c12s-kubespray/roles/kubernetes/control-plane/tasks/kubeadm-setup.yml

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---
- name: kubeadm | Check if old apiserver cert exists on host
stat:
path: "{{ kube_cert_dir }}/apiserver.pem"
get_attributes: no
get_checksum: no
get_mime: no
register: old_apiserver_cert
delegate_to: "{{ groups['kube-master'] | first }}"
run_once: true
- name: kubeadm | Migrate old certs if necessary
import_tasks: kubeadm-migrate-certs.yml
when: old_apiserver_cert.stat.exists
- name: Install OIDC certificate
copy:
content: "{{ kube_oidc_ca_cert | b64decode }}"
dest: "{{ kube_oidc_ca_file }}"
owner: root
group: root
mode: "0644"
when:
- kube_oidc_auth
- kube_oidc_ca_cert is defined
- name: kubeadm | Check serviceaccount key
stat:
path: "{{ kube_cert_dir }}/sa.key"
get_attributes: no
get_checksum: yes
get_mime: no
register: sa_key_before
run_once: true
- name: kubeadm | Check if kubeadm has already run
stat:
path: "/var/lib/kubelet/config.yaml"
get_attributes: no
get_checksum: no
get_mime: no
register: kubeadm_already_run
- name: kubeadm | Delete old admin.conf
file:
path: "{{ kube_config_dir }}/admin.conf"
state: absent
when:
- not kubeadm_already_run.stat.exists
- name: kubeadm | Delete old static pods
file:
path: "{{ kube_config_dir }}/manifests/{{ item }}.manifest"
state: absent
with_items: ["kube-apiserver", "kube-controller-manager", "kube-scheduler", "kube-proxy"]
when:
- old_apiserver_cert.stat.exists
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- name: kubeadm | Forcefully delete old static pods
shell: "set -o pipefail && docker ps -f name=k8s_{{ item }} -q | xargs --no-run-if-empty docker rm -f"
args:
executable: /bin/bash
with_items: ["kube-apiserver", "kube-controller-manager", "kube-scheduler"]
when:
- old_apiserver_cert.stat.exists
- name: kubeadm | aggregate all SANs
set_fact:
apiserver_sans: "{{ (sans_base + groups['kube-master'] + sans_lb + sans_lb_ip + sans_supp + sans_access_ip + sans_ip + sans_address + sans_override + sans_hostname + sans_fqdn) | unique }}"
vars:
sans_base:
- "kubernetes"
- "kubernetes.default"
- "kubernetes.default.svc"
- "kubernetes.default.svc.{{ dns_domain }}"
- "{{ kube_apiserver_ip }}"
- "localhost"
- "127.0.0.1"
sans_lb: "{{ [apiserver_loadbalancer_domain_name] if apiserver_loadbalancer_domain_name is defined else [] }}"
sans_lb_ip: "{{ [loadbalancer_apiserver.address] if loadbalancer_apiserver is defined and loadbalancer_apiserver.address is defined else [] }}"
sans_supp: "{{ supplementary_addresses_in_ssl_keys if supplementary_addresses_in_ssl_keys is defined else [] }}"
sans_access_ip: "{{ groups['kube-master'] | map('extract', hostvars, 'access_ip') | list | select('defined') | list }}"
sans_ip: "{{ groups['kube-master'] | map('extract', hostvars, 'ip') | list | select('defined') | list }}"
sans_address: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_default_ipv4', 'address']) | list | select('defined') | list }}"
sans_override: "{{ [kube_override_hostname] if kube_override_hostname else [] }}"
sans_hostname: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_hostname']) | list | select('defined') | list }}"
sans_fqdn: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_fqdn']) | list | select('defined') | list }}"
tags: facts
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- name: Create audit-policy directory
file:
path: "{{ audit_policy_file | dirname }}"
state: directory
when: kubernetes_audit|default(false) or kubernetes_audit_webhook|default(false)
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- name: Write api audit policy yaml
template:
src: apiserver-audit-policy.yaml.j2
dest: "{{ audit_policy_file }}"
when: kubernetes_audit|default(false) or kubernetes_audit_webhook|default(false)
- name: Write api audit webhook config yaml
template:
src: apiserver-audit-webhook-config.yaml.j2
dest: "{{ audit_webhook_config_file }}"
when: kubernetes_audit_webhook|default(false)
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# Nginx LB(default), If kubeadm_config_api_fqdn is defined, use other LB by kubeadm controlPlaneEndpoint.
