tldr - powered by Generative AI

• Multi-cluster services provide a way to uniquely identify replicas across clusters and discover endpoints.
• Staple set slices allow for granular control over replica ordinal and scaling in complementary fashion.
• Coordinating building blocks and migrating dependencies are necessary for cross-cluster migration.
• Challenges of cross-cluster migration include managing multiple Kubernetes control planes and client-side Quorum.
• Stateful workloads require unique solutions for cross-cluster migration.
• An anecdote is provided about the complexity of migrating a metrics datastore between Kubernetes clusters.

tldr - powered by Generative AI

• 70% of people using Kubernetes have at least some stateful workflows
• 90% think Kubernetes is ready for stateful workloads
• Steps to put databases on Kubernetes: understand Kubernetes primitives, pick a storage provider, pick a database, find an operator
• Kubernetes primitives for compute, network, and storage
• Persistent volume subsystem for mounting volumes of various types
• Importance of finding an operator for popular databases

tldr - powered by Generative AI

• Local PersistentVolumes can be tricky to operate at scale
• Various options for using local volumes are explored
• Important operational gotchas are discussed to ensure proper use of local volumes and stateful workloads
• Persistent volumes have a direct one-to-one relationship with pods in stateful sets
• There is a trade-off between using network-attached volumes and local volumes based on performance and cost