c12s-kubespray/roles/upgrade/pre-upgrade/tasks/main.yml

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---
# Wait for upgrade
- name: Confirm node upgrade
pause:
echo: yes
prompt: "Ready to upgrade node ?"
when:
- upgrade_node_confirm
- name: Wait before upgrade node
pause:
seconds: "{{ upgrade_node_pause_seconds }}"
when:
- not upgrade_node_confirm
- upgrade_node_pause_seconds != 0
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# Node Ready: type = ready, status = True
# Node NotReady: type = ready, status = Unknown
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- name: See if node is in ready state
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shell: >-
{{ bin_dir }}/kubectl get node {{ kube_override_hostname|default(inventory_hostname) }}
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-o jsonpath='{ range .status.conditions[?(@.type == "Ready")].status }{ @ }{ end }'
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register: kubectl_node_ready
delegate_to: "{{ groups['kube-master'][0] }}"
failed_when: false
changed_when: false
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# SchedulingDisabled: unschedulable = true
# else unschedulable key doesn't exist
- name: See if node is schedulable
shell: >-
{{ bin_dir }}/kubectl get node {{ kube_override_hostname|default(inventory_hostname) }}
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-o jsonpath='{ .spec.unschedulable }'
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register: kubectl_node_schedulable
delegate_to: "{{ groups['kube-master'][0] }}"
failed_when: false
changed_when: false
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- name: Set if node needs cordoning
set_fact:
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needs_cordoning: >-
{% if kubectl_node_ready.stdout == "True" and not kubectl_node_schedulable.stdout -%}
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true
{%- else -%}
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false
{%- endif %}
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- name: Node draining
block:
- name: Cordon node
command: "{{ bin_dir }}/kubectl cordon {{ kube_override_hostname|default(inventory_hostname) }}"
delegate_to: "{{ groups['kube-master'][0] }}"
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- name: Check kubectl version
command: "{{ bin_dir }}/kubectl version --client --short"
register: kubectl_version
delegate_to: "{{ groups['kube-master'][0] }}"
run_once: yes
changed_when: false
when:
- drain_nodes
- drain_pod_selector
- name: Ensure minimum version for drain label selector if necessary
assert:
that: "kubectl_version.stdout.split(' ')[-1] is version('v1.10.0', '>=')"
when:
- drain_nodes
- drain_pod_selector
- name: Drain node
command: >-
{{ bin_dir }}/kubectl drain
--force
--ignore-daemonsets
--grace-period {{ drain_grace_period }}
--timeout {{ drain_timeout }}
--delete-local-data {{ kube_override_hostname|default(inventory_hostname) }}
{% if drain_pod_selector %}--pod-selector '{{ drain_pod_selector }}'{% endif %}
when:
- drain_nodes
rescue:
- name: Set node back to schedulable
command: "{{ bin_dir }}/kubectl --kubeconfig /etc/kubernetes/admin.conf uncordon {{ inventory_hostname }}"
- name: Fail after rescue
fail:
msg: "Failed to drain node {{ inventory_hostname }}"
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delegate_to: "{{ groups['kube-master'][0] }}"
when:
- needs_cordoning