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UniStack.
Cloud & DevOps Fixed scope

Zero-Downtime Deployment Migration

Move your application off single-server deploys onto blue-green releases, with health checks and automatic rollback.

Delivered in

14 working days

Revisions

One round, included

Ownership

Yours from day one

Overview

What this engagement is

If your release plan includes the phrase "at 2am on Sunday", this fixes it. We move your application to a deployment model where a new version starts, proves itself against health checks, and takes traffic only when it is ready — while the old version stays warm and reachable. Database migrations get the harder treatment: expand and contract, so schema changes never require the old and new code to disagree. We rehearse the whole thing in staging, including a deliberate failed release, before you use it for real.

Deliverables

What lands in your repositories

7 items
  • Blue-green or rolling deployment configured on ECS, Kubernetes or EC2
  • Health check endpoints implemented and tuned for real startup behaviour
  • Load balancer target group and connection draining configuration
  • Expand-and-contract migration pattern documented and applied to one release
  • Automatic rollback on failed health checks within a defined window
  • Deployment runbook including the manual override path
  • Rehearsed failure drill with your engineers watching

Outcomes

What changes once it ships

Releases happen during working hours with people awake to watch

A bad release is reversed in under two minutes without a database restore

Deployment stops being an event that needs a calendar invite

Process

How the 4 stages run

  1. 01

    Assess

    current deploy steps, downtime causes and database coupling are mapped

  2. 02

    Prepare

    health checks, migration pattern and infrastructure changes are built

  3. 03

    Rehearse

    staging release, then a forced failure to prove rollback works

  4. 04

    Cut over

    first production release run jointly with your team

Booked most often by

  • Products with users in more than one timezone
  • Teams whose release nights have become a recurring cost
  • Companies with uptime commitments in a customer contract

What we need from you

  • Access to the deployment environment and the application repository
  • Time from a developer who understands the database schema
  • One staging environment that mirrors production reasonably closely

These are collected in the technical brief that opens in your dashboard the moment payment clears. The clock starts when they arrive, not before.

Answers

Questions this engagement raises

Yes. The expand-and-contract pattern is exactly how single-database systems avoid downtime during schema changes.

Then we tune health checks and grace periods around that, and flag the startup time as something worth fixing separately.

Yes, where your load balancer and traffic volume make canaries meaningful. We will advise during the assessment.

This is engineering work, not a physical product — nothing ships and there is no stock to run out of. Delivery is to the working days stated above, into systems you control, and the refund terms set out what happens if we miss the date.

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Read the scope. Know the price. Start on Monday.

No discovery calls to find out a number, no statements of work that take three weeks to sign. Pick the engagement that matches the problem and we assign the engineers.

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