Marco, thank you for your bug report. I am able to reproduce the issue and it does appear the ISA plugin is not included in the Ceph packages from Hirsute and onward:
# dpkg-query -W ceph-base ceph-base 15.2.13-0ubuntu0.20.04.1 # dpkg -S libec ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_lrc.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_isa.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_clay.so # dpkg-query -W ceph-base ceph-base 16.2.4-0ubuntu0.21.04.1 # dpkg -S libec ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_lrc.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_clay.so # dpkg-query -W ceph-base ceph-base 16.2.5-0ubuntu2 # dpkg -S libec ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_lrc.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_generic.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse3.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_shec_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_jerasure_sse4.so ceph-base: /usr/lib/x86_64-linux-gnu/ceph/erasure-code/libec_clay.so ** Also affects: ceph (Ubuntu) Importance: Undecided Status: New ** Changed in: ceph (Ubuntu) Status: New => Triaged ** Changed in: ceph (Ubuntu) Importance: Undecided => High ** Changed in: charm-ceph-mon Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940697 Title: missing erasure code plugin library libec_isa.so To manage notifications about this bug go to: https://bugs.launchpad.net/charm-ceph-mon/+bug/1940697/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs