Temporary location issue with project duplicate or "save as"

[grossmj]

In some situation, users can run out of space because projects are stored on a different disk than the default temporary location (e.g. /tmp). GNS3 uses this temporary location when duplicating projects (because we use this Python module: https://docs.python.org/3.8/library/tempfile.html), therefore duplicating a huge project can lead the temporary location disk to reach 100% of used space.

https://gns3.com/community/discussion/duplicate-or-save-as-issues

[dllegru]

+1
Was running out of space in my root partition when duplicating a project. Didn't know where it was coming from until I found out about this.
Managed to bypass it by setting a bind mountpoint for /tmp to another partition.

Would be great to parametrize the GNS3 temp directory in the GNS3 server configuration file.

[grossmj]

Solved and back-ported to 2.2 branch.