update

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

@@ -0,0 +1,130 @@
+---
+# Wait for upgrade
+- name: Confirm node upgrade
+  pause:
+    echo: yes
+    prompt: "Ready to upgrade node? (Press Enter to continue or Ctrl+C for other options)"
+  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
+
+# Node Ready: type = ready, status = True
+# Node NotReady: type = ready, status = Unknown
+- name: See if node is in ready state
+  command: >
+    {{ kubectl }} get node {{ kube_override_hostname|default(inventory_hostname) }}
+    -o jsonpath='{ range .status.conditions[?(@.type == "Ready")].status }{ @ }{ end }'
+  register: kubectl_node_ready
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
+  failed_when: false
+  changed_when: false
+
+# SchedulingDisabled: unschedulable = true
+# else unschedulable key doesn't exist
+- name: See if node is schedulable
+  command: >
+    {{ kubectl }} get node {{ kube_override_hostname|default(inventory_hostname) }}
+    -o jsonpath='{ .spec.unschedulable }'
+  register: kubectl_node_schedulable
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
+  failed_when: false
+  changed_when: false
+
+- name: Set if node needs cordoning
+  set_fact:
+    needs_cordoning: >-
+      {% if (kubectl_node_ready.stdout == "True" and not kubectl_node_schedulable.stdout) or upgrade_node_always_cordon -%}
+      true
+      {%- else -%}
+      false
+      {%- endif %}
+
+- name: Node draining
+  block:
+    - name: Cordon node
+      command: "{{ kubectl }} cordon {{ kube_override_hostname|default(inventory_hostname) }}"
+      delegate_to: "{{ groups['kube_control_plane'][0] }}"
+      changed_when: true
+
+    - name: Check kubectl version
+      command: "{{ kubectl }} version --client --short"
+      register: kubectl_version
+      delegate_to: "{{ groups['kube_control_plane'][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: >-
+        {{ kubectl }} drain
+        --force
+        --ignore-daemonsets
+        --grace-period {{ hostvars['localhost']['drain_grace_period_after_failure'] | default(drain_grace_period) }}
+        --timeout {{ hostvars['localhost']['drain_timeout_after_failure'] | default(drain_timeout) }}
+        --delete-emptydir-data {{ kube_override_hostname|default(inventory_hostname) }}
+        {% if drain_pod_selector %}--pod-selector '{{ drain_pod_selector }}'{% endif %}
+      when: drain_nodes
+      register: result
+      failed_when:
+        - result.rc != 0
+        - not drain_fallback_enabled
+      until: result.rc == 0
+      retries: "{{ drain_retries }}"
+      delay: "{{ drain_retry_delay_seconds }}"
+
+    - name: Drain fallback
+      block:
+        - name: Set facts after regular drain has failed
+          set_fact:
+            drain_grace_period_after_failure: "{{ drain_fallback_grace_period }}"
+            drain_timeout_after_failure: "{{ drain_fallback_timeout }}"
+          delegate_to: localhost
+          delegate_facts: yes
+          run_once: yes
+
+        - name: Drain node - fallback with disabled eviction
+          command: >-
+            {{ kubectl }} drain
+            --force
+            --ignore-daemonsets
+            --grace-period {{ drain_fallback_grace_period }}
+            --timeout {{ drain_fallback_timeout }}
+            --delete-emptydir-data {{ kube_override_hostname|default(inventory_hostname) }}
+            {% if drain_pod_selector %}--pod-selector '{{ drain_pod_selector }}'{% endif %}
+            --disable-eviction
+          register: drain_fallback_result
+          until: drain_fallback_result.rc == 0
+          retries: "{{ drain_fallback_retries }}"
+          delay: "{{ drain_fallback_retry_delay_seconds }}"
+          changed_when: drain_fallback_result.rc == 0
+      when:
+        - drain_nodes
+        - drain_fallback_enabled
+        - result.rc != 0
+
+  rescue:
+    - name: Set node back to schedulable
+      command: "{{ kubectl }} uncordon {{ kube_override_hostname|default(inventory_hostname) }}"
+      when: upgrade_node_uncordon_after_drain_failure
+    - name: Fail after rescue
+      fail:
+        msg: "Failed to drain node {{ kube_override_hostname|default(inventory_hostname) }}"
+      when: upgrade_node_fail_if_drain_fails
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
+  when:
+    - needs_cordoning