Editing GSTN - ZIMBRA MAILBOX CLUSTER

[[category:GSTN]]

= Zimbra Mailbox Clustering =

= Pacemaker: Install =

<div style="color:#000000;">Install and Configure Linux High-Availability Cluster tool "Pacemaker".</div>

<div style="text-align:center;">mailbox.gstn.org.in</div>

<div style="text-align:center;color:#000000;">'''172.18.101.20'''</div>

<span style="color:#000000;">|</span>

<div style="color:#000000;">+----------------------+ | +----------------------+</div>

<span style="color:#000000;">| [ Node01 ] |</span><span style="color:#000000;">172.18.101.18 </span><span style="color:#000000;">|</span><span style="color:#000000;">172.18.101.19 </span><span style="color:#000000;">| [ Node02 ] |</span>

<span style="color:#000000;">| </span><span style="color:#000000;">'''gd9109.gstn.org.in'''</span><span style="color:#000000;"> </span><span style="color:#000000;">+----------+----------+ </span><span style="color:#000000;">'''gd9109.gstn.org.in'''</span><span style="color:#000000;"> |</span>

<span style="color:#000000;">| | | |</span>

<div style="color:#000000;">+----------------------+ +----------------------+</div>

== Install Pacemaker like follows on all Nodes. ==

[root@gd9109 ~]# yum -y install pacemaker pcs

[root@gd9109 ~]# systemctl start pcsd 

[root@gd9109 ~]# systemctl enable pcsd

== Set password for cluster admin user ==

[root@gd9109 ~]# passwd hacluster 

Changing password for user hacluster.

New password:

Retype new password:

passwd: all authentication tokens updated successfully.


== Configure like follows on a Node. ==

=== Establish authorization ===

[root@gd9109 ~]# pcs cluster auth gd9109.gstn.org.in gd9110.gstn.org.in 

Username: hacluster 

Password:

gd9109.gstn.org.in: Authorized

gd9110.gstn.org.in: Authorized

=== Configure cluster ===

[root@gd9109 ~]# pcs cluster setup --name Mailbox-Cluster gd9109.gstn.org.in gd9110.gstn.org.in

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...

gd9109.gstn.org.in: Succeeded

gd9110.gstn.org.in: Succeeded

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=== Start services for cluster ===

[root@gd9109 ~]# pcs cluster start --all 

gd9109.gstn.org.in: Starting Cluster...

gd9110.gstn.org.in: Starting Cluster...

=== Enable cluster ===

[root@gd9109 ~]# pcs cluster enable --all 

gd9109.gstn.org.in: Cluster Enabled

gd9110.gstn.org.in: Cluster Enabled

=== Show status ===

[root@gd9109 ~]# pcs status corosync

Membership information

<nowiki>----------------------</nowiki>

Nodeid Votes Name

1 1 gd9109 (local)

2 1 gd9110

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== Show settings ==

[root@gd9109 ~]# 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


= Pacemaker: Add Resource =

== Set virtual IP address ==

=== IPv4 Resource: ===

[root@gd9109 ~]# pcs resource create ClusterIP ocf:heartbeat:IPaddr2 ip=172.18.101.20 cidr_netmask=24 op monitor interval=30s

=== IPv6 Resource: ===

[root@gd9109 ~]# pcs resource create ClusterIPv6 ocf:heartbeat:IPaddr2 ip=2404:a800:1000:d:7800::14 cidr_netmask=69 op monitor interval=30s

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== Install required packages on all Nodes. ==

[root@gd9109 ~]# yum -y install fence-agents-all lvm2-cluster gfs2-utils

== Add required resources. It's OK to set on a node. ==

[root@gd9109 ~]# pcs resource create dlm ocf:pacemaker:controld op monitor interval=30s on-fail=fence clone interleave=true ordered=true 

[root@gd9109 ~]# pcs resource create clvmd ocf:heartbeat:clvm op monitor interval=30s on-fail=fence clone interleave=true ordered=true 

[root@gd9109 ~]# pcs constraint order start dlm-clone then clvmd-clone 

[root@gd9109 ~]# pcs constraint colocation add clvmd-clone with dlm-clone


= Pacemaker: CLVM + GFS2 =

== 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. ==

[root@gd9109 ~]# pvcreate /dev/vdb1

[root@gd9109 ~]# vgcreate -cy vg_cluster /dev/vdb1

[root@gd9109 ~]# lvcreate -l100%FREE -n lv_cluster vg_cluster

[root@gd9109 ~]# mkfs.gfs2 -p lock_dlm -t ha_cluster:gfs2 -j 2 /dev/vg_cluster/lv_cluster


== 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)


= Create Fence through rhev manager:  =

[root@gd9109 ~]# pcs stonith create rhevfence fence_rhevm stonith-timeout=120 pcmk_host_map="GD9109.gstn.org.in:GD9109 GD9110.gstn.org.in:GD9110" ipaddr=172.18.102.22 ssl=1 login=cluster_admin passwd=XXXXXXX

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