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version 1.1, 2007/05/31 23:48:09 version 1.9, 2013/12/16 13:53:28
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 <h1>Installing LON-CAPA on a minimal Red Hat Enterprise Linux 5 System</h1>  <h1>Installing LON-CAPA on a minimal Red Hat Enterprise Linux 5 System</h1>
 <p>  <p>
 This document guides you through the process of setting up a new LON-CAPA  This document guides you through the process of setting up a new LON-CAPA
 server running Red Hat Enterprise Linux 5 with a minimum of packages installed.    server running Red Hat Enterprise Linux 5 with a minimum of packages installed.
 The computer will be configured solely as a LON-CAPA server and will be   The computer will be configured solely as a LON-CAPA server and will be
 expected to have no other services running.  Your server is expected to have  expected to have no other services running.  Your server is expected to have
 a reasonably fast connection to the internet.  a reasonably fast connection to the internet.
 </p><p>  </p><p>
 More information is available at   More information is available at
 <a href="http://install.lon-capa.org/">http://install.lon-capa.org/</a>.  <a href="http://install.lon-capa.org/">http://install.lon-capa.org/</a>.
 </p>  </p>
   
Line 14  More information is available at Line 14  More information is available at
 <p>  <p>
 Installing Linux is getting easier and easier.  Installing Linux is getting easier and easier.
 You will be required to log in to the machine and execute  You will be required to log in to the machine and execute
 some routine Unix commands.  Familiarity with the Apache web server, mod_perl,   some routine Unix commands.  Familiarity with the Apache web server, mod_perl,
 perl, and MySQL are not required to install and run LON-CAPA.  perl, and MySQL are not required to install and run LON-CAPA.
 </p>  </p>
   
Line 23  perl, and MySQL are not required to inst Line 23  perl, and MySQL are not required to inst
 The installation process takes the following steps:  The installation process takes the following steps:
 </p>  </p>
 <ol>  <ol>
   <li> Obtain Red Hat Enterprise Linux 5 installation CDs</li>    <li><a href="#obt">Obtain Red Hat Enterprise Linux 5 installation CDs</a></li>
   <li> Determine Network Settings</li>    <li><a href="#net">Determine Network Settings</a></li>
   <li> Install Red Hat Enterprise Linux 5 </li>    <li><a href="#lin">Install Red Hat Enterprise Linux 5</a></li>
   <li> Update your system </li>    <li><a href="#upd">Update your system</a></li>
   <li> Install LON-CAPA </li>    <li><a href="#ilc">Install LON-CAPA</a></li>
   <li> Create a Domain Coordinator </li>    <li><a href="#cdc">Create a Domain Coordinator</a></li>
   <li> Start/Restart services </li>    <li><a href="#sts">Start/Restart services</a></li>
   <li> Log in to LON-CAPA </li>    <li><a href="#log">Log in to LON-CAPA</a></li>
 </ol>  </ol>
   
 <h2>Obtain Red Hat Enterprise Linux 5 CDs</h2>  <hr>
   <h2>1. <a name="obt">Obtain Red Hat Enterprise Linux 5 CDs</a></h2>
 <p>  <p>
 RHEL5 CDs can be purchased from Red Hat:    RHEL5 CDs can be purchased from Red Hat:
 <a href="http://redhat.com/">http://redhat.com/</a>.  <a href="http://redhat.com/">http://redhat.com/</a>.
 For the minimal install on 32-bit architecture you will need only the first CD.  For the minimal install on 32-bit architecture you will need only the first CD.
 For the minimal install on 64-bit architecture you will need only the first CD.  For the minimal install on 64-bit architecture you will need CDs 1, 2, and 4.
   </p>
 </p>   
   
 <h2>Determine Network Settings</h2>  <h2>2. <a name="net">Determine Network Settings</a></h2>
 <p>  <p>
 You will need to know the following network settings for your installation.    You will need to know the following network settings for your installation.
 <b>Note:</b>You must have a static IP address to use LON-CAPA.  <b>Note:</b>You must have a static IP address to use LON-CAPA.
 DHCP is <em>not</em> supported.  DHCP is <em>not</em> supported.
   
