How Do You Use Google’s Cloud Pub/Sub with Python?

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Problem scenario
You want to use a Data Analytics or a Big Data tool that publishes messages and subscribes to listening to messages being published. You know GCP has a Pub/Sub tool. You know it supports synchronous and asynchronous messaging. How do you use it with Python?

Solution

  1. Log into GCP via the web UI.
  2. Go here: https://console.cloud.google.com/cloudpubsub/
  3. Click “Create Topic”.

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How Do You Install RabbitMQ Server on Any Distribution of Linux?

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Problem scenario
You want to install RabbitMQ on any distribution of Linux using the same script. How do you write such a script?

Solution

1.a. If you are using SUSE or a Red Hat deriviative of Linux (e.g., CentOS/RHEL/Fedora), go to step #2.

1.b. If you are using Debian or Ubuntu Linux, read the following. There may be manual steps (often three steps with Ubuntu 18.04 in AWS).

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How Do You Create a Node.js Application to Be Presentable and Usable via a Docker Container?

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Problem scenario
You want to create a basic “Hello World” web page with Node.js running in a Docker container.  How do you do this?

Solution
Prerequisite
Install Docker.  If you need assistance, see this posting.

Procedures
1.  Create three files in the same directory on a Linux server. 

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How Do You Secure a Docker Container, a Docker Host, and Their Network?

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Problem Scenario
You have been tasked with finding ways of securing Docker containers, a Docker host, and your network that has Docker containers.  How do you harden a Docker container and its related infrastructure (i.e., the Docker network and Docker host)?

Solution
Overview
From a pragmatic perspective we understand that there are exceptions to the recommended practices.  (Not the least of which is the rapid rate that technology changes.)  The assertions below are recommended practices. 

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How Do You Troubleshoot Azure Template Files?

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Problem scenario
You are having problems with your ARM templates (the .json files).  You want to learn more techniques at troubleshoot ARM templates. What should you do?

Possible Solution #1   Follow these directions on Microsoft’s website.
(You will need to download a .psm1 file and use the import-module command in PowerShell.)

Possible Solution #2
Clone this Git repo and use it to validate your ARM templates:  https://github.com/Azure/azure-arm-validator

Possible Solution #3
Substitute any very sensitive data from the JSON with dummy (fake or random) data. 

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How Do You Create the PowerShell Script, the Template.json and the Parameters.json Necessary to Utilize ARM?

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Problem scenario
To use ARM templates you know know you should have three text files: 1) a PowerShell script 2) a template.json file and 3) a parameters.json file.

How do you create these for a given resource (e.g., a storage account, VM, or Function App)?

Solution
1.  In the Azure Portal web UI, start the process of creating a resource.  Right before you click “Create”,

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How Do You Use an ARM Template to Create an Azure Serverless Function App?

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Problem scenario
As a proof-of-concept you want to use an ARM template to create an Azure Function that uses Azure storage.  You want the template to create the Azure storage account as it is a dependency of the Azure Serverless Function (also known as an App Service).  How do you do this?

Overview
This will create an Azure Function also known as an App Service. 

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How Do You Create a PowerShell Script to Create a Storage Account in Azure?

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Problem scenario
You want to use an ARM template via a PowerShell script to create a storage account in Azure.  How do you do this?

Solution
Prerequisites
1.  If you are using Windows 7, you have installed Azure PowerShell; if you need assistance with this, see this posting.  If you are using Windows 10, you have installed the modules for Azure and the storage resource;

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How Do You Find the Data Type of a Variable in an Ansible Playbook?

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Problem scenario
Through the register keyword you assign a variable.  You want to know what variable type it is (e.g., a string, a dictionary or a JSON).  You know the data type is not a Boolean.  What do you do?

Solution
If you have a variable (e.g., foobar) and you want to know what data type it is, do this:

debug:
  msg:
when:  foobar.stdout == “”

The playbook will tell you if foobar is a dictionary with an error. 

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