Editing Forth dimention - Tvs tyre Cluster


Zimbra MailBox and MTA clustring
    • Zimbra Mailbox Clustering
1 Pacemaker: Install
Install and Configure Linux High-Availability Cluster tool "Pacemaker".
                         Zimbra.tvstyres.com
                             10.25.2.78
                                  |
+----------------------+          |          +----------------------+
| [       Node01     ] |10.25.2.125  |10.25.2.126  | [       Node02     ] |
|   TVSCZIMBRAMAIL-1   +----------+----------+   TVSCZIMBRAMAIL-2   |
|                      |                     |                      |
+----------------------+                     +----------------------+
1.1 Install Pacemaker like follows on all Nodes.
[root@gd9109 ~]# yum -y install pacemaker pcs
[root@gd9109 ~]# systemctl start pcsd 
[root@gd9109 ~]# systemctl enable pcsd
1.2 Set password for cluster admin user
# passwd hacluster 
Changing password for user hacluster.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.

1.3 Configure like follows on a Node.
1.3.1 Establish authorization
# pcs cluster auth TVSCZIMBRAMAIL-1  TVSCZIMBRAMAIL-2
Username: hacluster 
Password:
TVSCZIMBRAMAIL-1 : Authorized
TVSCZIMBRAMAIL-2 : Authorized
1.3.2 Configure cluster
[root@gd9109 ~]# pcs cluster setup --name Mailbox-Cluster TVSCZIMBRAMAIL-1  TVSCZIMBRAMAIL-2
Shutting down pacemaker/corosync services...
Redirecting to /bin/systemctl stop pacemaker.service
Redirecting to /bin/systemctl stop corosync.service
Killing any remaining services...
Removing all cluster configuration files...
TVSCZIMBRAMAIL-1 : Succeeded
TVSCZIMBRAMAIL-2: Succeeded

1.3.3 Start services for cluster
# pcs cluster start --all 
TVSCZIMBRAMAIL-1 : Starting Cluster...
TVSCZIMBRAMAIL-2: Starting Cluster...
1.3.4 Enable cluster
# pcs cluster enable --all 
TVSCZIMBRAMAIL-1 : Cluster Enabled
TVSCZIMBRAMAIL-2 : Cluster Enabled
1.3.5 Show status
# pcs status corosync
Membership information
----------------------
    Nodeid      Votes Name
         1          1 TVSCZIMBRAMAIL-1 (local)
         2          1  TVSCZIMBRAMAIL-2

1.4  Show settings
# pcs property list
Cluster Properties:
 cluster-infrastructure: corosync
 cluster-name: Mailbox-Cluster
 dc-version: 1.1.13-10.el7-44eb2dd
 have-watchdog: false
 last-lrm-refresh: 1471967184
 stonith-action: reboot
 symmetric-cluster: on

2 Pacemaker: Add Resource
2.1 Set virtual IP address
2.1.1 IPv4 Resource:
[root@gd9109 ~]# pcs resource create ClusterIP ocf:heartbeat:IPaddr2 ip=10.25.2.78 cidr_netmask=24 op monitor interval=30s


2.1.2 Zimbra Service resource: 
Copy attached zimbra resource script on both the server at “/usr/lib/ocf/resource.d/heartbeat” location. 
Click on add resource and Select type as zimbra, name for the resource will be “Zimbra_Service”
And optional Arguments should be like below,
binary = zmcontrol
zimbra_dir = /opt/zimbra
zimbra_user = zimbra
zimbra_group = zimbra
After filling above information click on apply:



2.2 Install required packages on all Nodes.
[root@gd9109 ~]# yum -y install fence-agents-all lvm2-cluster gfs2-utils
 [root@gd9109 ~]# reboot
2.3 Add required resources. It's OK to set on a node.
# pcs resource create dlm ocf:pacemaker:controld op monitor interval=30s on-fail=fence clone interleave=true ordered=true 
# pcs resource create clvmd ocf:heartbeat:clvm op monitor interval=30s on-fail=fence clone interleave=true ordered=true 
# pcs constraint order start dlm-clone then clvmd-clone 
# pcs constraint colocation add clvmd-clone with dlm-clone

3 Pacemaker: CLVM + GFS2
3.1 Create volumes on shared storage and format with GFS2. It's OK to set on a node. On this example, it is set on sdb and create partitions on it and set LVM type with fdisk.
#  pvcreate /dev/sdb1
#  vgcreate -cy vg_cluster /dev/sdb1
#  lvcreate -l100%FREE -n lv_cluster vg_cluster
#  mkfs.gfs2 -p lock_dlm -t ha_cluster:gfs2 -j 2 /dev/vg_cluster/lv_cluster

3.2 Add shared storage to cluster resource. It's OK to set on a node.
[root@gd9109 ~]#  pcs resource create fs_gfs2 Filesystem device="/dev/vg_cluster/lv_cluster" directory="/opt/zimbra" fstype="gfs2" options="noatime,nodiratime" op monitor interval=10s on-fail=fence clone interleave=true
[root@gd9109 ~]#  pcs constraint order start clvmd-clone then fs_gfs2-clone
[root@gd9109 ~]#  pcs constraint colocation add fs_gfs2-clone with clvmd-clone
[root@gd9109 ~]# pcs constraint show
Location Constraints:
Ordering Constraints:
  start dlm-clone then start clvmd-clone (kind:Mandatory)
  start clvmd-clone then start fs_gfs2-clone (kind:Mandatory)
  start fs_gfs2-clone then start fs_bkp (kind:Mandatory)
  start fs_gfs2-clone then start Zimbra_Service (kind:Mandatory)
Colocation Constraints:
  clvmd-clone with dlm-clone (score:INFINITY)
  fs_gfs2-clone with clvmd-clone (score:INFINITY)

4 Create Fence through vmware manager: 
#   pcs stonith create rhevfence fence_vmware stonith-timeout=120 pcmk_host_map="TVSCZIMBRAMAIL-1:TVSCZIMBRAMAIL-1  TVSCZIMBRAMAIL-2:TVSCZIMBRAMAIL-2" ipaddr=172.18.102.22 ssl=1 login=cadmin passwd=XXXXXXX