Hi all,
I'm preparing for EX436 exam on RH labs and testing many scenarios. One of these scenarios is prepare cluster with assigned two IP addresses to each node and then use iscsi target with dlm, multipath and LVM's.
Everything goes somoothly till... I starting with LVM configuration. I getting error "Global lock failed: check that global lockspace is started".
Below steps which I using for reproduce that error:
1. pcs cluster setup prod1 \
node1.mydomain.com addr=172.25.250.10 addr=172.25.250.50\
node2.mydomain.com addr=172.25.250.11 addr=172.25.250.51\
node3.mydomain.com addr=172.25.250.12 addr=172.25.250.52\
2. pcs stonith create fence_node1 fence_ipmilan pcmk_host_list=node1.mydomain.com ip=192.168.0.101 username=myadmin password=secret_password lanplus=1 power_timeout=180
pcs stonith create fence_node2 fence_ipmilan pcmk_host_list=node2.mydomain.com ip=192.168.0.101 username=myadmin password=secret_password lanplus=1 power_timeout=180
pcs stonith create fence_node3 fence_ipmilan pcmk_host_list=node2.mydomain.com ip=192.168.0.101 username=myadmin password=secret_password lanplus=1 power_timeout=180
3. cat /etc/corosync/corosync.conf
nodelist {
node {
ring0_addr 172.25.250.10
ring1_addr 172.25.250.50
name: node1.mydomain.com
nodeid :1
}
node {
ring0_addr 172.25.250.11
ring1_addr 172.25.250.51
name: node2.mydomain.com
nodeid :2
}
node {
ring0_addr 172.25.250.12
ring1_addr 172.25.250.52
name: node3.mydomain.com
nodeid :3
}
}
4. dnf install -y dlm iscsi-initiator-utils lvm2-lockd device-mapper-multipath gfs2-utils [on all nodes]
5. Edit /etc/iscsi/initiatorname.iscsi file and set the IQN for the client initiator.
(iqn.2023-11.com.mydomain:<short_hostname>)[on all nodes]
6. systemctl enable --now iscsid [on all nodes]
7. iscsiadm -m discovery -t st -p 192.168.1.15 192.168.1.15
iscsiadm -m node -T iqn.2023-11.com.mydomain:store-prod -p 192.168.1.15 -l
iscsiadm -m discovery -t st -p 192.168.1.15 192.168.2.15
iscsiadm -m node -T iqn.2023-11.com.mydomain:store-prod -p 192.168.2.15 -l
[on all nodes]
8. mpathconf --enable
9. iscsiadm -m session -P 3
10. udevadm info /dev/sdb | grep ID_SERIAL=
11. Edit the /etc/multipath.conf
multipaths {
multipath {
wwid 3600140562aeac25dc4c4eb5842574c7a
alias diska
}
}
12. Copy /etc/multipath.conf to two nodes in cluster node2 and node3:
scp /etc/multipath.conf root@node2:/etc/
scp /etc/multipath.conf root@node3:/etc/
13. systemctl enable --now multipathd [on all nodes]
14. pcs resource create dlm ocf:pacemaker:controld --group=locking
15. pcs resource create lvmlockd ocf:heartbeat:lvmlockd --group=locking
16. pcs resource clone locking interleave=true
17. pvcreate /dev/mapper/diska
Global lock failed: check that global lockspace is started
Could I ask you for help to find me where I made mistake? Thank you.
