Learn about Cilium with interactive courses

Deep dive into Cilium and its features with labs provided by companies within the Cilium ecosystem

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Migrating to Cilium

Migrating to Cilium from another CNI is a very common task. But how do we minimize the impact during the migration? How do we ensure pods on the legacy CNI can still communicate to Cilium-managed during pods during the migration? How do we execute the migration safely, while avoiding a overly complex approach or using a separate tool such as Multus? With the use of the new Cilium CRD CiliumNodeConfig, running clusters can be migrated on a node-by-node basis, without disrupting existing traffic or requiring a complete cluster outage or rebuild. In this lab, you will migrate your cluster from an existing CNI to Cilium. While we use Flannel in this simple lab, you can leverage the same approach for other CNIs.

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SCTP on Cilium

SCTP (Stream Control Transmission Protocol) is a transport-layer protocol used for communication between applications. It is similar to TCP, but it provides additional features such as multi-homing and message fragmentation. Applications that require reliable, ordered delivery of data, but also need the ability to handle multiple streams of data simultaneously can use SCTP. SCTP is primarily used by service providers and mobile operators. While SCTP support for Kubernetes Services, Endpoint and NetworkPolicy was introduced in Kubernetes 1.12, you still need a CNI to support it. Good news: basic support for SCTP was introduced in Cilium 1.13!