self-hosting/roles/kubernetes-ca/tasks/main.yml

---
- name: Generate list of IP addresses and hostnames needed for Kubernetes API server certificate
  set_fact:
    tmpK8sHosts: |
      {% set comma = joiner(",") %}
      {% for item in groups["k8s_master"] -%}
        {{ comma() }}{{ hostvars[item].private_ip }}{{ comma() }}{{ hostvars[item]["ansible_"+hostvars[item]["peervpn_conf_interface"]].ipv4.address }}{{ comma() }}{{ hostvars[item]["public_ip"] }}{{ comma() }}{{ hostvars[item].ansible_hostname }}
      {%- endfor %}
      {% for item in groups["k8s_worker"] -%}
        {{ comma() }}{{ hostvars[item].private_ip}}{{ comma() }}{{ hostvars[item]["ansible_"+hostvars[item]["peervpn_conf_interface"]].ipv4.address }}{{ comma() }}{{ hostvars[item]["public_ip"] }}{{ comma() }}{{ hostvars[item].ansible_hostname }}
      {%- endfor %}
      {% for item in k8s_apiserver_cert_hosts -%}
        {{ comma() }}{{item}}
      {%- endfor %}
  tags:
    - kubernetes-ca

- name: Remove newline from controller hosts list
  set_fact:
    k8sHosts: "{{tmpK8sHosts |replace('\n', '')}}"
  tags:
    - kubernetes-ca

- name: Output of hostnames/IPs used for Kubernetes API server certificate
  debug: var=k8sHosts
  tags:
    - kubernetes-ca
- name: Generate list of IP addresses and hostnames needed for etcd certificate
  set_fact:
    tmpEtcdHosts: |
      {% set comma = joiner(",") %}
      {% for item in groups["k8s_etcd"] -%}
        {{ comma() }}{{ hostvars[item].private_ip}}{{ comma() }}{{ hostvars[item]["ansible_"+hostvars[item]["peervpn_conf_interface"]].ipv4.address }}{{ comma() }}{{hostvars[item]["public_ip"]}}{{ comma() }}{{ hostvars[item].ansible_hostname }}
      {%- endfor %}
      {% for item in etcd_cert_hosts -%}
        {{ comma() }}{{item}}
      {%- endfor %}
  tags:
    - kubernetes-ca
    - kubernetes-ca-etcd

- name: Remove newline from etcd hosts list
  set_fact:
    etcdHosts: "{{tmpEtcdHosts |replace('\n', '')}}"
  tags:
    - kubernetes-ca
    - kubernetes-ca-etcd

- name: Output of hostnames/IPs used for etcd certificate
  debug: var=etcdHosts
  tags:
    - kubernetes-ca
    - kubernetes-ca-etcd

- name: Create directory for CA and certificate files
  file:
    path: "{{k8s_ca_conf_directory}}"
    owner: "{{k8s_ca_certificate_owner}}"
    group: "{{k8s_ca_certificate_group}}"
    mode: 0755
    state: directory
  tags:
    - kubernetes-ca

- name: Create CA configuration file
  template:
    src: "ca-config.json.j2"
    dest: "{{k8s_ca_conf_directory}}/ca-config.json"
    owner: "{{k8s_ca_certificate_owner}}"
    group: "{{k8s_ca_certificate_group}}"
    mode: 0600
  tags:
    - kubernetes-ca

- name: Create the CSR files
  template:
    src: "csr.json.j2"
    dest: "{{k8s_ca_conf_directory}}/{{ item.name }}-csr.json"
    owner: "{{k8s_ca_certificate_owner}}"
    group: "{{k8s_ca_certificate_group}}"
    mode: 0600
  tags:
    - kubernetes-ca
  loop: "{{ k8s_csr.master|flatten(levels=1)}}"
  loop_control:
    label: "{{ item.name }}"

- name: Generate CA and private key
  shell: cfssl gencert -initca ca-csr.json | cfssljson -bare ca
  args:
    chdir: "{{k8s_ca_conf_directory}}"
    creates: "{{k8s_ca_conf_directory}}/ca-key.pem"
  tags:
    - kubernetes-ca

- name: Create the worker CSR files
  template:
    src: "cert-worker-csr.json.j2"
    dest: "{{k8s_ca_conf_directory}}/{{item}}-csr.json"
    owner: "{{k8s_ca_certificate_owner}}"
    group: "{{k8s_ca_certificate_group}}"
    mode: 0600
  with_inventory_hostnames:
    - k8s_worker
  vars:
    - workerHost: "{{item}}"
  tags:
    - kubernetes-ca

- name: Generate TLS certificates whith hostname
  shell: "cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -hostname={{item.hostnames}} -profile=kubernetes {{item.name}}-csr.json | cfssljson -bare {{item.name}}"
  args:
    chdir: "{{k8s_ca_conf_directory}}"
    creates: "{{k8s_ca_conf_directory}}/{{item.name}}-key.pem"
  tags:
    - kubernetes-ca
  loop: "{{ k8s_csr.master|flatten(levels=1)}}"
  loop_control:
    label: "{{ item.name }}"
  when: item.hostnames is defined

- name: Generate TLS certificates whithout hostname
  shell: "cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes {{item.name}}-csr.json | cfssljson -bare {{item.name}}"
  args:
    chdir: "{{k8s_ca_conf_directory}}"
    creates: "{{k8s_ca_conf_directory}}/{{item.name}}-key.pem"
  tags:
    - kubernetes-ca
  loop: "{{ k8s_csr.master|flatten(levels=1)}}"
  loop_control:
    label: "{{ item.name }}"
  when: item.hostnames is not defined

- name: Generate TLS certificates for Kubernetes worker hosts
  shell: "cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -hostname={{hostvars[item]['ansible_hostname']}},{{hostvars[item]['ansible_default_ipv4']['address']}},{{hostvars[item]['ansible_'+hostvars[item]['peervpn_conf_interface']].ipv4.address}} -profile=kubernetes {{item}}-csr.json | cfssljson -bare {{item}}"
  args:
    chdir: "{{k8s_ca_conf_directory}}"
    creates: "{{k8s_ca_conf_directory}}/{{item}}-key.pem"
  with_inventory_hostnames:
    - k8s_worker
  tags:
    - kubernetes-ca