romeokienzler

Creating Let's Encrypt certificates for IBM free Kubernetes clusters

The IBM Kubernetes service free clusters consist of a single worker node with 2 CPU and 4 GB of memory for experimenting with Kubernetes. Unlike the fee-based service, these clusters do not include capabilities for application load balancing using ingress out-of-the-box. However, if you manage a DNS domain (any provider will suffice) and can add an A record, it's possible for you to configure your own ingress that can provide http and https session termination for your containerized applications. Getting a TLS-enabled website or simply an external REST API couldn't be easier!

Prerequisites

• Free IBM Kubernetes Cluster (IKS) - upgrade your account from Lite plan to create one. In the example commands, we'll assume that this cluster is named mycluster
• kubectl - match your cluster API version (as of 12/5/20 - this is ~1.18.12)
• helm v3
• DNS domain that you can edit to configure

romeokienzler

from pyspark.sql import SparkSession
spark = SparkSession\
        .builder\
        .appName("PythonPi")\
        .getOrCreate()

df = spark.createDataFrame(
    [
        (1, "foo"),  # create your data here, be consistent in the types.
        (2, "bar"),

romeokienzler

romeokienzler

romeokienzler

romeokienzler

romeokienzler

romeokienzler

Keybase proof

I hereby claim:

• I am romeokienzler on github.
• I am romeokienzler (https://keybase.io/romeokienzler) on keybase.
• I have a public key ASCIe9UOcVrE40I6t0U__zZykv3S5WhmNUT6k-a-hF9Z7Qo

To claim this, I am signing this object:

romeokienzler

romeokienzler

/* 

Not putting any comments, just follow this excellent tutorial
https://www.pagedon.com/rsa-explained-simply/programming

Some more credits:
https://gist.github.com/krzkaczor/0bdba0ee9555659ae5fe
https://www.pagedon.com/modular-exponentiation/programming

*/