Air-Gapped Deployments: How to Deploy to Servers Without Internet Access (Complete Guide)

Deploying applications in air-gapped environments, which are isolated from the public internet, is essential for high-security networks and regulated industries, but it poses challenges due to the reliance of modern CI/CD pipelines on constant online access to external resources. To address this, the guide outlines strategies such as creating self-contained artifacts during the CI process, using private package registries, transferring Docker images offline, and employing immutable infrastructure with pre-configured machine images. These methods ensure reliable deployments without internet access by eliminating the need to pull dependencies or call external APIs at runtime. Proper secret management and networking patterns, like using bastion hosts for controlled access, are also crucial for maintaining security in these setups. By adopting these practices, organizations can achieve more predictable releases, enhanced security, and operational efficiency, while reducing deployment failures and improving scalability across different environments.