Migrating from Odoo 8 to Odoo 18: The Ultimate Guide for Legacy ERP Modernization

By InfraNext – Your Trusted Odoo Partner  

Keywords: Odoo migration services, upgrade Odoo 8 to Odoo 18, legacy ERP modernization, custom module migration, InfraNext Odoo partner, Python 3 Odoo upgrade, OpenERP to Odoo 18, on-premise ERP upgrade

Why You Must Upgrade from Odoo 8 to Odoo 18

Odoo 8, released in 2014, is now end-of-life—lacking security patches, performance optimizations, and compatibility with modern infrastructure. Businesses still running Odoo 8 face:

•  ❌ Outdated Python 2 codebase

•  ❌ Insecure and deprecated modules

•  ❌ Poor performance on modern servers

•  ❌ Limited support for cloud-native deployment

Upgrading to Odoo 18 Community Edition unlocks:

•  ✅ Python 3.10+ compatibility

•  ✅ Lightning-fast UI and backend performance

•  ✅ Modular scalability and RESTful APIs

•  ✅ Enhanced security and compliance

•  ✅ Seamless integration with AWS, Azure, GCP

At InfraNext, we specialize in end-to-end Odoo migration services—from legacy code refactoring to full-stack deployment.

Step-by-Step Migration Blueprint

📁 Step 1: Audit Your Existing Odoo 8 Environment

Before touching a single line of code, we perform a deep technical audit:

•  Inventory all installed modules (core + custom)

•  Identify deprecated models, views, and controllers

•  Map third-party integrations and external dependencies

•  Analyze database schema and field usage

•  Document business-critical workflows and automation

🔍 Pro Tip: Use ir.module.module and ir.model.fields to extract module and field metadata.

Step 2: Set Up Odoo 18 Development Environment

We provision a containerized dev environment using Docker or Ansible:

•  Install Odoo 18 from source

•  Configure PostgreSQL 14+

•  Set up Python 3.10 virtualenv

•  Enable developer mode and logging

•  Integrate Git for version control and CI/CD pipelines

💡 Bonus: We deploy staging environments on AWS EC2 or Azure VMs for isolated testing.

Step 3: Refactor Custom Modules

Odoo 8 modules use legacy ORM and Python 2 syntax. We refactor:

•  osv.osv → models.Model

•  fields.function → @api.depends

•  Legacy XML views → QWeb templates

•  JS assets → Owl framework (if applicable)

We also rewrite:

•  Controllers (http.Controller)

•  Security rules (ir.model.access.csv)

•  Menu items and actions (ir.actions.*)

🔧 Tooling: We use 2to3, black, and custom linters to automate syntax upgrades.

Step 4: Migrate Database Schema and Records

We build custom migration scripts to:

•  Export data from Odoo 8 using XMLRPC or direct SQL

•  Transform schema to match Odoo 18 models

•  Import data using ORM or CSV loaders

•  Validate relational integrity and constraints

📊 Examples:

•  account.invoice → account.move

•  res.partner.category → res.partner.tag

•  sale.order.line fields remapped for new tax logic

Step 5: Test, Validate, and Harden

We run automated and manual tests to ensure:

•  ✅ Functional parity with legacy workflows

•  ✅ UI/UX consistency across modules

•  ✅ Performance benchmarks under load

•  ✅ Security compliance and access control

•  ✅ Integration with external APIs (e.g., payment gateways, CRMs)

🧬 CI/CD: We use Jenkins or GitHub Actions to automate test pipelines and rollback logic.

Step 6: Deploy to Production

Once validated, we deploy to production using:

•  🔐 Hardened Linux servers (Ubuntu 22.04 LTS)

•  🔄 Nginx reverse proxy with SSL

•  🧱 PostgreSQL with WAL archiving

•  📦 Docker or systemd-managed services

•  📈 Monitoring via Prometheus + Grafana

We also set up:

•  🔁 Daily backups with retention policies

•  📣 Notification hooks for errors and updates

•  🧩 Future-proofing for Odoo 19+ compatibility

Why Choose InfraNext for Your Odoo Migration?

At InfraNext, we don’t just migrate—we modernize. Our team of certified Odoo experts and DevOps engineers deliver:

•  🔄 Seamless migration from any legacy Odoo version

•  🧠 Intelligent refactoring of custom modules

•  ☁️ Cloud-native deployment on AWS, Azure, or GCP

•  🛡️ Security-first architecture and rollback logic

•  📞 Dedicated support and post-migration training

Whether you’re running a retail ERP, manufacturing suite, or custom CRM—InfraNext ensures your Odoo 18 upgrade is fast, secure, and future-ready.

Ready to Upgrade?

Let’s transform your legacy ERP into a modern powerhouse.  

📧 Email us at info@infranext.co  

🌐 Visit infranext.co  

📅 Book a free migration consultation today

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