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Upload kubeadm ClusterConfiguration before the control plane upgrade (#13594)

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kubeadm upgrade reads ClusterConfiguration only from the kubeadm-config
ConfigMap, so it keeps the old etcd version. The etcd version then
changes on all control plane nodes at the same time, and the control
plane stops. Upload the ClusterConfiguration first. Then kubeadm
upgrades etcd on one node at a time.

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>
This commit is contained in:
Ali Afsharzadeh
2026-09-30 09:06:38 +00:00
committed by GitHub
parent ebf1560fc0
commit 15ea3a9bba
1 changed files with 10 additions and 0 deletions
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roles/kubernetes/control-plane/tasks/kubeadm-upgrade.yml
+10
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@@ -30,6 +30,16 @@
- inventory_hostname == first_kube_control_plane - inventory_hostname == first_kube_control_plane
- preflight_check_result.rc is defined and preflight_check_result.rc != 0 - preflight_check_result.rc is defined and preflight_check_result.rc != 0
# kubeadm upgrade reads ClusterConfiguration only from the kubeadm-config ConfigMap.
# Upload it first. Then kubeadm upgrades etcd on one node at a time.
- name: Kubeadm | Upload ClusterConfiguration before upgrade
command: "{{ bin_dir }}/kubeadm init phase upload-config kubeadm --config {{ kube_config_dir }}/kubeadm-config.yaml"
register: kubeadm_upload_cluster_config
retries: 3
until: kubeadm_upload_cluster_config.rc == 0
when:
- inventory_hostname == first_kube_control_plane
- name: Kubeadm | Upgrade first control plane node to {{ kube_version }} - name: Kubeadm | Upgrade first control plane node to {{ kube_version }}
command: >- command: >-
timeout -k 600s 600s timeout -k 600s 600s