Line 56  DHCP is <em>not</em> supported. Line 56  DHCP is <em>not</em> supported.
   <li>domain name server(s) </li>    <li>domain name server(s) </li>
 </ul>  </ul>
   
 <h2>Minimal  Red Hat Enterprise Linux 5 Install</h2>  <h2>3. <a name="lin">Minimal  Red Hat Enterprise Linux 5 Install</a></h2>
 <p>  <p>
 Installing Red Hat Enterprise Linux is quite easy if you've installed any of the Red Hat products  Installing Red Hat Enterprise Linux is quite easy if you've installed any of the Red Hat products
 before. Documentation is available from  before. Documentation is available from
 <a href="http://www.redhat.com/docs/manuals/enterprise/">  <a href="http://www.redhat.com/docs/manuals/enterprise/">
 http://www.redhat.com/docs/manuals/enterprise/</a>  http://www.redhat.com/docs/manuals/enterprise/</a>
 Most of the installation screens are self explanatory.    Most of the installation screens are self explanatory.
 There are a few steps that require comment and are dealt with below.  There are a few steps that require comment and are dealt with below.
 </p>  </p>
 <dl style="list-style:square outside none">  <dl style="list-style:square outside none">
      <dt>Installation Language</dt>
      <dd>Use English as your installation language.</dd>
    <dt>Installation Type</dt>     <dt>Installation Type</dt>
    <dd>If this is a fresh install choose "Install Red Hat Enterprise Linux Server". If updating from a previous LON-CAPA installation on an earlier Redhat or Fedora version you may prefer to choose the upgrade option, although if you established a separate partition for /home it will be faster to perform an install instead of an upgrade, and use "Create Custom Layout" to set up partitions - making sure to select the "unchanged data" option for the /home partition, in order to preserve your existing LON-CAPA data. A full back-up to tape or some external system is also strongly advised when updating the operating system in use on an existing LON-CAPA server.</dd>     <dd>If this is a fresh install choose "Install Red Hat Enterprise Linux Server". If updating from a previous LON-CAPA installation on an earlier Redhat or Fedora version you may prefer to choose the upgrade option, although if you established a separate partition for /home it will be faster to perform an install instead of an upgrade, and use "Create Custom Layout" to set up partitions - making sure to select the "unchanged data" option for the /home partition, in order to preserve your existing LON-CAPA data. A full back-up to tape or some external system is also strongly advised when updating the operating system in use on an existing LON-CAPA server.</dd>
   
Line 74  There are a few steps that require comme Line 75  There are a few steps that require comme
    <dd>For a fresh install may want to use the automatic partitioning feature of the installer,     <dd>For a fresh install may want to use the automatic partitioning feature of the installer,
        however you should review the results and be prepared to modify them.  If you want to customize partitioning use "Create Custom Layout".         however you should review the results and be prepared to modify them.  If you want to customize partitioning use "Create Custom Layout".
        LON-CAPA resource files are stored in the /home directory, so the         LON-CAPA resource files are stored in the /home directory, so the
        majority of the disk space should be allocated here.  If you have 20 GB          majority of the disk space should be allocated here.  If you have 20 GB
        of space for RHEL, /home should receive at least 10 to 12 gigs.           of space for RHEL, /home should receive at least 10 to 12 gigs.
        Since MySQL uses the /var filesystem to store its databases you should         Since MySQL uses the /var filesystem to store its databases you should
        have at least 4 gigs of space available on /var.  Be sure to          have at least 4 gigs of space available on /var.  Be sure to
        include adequate swap space.  A minimum is 512 Megs, but you should         include adequate swap space.  A minimum is 512 Megs, but you should
        typically have 1 or 2x as much swap space as you do physical RAM.</dd>         typically have 1 or 2x as much swap space as you do physical RAM.</dd>
   
    <dt>Network Configuration</dt>     <dt>Network Configuration</dt>
    <dd>LON-CAPA will <b>not</b> work with a machine set up to use a dynamic      <dd>LON-CAPA will <b>not</b> work with a machine set up to use a dynamic
        IP address.  When configuring your network card, be sure to unselect         IP address.  When configuring your network card, be sure to unselect
        the DHCP option and enter in your network information.</dd>         the DHCP option and enter in your network information.</dd>
    <dt>Software</dt>     <dt>Software</dt>
    <dd>Click the "Customize Now" radio button and for a minimal install uncheck all packages except "Base" in the Base System category.  If you leave other packages checked in any of the other categories, you'll need additional ISO CDs.</dd>     <dd>Click the "Customize Now" radio button and for a minimal install uncheck all packages except "Base" in the Base System category.  If you leave other packages checked in any of the other categories, you'll need additional ISO CDs.</dd>
 </dl>  </dl>
 <p>  <p>
   
 Finish installing your server, reboot it, and log in as root. The  Finish installing your server, reboot it, and log in as root. The
 first time you log-in, the Setup Agent will be displayed. (If you exit it early you can enter it again buy running the command  first time you log-in, the Setup Agent will be displayed. (If you exit it early you can enter it again buy running the command
   </p>
 <pre>  <pre>
 setup  setup
 </pre>  </pre>
  This should tool be used to configure the Firewall and SELinux.  <h3>Firewall and SELinux Configuration</h3>
   <p>
   <dt>Firewall Configuration</dt>  This tool should be used to configure the Firewall and SELinux.
   
