Annotation of doc/build/oracle6_install.frag, revision 1.2
1.1 raeburn 1: <h1>Installing LON-CAPA on a minimal Oracle Linux 6 System</h1>
2: <p>
3: This document guides you through the process of setting up a new LON-CAPA
4: server or virtual machine running Oracle Linux 6 with a minimum of packages installed.
5: The server or virtual machine will be configured solely as a LON-CAPA server and will be
6: expected to have no other services running. Your server or virtual machine is expected to have
7: a fast connection to the internet.
8: </p><p>
9: More information is available at
10: <a href="http://install.lon-capa.org/">http://install.lon-capa.org/</a>.
11: </p>
12:
13: <h2>Before you begin</h2>
14: <p>
15: Installing Linux is straightforward.
16: You will be required to log in to the machine and execute
17: some routine Unix commands. Familiarity with the Apache web server, mod_perl,
18: perl, and MySQL are not required to install and run LON-CAPA.
19: </p>
20:
21: <h2>Installation Overview</h2>
22: <p>
23: The installation process takes the following steps:
24: </p>
25: <ol>
26: <li><a href="#obt">Obtain Oracle Linux 6 installation iso file</a></li>
27: <li><a href="#net">Determine Network Settings</a></li>
28: <li><a href="#lin">Install Oracle Linux 6</a></li>
29: <li><a href="#upd">Update your system</a></li>
30: <li><a href="#ilc">Install LON-CAPA</a></li>
31: <li><a href="#cdc">Create a Domain Coordinator</a></li>
32: <li><a href="#sts">Start/Restart services</a></li>
33: <li><a href="#log">Log in to LON-CAPA</a></li>
34: </ol>
35:
36: <hr />
37: <h2>1. <a id="obt">Obtain Oracle Linux 6</a></h2>
38: <p>
39: Oracle Linux 6 isos can be obtained from links included on the
40: <a href="https://www.oracle.com/technetwork/server-storage/linux/downloads/index.html">Oracle Linux download page</a>.
41: You only need download either the Oracle Linux 6 Update 10 Boot ISO image for $basearch iso,
42: or the Oracle Linux Update 6 Update 10 for $basearch iso.
43: </p>
44:
45: <h2>2. <a id="net">Determine Network Settings</a></h2>
46: <p>
47: You will need to know the following network settings for your installation.
48: <b>Note: </b>You must have a static IP address to use LON-CAPA.
49: DHCP is <em>not</em> supported.
50:
51: <ul>
52: <li>ip address </li>
53: <li>netmask </li>
54: <li>hostname </li>
55: <li>gateway </li>
56: <li>domain name server(s) </li>
57: </ul>
58:
59: <h2>3. <a id="lin">Minimal Oracle Linux 6 Install</a></h2>
60: <p>
61: Documentation is available from
62: <a href="https://docs.oracle.com/en/operating-systems/oracle-linux/6/">
63: https://docs.oracle.com/en/operating-systems/oracle-linux/6/</a>
64: Most of the installation screens are self explanatory.
65: There are a few steps that require comment and are dealt with below.
66: </p>
67: <dl style="list-style:square outside none">
68: <dt>Installation Language</dt>
69: <dd>Use English as your installation language.</dd>
70: <dt>Installation Destination</dt>
71: <dd>For a fresh install may want to use the automatic partitioning feature of the installer.
72: If you want to customize partitioning check the "Custom" radio button in the Storage
73: Configuration section, and push the "Done" button. You will then be prompted to create
74: mount points.
75: LON-CAPA resource files are stored in the /home directory, so the
76: majority of the disk space should be allocated here. If you have 20 GB
77: of space for Oracle Linux, /home should receive at least 10 to 12 GB.
78: Since Mariadb uses the /var filesystem to store its databases you should
79: have at least 4 GB of space available on /var. Be sure to
80: include adequate swap space. A minimum is 512 MB, but you should
81: typically have 1 or 2x as much swap space as you do physical RAM.</dd>
82: <dt>Network and Hostname</dt>
83: <dd>LON-CAPA will <b>not</b> work with a machine set up to use a dynamic
84: IP address. When configuring your network card, be sure to unselect
85: the DHCP option and enter your network information. Enter your hostname</dd>
86: <dt>Software Selection</dt>
87: <dd>Check the "Minimal Install" radio button in the "Base Environment" panel.</dd>
88: </dl>
89: <p>
90: Finish installing your server, reboot it, and log in as root.
91: </p>
92: <h2>4. <a id="upd">Update your system</a></h2>
93: <p>
94: Update your system to the latest versions of the system software using yum.
95: </p>
96: <pre>
97: yum update
98: </pre>
99: <p>
100: If the kernel was updated, reboot your system before continuing with the installation.
