kubespray/roles/kubernetes/secrets/templates/openssl.conf.j2

[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names
[alt_names]
DNS.1 = kubernetes
DNS.2 = kubernetes.default
DNS.3 = kubernetes.default.svc
DNS.4 = kubernetes.default.svc.{{ dns_domain }}
DNS.5 = localhost
{% for host in groups['kube-master'] %}
DNS.{{ 5 + loop.index }} = {{ host }}
{% endfor %}
{% if loadbalancer_apiserver is defined  %}
{% set idx =  groups['kube-master'] | length | int + 5 + 1 %}
DNS.{{ idx | string }} = {{ apiserver_loadbalancer_domain_name }}
{% endif %}
{% for host in groups['kube-master'] %}
IP.{{ 2 * loop.index - 1 }} = {{ hostvars[host]['access_ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
IP.{{ 2 * loop.index }} = {{ hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
{% endfor %}
{% set idx =  groups['kube-master'] | length | int * 2 + 1 %}
IP.{{ idx }} = {{ kube_apiserver_ip }}
IP.{{ idx + 1 }} = 127.0.0.1
{% if supplementary_addresses_in_ssl_keys is defined %}
{% set is = idx + 1 %}
{% for addr in supplementary_addresses_in_ssl_keys %}
{% if addr | ipaddr %}
IP.{{ is + loop.index }} = {{ addr }}
{% else %}
DNS.{{ is + loop.index }} = {{ addr }}
{% endif %}
{% endfor %}
{% endif %}