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Play and Pause Resources with Manual Update Control

By default, Tilt watches your filesystem for edits and, whenever it detects a change affecting Resource X, triggers an update of that resource. All your local code, synced to your cluster as you edit it! What could be better?

Well, sometimes that's not what you want. Maybe updating Resource X takes a long time and so you only want to run updates when you're actually ready. Maybe you're about to check out a branch and don't want all the spurious file changes to launch a lot of updates. Whatever your reason, Manual Update Control is here to help.

The behavior described above is TriggerMode: Auto (Tilt's default); that is, updates are automatically triggered whenever Tilt detects a change to a relevant file.

There's another way of doing things: TriggerMode: Manual. Tilt will still monitor file changes associated with your resources, but instead of automatically rebuilding and/or deploying every time a relevant file changes, Tilt will simply indicate in the UI that files have changed, and give you a button that you can use to kick off the update.

Using TriggerMode

You can change the trigger mode(s) of your resources in your Tiltfile in two different ways:

  1. k8s_resource() has an optional arg, trigger_mode; for that specific resource, you can pass either TRIGGER_MODE_AUTO or TRIGGER_MODE_MANUAL.
  2. if you want to adjust all of your resource at once, call the top-level function trigger_mode() with one of those two constants. This sets the default trigger mode for all manifests. (You can still use k8s_resource() to set the trigger mode for individual manifests.)

Here are some examples:

k8s_resource('snack)  # TriggerMode = Auto by default
# TriggerMode = Manual
k8s_resource('snack, trigger_mode=TRIGGER_MODE_MANUAL)
# TriggerMode = Manual (default set above)

# TriggerMode = Auto (can override the above default
# for specific resources)
k8s_resource('bar', trigger_mode=TRIGGER_MODE_AUTO)

When you make changes to "snack", instead of them being automatically applied, Tilt will simply indicate unapplied changes by the asterisk to the right of snack in the sidebar. It will not automatically apply those changes. Instead, it will wait until you click the apply button to the left of snack.

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