Pacemaker

Configuración

Pacemaker es un gestor de clúster y recursos

Para instalarlo en CentOS

yum install corosync pacemaker pcs python-pycurl fence-agents-apc fence-agents-apc-snmp

Habilitar e iniciar servicios

systemctl enable pcsd
systemctl enable corosync
systemctl enable pacemaker
systemctl start pcsd

Necesitamos una nueva contraseña para unirse al clúster. El usuario por defecto es hacluster

passwd hacluster

Autorizar servidores, configurar el nombre del clúster e iniciar todo

pcs cluster auth cluster1 cluster2
pcs cluster setup --name backup_cluster cluster1 cluster2
pcs cluster start --all

Podemos deshabilitar algunas configuraciones hasta que terminemos la configuración

pcs property set stonith-enabled=false
pcs property set maintenance-mode=true

El primer recurso que debería existir es un dispositivo de cercado

pcs cluster cib stonith_cfg
pcs -f stonith_cfg stonith create stonith1 fence_apc_snmp ipaddr=10.1.79.11 pcmk_host_list="cluster1" pcmk_host_map="cluster1:6" pcmk_host_check=static-list power_wait=3 inet4_only=1 retry_on=10
pcs -f stonith_cfg stonith create stonith2 fence_apc_snmp ipaddr=10.1.79.12 pcmk_host_list="cluster2" pcmk_host_map="cluster2:6" pcmk_host_check=static-list power_wait=5 inet4_only=1 retry_on=10
pcs cluster cib-push stonith_cfg

Recurso del sistema de archivos

pcs resource create backup_ext4 ocf:heartbeat:Filesystem device="/dev/drbd104" directory="/mnt/backup" fstype="ext4" "options=defaults,noatime" op monitor interval=10s
pcs resource create isard_ext4 ocf:heartbeat:Filesystem device="/dev/drbd102" directory="/mnt/isard" fstype="ext4" "options=defaults,noatime" op monitor interval=10s

IPs flotantes

pcs resource create backup_ip ocf:heartbeat:IPaddr2 ip=10.1.90.10 cidr_netmask=32 nic=escola:0 op monitor interval=30
pcs resource create isard_ip ocf:heartbeat:IPaddr2 ip=10.1.2.200 cidr_netmask=32 nic=isard:0 op monitor interval=30

Servidor NFS v4

pcs cluster cib nfs_cfg
pcs -f nfs_cfg resource create nfs_daemon systemd:nfs-server op monitor interval=30s --group=nfs_server
pcs -f nfs_cfg resource create nfs_root ocf:heartbeat:exportfs clientspec=10.1.0.0/255.255.0.0 options=rw,crossmnt,async,wdelay,no_root_squash,no_subtree_check,sec=sys,rw,secure,no_root_squash,no_all_squash directory=/mnt fsid=0 --group=nfs_server
pcs cluster cib-push nfs_cfg
pcs resource clone nfs_server master-max=3 master-node-max=1 clone-max=3 clone-node-max=1 on-fail=restart notify=true resource-stickiness=0

Exportaciones NFS v4

pcs cluster cib exports_cfg
pcs -f exports_cfg resource create backup_nfs ocf:heartbeat:exportfs clientspec=10.1.0.0/255.255.0.0 wait_for_leasetime_on_stop=true options=rw,mountpoint,async,wdelay,no_root_squash,no_subtree_check,sec=sys,rw,secure,no_root_squash,no_all_squash directory=/mnt/backup fsid=5 op monitor interval=30s
pcs -f exports_cfg resource create isard_nfs ocf:heartbeat:exportfs clientspec=10.1.0.0/255.255.0.0 wait_for_leasetime_on_stop=true options=rw,mountpoint,async,wdelay,no_root_squash,no_subtree_check,sec=sys,rw,secure,no_root_squash,no_all_squash directory=/mnt/isard fsid=6 op monitor interval=30s
pcs cluster cib-push exports_cfg

Grupos de recursos

pcs resource group add backup backup_ext4 backup_nfs backup_ip
pcs resource group add isard isard_ext4 isard_nfs isard_ip

Activar clúster

pcs property set maintenance-mode=false
pcs property set stonith-enabled=true