I need modify email config in elasticsearch.yml,and I wantn't restart elasticsearch.Have some suggestions?
You can use the Cluster Update Settings API to update email settings as well.
if you need to change passwords, you can update the keystore on each node and then use the reload secure settings endpoint to reload.
Thanks,but my password didn't save in the keystore,can I use Cluster Update Settings APIto updade password?
This depends on the version. This possibility has been deprecated on 6.x, and removed on 7.x.
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