mirror of
https://github.com/kubernetes-sigs/kubespray.git
synced 2026-10-29 22:03:22 -02:30
48 lines
2.3 KiB
Django/Jinja
48 lines
2.3 KiB
Django/Jinja
#!/bin/bash
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echo "## Check Expiration before renewal ##"
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{{ bin_dir }}/kubeadm certs check-expiration
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days_buffer=7 # set a time margin, because we should not renew at the last moment
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# systemctl show reports an empty NextElapseUSecRealtime while the timer's unit is
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# running, so use the calendar spec to get the next scheduled run.
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next_time=$(LC_ALL=C systemd-analyze calendar "{{ auto_renew_certificates_systemd_calendar }}" | grep -oP 'Next elapse:\s*\K.*\S')
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if [ "${next_time}" == "" ] || [ "${next_time}" == "never" ]; then
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echo "## Skip expiry comparison due to fail to parse next elapse from systemd calendar,do renewal directly ##"
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else
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current_time=$(date +%s)
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target_time=$(date -d "${next_time} + ${days_buffer} days" +%s) # $next_time - $days_buffer days
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expiry_threshold=$(( ${target_time} - ${current_time} ))
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# super-admin.conf only exists on the node where "kubeadm init" ran, the other
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# control plane nodes see it as missing (residualTime 0). Don't let missing
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# certs force a renewal here, kubeadm can't renew them anyway.
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expired_certs=$({{ bin_dir }}/kubeadm certs check-expiration -o jsonpath="{range .certificates[?(@.residualTime<${expiry_threshold}.0)]}{.name}={.missing}{\"\n\"}{end}" | sed -n 's/=false$//p')
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if [ "${expired_certs}" == "" ];then
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echo "## Skip cert renew and K8S container restart, since all residualTimes are beyond threshold ##"
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exit 0
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fi
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echo "## Certificates to renew: ##"
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echo "${expired_certs}"
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fi
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echo "## Renewing certificates managed by kubeadm ##"
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{{ bin_dir }}/kubeadm certs renew all
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echo "## Restarting control plane pods managed by kubeadm ##"
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{% if container_manager == "docker" %}
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{{ docker_bin_dir }}/docker ps -af 'name=k8s_POD_(kube-apiserver|kube-controller-manager|kube-scheduler|etcd)-*' -q | /usr/bin/xargs {{ docker_bin_dir }}/docker rm -f
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{% else %}
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{{ bin_dir }}/crictl pods --namespace kube-system --name 'kube-scheduler-*|kube-controller-manager-*|kube-apiserver-*|etcd-*' -q | /usr/bin/xargs {{ bin_dir }}/crictl rmp -f
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{% endif %}
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echo "## Updating /root/.kube/config ##"
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cp {{ kube_config_dir }}/admin.conf /root/.kube/config
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echo "## Waiting for apiserver to be up again ##"
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until printf "" 2>>/dev/null >>/dev/tcp/127.0.0.1/{{ kube_apiserver_port | default(6443) }}; do sleep 1; done
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echo "## Expiration after renewal ##"
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{{ bin_dir }}/kubeadm certs check-expiration
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