Difference between revisions of "CentOS7Install"

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m (Fixed configure statement to reflect postgresql database)
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== RT 4.4.2 installation on CentOS 7.4.1708 ==
== RT 4.4.2 installation on CentOS 7.4.1708 ==


NOTE:  Original Document was for CentOS 7.2 and RT 4.4.1 with MySQL.  Updated for Centos 7.4, RT 4.4.2 with PostgreSQL.
NOTE:  Original Document was for CentOS 7.2 and RT 4.4.1 with MySQL.  Updated for CentOS 7.4, RT 4.4.2 with PostgreSQL.


This document provides a quick methodology for installing RT 4.4.2 on CentOS/RHEL 7.4 for an internet-connected server.  It should be suitable with minor modifications for installation on CentOS 6.9 also.  Where necessary notes about the different install steps for CentOS/RHEL 6.9 are indicated below.
This document provides a quick methodology for installing RT 4.4.2 on CentOS/RHEL 7.4 for an internet-connected server.  There is a separate CentOS 6.9 install at https://rt-wiki.bestpractical.com/wiki/CentOS6Install.


# Assumptions
# Assumptions
Line 10: Line 10:
  * httpd (Apache) 2.4 and mod_fcgid Apache modules were used as the host environment.
  * httpd (Apache) 2.4 and mod_fcgid Apache modules were used as the host environment.
  * Testing was conducted in both KVM and vSphere environments.
  * Testing was conducted in both KVM and vSphere environments.
* Note that the EPEL repository is not required for installation on CentOS 7.


== Installation Steps ==
.8 are indicated below.
# Assumptions
* Access to the internet and CentOS OS and update repositories is available.
* Installation testing was completed using CentOS 7.2.1511 minimal boot ISO.
* httpd (Apache) 2.4 and mod_fcgid Apache modules were used as the host environment.
* Testing was conduct
# OS Installation and Initial Configuration
# OS Installation and Initial Configuration
  * (!) It is possible to automate the majority of this section using kickstart files.
  * (!) It is possible to automate the majority of this section using kickstart files.
Line 26: Line 19:
<pre>yum install expat gd graphviz openssl expat-devel gd-devel graphviz-devel  openssl-devel perl perl-CPAN wget screen mod_fcgid postgresql-server postgresql-devel
<pre>yum install expat gd graphviz openssl expat-devel gd-devel graphviz-devel  openssl-devel perl perl-CPAN wget screen mod_fcgid postgresql-server postgresql-devel
yum groupinstall "Development Tools" "Web Server"</pre>
yum groupinstall "Development Tools" "Web Server"</pre>
  * NOTE: Instead of MySQL/MariaDB (as per the previous version of this document), we've switched to PostgreSQL to enable future full text search enablement.
  * NOTE: We use PostgreSQL as the DB which allows us to enable full text search. (This is a change from the previous version of the document which used MySQL/MariaDB.)
## Patch OS
## Patch OS
<pre>yum update</pre>
<pre>yum update</pre>
* Reboot the OS.
* If you are continuing to next step immediately, you do not need to reboot.
## Disable selinux, by editing /etc/sysconfig/selinux:
## Disable selinux, by editing /etc/sysconfig/selinux:
<code>SELINUX=disabled</code>
<code>SELINUX=disabled</code>
  * reboot the OS
  * reboot the OS
## Initialize the database:
<pre>postgresql-setup initdb</pre>
## Adjust local services:
## Adjust local services:
<pre>systemctl enable postgresql.service
<pre>systemctl enable postgresql.service
Line 39: Line 32:
systemctl start postgresql.service
systemctl start postgresql.service
systemctl stop httpd.service</pre>
systemctl stop httpd.service</pre>
* CentOS 6.8:
<pre>chkconfig postgresql on
chkconfig httpd on
service postgresql start
service httpd stop</pre>
  * NOTE:  httpd service needs to be stopped to allow RT web based configuration later.
  * NOTE:  httpd service needs to be stopped to allow RT web based configuration later.
# Configure Supporting Software
# Configure Supporting Software
## Initialize the database:
## Configure postgres user password for postgresql, where 'xxx' is the 'password':
<pre>postgresql-setup initdb</pre>
## Configure postgres user password for postgresql:
<pre>sudo -u postgres psql
<pre>sudo -u postgres psql
   ALTER USER postgres PASSWORD 'xxx';
   ALTER USER postgres PASSWORD 'xxx';
Line 55: Line 41:
## Reconfigure postgres local user access
## Reconfigure postgres local user access
Configure PostgreSQL to use md5 passwords (needed for RT).  Edit /var/lib/pgsql/data/pg_hba.conf and modify the following line from peer to md5:
Configure PostgreSQL to use md5 passwords (needed for RT).  Edit /var/lib/pgsql/data/pg_hba.conf and modify the following line from peer to md5:
<code>local all all               md5</code>
<pre># "local" is for Unix domain socket connections only
#local  all        all                              ident
local  all         all                               md5</pre>
## Install CPAN minus.
## Install CPAN minus.
<pre>curl -L http://cpanmin.us | perl - --sudo App::cpanminus</pre>
<pre>curl -L http://cpanmin.us | perl - --sudo App::cpanminus</pre>
# RT Dependencies and Installation
# RT Dependencies and Installation
## Get RT and extract to /tmp.
## Get RT
<pre>wget https://download.bestpractical.com/pub/rt/release/rt-4.4.2.tar.gz
<pre>mkdir rt
tar xvzf rt-4.4.2.tar.gz -C /tmp
cd rt
wget https://download.bestpractical.com/pub/rt/release/rt-4.4.2.tar.gz
wget https://download.bestpractical.com/pub/rt/release/rt-4.4.2.tar.gz.asc</pre>
## Verify downloads
* NOTE: Release notes are found at https://bestpractical.com/release-notes/rt/4.4.2
* extract the sha256sums from the release notes online and add them to a new sha256sum.txt file.
<pre>b2e366e18c8cb1dfd5bc6c46c116fd28cfa690a368b13fbf3131b21a0b9bbe68  rt-4.4.2.tar.gz
2185c2be31b352ad0a7605f9a4e4720b2c3607df75aae1c0cbace9eb9e6fcef8  rt-4.4.2.tar.gz.asc</pre>
* confirm the files:
<pre>sha256sum -c sha256sum.txt</pre>
## Extract the files
<pre>tar xvzf rt-4.4.2.tar.gz -C /tmp
cd /tmp/rt-4.4.2</pre>
cd /tmp/rt-4.4.2</pre>
## Configure RT:
## Configure RT:
Line 120: Line 119:
## Start apache:
## Start apache:
<pre>systemctl start httpd.service</pre>
<pre>systemctl start httpd.service</pre>
* CentOS 6.8: <code>service httpd start</code>
## Modify firewalld
## Modify firewalld
  * Complete your firewalld configuration to suite your local requirements.
  * Complete your firewalld configuration to suite your local requirements.
  * (!) NOTE:  Depending on install method, firewalld may not be installed.  You can also stop it for testing with the <code>systemctl stop firewalld</code> command.
  * (!) NOTE:  Depending on install method, firewalld may not be installed.  You can also stop it for testing with the <code>systemctl stop firewalld</code> command.
* On CentOS 6.8, you will need to modify your iptables configuration, or stop iptables using <code>service iptables stop</code>
# Installation Complete
# Installation Complete
## Access RT
## Access RT
  * Connect to RT using your web browser and start your site customization.
  * Connect to RT using your web browser and start your site customization.

