New to Searchlight? Please start here.

Certificate

This article shows you how to generate SSL certificates using openssl or easyrsa.

openssl

openssl can also be use to manually generate certificates for your cluster.

  1. Set HOST_IP ENV to host IP

  2. Generate a ca.key with 2048bit:

    openssl genrsa -out ca.key 2048
    
  3. According to the ca.key generate a ca.crt

    openssl req -x509 -new -nodes -key ca.key -subj "/CN=${HOST_IP}" -days 10000 -out ca.crt
    
  4. Generate a server.key with 2048bit

    openssl genrsa -out server.key 2048
    
  5. According to the server.key generate a server.csr:

    openssl req -new -key server.key -subj "/CN=${HOST_IP}" -out server.csr
    
  6. According to the ca.key, ca.crt and server.csr generate the server.crt:

    openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -days 10000
    

easyrsa

easyrsa can be used to manually generate certificates for your cluster.

  1. Download, unpack, and initialize the patched version of easyrsa3.

    curl -L -O https://storage.googleapis.com/kubernetes-release/easy-rsa/easy-rsa.tar.gz
    tar xzf easy-rsa.tar.gz
    cd easy-rsa-master/easyrsa3
    ./easyrsa init-pki
    
  2. Set HOST_IP ENV to Kubernetes host IP

  3. Generate a CA. (–batch set automatic mode. –req-cn default CN to use.)

    ./easyrsa --batch "--req-cn=${HOST_IP}@`date +%s`" build-ca nopass
    
  4. Generate server certificate and key

    ./easyrsa --subject-alt-name="IP:${HOST_IP}" build-server-full kubernetes-master nopass
    

Acknowledgement

This documentation is adapted from kubernetes.io.

Take your team where it needs to go.

Create your cluster in minutes. Our team is here to help and would be happy to chat with you.