OX6:Open-Xchange Installation Guide for CentOS 5 622

From Open-Xchange

Open-Xchange Server 6 (v6.22) on CentOS5 Linux

This article will guide you through the installation of the Open-Xchange server, it describes the basic configuration and software requirements. As it is intended as a quick walk-through it assumes an existing installation of the operating system and requires average system administration skills. More, this guide will show you how to setup a basic installation with none of the typically used distributed environment settings. The objective of this guide is:

  • To setup a single server installation
  • To setup a database for a single database service, no replication
  • To setup a single Open-Xchange instance, no cluster
  • To provide a basic configuration setup, no mailserver configuration



Important: This installation guide will only work for v6.22. If you want to install v6.20 please use the installation guide for earlier versions.

Requirements

  • Plain installed CentOS5 with latest updates
  • A configured internet connection


Add Open-Xchange Repository

Open-Xchange maintains public available software repositories for different platforms, such as RHEL. This repository should be added to the RHEL installation to enable simple installation and updates.

Start a console and create a software repository file for Open-Xchange: 

$ vim /etc/yum.repos.d/ox.repo
[ox-appsuiteui]
name=Open-Xchange-appsuiteui
baseurl=https://software.open-xchange.com/products/appsuite/stable/appsuiteui/RHEL5/
gpgkey=https://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m

[ox-backend]
name=Open-Xchange-backend
baseurl=https://software.open-xchange.com/products/appsuite/stable/backend/RHEL5/
gpgkey=https://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m

# if you have a valid maintenance subscription, please uncomment the 
# following and add the ldb account data to the url so that the most recent
# packages get installed

[ox-updates-appsuiteui]
name=Open-Xchange Updates-appsuiteui
baseurl=https://LDBACCOUNT:LDBPASSWORD@software.open-xchange.com/products/appsuite/stable/appsuiteui/updates/RHEL5/
gpgkey=https://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m
 
[ox-updates-backend]
name=Open-Xchange Updates-backend
baseurl=https://LDBACCOUNT:LDBPASSWORD@software.open-xchange.com/products/appsuite/stable/backend/updates/RHEL5/
gpgkey=https://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m


In case there are issues with an username and password containing URL unsafe characters, e.g. an @, they have to be entered URL encoded. Details can be found at https://www.w3schools.com/tags/ref_urlencode.asp

In addition, you need to add this repository for the special meta package for centos:

repo below is for open-xchange-meta-centos 

[ox-centos]
name=Open-Xchange Misc
baseurl=http://software.open-xchange.com/OX6/6.22/backend/CentOS5/
gpgkey=http://software.open-xchange.com/oxbuildkey.pub
enabled=1
gpgcheck=1
metadata_expire=0m

Note: you need the open-xchange-meta-centos package because CentOS does not ship Sun Java packages and thus, installing Open-Xchange packages will fail because of missing dependencies. open-xchange-meta-centos fulfills the sun-java dependency and depends on openjdk6 as shipped with Centos.


Updating repositories and installing packages

Reload the package index. This will download the package descriptions available at the software repositories: 

$ yum update

The following command starts the download and installation process of all required package for Open-Xchange deployment:

If you want to install everything on a single server, just run 

$ yum install open-xchange open-xchange-authentication-database open-xchange-grizzly open-xchange-admin \
   open-xchange-gui

Note 1: You have to choose between one of the available spamhandler and authentication packages depending on your requirements.


Open-Xchange configuration

To avoid confusion right at the start notice that Open-Xchange uses multiple administration levels and requires different credentials at some stages at the installation and server management. Note that the passwords chosen at this guide are weak and should be replaced by stronger passwords.

  • The MySQL database user
    • Username: openexchange
    • Password used at this guide: db_password
    • Responsibility: Execute all kinds of database operations
  • The Open-Xchange Admin Master
    • Username: oxadminmaster
    • Password used at this guide: admin_master_password
    • Responsibility: Manage contexts, manage all kinds of low level server configuration
  • The Context Admin
    • Username: oxadmin
    • Password used at this guide: admin_password
    • Responsibility: Manage users/groups/resources inside a context

As stated above we assume the MySQL service has been installed previously, and it is running and available.