- name: set kubeadm_config_api_fqdn define
set_fact:
kubeadm_config_api_fqdn: "{{ apiserver_loadbalancer_domain_name|default('lb-apiserver.kubernetes.local') }}"
when: loadbalancer_apiserver is defined
- name: kubeadm | set kubeadm version
import_tasks: kubeadm-version.yml
- name: kubeadm | Certificate management with kubeadm
import_tasks: kubeadm-certificate.yml
when:
- not upgrade_cluster_setup
- kubeadm_already_run.stat.exists
- name: kubeadm | Check if apiserver.crt contains all needed SANs
command: openssl x509 -noout -in "{{ kube_cert_dir }}/apiserver.crt" -check{{ item|ipaddr|ternary('ip','host') }} "{{ item }}"
with_items: "{{ apiserver_sans }}"
register: apiserver_sans_check
changed_when: "'does match certificate' not in apiserver_sans_check.stdout"
when:
- inventory_hostname == groups['kube-master']|first
- kubeadm_already_run.stat.exists
- name: kubeadm | regenerate apiserver cert 1/2
file:
state: absent
path: "{{ kube_cert_dir }}/{{ item }}"
with_items:
- apiserver.crt
- apiserver.key
when:
- inventory_hostname == groups['kube-master']|first
- kubeadm_already_run.stat.exists
- apiserver_sans_check.changed or force_certificate_regeneration
- name: kubeadm | regenerate apiserver cert 2/2
command: >-
{{ bin_dir }}/kubeadm
init phase certs apiserver
--config={{ kube_config_dir }}/kubeadm-config.yaml
when:
- inventory_hostname == groups['kube-master']|first
- kubeadm_already_run.stat.exists
- apiserver_sans_check.changed or force_certificate_regeneration
- name: kubeadm | Initialize first master
command: >-
timeout -k 300s 300s
{{ bin_dir }}/kubeadm init
--config={{ kube_config_dir }}/kubeadm-config.yaml
--ignore-preflight-errors=all
--skip-phases={{ kubeadm_init_phases_skip | join(',') }}
--upload-certs
register: kubeadm_init
# Retry is because upload config sometimes fails
retries: 3
until: kubeadm_init is succeeded or "field is immutable" in kubeadm_init.stderr
when: inventory_hostname == groups['kube-master']|first and not kubeadm_already_run.stat.exists
failed_when: kubeadm_init.rc != 0 and "field is immutable" not in kubeadm_init.stderr
environment:
PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}"
notify: Master | restart kubelet
- name: set kubeadm certificate key
set_fact:
kubeadm_certificate_key: "{{ item | regex_search('--certificate-key ([^ ]+)','\\1') | first }}"
with_items: "{{ hostvars[groups['kube-master'][0]]['kubeadm_init'].stdout_lines | default([]) }}"
when:
- kubeadm_certificate_key is not defined
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- (item | trim) is match('.*--certificate-key.*')
- name: Create hardcoded kubeadm token for joining nodes with 24h expiration (if defined)
shell: >-
{{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token delete {{ kubeadm_token }} || :;
{{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token create {{ kubeadm_token }}
changed_when: false
when:
- inventory_hostname == groups['kube-master']|first
- kubeadm_token is defined
- kubeadm_refresh_token
tags:
- kubeadm_token
- name: Create kubeadm token for joining nodes with 24h expiration (default)
command: "{{ bin_dir }}/kubeadm --kubeconfig /etc/kubernetes/admin.conf token create"
changed_when: false
register: temp_token
retries: 5
delay: 5
until: temp_token is succeeded
delegate_to: "{{ groups['kube-master'] | first }}"
when: kubeadm_token is not defined
tags:
- kubeadm_token
- name: Set kubeadm_token
set_fact:
kubeadm_token: "{{ temp_token.stdout }}"
when: temp_token.stdout is defined
tags:
- kubeadm_token
- name: kubeadm | Join other masters
include_tasks: kubeadm-secondary.yml
- name: kubeadm | upgrade kubernetes cluster
include_tasks: kubeadm-upgrade.yml
when:
- upgrade_cluster_setup
- kubeadm_already_run.stat.exists
- name: kubeadm | Check serviceaccount key again
stat:
path: "{{ kube_cert_dir }}/sa.key"
get_attributes: no
get_checksum: yes
get_mime: no
register: sa_key_after
run_once: true
- name: kubeadm | Set secret_changed if service account key was updated
command: /bin/true
notify: Master | set secret_changed
when: sa_key_before.stat.checksum|default("") != sa_key_after.stat.checksum
- name: kubeadm | cleanup old certs if necessary
import_tasks: kubeadm-cleanup-old-certs.yml
when:
- old_apiserver_cert.stat.exists
# FIXME(mattymo): from docs: If you don't want to taint your control-plane node, set this field to an empty slice, i.e. `taints: {}` in the YAML file.
- name: kubeadm | Remove taint for master with node role
command: "{{ bin_dir }}/kubectl --kubeconfig {{ kube_config_dir }}/admin.conf taint node {{ inventory_hostname }} node-role.kubernetes.io/master:NoSchedule- node-role.kubernetes.io/control-plane:NoSchedule-"
delegate_to: "{{ groups['kube-master'] | first }}"
when: inventory_hostname in groups['kube-node']
failed_when: false