RT server configuration

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Run the command by hand (backgrounded) to start the milter process before the next reboot.
Run the command by hand (backgrounded) to start the milter process before the next reboot.
Run "postfix reload" to pick up the changed configuration.
Run "newaliases" and "postfix reload" to pick up the changed configuration.
==Apache httpd configuration==
==Apache httpd configuration==

Revision as of 13:41, 20 November 2017

This page contains notes on the setup of the MIT krb5 RT server. The current server is krbdev.mit.edu; krbdev-prod-app-1.mit.edu is the staging server for migration from Ubuntu 9.04 to Ubuntu 16.04.



RT has the following perl dependencies, along with the corresponding Ubuntu packages they reside in:

 Digest::MD5                           perl
 Storable                              perl
 DBI 1.18                              libdbi-perl
 DBIx::DataSource 0.02                 libdbix-datasource-perl
 DBIx::SearchBuilder 0.48              libdbix-searchbuilder-perl
 HTML::Entities                        libhtml-parser-perl
 MLDBM                                 libmldbm-perl
 Net::Domain                           perl-modules
 Net::SMTP                             perl-modules
 Params::Validate 0.02                 libparams-validate-perl
 HTML::Mason 1.02                      libhtml-mason-perl
 CGI::Cookie 1.20                      perl-modules
 Apache::Cookie                        libapache2-request-perl
 Apache::Session 1.53                  libapache-session-perl
 Date::Parse                           libtimedate-perl
 Date::Format                          libtimedate-perl
 MIME::Entity 5.108                    libmime-tools-perl
 Mail::Mailer 1.20                     libmailtools-perl
 Getopt::Long 2.24                     perl-base
 Tie::IxHash                           libtie-ixhash-perl
 Text::Wrapper                         libtext-wrapper-perl
 Text::Template                        libtext-template-perl
 File::Spec 0.8                        perl-base
 Errno                                 perl-base
 FreezeThaw                            libfreezethaw-perl
 File::Temp                            perl-modules
 Log::Dispatch 1.6                     liblog-dispatch-perl

The data in RT is stored in a PostgreSQL database. The postgresql Ubuntu package will install the recommended version of PostgreSQL for the current Ubuntu version.

The mail interface to RT is handled by Postfix, so the postfix package is required. The libsendmail-pmilter-perl package is required for the custom milter script.

The web front end to RT is an Apache2 web server, so the apache2 package is required. RT uses a FastCGI server which must run as the rt user, so the libapache2-mod-fastcgi and apache2-suexec-pristine packages are required.

In sum, the following packages must be installed on the RT server:


User accounts

The postgresql package will create a postgres user account.

The following user accounts and group entries must be created manually:

  • group rt
  • user rt: primary group rt, homedir /var/rt2, shell /bin/false
  • user rtcvs: primary group rt, homedir /var/rt2, shell /bin/sh

These accounts could be created with:

 groupadd -r rt
 useradd -r -m -g rt -d /var/rt2 -s /bin/false rt
 useradd -r -g rt -d /var/rt2 rtcvs

Some of the above accounts may be created by ops during provisioning.

/var/rt2 should contain an empty .k5login file, managed by ops. It should contain a .ssh/authorized_keys file, managed by ops, containing the krbsnap key from /git/krb5.git/hooks/krbsnap_rsa_key.pub on drugstore.mit.edu.

RT setup

Our installation of Request Tracker is a modified version 2.0.13. Most of the modifications were tracked in CVS; the repository is on drugstore at /cvs/krbdev in the tracking subdirectory. drugstore no longer serves CVS, so the repository must be copied out and checked out locally. A few changes have been made on the running server without version control. Absent a proper version control setup for the running version of RT, it is necessary to transfer the contents of /var/rt2 from the old server to the new.

Several scripts do come from the krbdev-services repository, in the rt-cvs and rt-scripts directories. All are installed in /var/rt2/bin.

In root's crontab file ("crontab -e" as root), add the following to perform daily maintenance:

 0 3 * * * /var/rt2/bin/krb5-daily.sh

PostgreSQL configuration

Many PostgreSQL files live in directories specific to the PostgreSQL major and minor version, such as /etc/postgresql/8.3 for PostgreSQL 8.3.

