth: false

## Variables for webhook token auth https://kubernetes.io/docs/reference/access-authn-authz/authentication/#webhook-token-authentication
kube_webhook_token_auth: false
kube_webhook_token_auth_url_skip_tls_verify: false
# kube_webhook_token_auth_url: https://...
## base64-encoded string of the webhook's CA certificate
# kube_webhook_token_auth_ca_data: "LS0t..."

## Variables for webhook token authz https://kubernetes.io/docs/reference/access-authn-authz/webhook/
# kube_webhook_authorization_url: https://...
kube_webhook_authorization: false
kube_webhook_authorization_url_skip_tls_verify: false


## Variables for OpenID Connect Configuration https://kubernetes.io/docs/admin/authentication/
## To use OpenID you have to deploy additional an OpenID Provider (e.g Dex, Keycloak, ...)

# kube_oidc_url: https:// ...
# kube_oidc_client_id: kubernetes
## Optional settings for OIDC
# kube_oidc_username_claim: sub
# kube_oidc_username_prefix: 'oidc:'
# kube_oidc_groups_claim: groups
# kube_oidc_groups_prefix: 'oidc:'
# Copy oidc CA file to the following path if needed
# kube_oidc_ca_file: {{ kube_cert_dir }}/ca.pem
# Optionally include a base64-encoded oidc CA cert
# kube_oidc_ca_cert: c3RhY2thYnVzZS5jb20...

# List of the preferred NodeAddressTypes to use for kubelet connections.
kubelet_preferred_address_types: 'InternalDNS,InternalIP,Hostname,ExternalDNS,ExternalIP'

## Extra args for k8s components passing by kubeadm
kube_kubeadm_apiserver_extra_args: {}
kube_kubeadm_controller_extra_args: {}

## Extra control plane host volume mounts
## Example:
# apiserver_extra_volumes:
#  - name: name
#    hostPath: /host/path
#    mountPath: /mount/path
#    readOnly: true
apiserver_extra_volumes: {}
controller_manager_extra_volumes: {}

## Encrypting Secret Data at Rest
kube_encrypt_secret_data: false
kube_encrypt_token: "{{ lookup('password', credentials_dir + '/kube_encrypt_token.creds length=32 chars=ascii_letters,digits') }}"
# Must be either: aescbc, secretbox or aesgcm
kube_encryption_algorithm: "secretbox"
# Which kubernetes resources to encrypt
kube_encryption_resources: [secrets]

# If non-empty, will use this string as identification instead of the actual hostname
kube_override_hostname: >-
  {%- if cloud_provider is defined and cloud_provider in [ 'aws' ] -%}
  {%- else -%}
  {{ inventory_hostname }}
  {%- endif -%}

secrets_encryption_query: "resources[*].providers[0].{{kube_encryption_algorithm}}.keys[0].secret"

## Support tls min version, Possible values: VersionTLS10, VersionTLS11, VersionTLS12, VersionTLS13.
# tls_min_version: ""

## Support tls cipher suites.
# tls_cipher_suites:
#   - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
#   - TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
#   - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
#   - TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
#   - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
#   - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
#   - TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
#   - TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
#   - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
#   - TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
#   - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
#   - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
#   - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
#   - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
#   - TLS_ECDHE_RSA_WITH_RC4_128_SHA
#   - TLS_RSA_WITH_3DES_EDE_CBC_SHA
#   - TLS_RSA_WITH_AES_128_CBC_SHA
#   - TLS_RSA_WITH_AES_128_CBC_SHA256
#   - TLS_RSA_WITH_AES_128_GCM_SHA256
#   - TLS_RSA_WITH_AES_256_CBC_SHA
#   - TLS_RSA_WITH_AES_256_GCM_SHA384
#   - TLS_RSA_WITH_RC4_128_SHA

## Amount of time to retain events. (default 1h0m0s)
event_ttl_duration: "1h0m0s"

## Automatically renew K8S control plane certificates on first Monday of each month
auto_renew_certificates: false
# First Monday of each month
auto_renew_certificates_systemd_calendar: "Mon *-*-1,2,3,4,5,6,7 03:{{ groups['kube_control_plane'].index(inventory_hostname) }}0:00"
# kubeadm renews all the certificates during control plane upgrade.
# If we have requirement like without renewing certs upgrade the cluster,
# we can opt out from the default behavior by setting kubeadm_upgrade_auto_cert_renewal to false
kubeadm_upgrade_auto_cert_renewal: true