[Bugs] [Bug 1248067] fuse mount fails with "failed to fetch volume file"

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1248067



--- Comment #16 from Kaushal <kaushal at redhat.com> ---
This is happening because bind-insecure is enabled by default in the rpc
library in 3.7.3.

The 3.7.3 clients attempt to connect to the 3.7.1 servers using insecure ports.
The older servers still expect incoming connections to use secure ports (unless
bind-insecure is turned on), and reject the connections from 3.7.3 clients.

Some solutions I can think of for this include,
- Turn bind-insecure off for clients by setting `client.bind-insecure` to `off`
for the volumes. This will force 3.7.3 clients to use secure ports to establish
the connection.

- Turn bind-insecure on for the bricks by setting `server.allow-insecure` to
`on` for the volumes. This will enable the older servers to accept connections
coming from insecure ports.

This had to be documented in the release-notes for 3.7.3, but I missed this
commit when preparing the notes.

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