How to clear Content Cache Policy content

Solution Verified - Updated -

Environment

  • Red Hat 3scale API Management
    • 2.X On-premises

Issue

  • How to clear content cache populated by APIcast Content Cache Policy

Resolution

The Content cache is stored in /tmp/cache directory in apicast.

$ oc rsh <apicast> 
sh-4.2$ ls /tmp/cache

A cache entry is stored in a file in the following directory tree structure

/tmp/cache/f/07/7ab20d614e88683e6e2a48ee3869f07f

There is a KEY stored along with the response in the file.

The cache entries can be cleared out using one the following

  1. Do a rollout of apicast pod. This will clear the cache i.e. empty the entire tree of cache entries in /tmp/cache.

  2. Wait for 10 mins. Cache entry will be removed regardless of it is expired or not. ONly the file ( leaf) is remove but directory structure will remain. In the above example, after 10 mins you will see the following

    /tmp/cache/f/07

  3. Search for an entry by KEY and remove manually.

Root Cause

How to clear content cache used by APIcast Content Cache Policy is not described in the documentation.

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