Annotation of loncom/build/system_dependencies/sqltest.pl, revision 1.7
1.1 harris41 1: #!/usr/bin/perl
1.6 harris41 2:
3: # sqltest.pl - script to test MySQL database connectivity for LON-CAPA
1.1 harris41 4: #
1.7 ! harris41 5: # $Id: sqltest.pl,v 1.6 2002/08/06 23:18:25 harris41 Exp $
1.1 harris41 6: #
1.6 harris41 7: ###
8:
9: =pod
10:
11: =head1 NAME
12:
13: B<sqltest.pl> - Test interoperability of the MySQL server for use by LON-CAPA
14:
15: =cut
16:
17: # Written to help LON-CAPA (The LearningOnline Network with CAPA)
1.1 harris41 18: #
19: # YEAR=2001
20: # 9/25,9/30 Scott Harrison
1.4 harris41 21: # YEAR=2002
22: # 5/10,5/11 Scott Harrison
1.6 harris41 23: # 8/6/2002 and onwards, Scott Harrison, sharrison@users.sourceforge.net
24:
25: =pod
26:
27: =head1 SYNOPSIS
28:
29: perl sqltest.pl
30:
31: This script is ordinarily located inside the LON-CAPA source code tree.
32: This script is normally invoked by test-related targets inside
33: F<loncapa/loncom/build/Makefile>.
34:
35: =head1 DESCRIPTION
36:
37: This program tests the status of the MySQL database needed by the LON-CAPA
38: system. As with the other LON-CAPA test scripts, when reasonable, I try
39: to avoid importing functionality from other LON-CAPA modules so as to
40: avoid indirectly testing software dependencies.
41:
42: =head2 ORGANIZATION OF THIS PERL SCRIPT
43:
44: The script is organized into the following sections
45:
46: =over 4
47:
48: =item 1.
49:
50: Modules used by this script,
51:
52: =item 2.
53:
54: Initializations.
55:
56: =item 3.
57:
58: Read in current configuration.
59:
60: =item 4.
61:
62: Is this a library or access server?
63:
64: This step in the script is both a sanity check and also allows for other
65: future LON-CAPA server types (e.g. "admin", "backup", "firewall") to not
66: be required to have MySQL.
67:
68: =item 5.
69:
70: Make sure that the database can be accessed.
71:
72: If not, a variety of possible problems should be tested for, and a status
73: report should be issued to standard output.
74:
75: =item 6.
76:
77: Close database connection.
78:
79: This part of the script is only reached if the database was successfully
80: connected to.
81:
82: =item 7.
83:
84: Subroutines.
85:
86: B<configuration_scan> - look for PerlSetVar and store inside hash variable.
87:
88: =back
89:
90: =head1 STATUS
91:
92: Ratings: 1=horrible 2=poor 3=fair 4=good 5=excellent
93:
94: =over 4
1.1 harris41 95:
1.6 harris41 96: =item Organization
1.1 harris41 97:
1.6 harris41 98: 5
99:
100: =item Functionality
101:
102: 4
103:
104: =item Has it been tested?
105:
106: 3
107:
108: =back
109:
110: =head1 AUTHOR
111:
112: Scott Harrison, sharrison@users.sourceforge.net, 2001, 2002
113:
114: This software is distributed under the General Public License,
115: version 2, June 1991 (which is the same terms as LON-CAPA).
116:
117: This is free software; you can redistribute it and/or modify
118: it under the terms of the GNU General Public License as published by
119: the Free Software Foundation; either version 2 of the License, or
120: (at your option) any later version.
121:
122: This software is distributed in the hope that it will be useful,
123: but WITHOUT ANY WARRANTY; without even the implied warranty of
124: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
125: GNU General Public License for more details.
126:
127: You should have received a copy of the GNU General Public License
128: along with this software; if not, write to the Free Software
129: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.1 harris41 130:
1.6 harris41 131: =cut
1.1 harris41 132:
1.6 harris41 133: # ================================================ Modules used by this script.
