How to merge two independent ZCS servers into one

Revision as of 01:13, 24 December 2016 by Teodor Vizirov (talk | contribs) (How to merge two independent ZCS servers into ONE)

How to merge two independent ZCS servers into ONE

   KB 23120        Last updated on 2016-12-24  




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Purpose

This article covers the following:

Case scenario: There are two separate zimbra server, not connected in any way. The aim is to move the data from one of the servers to the other.

The steps below can be used to move a server to another new server too, or to another ZCS server in multi server environment.

Prerequisites

Lets call the server that the data will be moved to the "SOURCE", and the server that will move its data to the "source" the "CLIENT". The "source" and the "client" must have the same hostnames prior this operation. The OS versions of the "source" and the "client" can be different. Eg. migrate from centos to ubuntu is ok. The Zimbra versions must be the same, because we will be doing ldap export and import, which doesn't work if the ldap schema is different.

During the steps below, there are couple of scripts to be run. Make sure you make them executable (chmod +x file.sh) before that. If you are using vim to paste the text, use :set paste before pasting, otherwise when you paste the text the formatting will be gone.


Resolution

Overview of the steps:


On both servers create base directories for the migration:

# mkdir /migration
# chown zimbra.zimbra /migration


On the old server (CLIENT):


1. Become zimbra

# su - zimbra

3. Backup the data from the "client".

3.1. backup the domains:

cd /migration
zmprov gad > domains.txt

(open the domains.txt and remove all domains/subdomains that already exists on the "source")

3.2 backup all admins

cd /migration
zmprov gaaa > admins.txt

3.3 backup all accounts

cd /migration
zmprov -l gaa > accounts.txt

(open the file accounts.txt and remove the accounts starting with: spam,ham,virus,galsync)

3.4. add the calendar resources to the accounts file

zmprov gacr >> accounts.txt

3.5 backup all distribution lists

cd /migration
zmprov gadl > dlist.txt

3.6 backup all members of the distribution lists

cd /migration
mkdir dl
for i in `cat /migration/dlist.txt`; do zmprov gdlm $i > /migration/dl/$i.txt ;echo "$i"; done

4. backup all account passwords

cd /migration
mkdir userpass
for i in `cat accounts.txt`; do zmprov  -l ga $i userPassword | grep userPassword: | awk '{ print $2}' > userpass/$i.shadow; done

5. backup all user,display and given names

cd /migration
mkdir userdata
for i in `cat accounts.txt`; do zmprov ga $i  | grep -i Name: > userdata/$i.txt ; done

6. backup all accounts data

cd /migration
mkdir accounts
for account in `cat /migration/accounts.txt`; do /opt/zimbra/bin/zmmailbox -z -m $account -t 0 getRestURL "//?fmt=tgz" > accounts/$account.tgz ;  echo $account done; done

7. backup aliases

cd /migration
mkdir alias
for i in `cat accounts.txt`; do zmprov ga  $i | grep zimbraMailAlias |awk '{print $2}' > alias/$i.txt ;echo $i ;done

Remove the ones that are empty files:

find /migration/alias/* -size 0 | xargs rm -f

8. backup COS (if different from the "source" server) If you have only the default COS on the "client", but its with different settings from the COS on the "source" server, you have to rename it and then import it under different name.

Create new entry as follows:

  • Host: "client" server IP
  • Port 389 ; Protocol v3
  • Base DN: cn=zimbra

Authentication:

  • Level: User + Password
  • User DN: cn=config
  • Password is the output from: zmlocalconfig -s ldap_root_password

Click OK.

  • From the left Tree View, expand "cos"
  • Select the COS that you want to export&move to the "source" server
  • From the File menu line above, click on LDIF > Export Subtree > Save on the local disk.
  • Do that with all COS you want to move.

(leave the JXplorer open for the import)

9. Create files for each COS, and their respective user members.

mkdir /migration/cos_users


SCRIPT:


#!/bin/bash

# The result is a file/s for each COS, and the users within this specific COS
# Note: If there are no custom created COS, there will be no users listed in the default and default_external files. That 
# means all users are in the "default" COS.
# Since the default and the default_external files will contain no users, their respective files are deleted at 
# the end. Zimbra only detect users that are not in the default COS. Thus, every non detected user is in the default COS. 

source ~/bin/zmshutil; zmsetvars

for i in `zmprov gac`
   do
       id=`zmprov gc $i | grep -e "\bzimbraId\b"|cut -d " " -f 2`

       ldapsearch -x -H $ldap_master_url -D $zimbra_ldap_userdn -w $zimbra_ldap_password| grep -e $id -e "dn: uid=" -e mail:|grep -v Email| grep -e zimbraCOSId -B1 -A1|grep mail|awk '{print $2}' > /migration/cos_users/$i

/bin/rm -rf /migration/cos_users/default*

done


10. backup Resource

The resource backup is the same as the COS explained in point 8 above. The one difference is that you need to specify different "Base DN:" when you login. The Resource is type of a user, and to see the users, we need to use the following bind dn:

dc=domain,dc=com

Az you substitute the above "domain" and "com" with your specific information. The rest is the same as in point 8.

