Need to run sh.stopBalancer() during mongosync process

MongoDB Percona Distribution for MongoDB
1

We are attempting to migrate our existing mongodb replicaset to a mongodb sharded replicaset.

We are doing a continous replication migration using mongosync Sync a Replica Set to a Sharded Cluster - MongoDB Cluster-to-Cluster Sync v1.13 - MongoDB Docs

However we are gettign the following error

{"success":false,"error":"APIError","errorDescription":"failed to confirm that the destination’s shard balancer does not affect migrated collections: detected unsupported balancer status: the destination cluster's balancer is turned on. See https://www.mongodb.com/docs/cluster-to-cluster-sync/current/reference/mongosync/mongosync-behavior/#cluster-and-collection-types for mongosync's balancer requirements and limitations"}

The documentation suggests we need to stop the balancer whilst the sync is happening - mongosync Behavior - MongoDB Cluster-to-Cluster Sync v1.13 - MongoDB Docs

However when i run sh.stopBalancer() it appears to apply momentarily but then gets reversed back ( monitoring sh.getBalancerState())

Im wondering if there is a limitation with percona mongodb preventing us from doing this?

2

Ah i just saw this - perhaps i need to disable it from here - percona-helm-charts/charts/psmdb-db/values.yaml at main · percona/percona-helm-charts · GitHub

3

correct, if the balancer is manually stopped but the Operator parameter has it enabled, then it will be restarted automatically by the Operator