Pacemaker : Set Cluster Resource (Apache2)2024/07/23 |
Set Apache httpd Cluster Resource and Configure Active/Passive Web Server.
This example is based on the environment like follows. +--------------------+ | [ 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 Apache2. |
root@node01:~#
apt -y install apache2
root@node01:~#
vi /etc/apache2/conf-available/server-status.conf # create new (enable server-status) <Location /server-status> SetHandler server-status Require local </Location> a2enconf server-status
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[2] | On a Node that LVM shared storage is active in Cluster, Copy httpd files and create a Test page. [/dev/vg_ha/lv_ha] on the example below is LVM shared storage. |
root@node01:~# mount /dev/vg_ha/lv_ha /mnt root@node01:~# cp -pR /var/www/* /mnt/ root@node01:~# echo "High Availability Test Page" > /mnt/html/index.html root@node01:~# umount /mnt |
[3] | On a Node that LVM shared storage is active in Cluster, Add httpd resource. [/dev/vg_ha/lv_ha] on the example below is LVM shared storage. |
root@node01:~# pcs status Cluster name: ha_cluster Cluster Summary: * Stack: corosync (Pacemaker is running) * Current DC: node01.srv.world (version 2.1.6-6fdc9deea29) - partition with quorum * Last updated: Tue Jul 23 04:19:20 2024 on node01.srv.world * Last change: Tue Jul 23 04:15:34 2024 by root via cibadmin on node01.srv.world * 2 nodes configured * 2 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 node01.srv.world Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled # 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 --future
# 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 --future
# create Apache resource root@node01:~# pcs resource create website ocf:heartbeat:apache configfile=/etc/apache2/apache2.conf statusurl=http://127.0.0.1/server-status group ha_group --future
pcs status Cluster name: ha_cluster Cluster Summary: * Stack: corosync (Pacemaker is running) * Current DC: node01.srv.world (version 2.1.6-6fdc9deea29) - partition with quorum * Last updated: Tue Jul 23 04:21:57 2024 on node01.srv.world * Last change: Tue Jul 23 04:21:51 2024 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 node01.srv.world * httpd_fs (ocf:heartbeat:Filesystem): Started node01.srv.world * httpd_vip (ocf:heartbeat:IPaddr2): Started node01.srv.world * website (ocf:heartbeat:apache): Started node01.srv.world Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled # access to vip to verify working root@node01:~# curl http://10.0.0.60/index.html High Availability Test Page |
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