--

11. RSYNC to the new server.

rsync -e ssh -axvzKHS  /migration/ root@10.0.0.1:/migration/

The 10.0.0.1 is the IP of the "source" server.


On the new server (SOURCE)

0. Restore COS To import to the "source" server:

  • Create new entry in the Softerra LDAP Admin browser as in the import, but this time specify the "source" server IP.
  • Click on, and expand "cn=cos"
  • File > Import Data > Select the LDIF to import > Import

Do that with all COS you want to import.


1. Restore Resource/s

Same as restoring COS, except the difference in the binding base dn, explained above in point 8.

2. Recreate all domains

for i in `cat /migration/domains.txt`; do  zmprov cd $i zimbraAuthMech zimbra ;echo $i ;done

3. Create the accounts and set the original passwords

3.1. Remove the resources from the accounts.txt file


SCRIPT:


#!/bin/bash
# Creates the users and sets the old passwords. 
# Use dummy password "zimbra" during the user creation

if [ $(whoami) != 'zimbra' ]; then
       echo "Must be zimbra to run $0"
       exit 1;
fi		
USERPASS="/migration/userpass"
USERDDATA="/migration/userdata"
USERS="/migration/accounts.txt"
for i in `cat $USERS`
do
givenName=$(grep givenName: $USERDDATA/$i.txt | cut -d ":" -f2)
displayName=$(grep displayName: $USERDDATA/$i.txt | cut -d ":" -f2)
shadowpass=$(cat $USERPASS/$i.shadow)
zmprov ca $i zimbra cn "$givenName" displayName "$displayName" givenName "$givenName" 
zmprov ma $i userPassword "$shadowpass"
done

4. Restore accounts data from the tgz files.

for i in `cat /migration/accounts.txt`; do zmmailbox -z -m $i postRestURL "/?fmt=tgz&resolve=skip" /migration/accounts/$i.tgz ; echo "$i done "; done

5. Add the moved users to their respecitve COS


SCRIPT:


#!/bin/bash
# The script first list the exported cos names, then iterate through all members within this cos and finally assigns the 
# user to the COS. 

for cos in `/bin/ls -1 /migration/cos_users | tr " " "\n"`
do
	for i in `cat /migration/cos_users/$cos`
		do
		zmprov sac $i $cos
		done
done


6. Recreate distribution lists

for i in `cat dlist.txt`; do zmprov cdl $i ; echo "$i done " ; done

7. Add members to the distribution lists

SCRIPT:


#!/bin/bash
# add all memebers to each of these distribution lists

if [ $(whoami) != 'zimbra' ]; then
       echo "Must be zimbra to run $0"
       exit 1;
fi		
 for i in `cat /migration/dlist.txt`
 do
	for j in `grep -v '#' dl/$i.txt |grep '@'` 
	do
	zmprov adlm $i $j
	echo " $j member has been added to list $i"
	done

done

8. Restore aliases

SCRIPT:


#!/bin/bash

if [ $(whoami) != 'zimbra' ]; then
       echo "Must be zimbra to run $0"
       exit 1;
fi		
for i in `cat /migration/accounts.txt`
do
	if [ -f "alias/$i.txt" ]; then
	for j in `grep '@' /migration/alias/$i.txt`
	do
	zmprov aaa $i $j
	echo "$i HAS ALIAS $j --- Restored"
	done
	fi
done


9. Post steps

Shut down the "client" server Fix the DNS entries


Additional Content










Verified Against: Zimbra Collaboration 8.7, 8.6, 8.0 Date Created: 28/09/2016
Article ID: https://wiki.zimbra.com/index.php?title=How_to_merge_two_independent_ZCS_servers_into_one Date Modified: 2016-12-24



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Wiki/KB reviewed by SME1 SME2 COPY EDITOR Last edit by Teodor Vizirov
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