On 5/11/2020 7:38 AM, Kern Sibbald wrote:
Hello Sven,
I share your concerns, but here are a few mitigating factors:
1. I am not aware of any other C/C++ S3 library that will do the same
job and is well maintained. I have to admit I have not looked
recently, so any suggestions would be welcome.
I'm not aware of other C libraries either, but why not use AWS CLI
high-level commands in much the same way that tape autochanger script
commands are implemented? AWS CLI is actively maintained by Amazon and
so shouldn't have the maintenance issues. These are simple mv, cp, ls,
etc. commands somewhat equivalent to their Unix command namesakes. They
shouldn't change even when/if Amazon changes the underlying S3 protocols.
2. Bacula Systems actively uses libs3 with its customers, and any
corrections that they make will also be in the Bacula community libs3
git repo (under the same GNU Lesser V3 license)
3. Amazon (or other s3 supplier's) tools can be used to restore Bacula
S3 Volumes to disk, and once that is done, Bacula can read those
volumes regardless of what S3 library it is linked with. This is
because when the Volumes are on disk, Bacula reads them as standard OS
files. libs3 is only used to move files from a local disk to and from
the S3 cloud.
Best regards,
Kern
On 5/10/20 3:24 PM, Sven Hartge wrote:
On 10.05.20 15:01, Kern Sibbald wrote:
I agree with Sven, libs3 is a big disaster. It works well but the
author abandoned it, and many things have changed since then. For the
moment, we have a version that works with AWS (don't expect it to work
with a number of other S3 implementations, which are not compatible with
AWS).
Adding to that: Other than the horrendous possible security flaws
present in libs3 (try to compile with a recent GCC and see for yourself)
the nature of anything cloud-bases is inherently volatile.
The AWS-API may change at any given moment (and it has in the past),
making libs3 incompatible without updates.
And without an upstream author implementing those changes, your backups
are more or less gone.
My very pessimistic view on the situation is: Don't use any backup
solution using libs3 if you value your data.
But: YMMV.
Grüße,
Sven.
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