Red Hat High Availability Clustering - Troubleshooting High-availability Clusters

pcs status
pcs resource failcount show firstwebserver
pcs resource show --full 
pcs resource debug-start firstwebserver --full
pcs resource show firstwebserver
pcs resource update firstwebserver configfile=/etc/httpd/conf/httpd.conf
pcs resource failcount show firstwebserver
pcs resource failcount reset firstwebserver

firewall-cmd --list-all

DEFAULT LOG
===========
pacemaker > /var/log/pacemaker.log
corosync > /var/log/messages

COROSYNC LOG
============

/etc/corosync/corosync.conf
> logging {
>  to_syslog: yes
>  to_file: yes
>  logfile: /var/log/cluster.log
>  debug: on
> }

pcs cluster sync

PACEMAKER LOG
=============

/etc/sysconfig/pacemaker
> PCMK_debug=yes
scp /etc/sysconfig/pacemaker clus0[1,2].local.net:/etc/sysconfig

LOGROTATE
=========

cp /etc/logrotate.d/pacemaker /etc/logrotate.d/cluster
sed -i 's/pacemaker/cluster/' /etc/logrotate.d/cluster
scp /etc/logrotate.d/cluster clus0[1,2].local.net:/etc/logrotate.d/
pcs cluster stop --all
pcs cluster start --all

tail -f /var/log/cluster.log

journalctl -l -u pacemaker.service -u corosync.service


CLUSTER NOTIFICATIONS
=====================
pcs resource create webmail MailTo email=user@domain.com subject="CLUSTER-NOTIFICATINS" --group=firstweb
vim /usr/local/bin/crm_notify.sh
pcs resource create mailme ClusterMon extra_options="-e mail@domain.com -E /usr/local/bin/crm_notify.sh --clone