Unit-testing often fails due to a race condition while writing the
clusterMappingConfigFile from multiple go-routines at the same time.
Failures from `make containerized-test` look like this:
=== CONT TestGetClusterMappingInfo/site2-storage_cluster-id_mapping
cluster_mapping_test.go:153: GetClusterMappingInfo() = <nil>, expected data &[{map[site1-storage:site2-storage] [map[1:3]] [map[11:5]]} {map[site3-storage:site2-storage] [map[8:3]] [map[10:5]]}]
=== CONT TestGetClusterMappingInfo/site3-storage_cluster-id_mapping
cluster_mapping_test.go:153: GetClusterMappingInfo() = <nil>, expected data &[{map[site3-storage:site2-storage] [map[8:3]] [map[10:5]]}]
--- FAIL: TestGetClusterMappingInfo (0.01s)
--- PASS: TestGetClusterMappingInfo/mapping_file_not_found (0.00s)
--- PASS: TestGetClusterMappingInfo/mapping_file_found_with_empty_data (0.00s)
--- PASS: TestGetClusterMappingInfo/cluster-id_mapping_not_found (0.00s)
--- FAIL: TestGetClusterMappingInfo/site2-storage_cluster-id_mapping (0.00s)
--- FAIL: TestGetClusterMappingInfo/site3-storage_cluster-id_mapping (0.00s)
--- PASS: TestGetClusterMappingInfo/site1-storage_cluster-id_mapping (0.00s)
By splitting the public GetClusterMappingInfo() function into an
internal getClusterMappingInfo() that takes a filename, unit-testing can
use different files for each go-routine, and testing becomes more
predictable.
Signed-off-by: Niels de Vos <ndevos@redhat.com>
added helper function to read the clusterID mapping
from the mounted file.
The clusterID mapping contains below mappings
* ClusterID mappings (to cluster to which we are failingover
and from which cluster failover happened)
* RBD PoolID mapping of between the clusters.
* CephFS FscID mapping between the clusters.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
