Devstack forum doesn't start cleanly after make pull

Description

We often see devstack forums errors like this after pulling a new forum image:

How to reproduce

See that the ruby app did not start cleanly:

Workaround

...and then restart the forum container.

Note that I've seen this happen even when having the most recent version of cs_comments_service checked out in my devstack directory. Brian Beggs and I have taken a quick, informal look at this before - it looked like the ansible forum scripts did the right thing, but maybe it needs another look. The problem is that a bundle install never happened in the freshly pulled image.

Requirements
Determine where we need to fix this, either in configuration or in devstack, and then fix it.

Steps to Reproduce

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Current Behavior

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Expected Behavior

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Reason for Variance

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Release Notes

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User Impact Summary

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Status

Assignee

Unassigned

Reporter

Alex Dusenbery

Reach

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Impact

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Platform Area

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Customer

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Partner Manager

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URL

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Contributor Name

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Groups with Read-Only Access

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Actual Points

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Category of Work

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Platform Map Area (Levels 1 & 2)

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Platform Map Area (Levels 3 & 4)

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Priority

CAT-3
Configure