Login into your Kubernetes master and add this /etc/ssh/sshd_config
KexAlgorithms [email protected],diffie-hellman-group1-sha1
Ciphers [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr
MACs [email protected],[email protected],[email protected],hmac-sha1,hmac-md5,hmac-sha1-96,hmac-md5-96
After it restart ssh
systemctl restart ssh
systemctl restart sshd