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kubeadm setup: enhance retry with etcd error ignore #13169

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kubeadm setup: enhance retry with etcd error ignore #13169

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100b911
kubeadm setup: enhance retry with etcd ignore preflight check
shaleenbathla Apr 14, 2026
fc38719
control-plane/kubeadm-secondary: improve retry for join control plane…
shaleenbathla Apr 17, 2026
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45 changes: 37 additions & 8 deletions roles/kubernetes/control-plane/tasks/kubeadm-secondary.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -84,17 +84,46 @@
- not kubeadm_already_run.stat.exists

- name: Joining control plane node to the cluster.
command: >-
{{ bin_dir }}/kubeadm join
--config {{ kube_config_dir }}/kubeadm-controlplane.yaml
--ignore-preflight-errors={{ kubeadm_ignore_preflight_errors | join(',') }}
--skip-phases={{ kubeadm_join_phases_skip | join(',') }}
vars:
kubeadm_join_control_plane_cmd: >-
{{ bin_dir }}/kubeadm join
--config {{ kube_config_dir }}/kubeadm-controlplane.yaml
--ignore-preflight-errors={{ _ignore_errors | flatten | join(',') }}
--skip-phases={{ kubeadm_join_phases_skip | join(',') }}
_ignore_errors: "{{ kubeadm_ignore_preflight_errors }}"
environment:
PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}"
register: kubeadm_join_control_plane
retries: 3
throttle: 1
until: kubeadm_join_control_plane is succeeded
block:
- name: Joining control plane node to the cluster (1st try)
command: "{{ kubeadm_join_control_plane_cmd }}"
register: kubeadm_join_control_plane
rescue:
# Retry is because join sometimes fails
# This retry task is separated from 1st task to show log of failure of 1st task.
- name: Joining control plane node to the cluster (retry)
command: "{{ kubeadm_join_control_plane_cmd }}"
vars:
_errors_from_first_try:
- 'FileAvailable--etc-kubernetes-kubelet.conf'
- 'FileAvailable--etc-kubernetes-bootstrap-kubelet.conf'
- 'Port-10250' # kubelet
- 'FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml'
- 'Port-10257' # kube-controller-manager
- 'FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml'
- 'Port-10259' # kube-scheduler
- 'FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml'
- 'Port-{{ kube_apiserver_port }}'
- "{{ 'FileAvailable--etc-kubernetes-manifests-etcd.yaml' if etcd_deployment_type == 'kubeadm' else '' }}"
- "{{ 'DirAvailable--var-lib-etcd' if etcd_deployment_type == 'kubeadm' else '' }}"
- "{{ 'Port-2379' if etcd_deployment_type == 'kubeadm' else '' }}" # etcd client
- "{{ 'Port-2380' if etcd_deployment_type == 'kubeadm' else '' }}" # etcd peer
_ignore_errors:
- "{{ kubeadm_ignore_preflight_errors }}"
- "{{ _errors_from_first_try if 'all' not in kubeadm_ignore_preflight_errors else [] }}"
register: kubeadm_join_control_plane
retries: 2
until: kubeadm_join_control_plane is succeeded
when:
- inventory_hostname != first_kube_control_plane
- kubeadm_already_run is not defined or not kubeadm_already_run.stat.exists
Expand Down
9 changes: 8 additions & 1 deletion roles/kubernetes/control-plane/tasks/kubeadm-setup.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -198,10 +198,17 @@
command: "{{ kubeadm_init_first_control_plane_cmd }}"
vars:
_errors_from_first_try:
- 'Port-10250' # kubelet
- 'FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml'
- 'Port-10257' # kube-controller-manager
- 'FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml'
- 'Port-10259' # kube-scheduler
- 'FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml'
- 'Port-10250'
- 'Port-{{ kube_apiserver_port }}'
- "{{ 'FileAvailable--etc-kubernetes-manifests-etcd.yaml' if etcd_deployment_type == 'kubeadm' else '' }}"
- "{{ 'DirAvailable--var-lib-etcd' if etcd_deployment_type == 'kubeadm' else '' }}"
- "{{ 'Port-2379' if etcd_deployment_type == 'kubeadm' else '' }}" # etcd client
- "{{ 'Port-2380' if etcd_deployment_type == 'kubeadm' else '' }}" # etcd peer
_ignore_errors:
- "{{ kubeadm_ignore_preflight_errors }}"
- "{{ _errors_from_first_try if 'all' not in kubeadm_ignore_preflight_errors else [] }}"
Expand Down