A good idea is to add the Open-Xchange binaries to PATH: 

$  echo PATH=$PATH:/opt/open-xchange/sbin/ >> ~/.bashrc && . ~/.bashrc

Now we have to initialize the Open-Xchange configdb database. This can all be done by executing the initconfigdb script. 

$ /opt/open-xchange/sbin/initconfigdb --configdb-pass=db_password -a --mysql-root-passwd=root_password

Use the --mysql-root-passwd option to supply the MySQL root password as configured during database installation.

Add the -i option if you want to remove an already existing open-xchange configdb.

Note: The -a parameter adds an openexchange account to MySQL. This account will be used for database connections from the OX App Suite middleware and requires some privileges. You can also create that account manually during database installation / configuration, in which case you can (should) skip the -a parameter here.

Before starting any service, all basic configuration files need to be set up correctly. The --configdb-pass option indicates the password of the openexchange database user previously created, the --master-pass options specifies the password of the Open-Xchange adminmaster user that will be created when executing the oxinstaller script.

Important: You should have your Open-Xchange license code at hand. If you do not plan to license Open-Xchange, you can use the option --no-license instead. Please also check OXReportClient documentation for more information about configuring a supported and maintained Open-Xchange server.

Important: For MAX_MEMORY_FOR_JAVAVM a rule of thumb for simple installations is half available system memory. The value must be in MB. For example "1024" for 1GB . 

$ /opt/open-xchange/sbin/oxinstaller --add-license=YOUR-OX-LICENSE-CODE \
--servername=oxserver --configdb-pass=db_password \
--master-pass=admin_master_password --network-listener-host=localhost --servermemory MAX_MEMORY_FOR_JAVAVM

Note: In a clustered setup, --network-listener-host must be set to *

Now is a good time to configure the way OX will authenticate to your mail server. Edit the file /opt/open-xchange/etc/mail.properties and change the com.openexchange.mail.loginSource to use. This is very important for servers that require your full email address to log in with. 

# adjust com.openexchange.mail.loginSource
$ vim /opt/open-xchange/etc/mail.properties

After initializing the configuration, start the Open-Xchange service by executing: 

$ /etc/init.d/open-xchange start

Next we have to register the local server at the Open-Xchange configdb database: 

$ /opt/open-xchange/sbin/registerserver -n oxserver -A oxadminmaster -P admin_master_password

Now we have to create a local directory that should be used as Open-Xchange filestore. This directory will contain all Infostore content and files attached to groupware objects. To maintain access by the Open-Xchange Groupware service, it is required to grant permissions to the open-xchange system user. 

$ mkdir /var/opt/filestore
$ chown open-xchange:open-xchange /var/opt/filestore

Now register the directory as a filestore at the Open-Xchange server: 

$ /opt/open-xchange/sbin/registerfilestore -A oxadminmaster -P admin_master_password \
-t file:/var/opt/filestore -s 1000000

Note: You might want to adapt the value provided with -s, the "The maximum size of the filestore in MB", see registerfilestore --help.

Note 2: If you are setting up OX App Suite, you need a shared filestore accross your OX servers even though you do not plan to have the OX Files feature enabled for your customers.

Finally register the groupware database, this is a separated database where all groupware specific data is stored: 

$ /opt/open-xchange/sbin/registerdatabase -A oxadminmaster -P admin_master_password \
-n oxdatabase -p db_password -m true



Configure services

Now as the Open-Xchange Server has been set up and the database is running, we have to configure the Apache webserver and the mod_proxy_ajp module to access the groupware frontend. To gain better GUI performance, the usage of mod_expires and mod_deflate is strongly recommended. Those modules will limit the amount of client requests and compress the delivered content. The default installation of the Apache webserver on CentOS provides a welcome screen which is not necessary for server operation, it can be removed by deleting the corresponding configuration file: 

$ rm /etc/httpd/conf.d/welcome.conf

Configure the mod_proxy_http module by creating a new Apache configuration file. 

