Error generating must-gather: No available strategies to copy

Environment

• Red Hat OpenShift Container Platform (RHOCP)
  • 4
• oc CLI
• Must-gather

Issue

• During must-gather collection, log messages like the following ones are shown:

  gather output not downloaded: No available strategies to copy
  

  error: unable to download output from pod must-gather-XXXXX: No available strategies to copy
  

  Error running must-gather collection:
    unable to download output from pod must-gather-XXXXX: No available strategies to copy.
  

  WARNING: rsync command not found in path. Please use your package manager to install it.
  WARNING: cannot use tar: tar not available in container
  

• Running must-gather collection in Windows fails with the following message:

  WARNING: rsync command not found in path.  Download cwRsync for Windows and add it to your PATH.
  

Resolution

1. Install the rsync and/or tar tool on local system running the oc adm must-gather command. The packages on Red Hat Enterprise Linux are rsync and tar:

   $ sudo yum install rsync tar
   

   Note: for Windows machines, as explained in the copying files to and from containers documenation, the cwRsync client should be installed and added to the PATH.

2. Run the must-gather command to collect data:

   $ oc adm must-gather
   

Root Cause

The warning log is produced by the lack of the rsync and/or tar binary in the local machine where the oc adm must-gather command runs. It does not prevent the collection of the data, but the pulling of the data from the must-gather container.

More information about the execution and outcomes of oc adm must-gather can be found in the article must-gather copy strategies.

Diagnostic Steps

While collecting data with oc adm must-gather command the following warning log appears:

$ oc adm must-gather
[...]
error: unable to download output from pod must-gather-XXXXX: No available strategies to copy.
WARNING: rsync command not found in path. Please use your package manager to install it.
WARNING: cannot use tar: tar not available in container
WARNING: cannot use tar: tar not available in container
[must-gather-XXXXX] OUT gather output not downloaded: No available strategies to copy
[...]
    Error running must-gather collection:
      unable to download output from pod must-gather-XXXXX: No available strategies to copy.
[...]
ClusterOperators:
        All healthy and stable
[...]
error: unable to download output from pod must-gather-XXXXX: No available strategies to copy.

Check if rsync and/or tar are installed, for example in RHEL:

$ which rsync
/usr/bin/which: no rsync in (/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/[user]/.local/bin:/home/[user]/bin)
$ which tar
/usr/bin/which: no tar in (/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/[user]/.local/bin:/home/[user]/bin)

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