c12s-kubespray/roles/kubernetes/master/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"
register: old_apiserver_cert
delegate_to: "{{groups['kube-master']|first}}"
run_once: true
- name: kubeadm | Check service account key
stat:
path: "{{ kube_cert_dir }}/sa.key"
register: sa_key_before
delegate_to: "{{groups['kube-master']|first}}"
run_once: true
- name: kubeadm | Check if kubeadm has already run
stat:
path: "/var/lib/kubelet/config.yaml"
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
- name: kubeadm | Forcefully delete old static pods
shell: "docker ps -f name=k8s_{{item}} -q | xargs --no-run-if-empty docker rm -f"
with_items: ["kube-apiserver", "kube-controller-manager", "kube-scheduler"]
when: old_apiserver_cert.stat.exists
- name: kubeadm | aggregate all SANs
set_fact:
apiserver_sans: >-
kubernetes
kubernetes.default
kubernetes.default.svc
kubernetes.default.svc.{{ dns_domain }}
{{ kube_apiserver_ip }}
localhost
127.0.0.1
{{ ' '.join(groups['kube-master']) }}
{%- if loadbalancer_apiserver is defined %}
{{ apiserver_loadbalancer_domain_name }}
{%- endif %}
{%- for host in groups['kube-master'] -%}
{%- if hostvars[host]['access_ip'] is defined %}{{ hostvars[host]['access_ip'] }}{% endif %}
{{ hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
{%- endfor %}
{%- if supplementary_addresses_in_ssl_keys is defined %}
{%- for addr in supplementary_addresses_in_ssl_keys %}
{{ addr }}
{%- endfor %}
{%- endif %}
tags: facts
- name: kubeadm | Copy etcd cert dir under k8s cert dir
command: "cp -TR {{ etcd_cert_dir }} {{ kube_config_dir }}/ssl/etcd"
changed_when: false
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- name: Create audit-policy directory
file:
path: "{{ audit_policy_file | dirname }}"
state: directory
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when: kubernetes_audit|default(false)
- name: Write api audit policy yaml
template:
src: apiserver-audit-policy.yaml.j2
dest: "{{ audit_policy_file }}"
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when: kubernetes_audit|default(false)
- name: gets the kubeadm version
command: "{{ bin_dir }}/kubeadm version -o short"
register: kubeadm_output
- name: sets kubeadm api version to v1alpha1
set_fact:
kubeadmConfig_api_version: v1alpha1
when: kubeadm_output.stdout is version('v1.11.0', '<')
- name: sets kubeadm api version to v1alpha2
set_fact:
kubeadmConfig_api_version: v1alpha2
when:
- kubeadm_output.stdout is version('v1.11.0', '>=')
- kubeadm_output.stdout is version('v1.12.0', '<')
- name: sets kubeadm api version to v1alpha3
set_fact:
kubeadmConfig_api_version: v1alpha3
when: kubeadm_output.stdout is version('v1.12.0', '>=')
# 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 | Create kubeadm config
template:
src: "kubeadm-config.{{ kubeadmConfig_api_version }}.yaml.j2"
dest: "{{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml"
register: kubeadm_config
- name: kubeadm | Initialize first master
command: timeout -k 600s 600s {{ bin_dir }}/kubeadm init --config={{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml --ignore-preflight-errors=all
register: kubeadm_init
# Retry is because upload config sometimes fails
retries: 3
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
notify: Master | restart kubelet
- name: kubeadm | Upgrade first master
command: >-
timeout -k 600s 600s
{{ bin_dir }}/kubeadm
upgrade apply -y {{ kube_version }}
--config={{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml
--ignore-preflight-errors=all
--allow-experimental-upgrades
--allow-release-candidate-upgrades
--force
register: kubeadm_upgrade
# Retry is because upload config sometimes fails
retries: 3
when: inventory_hostname == groups['kube-master']|first and (kubeadm_config.changed and kubeadm_already_run.stat.exists)
failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr
notify: Master | restart kubelet
# FIXME(mattymo): remove when https://github.com/kubernetes/kubeadm/issues/433 is fixed
- name: kubeadm | Enable kube-proxy
command: "{{ bin_dir }}/kubeadm alpha phase addon kube-proxy --config={{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml"
register: kubeadm_kube_proxy_enable
retries: 10
until: kubeadm_kube_proxy_enable is succeeded
when: inventory_hostname == groups['kube-master']|first
changed_when: false
- name: slurp kubeadm certs
slurp:
src: "{{ item }}"
with_items:
- "{{ kube_cert_dir }}/apiserver.crt"
- "{{ kube_cert_dir }}/apiserver.key"
- "{{ kube_cert_dir }}/apiserver-kubelet-client.crt"
- "{{ kube_cert_dir }}/apiserver-kubelet-client.key"
- "{{ kube_cert_dir }}/ca.crt"
- "{{ kube_cert_dir }}/ca.key"
- "{{ kube_cert_dir }}/front-proxy-ca.crt"
- "{{ kube_cert_dir }}/front-proxy-ca.key"
- "{{ kube_cert_dir }}/front-proxy-client.crt"
- "{{ kube_cert_dir }}/front-proxy-client.key"
- "{{ kube_cert_dir }}/sa.key"
- "{{ kube_cert_dir }}/sa.pub"
register: kubeadm_certs
delegate_to: "{{ groups['kube-master']|first }}"
run_once: true
- name: kubeadm | write out kubeadm certs
copy:
dest: "{{ item.item }}"
content: "{{ item.content | b64decode }}"
owner: root
group: root
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mode: 0600
no_log: true
register: copy_kubeadm_certs
with_items: "{{ kubeadm_certs.results }}"
when: inventory_hostname != groups['kube-master']|first
- name: kubeadm | Init other uninitialized masters
command: timeout -k 600s 600s {{ bin_dir }}/kubeadm init --config={{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml --ignore-preflight-errors=all
register: kubeadm_init
retries: 10
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
notify: Master | restart kubelet
- name: kubeadm | Upgrade other masters
command: >-
timeout -k 600s 600s
{{ bin_dir }}/kubeadm
upgrade apply -y {{ kube_version }}
--config={{ kube_config_dir }}/kubeadm-config.{{ kubeadmConfig_api_version }}.yaml
--ignore-preflight-errors=all
--allow-experimental-upgrades
--allow-release-candidate-upgrades
register: kubeadm_upgrade
when: inventory_hostname != groups['kube-master']|first and (kubeadm_config.changed and kubeadm_already_run.stat.exists)
failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr
notify: Master | restart kubelet
- name: kubeadm | Check service account key again
stat:
path: "{{ kube_cert_dir }}/sa.key"
register: sa_key_after
delegate_to: "{{groups['kube-master']|first}}"
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
- name: kubeadm | Remove taint for master with node role
command: "{{ bin_dir }}/kubectl taint node {{ inventory_hostname }} node-role.kubernetes.io/master:NoSchedule-"
delegate_to: "{{groups['kube-master']|first}}"
when: inventory_hostname in groups['kube-node']
failed_when: false