почти такой же вывод:
depth=0 CN = kube-apiserver
verify error:num=20:unable to get local issuer certificate
verify return:1
...
...
X509v3 Subject Alternative Name: X509v3 Subject Alternative Name:
DNS:kubernetes, DNS:kubernetes.default, DNS:kubernetes.default.svc, DNS:kubernetes.default.svc.cluster.local,
IP Address:
10.96.0.1, IP
IP Address:
192.168.5.4, IP Address:
192.168.5.55