Pacemaker : Set Cluster Resource (httpd)2021/06/11 |
Set Apache httpd Cluster Resource and Configure Active/Passive Web Server.
This example is based on the environment like follows.
1) Basic Cluster setting is done 2) Fence Device is set 3) LVM shared storage is set +--------------------+ | [ ISCSI Target ] | | dlp.srv.world | +----------+---------+ 10.0.0.30| | +----------------------+ | +----------------------+ | [ Cluster Node#1 ] |10.0.0.51 | 10.0.0.52| [ Cluster Node#2 ] | | node01.srv.world +----------+----------+ node02.srv.world | | Apache httpd | | | Apache httpd | +----------------------+ | +----------------------+ vip:10.0.0.60 | +----------+---------+ | [ Clients ] | | | +--------------------+ |
[1] | On all Cluster Nodes, Install Apache httpd. |
[root@node01 ~]#
dnf -y install httpd
[root@node01 ~]#
vi /etc/httpd/conf.d/server-status.conf # create new (enable server-status) <Location /server-status> SetHandler server-status Require local </Location>
[root@node01 ~]#
vi /etc/logrotate.d/httpd # line 7 : change like follows /var/log/httpd/*log { missingok notifempty sharedscripts delaycompress postrotate #/bin/systemctl reload httpd.service > /dev/null 2>/dev/null || true /usr/sbin/httpd -f /etc/httpd/conf/httpd.conf -c "PidFile /var/run/httpd/httpd.pid" -k graceful > /dev/null 2>/dev/null || true endscript } # if Firewalld is running, allow service [root@node01 ~]# firewall-cmd --add-service={http,https} --permanent success [root@node01 ~]# firewall-cmd --reload success |
[2] | On a Node LVM shared storage is active, Copy httpd files and create a Test page. |
[root@node02 ~]# mount /dev/vg_ha/lv_ha /mnt [root@node02 ~]# cp -pR /var/www/* /mnt/ [root@node02 ~]# echo "Test Page" > /mnt/html/index.html [root@node02 ~]# umount /mnt |
[3] | On a Node in Cluster, Add httpd resource. [/dev/vg_ha/lv_ha] on the example below is LVM shared storage. |
# create filesystem resource [root@node01 ~]# pcs resource create httpd_fs ocf:heartbeat:Filesystem device=/dev/vg_ha/lv_ha directory=/var/www fstype=ext4 --group ha_group
# create virtual IP address resource [root@node01 ~]# pcs resource create httpd_vip ocf:heartbeat:IPaddr2 ip=10.0.0.60 cidr_netmask=24 --group ha_group
# create Apache resource [root@node01 ~]# pcs resource create website ocf:heartbeat:apache configfile=/etc/httpd/conf/httpd.conf statusurl=http://127.0.0.1/server-status --group ha_group
pcs status Cluster name: ha_cluster Cluster Summary: * Stack: corosync * Current DC: node01.srv.world (version 2.0.5-9.el8_4.1-ba59be7122) - partition with quorum * Last updated: Fri Jun 11 01:52:42 2021 * Last change: Fri Jun 11 01:52:36 2021 by root via cibadmin on node01.srv.world * 2 nodes configured * 5 resource instances configured Node List: * Online: [ node01.srv.world node02.srv.world ] Full List of Resources: * scsi-shooter (stonith:fence_scsi): Started node01.srv.world * Resource Group: ha_group: * lvm_ha (ocf::heartbeat:LVM-activate): Started node02.srv.world * httpd_fs (ocf::heartbeat:Filesystem): Started node02.srv.world * httpd_vip (ocf::heartbeat:IPaddr2): Started node02.srv.world * website (ocf::heartbeat:apache): Started node02.srv.world Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled # if SELinux is enabled, run restorecon on active Node [root@node02 ~]# restorecon -R /var/www
# access to vip to verify working [root@node02 ~]# curl http://10.0.0.60/index.html Test Page |
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