It's going to use some caps (opening files, mmap'ing them, shared memory,
etc). I don't know what maps to which specific thing.
That error looks like an omission on my part..
mmap_fd = open(file, O_RDWR|O_CREAT, S_IRWXU);
if (ftruncate(mmap_fd, limit) != 0) {
perror("ftruncate failed");
abort();
}
missing the error check after open.
Try adding a:
if (mmap_fd == -1) {
perror("failed to open file for mmap");
abort();
}
between the open and if (ftruncate) lines, which will give you the real
error. I'll get that fixed upstream.
On Fri, 6 Dec 2019, David Karlsen wrote:
> Does memcached use any of these
> capabilities:https://unofficial-kubernetes.readthedocs.io/en/latest/concepts/policy/container-capabilities/
> ?
>
>
> fre. 6. des. 2019 kl. 16:39 skrev David Karlsen <da...@davidkarlsen.com>:
> So far I am stuck on:
> k logs test-memcached-0
> ftruncate failed: Bad file descriptor
>
>
> - memcached
> - -m 768m
> - -I 1m
> - -v
> - -e /cache-state/memory_file
>
> -vvv does not reveal anything interesting.
> What could be the cause of this?
>
> lørdag 30. november 2019 18.03.23 UTC+1 skrev David Karlsen følgende:
> Reading https://github.com/memcached/memcached/wiki/WarmRestart it is a
> bit unclear to me if the mount *has* to be tmpfs backed, or it can be a normal
> fileystem like xfs.
> We are looking into running memcached through Kubernetes/containers -
> and as a tmpfs volume would be wiped on pod-recreation
>
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> David J. M. Karlsen - http://www.linkedin.com/in/davidkarlsen
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