Orchestration of the storage and network layer. Migration requires coordination of StatefulSet replicas, along with This feature provides a building block for a StatefulSet to be split up acrossĬlusters, but does not prescribe the mechanism as to how the StatefulSet shouldīe migrated. StatefulSet in the destination cluster is healthy with 6 total replicas. Redis StatefulSet in the source cluster is scaled to 0, and the Redis Repeat steps #5 to #7 for the remainder of the replicas, until the I should see that the new replica (labeled myself) has joined the RedisĬluster (the IP address belongs to a different CIDR block than the Within a range " | base64 -d) CLUSTER NODES " Kubernetes v1.26 enables a StatefulSet to be responsible for a range of ordinals You lose the self-healing benefit of the StatefulSet controller when your Pods To migrate individual pods, however this is error prone and tedious to manage. In today'sįully connected world, even planned application downtime may not allow you to Backup and restore solutions exist, but these require theĪpplication to be scaled down to zero replicas prior to migration. With Kubernetes today, orchestrating a StatefulSet migration across clusters isĬhallenging. Pods are created from ordinal index 0 up to N-1. StatefulSets ordinals provide sequential identities for pod replicas. This blog post will discuss how this feature can be Kubernetes v1.26 introduced a new, alpha-level feature for
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