1.1 harris41 134: use strict;
1.6 harris41 135: use DBI; # Needed to interface with the database.
1.1 harris41 136:
1.6 harris41 137: # ============================================================ Initializations.
1.1 harris41 138: $|=1;
1.2 harris41 139: print 'Probing for SQL metadata database'."\n\n";
1.1 harris41 140:
1.6 harris41 141: # ============================================== Read in current configuration.
1.1 harris41 142: my %perlvar;
1.6 harris41 143:
144: my $webconfdir='/etc/httpd/conf/';
145:
146: # NOTE: DEPRECATED scanning of access.conf
147: &configuration_scan(\%perlvar,$webconfdir.'access.conf');
148:
149: # Scanning the standard loncapa configuration files.
150: &configuration_scan(\%perlvar,$webconfdir.'loncapa.conf');
151: &configuration_scan(\%perlvar,$webconfdir.'loncapa_apache.conf');
152: # Note that the authoritative value for 'lonSqlAccess' comes from
153: # loncapa_apache.conf; this is why loncapa_apache.conf is scanned
154: # after loncapa.conf (in case a system administrator mistakenly
155: # specifies lonSqlAccess inside loncapa.conf).
156:
157: # ========================================== Is lonSqlAccess defined correctly?
158: unless ($perlvar{'lonSqlAccess'} and $perlvar{'lonSqlAccess'}!~/^\{\[\[\[\[/) {
159: print('**** ERROR **** The lonSqlAccess variable was not defined '.
160: 'correctly inside '.$webconfdir.'loncapa_apache.conf'."\n");
161: exit(1);
1.4 harris41 162: }
1.6 harris41 163: unless ($perlvar{'lonSqlAccess'} eq 'localhostkey') {
164: print('**** WARNING **** The lonSqlAccess variable is not set to the '.
165: 'standard expected value of "localhostkey"'."\n");
1.1 harris41 166: }
1.6 harris41 167:
168: # ========================================= Is this a library or access server?
169: unless ($perlvar{'lonRole'} eq 'library' or $perlvar{'lonRole'} eq 'access') {
170: print('**** NOTE **** SQL testing can only be run on a library or access '.
171: 'server. Skipping test.'."\n");
172: exit(0);
1.5 harris41 173: }
1.6 harris41 174:
175: # ================================ Make sure that the database can be accessed.
1.1 harris41 176: my $dbh;
177: {
178: unless (
179: $dbh = DBI->connect("DBI:mysql:loncapa","www",
180: $perlvar{'lonSqlAccess'},
1.6 harris41 181: {RaiseError=>0,PrintError=>0})
182: ) {
183: print('Cannot connect to database!'."\n");
184: # ------------------------------------ Check through possible problems.
185: my $problem_flag=0;
1.3 harris41 186: my $checkDBImodule=`perl pmvers DBI 2>/dev/null`;
187: my $checkMYSQLmodule=`perl pmvers Mysql 2>/dev/null`;
188: my $checkprocess=`/etc/rc.d/init.d/mysqld status`;
1.6 harris41 189:
190: # ---------------------------------------------- Issue a status report.
1.3 harris41 191: if (!$checkDBImodule) {
1.6 harris41 192: print('**** ERROR **** SYSTEM IS MISSING THE DBI PERL '.
193: 'MODULE (DBI.pm)'."\n");
194: $problem_flag=1;
1.3 harris41 195: }
1.6 harris41 196: if (!$checkMYSQLmodule) {
197: print('**** ERROR **** SYSTEM IS MISSING THE MYSQL PERL '.
198: 'MODULE (Mysql.pm)'."\n");
199: $problem_flag=1;
200: }
201: if (!-e '/etc/rc.d/init.d/mysqld') {
202: print('**** ERROR **** IT APPEARS THAT THE MYSQL SERVER HAS NOT '.