101: </p>
102:
103: <h3>Set up access to package repositories</h3>
104: <p>Install wget</p>
105: <pre>
106: yum install wget
107: </pre>
108: <p>
109: Add yum repository for EPEL (Extra Packages for Enterprise Linux)
110: </p>
111: <pre>
112: yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
113: </pre>
114: <p>
1.2 ! raeburn 115: Enable the Oracle Linux Add ons Repository
1.1 raeburn 116: </p>
117: <pre>
118: yum-config-manager --enable public_ol6_addons
119: </pre>
120: <p>
121: Install the loncapa.repo file from the LON-CAPA install site:
122: </p>
123: <pre>
124: wget -O /etc/yum.repos.d/loncapa.repo http://install.loncapa.org/versions/oracle/6/loncapa.repo
125: </pre>
126: <p>
127: Verify the required repositories are enabled:
128: </p>
129: <pre>
130: yum repolist enabled
131: </pre>
132: <p>
133: The list of enabled repos should be as follows:
134: </p>
135: <table style="border: 0px; border-collapse: collapse;">
136: <tr><th>repo id</th><th>repo name</th></tr>
137: <tr><td>loncapa-updates-basearch</td><td>Oracle Linux 6 LON-CAPA $basearch Updates</td></tr>
138: <tr><td>loncapa-updates-noarch</td><td>Oracle Linux 6 LON-CAPA noarch Updates</td></tr>
139: <tr><td>public_ol6_UEKR4</td><td>Latest Unbreakable Enterprise Kernel Releases 4 for Oracle Linux 6Server ($basearch)</td></tr>
140: <tr><td>public_ol6_addons</td><td>Oracle Linux 6Server Add ons ($basearch)</td></tr>
141: <tr><td>public_ol6_latest</td><td>Oracle Linux 6Server Latest ($basearch)</td></tr>
142: </table>
143:
144: <h3>Configure SELinux</h3>
145: <p>
146: The default Oracle Linux 6 installation includes SELinux enabled.
147: Until such time as an SELinux security policy has been created for LON-CAPA, SELinux should be disabled.
148: Retrieve the loncapa_selinux_config file from the LON-CAPA install site:
149: </p>
150: <pre>
151: wget http://install.loncapa.org/versions/oracle/6/loncapa_selinux_config
152: </pre>
153: <p>
154: Install the selinux config file
155: </p>
156: <pre>
157: mv /etc/selinux/config /etc/selinux/config.backup
158: mv loncapa_selinux_config /etc/selinux/config
159: reboot
160: </pre>
161:
162: <h2>5. <a id="ilc">Installing LON-CAPA</a></h2>
163: <h3>Install prerequisites</h3>
164: <p> Execute: </p>
165: <pre>
166: yum install LONCAPA-prerequisites
167: </pre><p>
168: This may take some minutes due to LON-CAPA's large number of dependencies.
169: </p>
1.2 ! raeburn 170: <p>
! 171: Reboot
! 172: </p>
! 173: <pre>
! 174: reboot
! 175: </pre>
1.1 raeburn 176: <h3>Configure firewall and network</h3>
177: <p> Execute: </p>
178: <pre>
179: system-config-firewall-tui
180: </pre>
181: <ol>
182: <li>Select Firewall: Enabled, and Customize, to allow
183: incoming: SSH (remote login), WWW (HTTP) and secure WWW
184: (HTTPS).
185: </li>
186: <li> Select OK, and then Yes to save</li>
187: </ol>
188: <h3>Retrieve and execute LON-CAPA setup program</h3>
189: <p>
190: Retrieve the LON-CAPA setup with the following command:
191: </p>
192: <pre>
193: wget http://install.loncapa.org/linux/install.tar
194: </pre>
195: <p>
196: Extract the archive with the following command:
197: </p>
198: <pre>
199: tar xf install.tar
200: </pre>
201: <p>
202: This creates a directory named <span style="font-family: 'Lucida Console','Menlo','Monaco','Courier', monospace;">installation</span>.
203: Change to it and execute the setup script with the following commands:
204: </p>
205: <pre>
206: cd installation
207: ./install.pl
208: </pre>
209: <p>
210: The script is used to prepare a Linux system to run LON-CAPA, and can also be
211: 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.
212: </p>
213: <p>
214: 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.
215: Once a choice has been entered for all nine possible actions, required changes will be made.
216: </p>
217: <p>The possible actions are:</p>
218: <ul>
219: <li>Create the www user/group</li>
220: <li>Install the package LON-CAPA uses to authenticate users.</li>
221: <li>Set-up the MySQL (Mariadb) database</li>
222: <li>Set-up MySQL (Mariadb) permissions</li>
223: <li>Configure Apache web server</li>
224: <li>Configure start-up of services</li>
225: <li>Check firewall settings</li>
226: <li>Stop services not used by LON-CAPA, e.g., services for a print server: cups daemon</li>
227: <li>Download LON-CAPA source code in readiness for installation</li>
228: </ul>
229: <h3>Determine LON-CAPA Settings</h3>
230: <p>
231: LON-CAPA requires a number of identifying parameters to be set in order
232: for it to function at all. Below is a list with descriptions.
