First of all perform reindex only when you have to. There is no need to do it regularly.
You can trigger reindex from REST API: https://docs.atlassian.com/jira/REST/server/#api/2/reindex-reindex
It's always worth questioning why you want to do this. There are some cases where it makes sense, but if you're doing it because your index is regularly going wrong, then this is absolutely the wrong thing to do.
There's a phrase "plastering over the cracks" - when your house is structurally unsound, cracks appear in the plaster as it gradually falls apart. If you "plaster over the cracks", your house might look ok to the eye, but you're hiding the fact that it's going to fall down soon.
So, if you're doing this because you're getting indexing errors a lot, you need to fix that, not pretend you don't have a massive problem.
We are undoubtedly in a position of having to do this weekly, and for performance and other organizational reasons it has to be hard reindexing each Saturday night at midnight. We are pushing our little VM to the limit and I lack the cash and authority to move to dedicated hardware at this time so...
I would rather not have to logon every Saturday night to start this hard reindex. We do have ScriptRunner if that helps, and I can schedule cron jobs.
Because at least some of our over a thousand project admins need changes.
Our little group supports them, they in turn support over 600 teams. In any given week there will be at least a few tweaks that are not easily isolated to the project, notwithstanding scope control of custom fields in the default field contexts.
Anyhow, I found a crude approach, though would rather handle authentication otherwise. With this I may have to regularly change the password for some admin account, cron it up late each week. The account under which JIRA runs is pretty restricted, but storing plaintext passwords is not a good thing - I have the same concern re dbconfig.cfg, by the way. Here's what I tested last night in nonprod:
curl -u [acct]:[password-of-week] -X POST https://[JIRA instance]/rest/api/2/reindex?type=FOREGROUND
We may find a better way, using centrally-controlled automation, but this works. From https://confluence.atlassian.com/jirakb/how-to-trigger-re-indexing-using-rest-request-via-curl-command-663617587.html.
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