Revision as of 18:39, October 21, 2016

Rolling back a migration

When you roll back a migration, you need to restore your data that you backed up before you started the migration. See How do I preserve my data through the migration?.

Start

Stop and disable auto-run on all new GWS nodes that were run during the migration.
```
chkconfig gws disable; service gws stop
```
Restore the Cassandra database from the snapshot you took before the migration. Detailed instruction depends on your Cassandra version and can be obtained here:
- http://docs.datastax.com/en/cassandra/1.2/cassandra/operations/ops_backup_snapshot_restore_t.html
- https://docs.datastax.com/en/cassandra_win/2.2/cassandra/operations/opsBackupSnapshotRestore.html
Enable the Jetty service on old nodes:
```
chkconfig jetty9 enable
```
Run GWS service on all old nodes
```
service jetty9 start
```

Enforce synchronization with ConfigServer via OPS API:

/api/v2/ops/genesys-environments/ON_PREMISE_ENVIRONMENT/synchronization

End

@@ Line 1: / Line 1: @@
 = Rolling back a migration=
+When you roll back a migration, you need to restore your data that you backed up before you started the migration. See [[MigPreparation#How_do_I_preserve_my_data_through_the_migration.3F|How do I preserve my data through the migration?]].
+'''Start'''
+<ol><li>Stop and disable auto-run on all new GWS nodes that were run during the migration.
+<source lang="text">chkconfig gws disable; service gws stop</source></li>
+<li>Restore the Cassandra database from the snapshot you took before the migration. Detailed instruction depends on your Cassandra version and can be obtained here:
+<ul><li>http://docs.datastax.com/en/cassandra/1.2/cassandra/operations/ops_backup_snapshot_restore_t.html
+<li>https://docs.datastax.com/en/cassandra_win/2.2/cassandra/operations/opsBackupSnapshotRestore.html</li></li></ul>
+<li>Enable the Jetty service on old nodes:
+<source lang="text">chkconfig jetty9 enable</source></li>
+<li>Run GWS service on all old nodes
+<source lang="text">service jetty9 start</source></li>
+<li>Enforce synchronization with ConfigServer via OPS API:
+<source lang="text">/api/v2/ops/genesys-environments/ON_PREMISE_ENVIRONMENT/synchronization</source> </li>
+'''End'''
 [[Category:V:HTCC:8.5.2DRAFT]]