    <dd>Select Security Level: Enabled, and Customize, to allow  
        incoming: SSH (remote login), WWW (HTTP) and secure WWW  
        (HTTPS). (LON-CAPA also will use ports 5663 and 8080, but the  
        loncontrol startup script should open and close thos ports  
        itself.)  
    </dd>  
    <dd> Set SELinux to Disabled.</dd>     
    <dd> Select OK, and then Quit</dd>  
 </p>  </p>
   <ol>
     <li>Select Security Level: Enabled, and Customize, to allow
         incoming: SSH (remote login), WWW (HTTP) and secure WWW
         (HTTPS).
     </li>
     <li>Set SELinux to Disabled.</li>
     <li>Select OK, and then Quit</li>
   </ol>
   
 <h2>Update your system</h2>  <h2>4. <a name="upd">Update your system</a></h2>
 <p>  <p>
 Update your system to the latest versions of the system software using yum.  Update your system to the latest versions of the system software using yum.
 </p>  </p>
Line 128  wget http://install.loncapa.org/versions Line 128  wget http://install.loncapa.org/versions
 <p>  <p>
 Install the rhel5_loncapa_yum.conf  Install the rhel5_loncapa_yum.conf
 </p>  </p>
 <p>  
 <pre>  <pre>
 mv /etc/yum.conf /etc/yum.conf.backup  mv /etc/yum.conf /etc/yum.conf.backup
 cp rhel5_loncapa_yum.conf /etc/yum.conf  cp rhel5_loncapa_yum.conf /etc/yum.conf
 yum update  yum update
 </pre>  </pre>
 </p>  
 <h2>Installing LON-CAPA</h2>  <h2>5. <a name="ilc">Installing LON-CAPA</a></h2>
 <h3>Install prerequisites</h3>  <h3>Install prerequisites</h3>
 <p> Execute: </p>  <p> Execute: </p>
 <pre>  <pre>
 yum install LONCAPA-prerequisites  yum install LONCAPA-prerequisites
 </pre><p>  </pre><p>
 This may take a moment due to LON-CAPA's large number of dependencies.  This may take some minutes due to LON-CAPA's large number of dependencies.
 </p>  </p>
 <h3>Retrieve and execute LON-CAPA setup program</h3>  <h3>Retrieve and execute LON-CAPA setup program</h3>
 <p>  <p>
 Retrieve the LON-CAPA setup with the following command:  Retrieve the LON-CAPA setup with the following command:
 </p>  </p>
 <pre>  <pre>
 wget http://install.loncapa.org/versions/redhat/5Server/rhel5_install.tar  wget http://install.loncapa.org/linux/install.tar
 </pre>  </pre>
 <p>  <p>
 Extract the archive with the following command:  Extract the archive with the following command:
Line 165  cd installation Line 164  cd installation
 ./install.pl  ./install.pl
 </pre>  </pre>
 <p>  <p>
 This script will prompt you for the MySQL root password and will download the latest LON-CAPA release.<br />  The script is used to prepare a Linux system to run LON-CAPA, and can also be
 You can safely ignore the following warnings from gcc 4 when compiling pwauth:<br />  used to check the configuration of a system on which LON-CAPA has already been installed.  Typically, though, you will run this script only once, when you first install LON-CAPA.
 <tt>  </p>
 pwauth.c: In function ‘lastlog’:  <p>
 <ul>  The script will analyze your system to determine which actions are recommended.  The script will then prompt you to choose the actions you would like taken.
 <li>pwauth.c:541: warning: incompatible implicit declaration of built-in function ‘strncpy’</li>  Once a choice has been entered for all nine possible actions, required changes will be made.
 <li>pwauth.c:543: warning: incompatible implicit declaration of built-in function ‘strlen’</li>  </p>
 </ul>  <p>The possible actions are:</p>
 pwauth.c: In function ‘main’:  
 <ul>  <ul>
 <li>pwauth.c:692: warning: incompatible implicit declaration of built-in function ‘strlen’</li>  <li>Create the www user/group</li>
   <li>Install the package LON-CAPA uses to authenticate users.</li>
   <li>Set-up the MySQL database</li>
   <li>Set-up MySQL permissions</li>
   <li>Configure Apache web server</li>
   <li>Configure start-up of services</li>
   <li>Check firewall settings</li>
   <li>Stop services not used by LON-CAPA,<br>
       e.g., services for a print server: cups daemon</li>
   <li>Download LON-CAPA source code in readiness for installation</li>
 </ul>  </ul>
 </tt>  
   