$ vim /etc/httpd/conf.d/proxy_http.conf

<Location /webservices>
    # Please note that the servlet path to the soap API has changed:
    # restrict access to the soap provisioning API
    Order Deny,Allow
    Deny from all
    Allow from 127.0.0.1
    # you might add more ip addresses / networks here
    # Allow from 192.168 10 172.16
</Location>
# the old path is kept for compatibility reasons
<Location /servlet/axis2/services>
    # restrict access to the soap provisioning API
    Order Deny,Allow
    Deny from all
    Allow from 127.0.0.1
    # you might add more ip addresses / networks here
    # Allow from 192.168 10 172.16
</Location>

LoadModule proxy_http_module modules/mod_proxy_http.so

<IfModule mod_proxy_http.c>
   ProxyRequests Off
   # When enabled, this option will pass the Host: line from the incoming request to the proxied host.
   ProxyPreserveHost On
   <Proxy balancer://oxcluster>
       Order deny,allow
       Allow from all
       # multiple server setups need to have the hostname inserted instead localhost
       BalancerMember http://localhost:8009 timeout=100 smax=0 ttl=60 retry=60 loadfactor=50 route=OX1
       # Enable and maybe add additional hosts running OX here
       # BalancerMember http://oxhost2:8009 timeout=100  smax=0 ttl=60 retry=60 loadfactor=50 route=OX2
      ProxySet stickysession=JSESSIONID|jsessionid scolonpathdelim=On
      SetEnv proxy-initial-not-pooled
      SetEnv proxy-sendchunked
   </Proxy>
   # Define another Proxy Container with different timeout for the sync clients. Microsoft recommends a minimum value of 15 minutes.
   # Setting the value lower than the one defined as com.openexchange.usm.eas.ping.max_heartbeat in eas.properties will lead to connection
   # timeouts for clients.  See http://support.microsoft.com/?kbid=905013 for additional information.
   #
   # NOTE for Apache versions < 2.4:
   # When using a single node system or using BalancerMembers that are assigned to other balancers please add a second hostname for that
   # BalancerMember's IP so Apache can treat it as additional BalancerMember with a different timeout.
   #
   # Example from /etc/hosts: 127.0.0.1	localhost localhost_sync
   #
   # Alternatively select one or more hosts of your cluster to be restricted to handle only eas/usm requests
   <Proxy balancer://eas_oxcluster>
      Order deny,allow
      Allow from all
      # multiple server setups need to have the hostname inserted instead localhost
      BalancerMember http://localhost_sync:8009 timeout=1900 smax=0 ttl=60 retry=60 loadfactor=50 route=APP1
      # Enable and maybe add additional hosts running OX here
      # BalancerMember http://oxhost2:8009 timeout=1900  smax=0 ttl=60 retry=60 loadfactor=50 route=APP2
      ProxySet stickysession=JSESSIONID|jsessionid scolonpathdelim=On
      SetEnv proxy-initial-not-pooled
      SetEnv proxy-sendchunked
   </Proxy>
   # OX frontend
   <Proxy /ajax>
       ProxyPass balancer://oxcluster/ajax
   </Proxy>
   <Proxy /servlet>
       ProxyPass balancer://oxcluster/servlet
   </Proxy>
   <Proxy /infostore>
       ProxyPass balancer://oxcluster/infostore
   </Proxy>
   <Proxy /publications>
       ProxyPass balancer://oxcluster/publications
   </Proxy>
   # USM
   <Proxy /usm-json>
       ProxyPass balancer://oxcluster/usm-json
   </Proxy>
   # SOAP
   <Proxy /webservices>
       ProxyPass balancer://oxcluster/webservices
  </Proxy>
  <Proxy /realtime>
       ProxyPass balancer://oxcluster/realtime
  </Proxy>
   # OXtender/EAS specific proxy container with higher timeout
   <Proxy /Microsoft-Server-ActiveSync>
       ProxyPass balancer://eas_oxcluster/Microsoft-Server-ActiveSync
   </Proxy>
</IfModule>

Modify the default website settings to display the Open-Xchange GUI 

$ vim /etc/httpd/conf.d/ox.conf

<VirtualHost *:80>
	ServerAdmin webmaster@localhost

	DocumentRoot /var/www/html

	<Directory /var/www/html>
		AllowOverride None
		Order allow,deny
		allow from all
		RedirectMatch ^/$ /ox6/
               Options +FollowSymLinks +SymLinksIfOwnerMatch
	</Directory>
       # deflate
      AddOutputFilterByType DEFLATE text/html text/plain text/javascript application/javascript text/css text/xml application/xml text/x-js application/x-javascript

