This is an interesting problem. So there are two strategies:
- When LXC adds an additional {G,U}ID mapping we could check whether this would
lead to more than 5 mappings being requested. And while I sympathize with that
I also dislike the fact that the in-kernel limit is arbitrary and I'm not sure
if we want to hardcode something that might change at any point. However, we
could maybe print the requested mapping count as debug info to the log.
- We find a workaround to only use the mapping for the host {G,U}ID in certain
operations where it is required that this {G,U}ID is mapped. I need to think
about that.
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https://bugs.launchpad.net/bugs/1692111
Title:
Unable to configure raw.id_map with multiple entries
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