- on `search1`
- stop puppet
- stop the objects and metadata journal clients
- upgrade the debian packages
- restart `swh-search` to declare the new field mapping in the old index
- restart puppet
- manually launch journal client configured to index on a `origin-v0.9` index
- wait for the end of the reindexation
- upgrade the new swh-search and journal client configurations in puppet to use the new index