AWS and DigitalOcean Cloud Infrastructure

When cloud infrastructure work fits best

Cloud infrastructure work fits best when an application needs a reliable, properly configured server but the current setup is either nonexistent, undocumented, or held together with manual steps. Typical scenarios include moving from a local development machine to a production VPS, migrating between providers such as DigitalOcean to AWS or vice versa, or stabilising an environment after a contractor hands it off. It also applies when DNS is misconfigured, SSL certificates keep expiring, or the firewall rules are either too permissive or too restrictive. If the team spends more time fighting the infrastructure than shipping product, the foundation needs attention before further feature work.

What a typical infrastructure engagement looks like

The engagement begins with a review of the application requirements, expected traffic, storage needs, and any existing cloud resources. We then provision or stabilise the compute instance, configure DNS records, set up a reverse proxy with SSL termination, and apply firewall rules that allow only what is necessary. Resource sizing is based on the actual application profile rather than guesswork, which means checking what the application needs for CPU, memory, disk I/O, and network throughput. After provisioning, we validate everything: DNS resolution, SSL certificate validity, proxy routing, health-check endpoints, and backup execution. The engagement closes with access credentials, a deployment checklist, and notes on how to resize, back up, and monitor the server.

• Application requirements review and resource sizing
• Compute provisioning, DNS, proxy, and SSL setup
• Firewall hardening and backup configuration
• Validation of DNS, SSL, health checks, and backups

Common pitfalls and how they are avoided

The most frequent infrastructure pitfall is provisioning a server without considering resource sizing, which leads to either wasted spend on an oversized instance or performance problems on an undersized one. We avoid this by reviewing the application runtime requirements before selecting an instance type. Another common issue is DNS misconfiguration, particularly when domain ownership is unclear or multiple DNS providers are involved. We verify DNS authority early to avoid deployment delays. Firewall misconfiguration is also common, either leaving default rules that block everything or opening ports that should remain closed. We apply a principle of least privilege and document every rule. Finally, skipping backup verification means the team discovers backups are broken only when they need them.

Security and access considerations

Cloud security starts with access control. We review who has console access to the cloud provider, who holds SSH keys, and whether API tokens are scoped appropriately. A common finding is a single root SSH key shared across the team, or a cloud console account with full administrative access used by everyone. Recommendations include creating individual SSH keys, disabling password-based authentication, restricting cloud console access to specific IP ranges, and enabling two-factor authentication on the provider account. At the infrastructure level, we configure UFW or the cloud provider firewall to allow only the ports the application actually needs. Unnecessary services, open database ports, and unused administrative interfaces are identified and closed.

Operational handover and runbooks

Infrastructure handover means the team can operate, scale, and troubleshoot the server without external help. This includes documenting how to log in, how to restart services, how to check disk usage, how to expand a volume, and how to update SSL certificates. We also provide a DNS management reference that lists every record, its purpose, and where it is managed. Backup documentation covers what is backed up, where it is stored, how to restore from a backup, and how to verify that backups are working. All handover materials are stored in a location the team already uses, such as the application repository or an internal wiki, rather than in a separate tool that gets forgotten.

Monitoring, validation, and rollback planning

After infrastructure provisioning, we validate that every component works as expected. This includes testing DNS resolution from multiple locations, verifying that SSL certificates are valid and will not expire unexpectedly, confirming that the reverse proxy routes traffic correctly to the application, and running a health-check request against the production URL. For rollback, we document the steps to revert DNS changes, remove a faulty firewall rule, or restore a server snapshot. If the engagement involves a migration from an existing server, we keep the old server running in parallel until the new environment is validated, with a documented cutover plan that includes a specific rollback trigger if the new environment fails acceptance checks.

Collaboration with your in-house team

Infrastructure work requires cooperation with the team that will own the server day-to-day. We review the existing access model, understand deployment workflows, and identify who is responsible for monitoring, backups, and incident response. If the team has limited Linux experience, we walk through basic server management tasks and provide reference commands. If the team already has operations capability, we focus on the infrastructure gaps and ensure our configuration choices align with their existing practices. We also discuss resource-cost trade-offs, so the team can make informed decisions about instance sizing and provider selection. The objective is infrastructure the team understands and can manage independently.

What good looks like after infrastructure setup

After a successful infrastructure engagement, the server should resolve DNS correctly from any location, serve the application over a valid SSL connection, and block all unnecessary network access. Backups should be running on a defined schedule with documented restoration steps. The team should know how to log in, check service health, restart the application, and expand resources when needed. Disk usage, memory, and CPU should be monitored with alerts configured for thresholds that matter to the application. Cloud console access should be scoped per individual with appropriate permissions. If the team can deploy, monitor, and troubleshoot the server without external help for routine issues, the infrastructure is in good shape.