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DevOps for the Desperate A Hands On Survival Guide 1st Edition by Bradley Smith ISBN 9781718502482 1718502486

Name: DevOps for the Desperate A Hands On Survival Guide 1st Edition by Bradley Smith ISBN 9781718502482 1718502486
SKU: EB-42077854
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DevOps for the Desperate A Hands On Survival Guide EARLY ACCESS 1st Edition Bradley Smith Digital Instant Download

Author(s): Bradley Smith

ISBN(s): 9781718502482, 1718502486

Edition: 1

File Details: PDF, 3.47 MB

Year: 2022

Language: English

SKU: EB-42077854 Category: Computers - Internet & World Wide Web Tag: Bradley Smith

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DevOps for the Desperate A Hands On Survival Guide 1st Edition by Bradley Smith – Ebook PDF Instant Download/Delivery: 9781718502482 ,1718502486
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Product details:
ISBN 10: 1718502486
ISBN 13: 9781718502482
Author: Bradley Smith

DevOps for the Desperate is a hands-on, no-nonsense guide for those who land in a DevOps environment and need to get up and running quickly. This book introduces fundamental concepts software developers need to know to flourish in a modern DevOps environment including infrastructure as code, configuration management, security, containerization and orchestration, monitoring and alerting, and troubleshooting. Readers will follow along with hands-on examples to learn how to tackle common DevOps tasks. The book begins with an exploration of DevOps concepts using Vagrant and Ansible to build systems with repeatable and predictable states, including configuring a host with user-based security. Next up is a crash course on containerization, orchestration, and delivery using Docker, Kubernetes, and a CI/CDpipeline. The book concludes with a primer in monitoring and alerting with tips for troubleshootingcommon host and application issues. You’ll learn how to: Use Ansible to manage users and groups, and enforce complex passwords Create a security policy for administrative permissions, and automate a host-based firewall Get started with Docker to containerize applications, use Kubernetes for orchestration, and deploycode using a CI/CD pipeline Build a monitoring stack, investigate common metric patterns, and trigger alerts Troubleshoot and analyze common issues and errors found on hosts

DevOps for the Desperate A Hands On Survival Guide 1st Edition Table of contents:

Part I: Infrastructure as code, Configuration management, security, and administration

Chapter 1: Setting Up a Virtual Machine

Why Use Code to Build Infrastructure?

Getting Started with Vagrant

Installation

Anatomy of a Vagrantfile

Basic Vagrant Commands

Getting Started with Ansible

Installation

Key Ansible Concepts

Ansible Playbook

Basic Ansible Commands

Creating an Ubuntu VM

Summary

Chapter 2: Using Ansible to Manage Passwords, Users, and Groups

Enforcing Complex Passwords

Installing libpam-pwquality

Configuring pam_pwquality to Enforce a Stricter Password Policy

Linux User Types

Getting Started with the Ansible User Module

Generating a Complex Password

Linux Groups

Getting Started with the Ansible Group Module

Assigning a User to the Group

Creating Protected Resources

Updating the VM

Testing User and Group Permissions

Summary

Chapter 3: Using Ansible to Configure SSH

Understanding and Activating Public Key Authentication

Generating a Public Key Pair

Using Ansible to Get Your Public Key on the VM

Adding Two-Factor Authentication

Installing Google Authenticator

Configuring Google Authenticator

Configuring PAM for Google Authenticator

Configuring the SSH Server

Restarting the SSH Server with a Handler

Provisioning the VM

Testing SSH Access

Summary

Chapter 4: Controlling User Commands with sudo

What Is sudo?

Planning a sudoers Security Policy

Installing the Greeting Web Application

Anatomy of a sudoers File

Creating the sudoers File

The sudoers Template

Provisioning the VM

Testing Permissions

Accessing the Web Application

Editing greeting.py to Test the sudoers Policy

Stopping and Starting with systemctl

Audit Logs

Summary

Chapter 5: Automating and Testing a Host-Based Firewall

Planning the Firewall Rules

Automating UFW Rules

Provisioning the VM

Testing the Firewall

Scanning Ports with Nmap

Firewall Logging

Rate Limiting

Summary

Part II: containerization and deploying modern applications

Chapter 6: Containerizing an Application with Docker

Docker from 30,000 Feet

Getting Started with Docker

Dockerfile Instructions

Container Images and Layers

Containers

Namespaces and Cgroups

Installing and Testing Docker

Installing the Docker Engine with Minikube

Installing the Docker Client and Setting Up Docker Environment Variables

Testing the Docker Client Connectivity

Containerizing a Sample Application

Dissecting the Example telnet-server Dockerfile

Building the Container Image

Verifying the Docker Image

Running the Container

Other Docker Client Commands

exec

inspect

history

stats

Testing the Container

Connecting to the Telnet-Server

Getting Logs from the Container

Summary

Chapter 7: Orchestrating with Kubernetes

Kubernetes from 30,000 Feet

Kubernetes Workload Resources

Pods

ReplicaSet

Deployments

StatefulSets

Services

Volumes

Secrets

ConfigMaps

Namespaces

Deploying the Sample telnet-server Application

Interacting with Kubernetes

Reviewing the Manifests

Creating a Deployment and Services

Viewing the Deployment and Services

Testing the Deployment and Services

Accessing the Telnet Server

Troubleshooting Tips

Killing a Pod

Scaling

Logs

Summary

Chapter 8: Deploying Code

CI/CD in Modern Application Stacks

Setting Up Your Pipeline

Reviewing the skaffold.yaml File

Reviewing the Container Tests

Simulating a Development Pipeline

Making a Code Change

Testing the Code Change

Testing a Rollback

Other CI/CD Tooling

Summary

Part III: Observability and troubleshooting

Chapter 9: Observability

Monitoring Overview

Monitoring the Sample Application

Installing the Monitoring Stack

Verifying the Installation

Metrics

Golden Signals

Adjusting the Monitoring Pattern

The telnet-server Dashboard

PromQL: A Primer

Alerts

Reviewing Golden Signal Alerts in Prometheus

Routing and Notifications

Summary

Chapter 10: Troubleshooting Hosts

Troubleshooting and Debugging: A Primer

Scenario: High Load Average

uptime

top

Next Steps

Scenario: High Memory Usage

free

vmstat

Next Steps

Scenario: High iowait

iostat

iotop

Next Steps

Scenario: Hostname Resolution Failure

resolv.conf

resolvectl

dig

Next Steps

Scenario: Out of Disk Space

find

lsof

Next Steps

Scenario: Connection Refused

curl

tcpdump

Next Steps

Searching Logs

Common Logs

Common journalctl Commands

Parsing Logs

Probing Processes

strace

Summary

Index

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