kubeasz/playbooks/93.upgrade.yml

# WARNING: Upgrade the k8s cluster can be risky. Make sure you know what you are doing.
# Read the guide: 'op/upgrade.md' .
# Usage: ezctl upgrade <cluster_name>

# check k8s version
- hosts: kube_master
  tasks:
  - name: get running k8s version
    shell: "{{ bin_dir }}/kube-apiserver --version"
    register: RUNNING_VER
    run_once: true

  - name: print running version
    debug: var="RUNNING_VER.stdout"
    run_once: true

  - name: get update version
    shell: "{{ base_dir }}/bin/kube-apiserver --version"
    register: UPDATE_VER
    run_once: true
    connection: local

  - name: print update version
    debug: var="UPDATE_VER.stdout"
    run_once: true

  - name: check version
    fail: msg="running version is the same as the update version, UPDATE ABORT."
    when: "RUNNING_VER.stdout == UPDATE_VER.stdout"

# update masters
- hosts: 
  - kube_master
  roles:
  - kube-master
  - kube-node

# update nodes
- hosts: 
  - kube_node
  roles:
  - { role: kube-node, when: "inventory_hostname not in groups['kube_master']" }