Bug 1869837

Summary: Unable to remove mds using shrink-mds.yml
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Shrivaibavi Raghaventhiran <sraghave>
Component: Ceph-AnsibleAssignee: Guillaume Abrioux <gabrioux>
Status: CLOSED ERRATA QA Contact: Ameena Suhani S H <amsyedha>
Severity: high Docs Contact:
Priority: unspecified    
Version: 4.0CC: aschoen, ceph-eng-bugs, ceph-qe-bugs, dsavinea, gmeno, nthomas, tserlin, vereddy, ykaul
Target Milestone: z2   
Target Release: 4.1   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: ceph-ansible-4.0.29-1.el8cp, ceph-ansible-4.0.29-1.el7cp Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of: Environment:
Last Closed: 2020-09-30 17:26:56 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Shrivaibavi Raghaventhiran 2020-08-18 18:37:07 UTC 
Description of problem:
-------------------------
Unable to remove MDS by using shrink-mds.yml using fqdn,

Tried 3 different commands but none seems to work
# ansible-playbook -e ireallymeanit=yes infrastructure-playbooks/shrink-mds.yml -i hosts -vv -e mds_to_kill=dell-r640-013

# ansible-playbook -e ireallymeanit=yes infrastructure-playbooks/shrink-mds.yml -i hosts -vv -e mds_to_kill=dell-r640-013.dsal.lab.eng.rdu2.redhat.com

ansible-playbook  -e ireallymeanit=yes infrastructure-playbooks/shrink-mds.yml -i hosts -vv -e mds_to_kill=ceph-mds-dell-r640-013

Errors pasted http://pastebin.test.redhat.com/894482


Version-Release number of selected component (if applicable):
[root@dell-r640-012 /]# ceph version
ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)
[root@dell-r640-012 /]# ceph versions
{
    "mon": {
        "ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)": 2
    },
    "mgr": {
        "ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)": 1
    },
    "osd": {
        "ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)": 2
    },
    "mds": {
        "ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)": 1
    },
    "overall": {
        "ceph version 14.2.8-89.el8cp (9ab115d618c72e7d9227441ec25ceb1487c76fb8) nautilus (stable)": 6
    }
}

How reproducible:
Many times


Steps to Reproduce:
1. Try to shrink-mds using shrink-mds.yml playbook
2. the hosts file contained fqdn
3. Check if the mds is removed

Actual results:
The MDS did not get removed


Expected results:
The mds should have been removed from the cluster

Workaround:
------------
Instead of not having FQDNs as the hostname, try having something like this in hosts file 

#dell-r640-013.dsal.lab.eng.rdu2.redhat.com monitor_interface=em1
dell-r640-013 monitor_interface=em1

and run

ansible-playbook  -e ireallymeanit=yes infrastructure-playbooks/shrink-mds.yml -i hosts -vv -e mds_to_kill=dell-r640-013

The removal of MDS should be a success

Additional info:
Comment 10 errata-xmlrpc 2020-09-30 17:26:56 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat Ceph Storage 4.1 Bug Fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4144