The Ubuntu postgresql package will create a "main" cluster with a configuration directory in /etc/postgresql/<version>/main.

In /etc/postgresql/<version>/main/pg_ident.conf, add:

 local		root		root
 local		root		postgres
 local		root		rt_user
 local		rt		rt_user
 local		rtcvs		rt_user
 local		postfix		rt_user
 local		nobody		rt_user

In /etc/postgresql/<version>/main/pg_hba.conf, find the line that reads "local all all peer" and add "map=local" to the end, so it reads "local all all peer map=local". Comment out the line that reads "local all postgres peer", despite the warning not to disable it. Run "service postgresql restart" to reread the affected files. Run "psql -Upostgres --list" to verify that the identity map works.

Run "createuser -Upostgres rt_user" to create the rt_user role.

Run "createdb -ESQL_ASCII -Upostgres -Ttemplate0 rt2" to create the database. This database can be removed with "dropdb -Upostgres rt2" if it becomes necessary to recreate it.

Run "pg_dump -Upostgres -Fc rt2 > /path/to/dumpfile" on the old server, transfer the file to the new server, and run "pg_restore -Upostgres -d rt2 /path/to/dumpfile" on the new server to restore the database. As a simple verification, run "psql -Upostgres -c 'SELECT * FROM keywords;' rt2" on both servers and verify that the tables have the same number of rows.

Postfix configuration

In /etc/postfix/main.cf:

  • Set myhostname = krbdev.mit.edu
  • Set mydestination = krbdev.mit.edu, krbdev-prod-app-1.mit.edu, localhost.mit.edu, localhost
  • Add the following to the end:
 # Suppress some headers to avoid leaking internal addresses to spammers.
 prepend_delivered_header =
 enable_original_recipient = no
 # RT header milter
 smtpd_milters = unix:private/milter

Copy /etc/aliases from the old server. To avoid aiding spammers, its contents are not reproduced here. In particular, /etc/aliases contains an internal address corresponding to the membership of the krb5-bugs-incoming mailman list; revealing this address could allow spammers to bypass moderation of incoming bug reports.

In root's crontab file ("crontab -e" as root):

 @reboot /var/rt2/bin/rtmilter.pl /var/spool/postfix/private/milter

Run the command by hand (backgrounded) to start the milter process before the next reboot.

Run "newaliases" and "postfix reload" to pick up the changed configuration.

Apache httpd configuration

Create /etc/apache2/ssl.crt and /etc/apache2/ssl.key.

Copy /etc/apache2/ssl.key/server.key and /etc/apache2/ssl.crt/server.crt from the old server, or follow the instructions at http://kb.mit.edu/confluence/display/istcontrib/Obtaining+an+SSL+certificate+for+a+web+server to obtain a new one. server.key and server.crt may be symlinks using whatever scheme seems convenient for renewing certificates every few years.

Install /etc/apache2/ssl.crt/chain.crt from /mit/apache-ssl/certificates/InCommon-chain.crt.txt (requires tokens). Cutting and pasting is effective for transferring certificates as they are represented as short text files.

Install /etc/apache2/ssl.crt/clientCA.crt from /mit/apache-ssl/certificates/mitCAclient.pem (requires tokens).

Install the RT site file as /etc/apache2/sites-available/rt.conf . (Copy from the old server; this could probably be put into the krbdev-services repository.)

Edit /etc/apache2/mods-enabled/fastcgi.conf and uncomment the FastCgiWrapper line.

Edit /etc/apache2/mods-available/proxy.conf and set:

 ProxyVia On
 ProxyPass /buildbot/ http://krbdev-buildbot.mit.edu:8010/
 <Proxy http://krbdev-buildbot.mit.edu:8010/*>
         Allow from all

Clean out /var/www and install index.html and robots.txt from the krbdev-www directory of the krbdev-services repository. (TBD: index.html needs to be updated not to expect buildbot on the same server.)


 a2enmod ssl
 a2enmod userdir
 a2enmod rewrite
 a2enmod proxy_http
 a2dissite 000-default
 a2ensite rt
 service apache2 restart
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