CapRover

CapRover is an open source, self-hosted platform-as-a-service (PaaS) that makes deploying applications, services, and databases on your own server as simple as a few clicks. Built on top of Docker and Nginx, CapRover provides an approachable web interface and a powerful CLI for managing application deployments without requiring deep DevOps expertise.

The core functionality of CapRover revolves around its app deployment system. Each application is containerized using Docker and deployed on the server with automatic configuration of the Nginx reverse proxy. CapRover handles the routing, load balancing, and SSL certificate provisioning automatically, so developers can focus on their application code rather than server configuration. Deploying a new application requires specifying a name and a Docker image or a Git repository, and CapRover handles the rest.

One-click apps are one of CapRover's most popular features. The CapRover marketplace includes ready-to-deploy configurations for dozens of popular services including WordPress, Ghost, Nextcloud, GitLab, Mattermost, Portainer, Bitwarden, Jitsi Meet, Discourse, Piwik, and many more. Each one-click app bundles the Docker configuration, environment variables, volume mounts, and port mappings needed to deploy the service correctly, enabling users to set up complex applications in seconds.

CapRover's CLI provides a deployment-focused workflow for developers. After installing the CLI and authenticating with a CapRover server, developers can deploy applications directly from the terminal with a single command. The captain-definition file in the project repository tells CapRover how to build and deploy the application, supporting custom Dockerfiles, pre-built Docker images, and directory-based builds. The CLI integrates naturally with CI/CD pipelines for automated deployments on Git push.

SSL certificate management through Let's Encrypt is built directly into CapRover. Each application can have its own custom domain with an automatically provisioned and renewed certificate. Wildcard subdomains can be configured to route traffic to different applications, enabling multi-tenant setups and preview environments. The built-in Nginx configuration handles certificate renewal without application downtime.

CapRover's cluster mode, powered by Docker Swarm, enables horizontal scaling across multiple servers. In cluster mode, additional worker nodes can be added to the cluster, and application replicas are distributed across nodes automatically. Persistent volumes are shared across nodes using network-attached storage, and load balancing is handled by the Swarm ingress routing mesh. This provides a straightforward path to high availability and horizontal scaling without the complexity of Kubernetes.

Database management in CapRover can be handled through the one-click app system, which includes ready-made configurations for PostgreSQL, MySQL, MariaDB, MongoDB, Redis, and other popular databases. Persistent data is stored in Docker volumes that survive container restarts and upgrades, and databases can be connected to application containers through CapRover's internal networking.

CapRover is an excellent choice for developers and small teams who want to self-host applications with the convenience of a managed PaaS but without the cost and vendor dependency that comes with proprietary cloud platforms.