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Responding to an error report,

Check on status of heroku dynos

Using heroku CLI, run:

heroku ps -a scihist-digicoll-production

Is heroku itself having problems? Or are other platforms we use?

Restart heroku dynos

From heroku web GUI, you can restart all dynos from the “More” menu in top right navbar, choose “restart all dynos”.

Using the heroku CLI, you can restart only web or only workers, or even a specific dyno. 

heroku ps:restart worker -a scihist-digicoll-production
heroku ps:restart web -a scihist-digicoll-production
heroku ps:restart worker.2 -a scihist-digicoll-production

Note: It’s not clear to me how often this restarting heroku dynos will actually fix a problem, and in some cases it could cause a less stable state, if for instance heroku is having problems.

Restart solr on Searchstax

  1. Login to searchstax

    1. Use shared credentials stored in our credential spot

  2. Click on the instance you want to restart (scihist_digicoll (production), or scihist-digicoll-staging)

  3. At bottom of page there is a single node listed (our plan only has one node), you can click “stop solr”, and then “Start solr”

Disable autoscaling

We use http://hirefire.io for autoscaling our worker dynos (maybe in future web dynos). Has it gone crazy and you need to just disable it?

No worries, just login to http://hirefire.io (we each have our own login), and you can click the “enable” toggle on or off next to each autoscale worker, right on the initial dashboard. (We may only have one worker).

Put entire app into maintenance mode

Disable our app, it won’t be accessible to anyone, but they’ll get a nice maintainance message.

In heroku web GUI, go to “settings” tab, scroll down to “Maintenance mode” section, toggle switch.

In heroku CLI , run heroku maintenance:on -a scihist-digicoll-production and heroku maintenance:off -a scihist-digicoll-production

(Note: Right now, this is just a generic heroku maintenance message. It is possible to customize/brand this page, we may get to that eventually. https://github.com/sciencehistory/scihist_digicoll/issues/1201 )

Disable staff logins

We can effectively make the app “read-only” but still available to the public by disabling staff logins. So we don’t have a public facing outage, but if we’re dealing with some kind of data corruption issue we’re trying to diagnose, we might want to ‘freeze’ staff out.

In heroku config vars on heroku dashboard settings tab, just set LOGINS_DISABLED to true.

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