https://docs.openshift.com/container-platform/4.16/scalability_and_performance/recommended-performance-scale-practices/recommended-etcd-practices.html#move-etcd-different-disk_recommended-etcd-practices
 
Docs reference invalid 0755
 
storage:
      files:
        - path: /etc/find-secondary-device
          mode: 0755
          contents:
            source: data:text/plain;charset=utf-8;base64,<encoded_etc_find_secondary_device_script>
    This value per ignition spec should be numeric and is referenced as a string above.
 

    I think it's at least 4.16 and back to 4.12

    Each time, ignition is invalid.


https://coreos.github.io/ignition/configuration-v3_4/
mode (integer): the file's permission mode. Note that the mode must be properly specified as a decimal
 value (i.e. 0644 -> 420). Setuid/setgid/sticky bits are supported. 
If not specified, the permission mode for files defaults to 0644 or the 
existing file's permissions if overwrite is false, contents is unspecified, and a file already exists at the path.

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    Should be a different numeric value