So the reason why this happens is that internally the id mapping you
requested will look like this:
NSID HOSTID RANGE
0 1000000 999
999 999 1
1000 1001000 1
1001 1001 1
1002 1001002 999998998
However, the mappings don't include a mapping for UID 0 with which LXD
sets up the container. LXC will internally add the missing mapping for
UID 0 which means you are trying to write 6 mappings to the
corresponding files in proc. But user namespaces currently enforce a
limit of 5 limits.
** Changed in: lxd (Ubuntu)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1692111
Title:
Unable to configure raw.id_map with multiple entries
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