 </p>  
   
 <h3>Determine LON-CAPA Settings</h3>  <h3>Determine LON-CAPA Settings</h3>
 <p>  <p>
 LON-CAPA requires a number of identifying parameters to be set in order  LON-CAPA requires a number of identifying parameters to be set in order
Line 191  for it to function at all.  Below is a l Line 194  for it to function at all.  Below is a l
   <dd>The server must be designated a 'library' or an 'access' server.  In    <dd>The server must be designated a 'library' or an 'access' server.  In
       general you should have a library server for your instructors to create        general you should have a library server for your instructors to create
       their course content on and run their courses.  Students should connect        their course content on and run their courses.  Students should connect
       to access servers.  If you are doing the first install of LON-CAPA at         to access servers.  If you are doing the first install of LON-CAPA at
       your site, or if you are playing with it for your own edification you        your site, or if you are playing with it for your own edification you
       should make your machine a 'library' server.</dd>        should make your machine a 'library' server.</dd>
   <dt>LON-CAPA domain</dt>    <dt>LON-CAPA domain</dt>
   <dd>Each site or school which installs LON-CAPA needs its own domain.    <dd>Each site or school which installs LON-CAPA needs its own domain.
       Here at MSU we use 'msu'.  You should choose something short but        Here at MSU we use 'msu'.  You should choose something short but
       meaningful.  <i>Restriction: One word, no hyphens, underscores, or         meaningful.  <i>Restriction: One word, no hyphens, underscores, or
       special characters.</i><br />Domain names which include a departmental         special characters.</i><br>Domain names which include a departmental
       abbreviation are not recommended as although LON-CAPA may start in        abbreviation are not recommended as although LON-CAPA may start in
       a single department, other departments frequently join subsequently.        a single department, other departments frequently join subsequently.
       For a domain name: 'msu' is a superior choice to 'msuphys' for example.        For a domain name: 'msu' is a superior choice to 'msuphys' for example.
   </dd>    </dd>
   <dt>LON-CAPA host id</dt>    <dt>LON-CAPA host id</dt>
   <dd>Each LON-CAPA server requires a unique internal name.  We use names    <dd>Each LON-CAPA server requires a unique internal name.  We use names
       such as "msul1" for the first library server. <i>Restriction: One word,         such as "msul1" for the first library server. <i>Restriction: One word,
       no hyphens, underscores, or special characters.</i>        no hyphens, underscores, or special characters.</i>
   </dd>    </dd>
   <dt>Domain's Primary Library Server ID</dt>    <dt>Domain's Primary Library Server ID</dt>
    <dd>If you are setting up a domain with a single library server, then the domain's primary library server ID will be the LON-CAPA host id of that server (e.g., msul1). Once your domain grows and you need to add more servers, one of the library servers in the domain should be assigned as the domain's primary library server.  This will be where domain-wide settings will be stored.<dd>     <dd>If you are setting up a domain with a single library server, then the domain's primary library server ID will be the LON-CAPA host id of that server (e.g., msul1). Once your domain grows and you need to add more servers, one of the library servers in the domain should be assigned as the domain's primary library server.  This will be where domain-wide settings will be stored.<dd>
   <dt>Host administrator email</dt>    <dt>Host administrator email</dt>
   <dd>The amount of email sent to this address is relatively minimal.  Messages    <dd>The amount of email sent to this address is relatively minimal.  Messages
       are sent every time the system starts up, or if the system is in         are sent every time the system starts up, or if the system is in
       serious trouble. On a laptop, make this <tt>root@localhost</tt>.        serious trouble. On a laptop, make this <tt>root@localhost</tt>.
   </dd>    </dd>
   <dt>Support email address</dt>    <dt>Support email address</dt>
   <dd>If you enter an e-mail address here, then users of the system      <dd>If you enter an e-mail address here, then users of the system
       will be able to click an "Ask Helpdesk" link in the system to         will be able to click an "Ask Helpdesk" link in the system to
       display a web form which they will complete to request support from        display a web form which they will complete to request support from
       your institution's helpdesk. On form submission the contents         your institution's helpdesk. On form submission the contents
       will be sent to the e-mail address you specify.         will be sent to the e-mail address you specify.
   </dd>    </dd>
 </dl>  </dl>
   