203: 'BEEN INSTALLED'."\n");
204: $problem_flag=1;
205: }
206: if ($checkprocess=~/is stopped/) {
207: print('**** ERROR **** IT APPEARS THAT THE MYSQL SERVER IS NOT '.
208: 'RUNNING'."\n");
1.3 harris41 209: print(<<END);
210: To fix temporarily, run the command:
211: /etc/rc.d/init.d/mysqld start
212:
213: You may also want to check and see that mysqld is started on boot time.
214:
215: /sbin/chkconfig --list mysqld
216:
217: This is bad output:
218: mysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
219:
220: This is good output:
221: mysqld 0:off 1:off 2:off 3:on 4:on 5:on 6:off
222:
223: To configure mysqld to launch correctly upon system startup, type the command:
224: /sbin/chkconfig --level 345 mysqld on
225: END
1.6 harris41 226: $problem_flag=1;
227: }
228: if ($checkprocess=~/mysqld dead but subsys locked/) {
229: print('**** ERROR **** IT APPEARS THAT THE MYSQLD PROCESSES'.
230: 'WERE SOMEHOW TERMINATED'."\n");
231: print(<<END);
232: To fix temporarily, run the command:
233: /etc/rc.d/init.d/mysqld restart
234: Double-check that your mysqld processes are running by using the command:
235: ps auxwww | grep mysqld
236:
237: Note that something really bad probably happened on your system to abnormally
238: shutdown the mysqld processes.
239: END
240: $problem_flag=1;
1.3 harris41 241: }
1.6 harris41 242: unless ($problem_flag) {
243: print('**** ERROR **** IT APPEARS THAT WWW@LOCALHOST AND/OR '.
244: 'PASSWORD ARE NOT CORRECTLY ENABLED'."\n");
1.3 harris41 245: print(<<END);
1.6 harris41 246: This is because all other known problems have been checked for.
247: By process of elimination, the assumption is that www\@localhost
248: must not be connecting to the database (a system administrator
249: at your institution may want to look at other possibilities however).
250:
1.3 harris41 251: To diagnose, try logging in from the command line with
252: mysql -u www -p mysql
253: and use the lonSqlAccess password
1.6 harris41 254: listed in loncapa_apache.conf (it normally is set to 'localhostkey').
255: If logging in fails to work, one possible approach is to REMOVE the
256: www\@localhost MySQL user.
257: [shell]\$ mysql -u root -p mysql
1.3 harris41 258: mysql> delete from user where user='www'
259: And then, you will need to repeat the MySQL configuration steps described at:
1.6 harris41 260: http://install.lon-capa.org/docs/install/index.html
1.3 harris41 261:
262: **** NOTE **** ANOTHER possibility is that you are not running
1.6 harris41 263: a compatible set of DBI, Mysql perl modules, and MySQL server software.
1.3 harris41 264: END
265: }
1.6 harris41 266: exit(1);
1.1 harris41 267: }
268: }
1.6 harris41 269: %perlvar=(); # clear memory
1.2 harris41 270:
1.6 harris41 271: print('SQL metadata database is found and is accessible'."\n");
1.1 harris41 272:
1.6 harris41 273: # ================================================== Close database connection.
1.1 harris41 274: $dbh->disconnect();
1.6 harris41 275:
276: # ================================================================ Subroutines.
277:
278: # --------- configuration_scan: look for PerlSetVar and store in hash variable.
279: sub configuration_scan {
280: my ($storagehashref,$filename)=@_;
1.7 ! harris41 281: # deprecated support for access.conf
! 282: open(CONFIG,$filename) or
! 283: ($filename=~/access\.conf$/ and return) or
! 284: (print("Can't read $filename\n") && exit(1));
1.6 harris41 285: while (my $configline=<CONFIG>) {
286: if ($configline =~ /^[^\#]*PerlSetVar/) {
287: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
288: chomp($varvalue);
289: $storagehashref->{$varname}=$varvalue;
290: }
291: }
292: close(CONFIG);
293: }
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