[ceph-users] Centos 7 Kernel clients on ceph Quincy -- experiences??

[Ackermann, Christoph]

Hello all,

i would like to upgrade our well running Rocky 8.6 based bare metal cluster
from Octopus to Quincy next few days. But there are some Centos7 Kernel
based clients mapping RBDs or mounting CephFS in our environment.

Is there someone here who can confirm Centos 7 clients
(3.10.0-1160.76.1.el7.x86_64) working with Quincy?

Best regards,

Christoph



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[ceph-users] CentOS 7 and CentOS 8 Stream dependencies for diskprediction module

[Michal Strnad]

Hi,

Did anyone get the diskprediction-local plugin working on CentOS 7.9 or 
CentOS 8 Stream? We have the same problem under both version of CentOS.


When we enable the plugin with 15.2.14 ceph version we get following error.

Module 'diskprediction_local' has failed: No module named
sklearn.svm.classes

If the package ceph-mgr-diskprediction-local is installed it brings in 
several dependencies but apparently these are not enough.


We tried using pip/pip3 to get another library but diskprediction_local
still doesn't work. Are we missing something?

Thank you

Cheers,
Michal

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[ceph-users] CentOS Linux 8 EOL

[Dan van der Ster]

Dear friends,

We wanted to clarify the plans / expectations for when CentOS Linux 8
reaches EOL at the end of this year.
The default plan for our prod clusters is to upgrade servers in place
from Linux 8.4 to Stream 8. (We already started this a couple months
ago, ran into a couple minor fixable issues, and will resume these
upgrades soon).

Currently the el8 octopus/pacific builds on download.ceph.com are
built on CentOS Linux 8 (AFAICT) -- which OS will those be built on
when Linux 8 is no more?

Best Regards,

Dan
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[ceph-users] CentOS 7 dependencies for diskprediction module

[Michal Strnad]

Hi,

Did anyone get the diskprediction-local plugin working on CentOS 7.9?
When we enable the plugin with v14.2.19 we get following error.

Module 'diskprediction_local' has failed: No module named
sklearn.svm.classes

If the package is installed it brings in several dependencies but
apparently these are not enough.

Installing:
 ceph-mgr-diskprediction-local   noarch
  2:14.2.19-0.el7
Ceph-noarch   1.1 M
Installing for dependencies:
 atlas   x86_64
  3.10.1-12.el7
base  4.5 M
 blasx86_64
  3.4.2-8.el7
base  399 k
 lapack  x86_64
  3.4.2-8.el7
base  5.4 M
 libgfortran x86_64
  4.8.5-44.el7
base  301 k
 libquadmath x86_64
  4.8.5-44.el7
base  190 k
 numpy   x86_64
  1:1.7.1-13.el7
base  2.8 M
 numpy-f2py  x86_64
  1:1.7.1-13.el7
base  206 k
 python-develx86_64
  2.7.5-90.el7
updates   399 k
 python-nose noarch
  1.3.7-1.el7
base  276 k
 python2-rpm-macros  noarch
  3-34.el7
base  8.1 k
 scipy   x86_64
  0.12.1-6.el7
base  9.3 M
 suitesparse x86_64
  4.0.2-10.el7
base  928 k
 tbb x86_64
  4.1-9.20130314.el7
base  124 k

We tried using pip/pip3 to get another library but diskprediction_local
still doesn't work. Are we missing something?

Thank you

Cheers,
Michal



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[ceph-users] Centos 8 2021 with ceph, how to move forward?

[Szabo, Istvan (Agoda)]

Hi,

Just curious how you guys move forward with this Centos 8 change.

We just finished installing our full multisite cluster and looks like we need 
to change the operating system.

So curious if you are using centos 8 with ceph, where you are going to move 
forward.

Thank you


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[ceph-users] CentOS

[DHilsbos]

All;

As you may or may not know; this morning RedHat announced the end of CentOS as 
a rebuild distribution[1].  "CentOS" will be retired in favor of the recently 
announced "CentOS Stream."

Can Ceph be installed on CentOS Stream?

Since CentOS Stream is currently at 8, the question really is: Can Ceph Octopus 
be installed on CentOS Stream 8?  How about Nautilus?

Thank you,

Dominic L. Hilsbos, MBA 
Director - Information Technology 
Perform Air International Inc.
dhils...@performair.com 
www.PerformAir.com

[1: https://blog.centos.org/2020/12/future-is-centos-stream/]
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[ceph-users] CentOS 8, Ceph Octopus, ssh private key

[Mika Saari]

Hi,

  Installing Ceph Octopus using cephadm. I managed to install ceph-common
with cephadm and when trying to add new hosts with "ceph orch host add
ceph2" I get error

"Error EINVAL: Failed to connect to ceph2 (ceph2). Check that the host is
reachable and accepts connection using the cephadm SSH key".

  I verified that I am able to ssh login to the ceph2 server with ceph
private_key like it was described in the error message. But since adding
new hosts to the ceph wasn't working, I tried generating the new private
key and updating the public keys to the remote servers with:
  # ceph cephadm clear-key
  # ceph cephadm generate-key
  # ceph cephadm get-pub-key > ceph.pub
  # ceph config-key get mgr/cephadm/ssh_identity_key > ceph.priv
  # ssh-copy-id -f -i /etc/ceph/ceph.pub root@ceph1
  # ssh-copy-id -f -i /etc/ceph/ceph.pub root@ceph2
  # ssh-copy-id -f -i /etc/ceph/ceph.pub root@ceph3
  And then testing that the private key really is working:
  # chmod 600 ceph.priv
  # ssh -i ceph.priv root@ceph2
  At this point ssh works with passwordless login. But still the ceph orch
host add ceph2 doesn't work (giving exactly the same error)

  I also tried restarting the manager with "ceph mgr fail" which was
informed somewhere -> no effect. Also tried rebooting the machines -> no
effect.

  Any tips I could still try ?

  Thank you very much!
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