Line 229  for it to function at all.  Below is a l Line 232  for it to function at all.  Below is a l
 To configure and install LON-CAPA, execute the following commands:  To configure and install LON-CAPA, execute the following commands:
 </p>  </p>
 <pre>  <pre>
 cd /root/loncapa-N.N     (N.N should correspond to a version number like '1.3')  cd /root/loncapa-X.Y.Z     (X.Y.Z should correspond to a version number like '2.10.0')
 ./UPDATE  ./UPDATE
 </pre>  </pre>
 <p>  <p>
 You will need to enter the LON-CAPA configuration information you determined   You will need to enter the LON-CAPA configuration information you determined
 in the previous section.    in the previous section.
 </p>  </p>
   
 <h2>Creating a Domain Coordinator</h2>  <h2>6. <a name="cdc">Creating a Domain Coordinator</a></h2>
 <p>  <p>
 You will need at least one user at your site who has the role of  You will need at least one user at your site who has the role of
 'domain coordinator'.  This user creates accounts for other users and  'domain coordinator'.  This user creates accounts for other users and
 grants them additional privileges.  The make_domain_coordinator.pl script  grants them additional privileges.  The make_domain_coordinator.pl script
 invoked below requires that you enter the users password.  The password will  invoked below requires that you enter the user's password. 
 show in plaintext as you type it.  Feel free to use the "passwd username"  Feel free to use the "passwd username" command to change it later.
 command to change it later.  Replace USERNAME and DOMAIN with an   Replace USERNAME and DOMAIN with an appropriate user name and your domain.
 appropriate user name and your domain.  
 </p>  </p>
 <pre>  <pre>
 cd /root/loncapa-N.N/loncom/build  cd /root/loncapa-X.Y.Z/loncom/build
 perl make_domain_coordinator.pl USERNAME DOMAIN  perl make_domain_coordinator.pl USERNAME DOMAIN
 (WILL PROMPT FOR PASSWORD HERE)  
 </pre>  </pre>
   
 <h2>Start/Restart Services</h2>  <h2>7. <a name="sts">Start/Restart Services</a></h2>
 <p>  <p>
 The LON-CAPA network services take a moment to start.  Most misconfigurations  The LON-CAPA network services take a moment to start.  Most misconfigurations
 will be apparent at this step.  will be apparent at this step.
Line 264  will be apparent at this step. Line 265  will be apparent at this step.
 </pre>  </pre>
 <p>  <p>
 If you receive warnings when starting the httpd about missing perl modules,  If you receive warnings when starting the httpd about missing perl modules,
 please make sure you followed the instructions in   please make sure you followed the instructions in
 <b>Installing LON-CAPA Dependencies</b>.  If you still have errors, please  <b>Installing LON-CAPA Dependencies</b>.  If you still have errors, please
 contact the MSU LON-CAPA support team.  contact the MSU LON-CAPA group.
 </p>  </p>
 <h2>Log in to your LON-CAPA Machine</h2>  
   <h2>8. <a name="log">Log in to your LON-CAPA Machine</a></h2>
 <p>  <p>
 Point a web browser at your new machine and log in as the domain  Point a web browser at your new machine and log in as the domain
 coordinator.  Congratulations!  coordinator.  Congratulations!
 </p>  </p>
   
   <hr>
 <h2>If things aren't working right</h2>  <h2>If things aren't working right</h2>
 <p>  <p>
 If you've followed the steps above and the server doesn't start or you think   If you've followed the steps above and the server doesn't start or you think
 there's something wrong, please send a <a href="http://support.loncapa.org/help">help request</a> to the MSU LON-CAPA support team.  If there were errors in installation of the dependency RPMs or errors during the  there's something wrong, please send a <a href="http://help.loncapa.org/help">help request</a> to the MSU LON-CAPA group.  If there were errors in installation of the dependency RPMs or errors during the
 automatic setup, please send us as much information as possible.  automatic setup, please send us as much information as possible.
 If some part of this document is unclear please let us know.  If some part of this document is unclear please let us know.
 </p>  </p>
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