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

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---
- name: Cordon node
command: kubectl cordon {{ ansible_hostname }}
delegate_to: "{{ groups['kube-master'][0] }}"
- name: Drain node
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command: kubectl drain --force --ignore-daemonsets --grace-period 30 --delete-local-data {{ ansible_hostname }}
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delegate_to: "{{ groups['kube-master'][0] }}"
- name: Sleep for grace period for draining
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pause: seconds=30