Infrastructure as Code: Vorteile, Best Practices und führende Tools

Infrastructure as Code (IaC) ermöglicht Entwicklern, IT-Umgebungen mit wenigen Code-Zeilen zu provisionieren. Im Gegensatz zu manuellen Infrastructure-Setups, die Stunden oder Tage für Konfiguration benötigen, deployt ein IaC-System in Minuten.

Dieser Artikel erklärt Konzepte hinter Infrastructure as Code. Sie lernen, wie IaC funktioniert und wie automatische Konfigurationen Teams befähigen, Software mit höherer Geschwindigkeit und reduzierten Kosten zu entwickeln.

Was ist Infrastructure as Code (IaC)?

Infrastructure as Code ist der Prozess der Provisionierung und Konfiguration einer Umgebung durch Code statt manueller Einrichtung erforderlicher Devices und Systeme. Sind Code-Parameter definiert, führen Entwickler Scripts aus, und die IaC-Plattform baut die Cloud-Infrastruktur automatisch.

Solche automatischen IT-Setups ermöglichen Teams, schnell gewünschte Cloud-Settings für Test und Run ihrer Software zu erstellen. IaC erlaubt Entwicklern, jede benötigte Infrastrukturkomponente zu generieren: Networks, Load Balancer, Databases, Virtual Machines, Connection Types.

Wie Infrastructure as Code funktioniert

Schritt-für-Schritt-Erklärung, wie IaC-Umgebung erstellt wird:

1. Entwickler definiert Konfigurationsparameter in Domain-Specific Language (DSL).
2. Instruction Files werden an Master Server, Management API oder Code Repository gesendet.
3. IaC-Plattform folgt Entwickler-Instructions zum Erstellen und Konfigurieren der Infrastruktur.

Mit IaC müssen Nutzer Umgebung nicht jedes Mal konfigurieren, wenn sie Software entwickeln, testen, deployen. Alle Infrastrukturparameter werden als Dateien (Manifests) gespeichert.

Wie alle Code-Dateien: Manifests einfach zu Reuse, Edit, Copy, Share. Manifests machen Building, Testing, Staging, Deploying Infrastructure Quicker und Consistent.

Entwickler codifizieren Config Files, speichern in Version Control. Bei File-Edit: Pull Requests und Code Review Workflows prüfen Correctness der Changes.

Welche Probleme löst Infrastructure as Code?

IaC löst drei Hauptprobleme manueller Setups:

• Hoher Preis
• Langsame Installs
• Environment Inconsistencies

Hoher Preis

Manuelles Setup jedes IT-Environments ist teuer. Dedicated Engineers für Hardware/Software Setup nötig. Network/Hardware Techniker benötigen Supervisors → Mehr Management Overhead.

Mit IaC: Zentrale Managed Tool setzt Environment up. Pay Only For Consumed Resources, Quick Scale Up/Down.

Langsame Installs

Manuelles Infrastructure Setup: Engineers rack Servers First. Dann Manual Hardware/Network Config zu Desired Settings. Erst dann OS/Hosted Application Requirements Meet.

Prozess: Time-Consuming, Error-Prone. IaC reduziert Setup Time auf Minuten, automatisiert Prozess.

Environment Inconsistencies

Wenn Multiple People Manually Deploy Configurations → Inconsistencies Bound to Occur. Over Time: Difficult Track/Reproduce Same Environments. Inconsistencies → Critical Differences Dev/QA/Production Environments. Differences In Settings → Inevitably Deployment Issues.

IaC Ensures Continuity: Environments Provisioned/Configured Automatically – No Room für Human Error.

Rolle von Infrastructure as Code in DevOps

IaC Essential für DevOps. Agile Prozesse/Automation nur möglich mit Readily Available IT Infrastructure für Code Run/Test.

Mit IaC: DevOps Teams Enjoy Better Testing, Shorter Recovery Times, More Predictable Deployments – Vital für Quick-Paced Software Delivery. Uniform IT Environments Lower Chances Bugs in DevOps Pipeline.

IaC Approach No Limitations: DevOps Teams Provision All Aspects Needed Infrastructure. Engineers Create Servers, Deploy OS, Containers, App Configurations, Set Up Data Storage, Networks, Component Integrations.

IaC Kann mit CI/CD Tools Integrated Werden. Right Setup: Code Automatically Moves App Versions Between Environments für Testing.

Vorteile von Infrastructure as Code

Geschwindigkeit

Mit IaC: Teams Quickly Provision/Configure Infrastructure für Development, Testing, Production. Quick Setups Speed Up Entire Software Development Lifecycle.

Response Rate zu Customer Feedback Auch Faster. Developers Add New Features Quickly Without Waiting For More Resources. Quick Turnarounds zu User Requests → Improved Customer Satisfaction.

Standardisierung

Developers Rely On System Uniformity During Delivery Process. No Configuration Drifts (Situation: Different Servers Develop Unique Settings Due To Frequent Manual Updates). Drifts → Deployment Issues, Security Concerns.

IaC Prevents Configuration Drifts: Provisioning Same Environment Every Time Same Manifest Run.

Wiederverwendbarkeit

DevOps Teams Can Reuse Existing IaC Scripts In Various Environments. No Need Start From Scratch Every Time New Infrastructure Needed.

Kollaboration

Version Control Allows Multiple People Collaborate On Same Environment. Thanks To Version Control: Developers Work On Different Infrastructure Sections, Roll Out Changes Controlled Manner.

