Change Details

As we migrate from Elastic -> OpenSearch, we need to ban the OpenSearch hosts before they exist. That's because primary shards hosted by OpenSearch nodes cannot replicate to Elasticsearch nodes. However, our current ban cookbook can't ban any nodes that aren't already in the cluster. Creating this ticket to: [] update the ban cookbook so it can ban hosts that aren't already in the cluster [] confirm operation

As we migrate from Elastic -> OpenSearch, we need to ban the OpenSearch hosts before they exist. That's because primary shards hosted by OpenSearch nodes cannot replicate to Elasticsearch nodes. However, our [[ https://gerrit.wikimedia.org/r/plugins/gitiles/operations/cookbooks/+/refs/heads/master/cookbooks/sre/elasticsearch/ban.py | current ban cookbook ]] can't ban any nodes that aren't already in the cluster. Creating this ticket to: [] update the ban cookbook so it can ban hosts that aren't already in the cluster [] confirm operation

As we migrate from Elastic -> OpenSearch, we need to ban the OpenSearch hosts before they exist. That's because primary shards hosted by OpenSearch nodes cannot replicate to Elasticsearch nodes. However, our current ban cookbook[[ https://gerrit.wikimedia.org/r/plugins/gitiles/operations/cookbooks/+/refs/heads/master/cookbooks/sre/elasticsearch/ban.py | current ban cookbook ]] can't ban any nodes that aren't already in the cluster. Creating this ticket to: [] update the ban cookbook so it can ban hosts that aren't already in the cluster [] confirm operation