233: </p>
234: <dl>
235: <dt>Host Type (library or access)</dt>
236: <dd>The server must be designated a 'library' or an 'access' server. In
237: general you should have a library server for your instructors to create
238: their course content on and run their courses. Students should connect
239: to access servers. If you are doing the first install of LON-CAPA at
240: your site, or if you are playing with it for your own edification you
241: should make your machine a 'library' server.</dd>
242: <dt>LON-CAPA domain</dt>
243: <dd>Each site or school which installs LON-CAPA needs its own domain.
244: Here at MSU we use 'msu'. You should choose something short but
245: meaningful. <i>Restriction: One word, no underscores, and no special
246: characters except . or -</i> .<br />Domain names which include a departmental
247: abbreviation are not recommended as although LON-CAPA may start in
248: a single department, other departments frequently join subsequently.
249: For a domain name: 'msu' is a superior choice to 'msuphys' for example.
250: </dd>
251: <dt>LON-CAPA host id</dt>
252: <dd>Each LON-CAPA server requires a unique internal name. We use names
253: such as "msul1" for the first library server. <i>Restriction: One word,
254: no underscores, and no special characters except -</i> .
255: </dd>
256: <dt>Domain's Primary Library Server ID</dt>
257: <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>
258: <dt>Host administrator email</dt>
259: <dd>The amount of email sent to this address is relatively minimal. Messages
260: are sent every time the system starts up, or if the system is in
261: serious trouble. If you are installing a LON-CAPA instance on a laptop,
262: because you are planning to contribute to LON-CAPA development,
263: make this <span style="font-family: 'Lucida Console','Menlo','Monaco','Courier', monospace;">
264: root@localhost</span>.
265: </dd>
266: <dt>Support email address</dt>
267: <dd>Enter an e-mail address here, so users of the system
268: will be able to click an "Ask Helpdesk" link in the system to
269: display a web form which they will complete to request support from
270: your institution's helpdesk. On form submission the contents
271: will be sent to the e-mail address you specify.
272: </dd>
273: </dl>
274:
275: <h3>Configuring LON-CAPA</h3>
276: <p>
277: To configure and install LON-CAPA, execute the following commands:
278: </p>
279: <pre>
280: cd /root/loncapa-X.Y.Z (X.Y.Z should correspond to a version number like '2.11.3')
281: ./UPDATE
282: </pre>
283: <p>
284: You will need to enter the LON-CAPA configuration information you determined
285: in the previous section.
286: </p>
287:
288: <h2>6. <a id="cdc">Creating a Domain Coordinator</a></h2>
289: <p>
290: You will need at least one user at your site who has the role of
291: 'domain coordinator'. This user creates accounts for other users and
292: grants them additional privileges. The make_domain_coordinator.pl script
293: invoked below requires that you enter the user's password.
294: Feel free to use the "passwd username" command to change it later.
295: Replace USERNAME and DOMAIN with an appropriate user name and your domain.
296: If installing a library server and an access server on separate machines or VMs
297: you need only run make_domain_coordinator.pl on the library server.
298: </p>
299: <pre>
300: cd /root/loncapa-X.Y.Z/loncom/build
301: perl make_domain_coordinator.pl USERNAME DOMAIN
302: </pre>
303:
304: <h2>7. <a id="sts">Start/Restart Services</a></h2>
305: <p>
306: The LON-CAPA network services take a moment to start. Most misconfigurations
307: will be apparent at this step.
308: </p>
309: <pre>
310: /etc/init.d/loncontrol start
311: service httpd start
312: </pre>
313: <p>
314: If you receive warnings about missing perl modules, when starting the httpd service
315: please make sure that the LONCAPA-prerequisites rpm is installed using this command:
316: </p>
317: <pre>
318: rpm -q LONCAPA-prerequisites
319: </pre>
320: <p>
321: If it is not installed, ensure that the required Linux repositories are enabled (see
322: the "Set up access to package repositories" section above), then install it:
323: </p>
324: <pre>
325: yum install LONCAPA-prerequisites
326: </pre>
327: <p>
328: If you still have errors, please contact the LON-CAPA Helpdesk: helpdesk at loncapa.org
329: </p>
330: <p>Ensure that LON-CAPA network services and the httpd service are set to start on boot:
331: <pre>
332: /sbin/chkconfig loncontrol on
333: /sbin/chkconfig httpd on
334: </pre>
335:
336: <h2>8. <a id="log">Log in to your LON-CAPA Machine</a></h2>
337: <p>
338: Point a web browser at your new machine and log in as the domain
339: coordinator. Congratulations!
340: </p>
341:
342: <hr>
343: <h2>If things aren't working right</h2>
344: <p>
345: If you've followed the steps above and the server doesn't start or you think
346: there's something wrong, please contact the LON-CAPA helpdesk.
347: Installation/update support is available from: helpdesk at loncapa.org
348: (replace " at " with @).
349: If there were errors in installation of the dependency RPMs or errors during the
350: automatic setup, please send us as much information as possible.
351: If some part of this document is unclear please let us know.
352: </p>
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