kubespray/roles/kubernetes/secrets/tasks/gen_certs_script.yml

---
- name: "Gen_certs | Create kubernetes config directory (on {{groups['kube-master'][0]}})"
  file:
    path: "{{ kube_config_dir }}"
    state: directory
    owner: kube
  run_once: yes
  delegate_to: "{{groups['kube-master'][0]}}"
  tags: [kubelet, k8s-secrets, kube-controller-manager, kube-apiserver, bootstrap-os, apps, network, master, node]
  when: gen_certs|default(false)

- name: "Gen_certs | Create kubernetes script directory (on {{groups['kube-master'][0]}})"
  file:
    path: "{{ kube_script_dir }}"
    state: directory
    owner: kube
  run_once: yes
  delegate_to: "{{groups['kube-master'][0]}}"
  tags: [k8s-secrets, bootstrap-os]
  when: gen_certs|default(false)

- name: Gen_certs | write openssl config
  template:
    src: "openssl.conf.j2"
    dest: "{{ kube_config_dir }}/openssl.conf"
  run_once: yes
  delegate_to: "{{groups['kube-master'][0]}}"
  when: gen_certs|default(false)

- name: Gen_certs | copy certs generation script
  copy:
    src: "make-ssl.sh"
    dest: "{{ kube_script_dir }}/make-ssl.sh"
    mode: 0700
  run_once: yes
  delegate_to: "{{groups['kube-master'][0]}}"
  when: gen_certs|default(false)

- name: Gen_certs | run cert generation script
  command: "{{ kube_script_dir }}/make-ssl.sh -f {{ kube_config_dir }}/openssl.conf -d {{ kube_cert_dir }}"
  environment:
    - MASTERS: "{% for m in groups['kube-master'] %}
                  {% if hostvars[m].sync_certs|default(true) %}
                    {{ m }}
                  {% endif %}
                {% endfor %}"
    - HOSTS: "{% for h in groups['k8s-cluster'] %}
                {% if hostvars[h].sync_certs|default(true) %}
                    {{ h }}
                {% endif %}
              {% endfor %}"
  run_once: yes
  delegate_to: "{{groups['kube-master'][0]}}"
  when: gen_certs|default(false)
  notify: set secret_changed

- set_fact:
    all_master_certs: "['ca-key.pem',
                      {% for node in groups['kube-master'] %}
                      'admin-{{ node }}.pem',
                      'admin-{{ node }}-key.pem',
                      'apiserver.pem',
                      'apiserver-key.pem',
                      {% endfor %}]"
    my_master_certs: ['ca-key.pem',
                     'admin-{{ inventory_hostname }}.pem',
                     'admin-{{ inventory_hostname }}-key.pem',
                     'apiserver.pem',
                     'apiserver-key.pem'
                     ]
    all_node_certs: "['ca.pem',
                    {% for node in groups['k8s-cluster'] %}
                    'node-{{ node }}.pem',
                    'node-{{ node }}-key.pem',
                    {% endfor %}]"
    my_node_certs: ['ca.pem', 'node-{{ inventory_hostname }}.pem', 'node-{{ inventory_hostname }}-key.pem']
  tags: facts

- name: Gen_certs | Gather master certs
  shell: "tar cfz - -C {{ kube_cert_dir }} -T /dev/stdin <<< {{ my_master_certs|join(' ') }} {{ all_node_certs|join(' ') }} | base64 --wrap=0"
  args:
    executable: /bin/bash
  register: master_cert_data
  check_mode: no
  delegate_to: "{{groups['kube-master'][0]}}"
  when: inventory_hostname in groups['kube-master'] and sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]

- name: Gen_certs | Gather node certs
  shell: "tar cfz - -C {{ kube_cert_dir }} -T /dev/stdin <<< {{ my_node_certs|join(' ') }} | base64 --wrap=0"
  args:
    executable: /bin/bash
  register: node_cert_data
  check_mode: no
  delegate_to: "{{groups['kube-master'][0]}}"
  when: inventory_hostname in groups['kube-node'] and
        sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]

#NOTE(mattymo): Use temporary file to copy master certs because we have a ~200k
#char limit when using shell command

#FIXME(mattymo): Use tempfile module in ansible 2.3
- name: Gen_certs | Prepare tempfile for unpacking certs
  shell: mktemp /tmp/certsXXXXX.tar.gz
  register: cert_tempfile

- name: Gen_certs | Write master certs to tempfile
  copy:
    content: "{{master_cert_data.stdout}}"
    dest: "{{cert_tempfile.stdout}}"
    owner: root
    mode: "0600"
  when: inventory_hostname in groups['kube-master'] and sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]

- name: Gen_certs | Unpack certs on masters
  shell: "base64 -d < {{ cert_tempfile.stdout }} | tar xz -C {{ kube_cert_dir }}"
  changed_when: false
  check_mode: no
  when: inventory_hostname in groups['kube-master'] and sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]
  notify: set secret_changed

- name: Gen_certs | Cleanup tempfile
  file:
    path: "{{cert_tempfile.stdout}}"
    state: absent
  when: inventory_hostname in groups['kube-master'] and sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]

- name: Gen_certs | Copy certs on nodes
  shell: "base64 -d <<< '{{node_cert_data.stdout|quote}}' | tar xz -C {{ kube_cert_dir }}"
  args:
    executable: /bin/bash
  changed_when: false
  check_mode: no
  when: inventory_hostname in groups['kube-node'] and
        sync_certs|default(false) and
        inventory_hostname != groups['kube-master'][0]
  notify: set secret_changed

- name: Gen_certs | check certificate permissions
  file:
    path={{ kube_cert_dir }}
    group={{ kube_cert_group }}
    owner=kube
    recurse=yes

- name: Gen_certs | set permissions on keys
  shell: chmod 0600 {{ kube_cert_dir}}/*key.pem
  when: inventory_hostname in groups['kube-master']
  changed_when: false

- name: Gen_certs | target ca-certificates path
  set_fact:
    ca_cert_path: |-
      {% if ansible_os_family == "Debian" -%}
      /usr/local/share/ca-certificates/kube-ca.crt
      {%- elif ansible_os_family == "RedHat" -%}
      /etc/pki/ca-trust/source/anchors/kube-ca.crt
      {%- elif ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] -%}
      /etc/ssl/certs/kube-ca.pem
      {%- endif %}      
  tags: facts

- name: Gen_certs | add CA to trusted CA dir
  copy:
    src: "{{ kube_cert_dir }}/ca.pem"
    dest: "{{ ca_cert_path }}"
    remote_src: true
  register: kube_ca_cert

- name: Gen_certs | update ca-certificates (Debian/Ubuntu/Container Linux by CoreOS)
  command: update-ca-certificates
  when: kube_ca_cert.changed and ansible_os_family in ["Debian", "CoreOS", "Container Linux by CoreOS"]

- name: Gen_certs | update ca-certificates (RedHat)
  command: update-ca-trust extract
  when: kube_ca_cert.changed and ansible_os_family == "RedHat"