Deploying the Unison bidirectional Synchronization Service in CentOS 6.5

Deploying the Unison bidirectional Synchronization Service in CentOS 6.5

Deploying the Unison bidirectional Synchronization Service in CentOS 6.5

Environment Introduction:

ServerIPServer1192.168.30.131Server2192.168.30.132

1. Add host mutual trust:

A. Add the host file (in Server1 and Server2 respectively ):

[Root @ localhost ~] # Echo-e "192.168.30.131 Server1 \ n192.168.30.132 Server2">/etc/hosts

B. Change the host name (in Server1 and Server2 respectively ):

[Root @ localhost ~] # Sed-I "s/HOSTNAME =. */HOSTNAME = Server1/g"/etc/sysconfig/network

[Root @ localhost ~] # Hostname Server1

　　C. log out and log on again. The host name is displayed.

　　D. Add mutual trust

D1:

[Root @ Server1 ~] # Ssh-keygen-t rsa

[Root @ Server1 ~] # Ssh-copy-id-I/root/. ssh/id_rsa.pub root @ Server2

D2:

[Root @ Server2 ~] # Ssh-keygen-t rsa

[Root @ Server2 ~] # Ssh-copy-id-I/root/. ssh/id_rsa.pub root @ Server1

　　

2. Unison Installation

Various unison versions:
Http://www.seas.upenn.edu /~ Bcpierce/unison // download.html
Unison Compiler:
Http://caml.inria.fr/pub/distrib/ocaml-3.10

　　　　

　　　　2.1 install the compilation tool: Objective Caml compiler

[Root @ Server1 soft] # cd ocaml-3.10.2 + rc1/

[Root @ Server1 ocaml-3.10.2 + rc1] #./configure

[Root @ Server1 ocaml-3.10.2 + rc1] # make world opt

[Root @ Server1 ocaml-3.10.2 + rc1] # make install & echo OK

　　　　

　　　　2.2 installing Unison:

[Root @ Server1 unison-2.13.16] # cd ../unison-2.13.16

[Root @ Server1 unison-2.13.16] # make UISTYLE = text THREADS = true

An error occurs:

/Bin/sh: etags: command not found

Make [1]: [tags] Error 127 (ignored)
Make [1]: Leaving directory '/soft/unison-100'

Solution:

Yum-y install ctags-etags

Re-compile:

[Root @ Server1 unison-2.13.16] # make UISTYLE = text THREADS = true

[Root @ Server1 unison-2.13.16] # make install & echo OK

If the following error is reported:

Mv/root/bin // unison/tmp/unison-10301

Mv: cannot stat '/root/bin // unison': No such file or directory
Make: [doinstall] Error 1 (ignored)
Cp unison/root/bin/
Cp: cannot create regular file '/root/bin/': Is a directory
Make: *** [doinstall] Error 1

Solution:

[Root @ Server2 unison-2.13.16] # mkdir/root/bin

[Root @ Server2 unison-2.13.16] # cp unison/root/bin/

Re-compile:

[Root @ Server1 unison-2.13.16] # make install & echo OK

　　　　

　　　　2.3 modify the configuration file;

[Root @ Server1 data] # cat/root/. unison/default. prf

# Unison preferences file
Root =/data
Root = ssh: // root @ Server2 // data
# Path = www
# Ignore = Path wp-content/tmp
Ignore = Path wp-config.php # ignoring wp-config.php files is equivalent to rsync's exclude
# Nodeletion =/data
Batch = true
Maxthreads = 300
# Repeat = 1
Owner = true
Group = true
Perms =-1
Fastcheck = false
Sshargs =-C
Xferbycopying = true
Log = true
Logfile =/tmp/unison. log

　　　　2.4 create a synchronization directory/data

[Root @ Server1 ~] # Mkdir/data

[Root @ Server1 ~] # Echo "aa"> aa.txt

　　　　

　　　　2.5 The steps above the same operation on Server 2 are skipped here

　　　　

　　　　2.6 test Synchronization

[Root @ Server1 ~] # Unison-servercmd

[Root @ Server1 data] # unison-servercmd =/root/bin/unison
Contacting server...
Looking for changes
Waiting for changes from server
Reconciling changes

Local Server2
New file ----> bb.txt
Local: new file modified on at 14:42:45 size 5 rw-r -- user = 0 group = 0
Server2: absent
Propagating updates

UNISON started propagating changes at 14:43:10 on 19 Aug 2015
[BGN] Copying bb.txt
From/data
To // Server2 // data
[END] Copying bb.txt
UNISON finished propagating changes at 14:43:10 on 19 Aug 2015

Saving synchronizer state
Synchronization complete (1 item transferred, 0 skipped, 0 failures)
[Root @ Server1 data] #