John Hanley

Security, software development and devops in a cloud world

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Google Cloud Private DNS Zones

On October 23, 2018, Google introduced private DNS zones for Google Cloud DNS. This is an important announcement as this keeps internal DNS names private. Today’s article covers how to implement this new feature in Google Cloud Platform. Update: May… Continue Reading →

Google Cloud Billing Catalog API

Google Cloud supports a Cloud Billing Catalog API. I have not worked with this API yet. Today, I plan to experiment. Documentation page to get started with Google Cloud Platform Pricing: Get Google Cloud Platform Pricing Information This API requires… Continue Reading →

Google Cloud – Debian 9 – Resize Root File System

In Google Cloud I often use Debian 9 Stretch for my test instances. Today I was wondering if this OS automatically resizes the root file system if I resize the VM instance disk. I also want to see if this… Continue Reading →

Comparing AWS & Google – IP Packet Forwarding

When you configure an instance that will forward packets, you need to change an option. The option name depends on the cloud vendor. Example usage would be a VPN, or NAT instance. Normally an instance is source or destination for… Continue Reading →

Let’s Encrypt – Debian 9 on Google Compute Instance

Let’s Encrypt is a Certificate Authority (CA) that issues free SSL certifications. I have used these certificates on web servers, cloud functions, load balancers, and many more. In this article I will show how to obtain an SSL certificate from… Continue Reading →

Windows Command Prompt – Loading a File into a Variable

Often I need to load the content of a file into a Windows Command Prompt variable. This is useful when writing batch scripts where the return value from one program is used as input for another program. At other times… Continue Reading →

Google Compute – Install Stackdriver

Note: I have written a newer version of this article that goes much deeper into setting up Google Stackdriver on Compute Engine. Google Compute – Stackdriver Logging – Installation, Setup & Debugging Google Stackdriver is a very good product for… Continue Reading →

Google Compute – Startup Script Total Execution Time

I have been testing Google Compute VM instances with custom startup scripts. I wanted to figure out how long my startup scripts were taking to initialize an instance. The VM instance has Debian 9 Stretch as the OS. Knowing the… Continue Reading →

Understanding Google Cloud Storage Scopes

Google Cloud Storage uses scopes to determine what permissions an identity has on a specified resource. Google scopes are formatted as urls. There are three basic types: read-only, read-write and full-control. read-only Only allows access to read data, including listing… Continue Reading →

CURL SSL Certificate Problem

Part 1 – The CURL command-line program If curl is not set up correctly for SSL (HTTPS) data transfers an error is displayed. The error message starts like this: curl: (60) SSL certificate problem: unable to get local issuer certificate… Continue Reading →

Hello Cloud World!

October 13, 2018. Welcome to my new blogging site where I will publish my articles on software development for the cloud. I support AWS, Alibaba, Azure, Google, and IBM. Languages C/C++, Python, PHP, Java/Scala, JavaScript/Node.js and C#/.NET. I prefer to… Continue Reading →

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