Revision as of 12:39, 11 April 2018

RT 4.4.2 installation on CentOS 7.4.1708

NOTE: Original Document was for CentOS 7.2 and RT 4.4.1 with MySQL. Updated for CentOS 7.4, RT 4.4.2 with PostgreSQL.

This document provides a quick methodology for installing RT 4.4.2 on CentOS/RHEL 7.4 for an internet-connected server. There is a separate CentOS 6.9 install at https://rt-wiki.bestpractical.com/wiki/CentOS6Install.

  1. Assumptions
* Access to the internet and CentOS OS and update repositories is available.
* Installation testing was completed using CentOS 7.4.1708 minimal boot ISO.
* httpd (Apache) 2.4 and mod_fcgid Apache modules were used as the host environment.
* Testing was conducted in both KVM and vSphere environments.
* Note that the EPEL repository is not required for installation on CentOS 7.
  1. OS Installation and Initial Configuration
* (!) It is possible to automate the majority of this section using kickstart files.
    1. Install OS.
* Install the OS from ISO or PXE boot using your normal methodology.
    1. Install prerequisites for RT from OS repository.
yum install expat gd graphviz openssl expat-devel gd-devel graphviz-devel  openssl-devel perl perl-CPAN wget screen mod_fcgid postgresql-server postgresql-devel
yum groupinstall "Development Tools" "Web Server"
* NOTE: We use PostgreSQL as the DB which allows us to enable full text search. (This is a change from the previous version of the document which used MySQL/MariaDB.)
    1. Patch OS
yum update
    1. Disable selinux, by editing /etc/sysconfig/selinux:

SELINUX=disabled

* reboot the OS
    1. Initialize the database:
postgresql-setup initdb
    1. Adjust local services:
systemctl enable postgresql.service
systemctl enable httpd.service
systemctl start postgresql.service
systemctl stop httpd.service
* NOTE:  httpd service needs to be stopped to allow RT web based configuration later.
  1. Configure Supporting Software
    1. Configure postgres user password for postgresql, where 'xxx' is the 'password':
sudo -u postgres psql
  ALTER USER postgres PASSWORD 'xxx';
  \q
* NOTE:  This step configures the internal DB postgres password for the local instance of postgresql
    1. Reconfigure postgres local user access

Configure PostgreSQL to use md5 passwords (needed for RT). Edit /var/lib/pgsql/data/pg_hba.conf and modify the following line from peer to md5:

# "local" is for Unix domain socket connections only
#local   all         all                               ident
local   all         all                               md5
    1. Install CPAN minus.
curl -L http://cpanmin.us | perl - --sudo App::cpanminus
  1. RT Dependencies and Installation
    1. Get RT
mkdir rt
cd rt
wget https://download.bestpractical.com/pub/rt/release/rt-4.4.2.tar.gz
wget https://download.bestpractical.com/pub/rt/release/rt-4.4.2.tar.gz.asc
    1. Verify downloads
* NOTE: Release notes are found at https://bestpractical.com/release-notes/rt/4.4.2
* extract the sha256sums from the release notes online and add them to a new sha256sum.txt file.
b2e366e18c8cb1dfd5bc6c46c116fd28cfa690a368b13fbf3131b21a0b9bbe68  rt-4.4.2.tar.gz
2185c2be31b352ad0a7605f9a4e4720b2c3607df75aae1c0cbace9eb9e6fcef8  rt-4.4.2.tar.gz.asc
* confirm the files:
sha256sum -c sha256sum.txt
    1. Extract the files
tar xvzf rt-4.4.2.tar.gz -C /tmp
cd /tmp/rt-4.4.2
    1. Configure RT:
./configure --enable-graphviz --enable-gd --with-web-user=apache --with-web-group=apache --with-db-type=Pg
    1. Configure RT to use cpanm for fixdeps:
export RT_FIX_DEPS_CMD=/usr/local/bin/cpanm
    1. Test the dependencies:
make testdeps
    1. Install the dependencies:
make fixdeps
* NOTE:  You may need to run the command more than once.  On RHEL/CentOS 6.9, you may need to manually force the addition of the GD perl module via cpanm GD --force, as there is a known issue with one of the built in tests for GD.
    1. Confirm dependencies:
make testdeps
    1. Install RT (default install is to the /opt/rt4 directory):
 make install
  1. RT Configuration using Web Interface
* (!) It is possible to complete this step by editing the RT files directly, and creating the database.  Refer to the RT documentation for manual steps.
    1. Start the first run installation instance:
/opt/rt4/sbin/rt-server
    1. Configure using the web interface.
* Access the server using a web browser to access the http port.
* Configure the RT instance using the web interface.  Refer to the RT documentation.
    1. Shutdown the rt-server instance.
* When completed Ctrl-C the rt-server instance started above.
  1. Configure RT:
* Modify RT to allow web access using a trailing /rt
* (!) This is a personal preference.  The web server example in the next section assumes /rt is used.
    1. Modify /opt/rt4/etc/RT_SiteConfig.pm. Add the following line:

Set( $WebPath, '/rt' );

  1. Configure web server
    1. Modify /etc/httpd/conf.d/fcgid.conf. Add:

FcgidMaxRequestLen 1073741824

    1. Create /etc/httpd/conf.d/rt.conf:
# RT4 configuration for Apache
### Optional apache logs for RT
# Ensure that your log rotation scripts know about these files
# ErrorLog /opt/rt4/var/log/apache2.error
# TransferLog /opt/rt4/var/log/apache2.access
# LogLevel debug

AddDefaultCharset UTF-8

Alias /rt/NoAuth/images /opt/rt4/share/html/NoAuth/images/

ScriptAlias /rt /opt/rt4/sbin/rt-server.fcgi/

DocumentRoot "/opt/rt4/share/html"

<Location /rt>
  # For Centos7/Apache 2.4 this line:
  Require all granted
  # For Centos6/Apache 2.2 these two lines:
  # Order allow,deny
  # Allow from all
  Options +ExecCGI
  AddHandler fcgid-script fcgi
</Location>
    1. Start apache:
systemctl start httpd.service
    1. Modify firewalld
* Complete your firewalld configuration to suite your local requirements.
* (!) NOTE:  Depending on install method, firewalld may not be installed.  You can also stop it for testing with the systemctl stop firewalld command.
  1. Installation Complete
    1. Access RT
* Connect to RT using your web browser and start your site customization.