savishy

export PATH=$PATH:/opt/homebrew/bin:/opt/homebrew/opt/python@3/libexec/bin
export CLICOLOR=1
export LSCOLORS=GxFxCxDxBxegedabagaced

savishy

Layers

(From the Pluralsight course)

• Presentation Layer
  • showing data to and accepting input from end users
• Service Layer
  • BFF (Backend for Frontend) or API Gateway.
  • Single point of entry for all outside traffic.
• Present stable API to Presentation Layer, and allow μs to change independent of frontend.

savishy

Azure Solutions Architect

Module: Design for Security

Defense in Depth

My notes from going through https://docs.microsoft.com/en-us/learn/modules/design-for-security-in-azure/

• Zero trust model: Never assume trust, but continually validate it.

  • E.g. don't assume that because a request came from inside the network it can be trusted.
  • This approach enforces "Defense in Depth".

• Azure Security Center provides a solution to implement security and mitigate threats.

savishy

Naked Switch Statements

	switch {
	case x > 100:
		fmt.Println("x is very big")
	case x > 10:
		fmt.Println("x is big")
	default:
 fmt.Println("x is small")

savishy

[defaults]

# Search path for inventory plugin
inventory_plugins = ./inventory/

[inventory]
# enable plugin
enable_plugins = oneopsplugin, host_list, script, auto, yaml, ini

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LogStash

Logstash

• Originally started off as a log collector. Has become unifying point for disparate data sources.
• LS serves as the data ingestion point for ElasticSearch (ES).

Dead Letter Queues

• "Dead Letter Queues" in Logstash protect against data loss - ref

savishy

Key	Value
Main Build Scripts	build.gradle - project and tasks configuration. settings.gradle - useful in multi-project builds. gradle.properties - key-valuen pair containing build properties.
Projects, Tasks	A Build contains one or more Projects that are composed of Tasks. Multi-Project builds need to have a top level settings.gradle describing all the projects that are part of the build.
Tasks	Similar to Maven Goals. E.g. Compile / Run etc.
Plugins	Gradle Plugins can make new tasks available to a project. Syntax: apply plugin: 'foo' apply plugin: 'com.foo.bar'

gradle tasks - list all tasks available to project.

savishy

S3

VPC

Subnets

• Public Subnets can send traffic directly to internet

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DevOps Automation Task - Ansible + Azure + Windows

Objectives

1. This assignment requires you to automate creation of an entire application environment on Azure.
2. The environment consists of two VMs, details of which are enclosed below.
3. All VMs are Windows VMs.
4. Each VM needs to have specific disks attached to it, in addition to the C: D: E: drives.

Time Limit

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Enable Debug Logging if you want to see verbose logs.

https://blogs.technet.microsoft.com/heyscriptingguy/2014/10/16/use-powershell-and-dsc-to-enable-logging/ You can also enable Debug and Analytic logs in Windows Event Logging. https://blogs.msdn.microsoft.com/powershell/2014/01/03/using-event-logs-to-diagnose-errors-in-desired-state-configuration/

How do I kill a running DSC process?

E.g. if you want to reapply a DSC resource

rm C:\windows\system32\Configuration\*.mof*