Effizienz

IaC Improves Efficiency/Productivity Across Development Lifecycle.

Programmers Create Sandbox Environments Für Development In Isolation. Operations Quickly Provision Infrastructure Für Security Tests. QA Engineers Have Perfect Copies Production Environments During Testing. Deployment Time: Developers Push Both Infrastructure And Code To Production In One Step.

IaC Also Keeps Track All Environment Build-Up Commands In Repository. Quickly Go Back To Previous Instance Or Redeploy Environment If Problem Encountered.

Geringere Kosten

IaC Reduces Software Development Costs. No Need Spend Resources On Manual Environment Setup.

Most IaC Platforms Offer Consumption-Based Cost Structure. Pay Only For Actively Used Resources → No Unnecessary Overhead.

Skalierbarkeit

IaC Makes Easy Add Resources To Existing Infrastructure. Upgrades Provisioned Quickly, Easily → Quick Expand During Burst Periods.

Beispiel: Organizations Running Online Services Easily Scale Up Für User Demands.

Disaster Recovery

Im Disaster Event: Easy Recover Large Systems Quickly With IaC. Just Re-Run Same Manifest → System Back Online At Different Location If Needed.

Infrastructure as Code Best Practices

Wenig bis Keine Dokumentation

Spezifikationen und Parameter in Config Files Definieren. Keine Additional Documentation, Die Out Of Sync Mit Configurations In Use Gerät.

Alle Konfigurationsdateien unter Version Control

All Config Files Unter Source Control Plazieren. Versioning Gibt Flexibility/Transparency Managing Infrastructure. Allows Track, Manage, Restore Previous Manifests.

Konfigurationen Konstant Testen

Test und Monitor Environments Before Pushing Changes To Production. Time Save: Automated Tests Setup Für Whenever Config Code Modified.

Modular Vorgehen

Infrastruktur In Multiple Components Dividieren, Dann Through Automation Kombinieren. IaC Segmentation Offers Many Advantages: Control Who Has Access To Certain Code Parts. Limit Number Of Changes To Manifests.

Infrastructure as Code Tools

IaC Tools Speed Up/Automate Provisioning Cloud Environments. Most Tools Also Monitor Previously Created Systems, Roll Back Code Changes.

Features Variieren, aber Zwei Main Types IaC Tools:

• Imperative Tools
• Declarative Tools

Imperative Approach Tools

Tools Mit Imperative Approach Definieren Commands Für Infrastructure Desired State. Engineers Create Scripts Provision Infrastructure One Step At A Time. Up To User Determine Optimal Deployment Process.

Imperative Approach Auch Known As Procedural Approach.

Verglichen Mit Declarative Approach Tools: Imperative IaC Requires More Manual Work. More Tasks Required Keep Scripts Up To Date.

Imperative Tools Better Fit Mit System Admins Mit Scripting Background.

const aws = require("@pulumi/aws"); let size = "t2.micro"; let ami = "ami-0ff8a91507f77f867" let group = new aws.ec2.SecurityGroup("webserver-secgrp", { ingress: [ {protocol: "tcp", fromPort: 22, toPort: 22, cidrBlocks: ["0.0.0.0/0"] }, ], }); let server = new aws.ec2.Instance("webserver-www", { instanceType: size, securityGroups: [ group.name ], ami: ami, }); exports.publicIp = server.publicIp; exports.publicHostName= server.publicDns;

Imperative IaC Beispiel (using Pulumi)

Declarative Approach Tools

Declarative Approach Beschreibt Desired State Of Infrastructure Without Listing Steps To Reach That State. IaC Tool Processes Requirements, Automatically Configures Necessary Software.

No Step-by-Step Instruction Needed, But Declarative Approach Requires Skilled Administrator For Setup/Management.

Declarative Tools Catered Towards Users With Strong Programming Experience.

resource "aws_instance" "myEC2" { ami = "ami-0ff8a91507f77f867" instance_type = "t2.micro" security_groups = ["sg-1234567"] }

Declarative Infrastructure as Code Beispiel (using Terraform)

Beliebte IaC Tools

Meist Genutzte Infrastructure as Code Tools Am Markt:

• Terraform: Open-Source Declarative Tool Mit Pre-Written Modules – Populate With Parameters To Build/Manage Infrastructure.
• Pulumi: Main Advantage: Users Rely On Favorite Language Für Desired Infrastructure Description.
• Puppet: Puppet's Ruby-Based DSL: Define Desired State, Tool Auto-Creates Environment.
• Ansible: Model Infrastructure By Describing How Components/Systems Relate To One Another.
• Chef: Most Popular Imperative Tool. Chef: Users Make „Recipes“ und „Cookbooks“ Using Ruby-Based DSL. Files Specify Exact Steps Für Desired Environment.
• SaltStack: Simplicity Of Provisioning/Configuring Infrastructure Components Sets Apart.

Wettbewerbsfähig Bleiben: IaC Ist Nicht Optional

Infrastructure as Code: Effektiver Weg, Rapid Pace Current Software Development Mitzuhalten. In Zeit, Wo IT Environments Daily Built, Changed, Torn Down → IaC Requirement Für Any Team Wishing To Stay Competitive.

PhoenixNAP's Bare Metal Cloud Platform Supports API-Driven Provisioning Of Servers. Fully Integrated Mit Ansible Und Terraform – Two Leading IaC Tools.

Mehr Über Bare Metal Cloud Erfahren Und Wie Es Organisations-IaC-Bemühungen Vorantreiben Kann.