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On the recordRead 3 Oct 202622 facts
Submariner
On the record
- Administrative requirements
- Deployment requires administrative setup, including configuring firewall rules in the underlying infrastructure.submariner.io · read 2 Oct 2026
- Audience
- Submariner is aimed at teams operating multiple Kubernetes clusters across clouds, data centers, or regions.submariner.io · read 3 Oct 2026
- Calico limitation
- Submariner is validated with Calico when it uses VXLAN encapsulation, and Calico requires configuration to avoid NAT on remote cluster subnets.submariner.io · read 2 Oct 2026
- Community support
- The project offers community help through GitHub, Kubernetes Slack, open community meetings, and user and developer mailing lists.submariner.io · read 2 Oct 2026
- Connectivity
- It provides cross-cluster Layer 3 connectivity using encrypted or unencrypted connections.submariner.io · read 2 Oct 2026
- Deployment
- Submariner is installed and managed through a Kubernetes Operator, with subctl and Helm charts as deployment tools; the docs recommend subctl.submariner.io · read 3 Oct 2026
- Deployment tool
- The project includes subctl, a command-line utility that simplifies deployment and management.submariner.io · read 2 Oct 2026
- External connectivity
- Access to external applications or endpoints outside Kubernetes is described as experimental and potentially less mature or stable than core features.submariner.io · read 2 Oct 2026
- High availability
- The Gateway Engine supports active/passive high availability, with standby instances ready to take over if the active instance fails.submariner.io · read 3 Oct 2026
- License
- Contributions to Submariner projects other than the website must be made available under Apache License 2.0.submariner.io · read 3 Oct 2026
- Limit
- Load Balancer mode is marked experimental and is not yet tested across all cloud providers or failover scenarios.submariner.io · read 3 Oct 2026
- Networking
- It provides cross-cluster Layer 3 connectivity using encrypted or unencrypted connections.submariner.io · read 3 Oct 2026
- Network plugins
- Submariner is designed to be CNI-agnostic and documents working alongside network plugins including Calico and Flannel.submariner.io · read 2 Oct 2026
- Open source
- The project describes Submariner as completely open source and network-plugin agnostic.submariner.io · read 3 Oct 2026
- Overlapping CIDRs
- Globalnet provides an optional way to connect clusters with overlapping CIDRs; by default, clusters need distinct, non-overlapping ServiceCIDR and ClusterCIDR ranges.submariner.io · read 3 Oct 2026
- Project status
- Submariner is a Cloud Native Computing Foundation sandbox project.submariner.io · read 2 Oct 2026
- Purpose
- Submariner connects Pods and Services across Kubernetes clusters on-premises or in the cloud.submariner.io · read 3 Oct 2026
- Security
- The Broker deployment generates a broker-info.subm file containing an API endpoint, CA certificate, service-account token, and random IPsec pre-shared key.submariner.io · read 3 Oct 2026
