Fixing WordPress Jetpack Connection Errors

I recently migrated my WordPress installation from an old Debian 8 Google Cloud instance to Debian 9. I decided to do the installation myself this time instead of using a Bitnami image for greater control. I couldn’t get certbot (a Let’s Encrypt client for free SSL certificates) to work on the Bitnami image so I figured I’d set everything up myself.

I ran into one problem that took me a while to debug and figure out. I relinked my site to Jetpack to get basic analytics and automatic sharing to LinkedIn, but Jetpack couldn’t communicate with my site.

… 

 

Apache Spark on Google Colaboratory

Google recently launched a preview of Colaboratory, a new service that lets you edit and run IPython notebooks right from Google Drive – free! It’s similar to Databricks – give that a try if you’re looking for a better-supported way to run Spark in the cloud, launch clusters, and much more.

Google has published some tutorials showing how to use Tensorflow and various other Google APIs and tools on Colaboratory, but I wanted to try installing Apache Spark. It turned out to be much easier than I expected. Download the notebook and import it into Colaboratory or read on…

… 

 

Apache Spark Cluster with Vagrant

New tiny GitHub project: https://github.com/mikestaszel/spark_cluster_vagrant

Over the past few weeks I’ve been working on benchmarking Spark as well as learning more about setting up clusters of Spark machines both locally and on cloud providers.

I decided to work on a simple Vagrantfile that spins up a Spark cluster with a head node and however many worker nodes desired. I’ve seen a few of these but they either used some 3rd party box, had an older version of Spark, or only spun up one node.

By running only one command I could have a fully-configured Spark cluster ready to use and test. Vagrant also easily extends beyond simple Virtualbox machines to many providers, including AWS EC2 and DigitalOcean and this Vagrantfile can be extended to provision clusters on those providers.

Check it out here: https://github.com/mikestaszel/spark_cluster_vagrant