Update change_kube_certificates.md
# Process of changing certificates on kube cluster
+## Kubernetes v1.15
+
+```
+# Check the expiration
+kubeadm certs check-expiration
+
+# It's also possible to renew specific certs only, instead of all
+# Check `kubeadm certs renew --help`
+kubeadm certs renew all
+
+# Restart kube containers
+systemctl stop docker
+systemctl stop kubelet
+systemctl start docker
+systemctl start kubelet
+
+# Renew auth tokens for the Cloud Pipeline API
+\cp /etc/kubernetes/admin.conf /root/.kube/config
+# Copy /root/.kube/config to all the API nodes
+```
+
+## Kubernetes v1.7.5
+
There is a script to backup old one and generate new one certificates for kube cluster
In order to change certificates:
- Copy this script to some file on kube master node
