Allow relative paths in CCC_PLAY_MOUNTS

Detail name	Value
Changelog Number	21376
Type	Improvement
Status	Resolved
Fix Versions	Exasol 8.31.0, Exasol 8.29.1
Resolution Date	2024-07-29

Background

Exasol 8.29.0 introduced the CCC_PLAY_MOUNTS deployment option for c4 tool (see Exasol Deployment Tool (c4)), which allows specifying additional paths that are bind-mounted into the Exasol environment as a list of colon-separated pairs of paths, e.g.

CCC_PLAY_MOUNTS="/host/path:/mnt/exasol/path /host/path\ with\ whitespace:/mnt/other_path" c4 config -F -e .play.mounts
[
  "/host/path:/mnt/exasol/path",
  "/host/path with whitespace:/mnt/other_path"
]

Improvement

In Exasol 8.29.0 it was not specified how relative host paths were handled and they were treated as relative to an internal installation directory.

This has been changed and relative paths are now treated as relative to the home directory of the user that is starting Exasol on the node. So for example for a user with home directory /home/exasol_usr,

CCC_PLAY_MOUNTS="my_mount:/mnt/host_mount"

would mount /home/exasol_usr/my_mount on the host to /mnt/host_mount inside the Exasol namespace.

Changed behavior

Relative paths in c4 deployment option "CCC_PLAY_MOUNTS" are now treated as relative to the home directory of the user that is starting Exasol on the node.