DevOps Automation Cookbook

DevOps Automation Cookbook

By : Michael Duffy

Buy this Book

DevOps Automation Cookbook

By: Michael Duffy

Buy this Book

Overview of this book

There has been a recent explosion in tools that allow you to redefine the delivery of infrastructure and applications, using a combination of automation and testing to deliver continuous deployment. DevOps has garnered interest from every quarter, and is rapidly being recognized as a radical shift, as large as the Agile movement for the delivery of software. This book takes a collection of some of the coolest software available today and shows you how to use it to create impressive changes to the way you deliver applications and software. It tackles the plethora of tools that are now available to enable organizations to take advantage of the automation, monitoring, and configuration management techniques that define a DevOps-driven infrastructure. Starting off with the fundamental command-line tools that every DevOps enthusiast must know, this book will guide you through the implementation of the Ansible tool to help you facilitate automation and perform diverse tasks. You will explore how to build hosts automatically with the creation of Apt mirrors and interactive pre-seeds, which are of the utmost importance for Ubuntu automation. You will also delve into the concept of virtualization and creating and manipulating guests with ESXi. Following this, you will venture into the application of Docker; learn how to install, run, network, and restore Docker containers; and also learn how to build containers in Jenkins and deploy apps using a combination of Ansible, Docker, and Jenkins. You will also discover how to filter data with Grafana and the usage of InfluxDB along with unconventional log management. Finally, you will get acquainted with cloud infrastructure, employing the Heroku and Amazon AWS platforms. By tackling real-world issues, this book will guide you through a huge variety of tools, giving new users the ability to get up and running and offering advanced users some interesting recipes that may help with existing issues.

DevOps Automation Cookbook

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

Free Chapter

Basic Command Line Tools

Introduction

Controlling network interfaces

Monitoring network details with the IP command

Monitoring connections using the ss command

Gathering basic OS statistics

Viewing historical resource usage with SAR

Installing and configuring a Git client

Creating an SSH key for Git

Using ssh-copy-id to copy keys

Creating a new Git repository

Cloning an existing Git repository

Checking changes into a Git repository

Pushing changes to a Git remote

Creating a Git branch

Ad Hoc Tasks with Ansible

Introduction

Installing an Ansible control node on Ubuntu

Installing an Ansible control node on CentOS

Creating an Ansible inventory

Using the raw module to install python-simplejson

Installing packages with Ansible

Restarting services using Ansible

Executing freeform commands with Ansible

Managing users with Ansible

Managing SSH keys with Ansible

Automatic Host builds

Introduction

Creating an Apt mirror using aptly

Automated installation using PXE boot and a Preseed file

Automating post-installation tasks

Virtualization with VMware ESXi

Introduction

Installing ESXi

Installing and using the vSphere Client

Allowing SSH access to ESXi

Creating a new guest

Allocating resources to a guest

Using the ESXi command line to start, stop, and destroy guests

Managing command-line snapshots

Tuning the host for guest performance

Automation with Ansible

Introduction

Installing Ansible

Creating a scaffold Playbook

Creating a common role

Creating a webserver using Ansible and Nginx

Creating an application server role using Tomcat and Ansible

Installing MySQL using Ansible

Installing and managing HAProxy with Ansible

Using ServerSpec to test your Playbook

Containerization with Docker

Introduction

Installing Docker

Pulling an image from the public Docker registry

Performing basic Docker operations

Running a container interactively

Creating a Dockerfile

Running a container in detached mode

Saving and restoring a container

Using the host only network

Running a private Docker registry

Managing images with a private registry

Using Jenkins for Continuous Deployment

Introduction

Installing Jenkins

Installing the Git plugin

Installing a Jenkins slave

Creating your first Jenkins job

Building Docker containers using Jenkins

Deploying a Java application to Tomcat with zero downtime using Ansible

Metric Collection with InfluxDB

Introduction

Installing InfluxDB

Creating a new InfluxDB database

Logging events with the InfluxDB REST API

Gathering host statistics with Telegraf

Exploring data with the InfluxDB data explorer

Installing Grafana

Creating dashboards with Grafana

Log Management

Introduction

Centralizing logs with Syslog

Using syslog templates

Managing log rotation with the Logrotate utility

Installing ElasticSearch, Logstash, and Kibana

Importing logs into Elasticsearch with Logstash

Using Kibana queries to explore data

Using Kibana queries to examine data

Monitoring with Sensu

Introduction

Installing a Sensu server

Installing a Sensu client

Installing check prerequisites

Finding community checks

Adding a DNS check

Adding a disk check

Adding a RAM check

Adding a process check

Adding a CPU check

Creating e-mail alerts

Creating SMS alerts

Using Ansible to install Sensu

IAAS with Amazon AWS

Introduction

Signing up for AWS

Setting up IAM

Creating your first security group

Creating your first EC2 host

Using Elastic Load Balancers

Managing DNS with route53

Using Ansible to create EC2 hosts

Application Performance Monitoring with New Relic

Introduction

Signing up for a New Relic account

Installing the New Relic Java agent

Using the performance overview

Locating performance bottlenecks with Transaction Traces

Observing database performance with New Relic

Release performance monitoring with New Relic

Server Monitoring with New Relic

Index

Customer Reviews

5 star

4 star

3 star

2 star

1 star

Monitoring connections using the ss command

Alongside the IP command, we also have the ss command (Socket Statistics). This command is the perfect replacement for the netstat command and offers more functionality, it is also faster and gives results that are more accurate.

The following recipes offer some alternatives that should allow you to replace the venerable netstat command.

Getting ready

No additional configuration should be required as the IP tools come preinstalled in major Linux distributions (RHEL and Debian based).

How to do it…

Let's monitor network details using the ss command:

You can use the following command to show established TCP connections:
```
ss -t
```
This should produce an output similar to the following screenshot:
Alternatively, if you want to see UDP connections rather than TCP, then you can do so using the following command:
```
$ ss -u
```
You can use the following command to see which ports are listening for connections on a server:
```
$ ss -ltn
```
This displays the following listening ports in the output:
The column we are interested in is the one titled Local Address:Port. This essentially lists the listening IP address and the TCP port it is listening on. If you see a *, it means that the port is available on all interfaces configured on this server.
Tip
The n in the -ltn option turns off hostname lookups. This makes the command run much faster, but you may want to omit it if you wish to see the hostname that an interface maps to.
Alternatively, you can use the same command to list all the listening UDP connections:
```
$ ss -lun
```
You can even combine the t and u flags to list out ALL listening ports, both UDP and TCP:
```
$ ss -ltun
```

DevOps Automation Cookbook

By : Michael Duffy

DevOps Automation Cookbook

By: Michael Duffy

Overview of this book

Related Content you might be interested in

Current Title:

DevOps Automation Cookbook

Monitoring connections using the ss command

Getting ready

How to do it…

Tip