Supponiamo che il nodo da reinstallare sia ceph-mon-03


Spengo i servizi mon e mgr:


[root@ceph-mon-03 ~]# systemctl stop ceph-mgr.target
[root@ceph-mon-03 ~]# systemctl stop ceph-mon.target
[root@ceph-mon-03 ~]# systemctl stop ceph-mon@ceph-mon-03


Elimino il mon:


[root@ceph-mon-03 ~]# ceph mon remove ceph-mon-03


In foreman metto il server nell'HostGroup hosts_all e reinstallo la macchina con AlmaLinux9


Configurazione rete dati:


nmcli con mod eno3 ipv4.method manual ipv4.addr "192.168.61.208/24"
nmcli con mod eno3 802-3-ethernet.mtu 9000
nmcli con up eno3
nmcli con mod eno3 connection.autoconnect yes


Cancello l'utente ceph-mon-03:


[root@ceph-mon-01 ~]# ceph auth del mgr.ceph-mon-03
[root@ceph-mon-01 ~]#


Installo ceph:

 rpm -e epel-release # e' gia' installato ma disabilitato
 yum install epel-release
 rpm -Uvh https://download.ceph.com/rpm-quincy/el9/noarch/ceph-release-1-1.el9.noarch.rpm
 yum clean all
 yum update
 yum install ceph



In foreman metto il server nell'HosGroup ceph_prod


puppet agent -t


Copio da un altro nodo /etc/ceph/ceph.client.admin.keyring


Configurazione MON


mkdir /var/lib/ceph/mon/ceph-ceph-mon-03
chown ceph.ceph /var/lib/ceph/mon/ceph-ceph-mon-03
mkdir /tmp/ceph-ceph-mon-03
ceph auth get mon. -o /tmp/ceph-ceph-mon-03/monkeyring
ceph mon getmap -o /tmp/ceph-ceph-mon-03/monmap
ceph-mon -i ceph-mon-03 --mkfs --monmap /tmp/ceph-ceph-mon-03/monmap --keyring /tmp/ceph-ceph-mon-03/monkeyring 
touch /var/lib/ceph/mon/ceph-ceph-mon-03/systemd
chown ceph.ceph /var/lib/ceph/mon/ceph-ceph-mon-03/*
chown ceph.ceph /var/lib/ceph/mon/ceph-ceph-mon-03/store.db/*
systemctl start ceph-mon@ceph-mon-03
systemctl enable ceph-mon@ceph-mon-03



Configurazione MGR


ceph auth get-or-create mgr.ceph-mon-03 mon 'allow profile mgr' osd 'allow *' mds 'allow *'
mkdir /var/lib/ceph/mgr/ceph-ceph-mon-03
chown ceph.ceph /var/lib/ceph/mgr/ceph-ceph-mon-03


Creo il file /var/lib/ceph/mgr/ceph-ceph-mon-03/keyring 


[root@ceph-mon-03 ~]# cat /var/lib/ceph/mgr/ceph-ceph-mon-03/keyring 


[mgr.ceph-mon-03]
    key = AQBpNp5mP+LFABAA59MxEhvILQ4Q8CyqOFsVdA==



La chiave deve coincidere con:



[root@ceph-mon-03 ~]#  ceph auth get mgr.ceph-mon-03
[mgr.ceph-mon-03]
    key = AQBpNp5mP+LFABAA59MxEhvILQ4Q8CyqOFsVdA==
    caps mds = "allow *"
    caps mon = "allow profile mgr"
    caps osd = "allow *"


[root@ceph-mon-03 ~]# chown ceph.ceph  /var/lib/ceph/mgr/ceph-ceph-mon-03/keyring
[root@ceph-mon-03 ~]# chmod og-r /var/lib/ceph/mgr/ceph-ceph-mon-03/keyring
[root@ceph-mon-03 ~]# systemctl restart ceph-mgr@ceph-mon-03.service
[root@ceph-mon-03 ~]# systemctl enable ceph-mgr@ceph-mon-03.service
Created symlink /etc/systemd/system/ceph-mgr.target.wants/ceph-mgr@ceph-mon-03.service → /usr/lib/systemd/system/ceph-mgr@.service.
[root@ceph-mon-03 ~]# 


Nagios

Copio da un altro nodo:

/usr/lib64/nagios/plugins/check_ceph_mon

/usr/lib64/nagios/plugins/check_ceph_health

/home/nagios/client.nagios.keyring

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