The official website recommends the following hardware specification for Zimbra open-source edition.
-Intel/AMD 2.0 GHz 64-bit CPU
-A minimum of 8GB of RAM for a single server installation
-10 GB disk space for software and logs, and additional disk space for mail storage and temporary files
-At least 4GB of RAM for each server if you split the server in 2, but all depend of the kind of services you decide to install on each machine.
General Requirements
-Firewall Configuration should be set to “No firewall”.
-RAID-5 is not recommended for installations with more than 100 accounts.
-SSH client software to transfer and install the Zimbra Collaboration software.
-Valid DNS configured with an A record and MX record.
-Servers should be configured to run Network Time Protocol (NTP) on a scheduled basis.
On both centos VM update the OS, install all packages needed for zimbra install, and disable firewall and sendmail services
yum update -y yum install net-tools usbutils firewalld wget nc perl perl-core ntpl nmap sudo libidn gmp libaio libstdc++ unzip sysstat sqlite -y yum erase postfix systemctl stop sendmail systemctl disable sendmail systemctl stop firewalld systemctl disable firewalld
Add following entries to your both host files to change selinux config
vi /etc/selinux/config
change line SELINUX=permissive
Add following entries to your both host files
vi /etc/hosts 10.0.17.101 zimbra1.demo.local zimbra1 10.0.17.102 zimbra2.demo.local zimbra2
and remove all ipv6 relations comment or delete all ::1
Make static address in your NIC on all servers
vi /etc/sysconfig/network-scripts/ifcfg-………
Remove ipv6 configuration in file
vi /etc/sysctl.conf
Append the text below at the end of the file
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1
Apply and if print 1 everything related to ipv6 is disabled and you can reboot
sysctl -p reboot
Now create and mount the partition will store the data of your mail system, if you are not familiar to this please search on internet to understand better what you are doing.
The server that need the second hard drive to store email data is the server where you are going to install zimbra store service, in our case the server 1.
We suppone that /dev/sda is your main linux HDD and /dev/sdb/ is the second disk that will be mounted on /opt/zimbra.
The above command will help you to understand the status of your system
fdisk -l lsblk lvs pvdisplay /dev/sd... vgdisplay vg...
Let’s create the partition on /dev/sdb/ and mount on /opt/zimbra
mkdir /opt/zimbra pvcreate /dev/sdb pvdisplay /dev/sdb vgcreate vg1 /dev/sdb lvcreate -l 100%FREE -n zmstore vg0 mkfs.ext4 /dev/vg0/zmstore blkid /dev/vg1/* >> /etc/fstab
once the UUID is sent in append to /etc/fstab open the file and delete the title sent as in the example
vi /etc/fstab example: UUID=00000xxxx-xxxxxx-xxxxxxxx /opt/zimbra ext4 defaults 0 0
After save the file mount and check if is mounted correctly
mount -a mount | grep opt lsblk
If everything is ok we are ready to install zimbra, go the folder you decide to use for download zimbra packages
cd /home/ wget https://files.zimbra.com/downloads/8.6.0_GA/zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz tar xzvf zcs-8.6.0_GA_1153.RHEL7_64.20141215151110.tgz cd zcs-8.6.0_GA_1153.RHEL7_64.20141215151110 ./install.sh
in this case we are going to split the zimbra mail server in 2 different server with different services running on the servers, you can decide to use more servers depends of your needs, Let’s install
Services to install in server 1
cd zcs-… ./install.sh
Do you agree with the terms of the software license agreement? [N] Y
Select the packages to install
Install zimbra-ldap [Y]
y
Install zimbra-logger [Y]
y
Install zimbra-mta [Y] N
Install zimbra-dnscache [N] N
Install zimbra-snmp [Y] N
Install zimbra-store [Y]
y
Install zimbra-apache [Y]
y
Install zimbra-spell [Y]
y
Install zimbra-memcached [Y]
y
Install zimbra-proxy [Y] N
after install edit the field marked with **** before to save change timezone change default ldap admin password and make sure all password are set save config and apply. Before to start with second server apply config here and test with:
zmcontrol status
Services to install in second server
cd zcs-… ./install.sh
Do you agree with the terms of the software license agreement? [N] Y
Select the packages to install
Install zimbra-ldap [Y]
n
Install zimbra-logger [Y]
n
Install zimbra-mta [Y]
y
Install zimbra-dnscache [N]
y
Install zimbra-snmp [Y] N
Install zimbra-store [Y]
n
Install zimbra-apache [Y]
n
Install zimbra-spell [Y]
n
Install zimbra-memcached [Y]
y
Install zimbra-proxy [Y] y
before to save change timezone, check ldap_master_host change default ldap admin password as the other server and check all password on the other server with zmlocalconfig -s (password to know).
Set Up the SSH Keys – both servers
We need to manually populate ssh keys on each server
su - zimbra zmupdateauthkeys
Enabling Server Statistics – both servers
In order for the server statistics to display on the administration console, the syslog configuration files must be modified. On each server, as root, type
/opt/zimbra/libexec/zmsyslogsetup
Verify configuration
zmcontrol status
Setting up proxy zimbra1.demo.local
zimbra1.demo.local
su zimbra /opt/zimbra/libexec/zmproxyconfig -e -m -H mailboxsrv.demo... /opt/zimbra/libexec/zmproxyconfig -e -w -H mailboxsrv.demo...
mtasrv.demo…
su zimbra /opt/zimbra/libexec/zmproxyconfig -e -m -H mtasrv.demo... /opt/zimbra/libexec/zmproxyconfig -e -w -H mtasrv.demo... zmcontrol restart
Once installation is complete, do the common following steps on each server to function properly.
1: Restart and Enable crond service
systemctl restart crond systemctl enable crond
2: Open rsyslog.conf file and uncomment following two lines and restart service
vim /etc/rsyslog.conf $ModLoad imudp $UDPServerRun 514 # Provides TCP syslog reception $ModLoad imtcp $InputTCPServerRun 514 service rsyslog restart
3: Restart and Enable rsyslog service
systemctl restart rsyslog systemctl enable rsyslog
4: Now run the below command to update rsyslog
/opt/zimbra/libexec/zmsyslogsetup updateSyslog: Updating /etc/rsyslog.conf...done.
If the installation are successful you can access via web:
https://zimbra1.demo.local:443
for a webmail
https://zimbra2.demo.local:7071/zimbraAdmin
for admin managment site
(use your own link).
—>>> ENJOY!!! <<<—
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