	# pre-compressed files
	AddType text/javascript .jsz
	AddType text/css .cssz
	AddType text/xml .xmlz
        AddType text/plain .po
	
	AddEncoding gzip .jsz .cssz .xmlz
	SetEnvIf Request_URI "\.(jsz|cssz|xmlz)$" no-gzip
	
	ExpiresActive On
	
	<Location /ox6>
	        # Expires (via ExpiresByType to override global settings)
	        ExpiresByType image/gif "access plus 6 months"
	        ExpiresByType image/png "access plus 6 months"
	        ExpiresByType image/jpg "access plus 6 months"
	        ExpiresByType image/jpeg "access plus 6 months"
	        ExpiresByType text/css "access plus 6 months"
	        ExpiresByType text/html "access plus 6 months"
	        ExpiresByType text/xml "access plus 6 months"
	        ExpiresByType text/javascript "access plus 6 months"
	        ExpiresByType text/x-js "access plus 6 months"
	        ExpiresByType application/x-javascript "access plus 6 months"
	        ExpiresDefault "access plus 6 months"
	        Header append Cache-Control "private"
	        Header unset Last-Modified
	        Header unset Vary
	        # Strip version
	        RewriteEngine On
	        RewriteRule v=\w+/(.+) $1 [L]
	        # Turn off ETag
	        Header unset ETag
	        FileETag None
	</Location>
	
	<Location /ox6/ox.html>
	        ExpiresByType text/html "now"
	        ExpiresDefault "now"
	        Header unset Last-Modified
	        Header set Cache-Control "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
	        # Turn off ETag
	        Header unset ETag
	        FileETag None
	</Location>
	
	<Location /ox6/index.html>
	        ExpiresByType text/html "now"
	        ExpiresDefault "now"
	        Header unset Last-Modified
	        Header set Cache-Control "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
	        # Turn off ETag
	        Header unset ETag
	        FileETag None
	</Location>
</VirtualHost>

After the configuration is done, restart the Apache webserver 

$ /etc/init.d/httpd restart

Adding services to runlevels

The new services are now installed and configured, but to make them start up on a server boot, they need to be added to some runlevels: 

$ chkconfig --level 345 mysqld on
$ chkconfig --level 345 httpd on
$ chkconfig --level 345 open-xchange on

Creating contexts and users

Now as the whole setup is complete and you already should get a login screen when accessing the server with a webbrowser, we have to setup a context and a default user as the last step of this tutorial.

The mapping defaultcontext will allow you to set this context as the default one of the entire system so that users which will be created within this context can login into Open-Xchange Server without specifying their domain at the login screen. Only one context can be specified as defaultcontext. The oxadmin user that will be created by this command is the default admin of the created context. This account will gather additional functions that are also described in the administration manual. The context id parameter must to be unique and numeric, otherwise the server will complain when you try to create a context. New contexts must be created by the oxadminmaster user, user accounts inside a context are created with the credentials of the contexts oxadmin account. The access-combination-name property defines the set of available modules and functions for users of the context. 

$ /opt/open-xchange/sbin/createcontext -A oxadminmaster -P admin_master_password -c 1 \
-u oxadmin -d "Context Admin" -g Admin -s User -p secret -L defaultcontext \
-e oxadmin@example.com -q 1024 --access-combination-name=all

Create a user for testing purposes: 

$ /opt/open-xchange/sbin/createuser -c 1 -A oxadmin -P secret -u testuser \
-d "Test User" -g Test -s User -p secret -e testuser@example.com \
--imaplogin testuser --imapserver 127.0.0.1 --smtpserver 127.0.0.1

Now connect to the server with a webbrowser and login using the credentials testuser / secret.


Log files and issue tracking

Whenever unexpected or erroneous behavior takes place, it will be logged depending on the configured loglevel. All logfiles are stored at the operating systems default location. Events triggered by the Open-Xchange Groupware services are logged to a rotating file open-xchange.log, events triggered by the Open-Xchange Administration service are logged to open-xchange-admin.log. Those files are the very first place to monitor. 

$ tail -f -n200 /var/log/open-xchange/open-xchange.log.0
$ tail -f -n200 /var/log/open-xchange/open-xchange-admin.log.0
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