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# k3s
a
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[root@prod-server-k3s-01 bin]# for i in `ls /var/lib/rancher/k3s/server/tls/*.crt`; do echo $i; openssl x509 -enddate -noout -in $i; done
/var/lib/rancher/k3s/server/tls/client-admin.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-auth-proxy.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-ca.crt
notAfter=Apr 11 13:27:21 2033 GMT
/var/lib/rancher/k3s/server/tls/client-ca.nochain.crt
notAfter=Apr 11 13:27:21 2033 GMT
/var/lib/rancher/k3s/server/tls/client-controller.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-k3s-cloud-controller.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-k3s-controller.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-kube-apiserver.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-kube-proxy.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/client-scheduler.crt
notAfter=Apr 13 14:21:45 2025 GMT
/var/lib/rancher/k3s/server/tls/request-header-ca.crt
notAfter=Apr 11 13:27:21 2033 GMT
/var/lib/rancher/k3s/server/tls/server-ca.crt
notAfter=Apr 11 13:27:21 2033 GMT
/var/lib/rancher/k3s/server/tls/server-ca.nochain.crt
notAfter=Apr 11 13:27:21 2033 GMT
/var/lib/rancher/k3s/server/tls/serving-kube-apiserver.crt
notAfter=Apr 13 14:21:45 2025 GMT
please help identify whats causing this
Found a similar issue on rancher forum without solution 😞 https://forums.rancher.com/t/k3s-certificate-has-expired/37836
k3s version v1.25.16+k3s4 (ddda2476)
Found it. It was ArgoCD authentication requests. I had to re-add the cluster to Argo's config