Agencies managing several client websites need an infrastructure approach that balances cost efficiency, isolation between clients, and manageable administration overhead. This guide covers common patterns.
Single VPS, Multiple Sites (Shared Server Approach)
Host multiple client sites on one VPS using virtual hosts — see Nginx Virtual Hosts: Hosting Multiple Websites or Apache Virtual Hosts: Hosting Multiple Websites.
Pros: Cost-efficient, simpler to manage a single server.
Cons: A resource-heavy or compromised site can potentially impact others on the same server; a single point of failure affects all clients simultaneously.
One VPS Per Client (Isolated Approach)
Each client gets a dedicated VPS.
Pros: Complete isolation — a problem with one client's site never affects another; easier to bill costs directly to specific clients.
Cons: Higher total cost and more servers to individually maintain and secure.
Docker-Based Isolation on Shared Infrastructure (Middle Ground)
Run each client's site in its own Docker container on shared VPS infrastructure — provides meaningful isolation between sites without the cost of fully separate servers. See How to Install Docker Engine on Ubuntu & Debian and Docker Networking Explained.
Recommended Approach by Agency Size
| Agency Size | Recommended Approach |
|---|---|
| Small (few low-traffic client sites) | Single VPS with virtual hosts |
| Medium (growing client base, mixed traffic) | Docker-based isolation on shared infrastructure |
| Large (many clients, enterprise requirements) | Dedicated VPS per client, or per client tier |
Standardizing Your Deployment Process
Regardless of approach, document and standardize your deployment workflow across all client sites — consistent server configuration, backup schedules, and security practices reduce operational risk and make onboarding new team members easier.
Client Site Isolation Checklist
- Separate database and database user per client
- Separate system user or container per client where feasible
- Individual SSL certificates per domain
- Client-specific backup schedules and retention
Backup Strategy for Multiple Clients
Automate backups per client site individually rather than one combined backup, making it possible to restore a single client's data without affecting others. See How to Set Up Automated VPS Backups.
Security Considerations Specific to Agencies
- A compromise on one client site shouldn't be able to spread to others — proper isolation (separate users, containers, or servers) is critical
- Keep all client software (CMS, plugins, dependencies) updated consistently across your entire portfolio
- Consider centralized monitoring across all managed servers to catch issues proactively
Billing Clients for Hosting
Many agencies mark up hosting costs as part of their service offering — factor in your own time for server maintenance when pricing hosting as a line item, not just the raw VPS cost.
FAQ
How many client sites can realistically run on one VPS?
Depends heavily on each site's traffic and resource needs — a handful of low-traffic brochure sites can comfortably share a modest VPS, while resource-intensive e-commerce sites warrant more isolation.
Related Articles
- Nginx Virtual Hosts: Hosting Multiple Websites
- How to Install Docker Engine on Ubuntu & Debian
- How to Set Up Automated VPS Backups (rsync, cron & Off-Site Storage)
