Difference between revisions of "Solaris Build Environment"

Revision as of 11:18, 16 December 2016

This page contains notes on the setup of a Solaris buildbot worker for MIT krb5.

Our current Solaris build hardware is a Sun Fire V240 running Solaris 10 U10.

Solaris 10 includes a variety of free software tools in /usr/sfw, but not the full set of dependencies needed to checkout, build, and test the krb5 tree. We have chosen to use OpenCSW to add most of the dependencies, and local builds in /usr/local for the remaining few.

Set up a useful shell

A root login by default uses a very minimal shell (/bin/sh) with a very minimal path (/usr/sbin:/usr/bin). For any operations performed as root, we begin by starting a functional shell as follows:

   bash
   export PATH=/opt/csw/bin:/usr/sbin:/usr/bin:/usr/sfw/bin:/usr/ccs/bin
   export MANPATH=/opt/csw/share/man:/usr/share/man:/usr/sfw/share/man

For now, we are not modifying /etc/passwd or root's dotfiles to make this happen automatically.

Set up OpenCSW

Installing the pkgutil command (it will be placed in /opt/csw/bin) and update its catalog as follows:

   pkgadd -d http://get.opencsw.org/now
   pkgutil -U
   edit /etc/passwd and change the home directory of "games" to /

"pkgutil -l" lists installed packages. "pkgutil -a string" looks up string in the catalog. "pkgutil -i packagename" installs a package; the -y flag can be used to skip prompts. "pkgutil -U" followed by "pkgutil -yu" updates all installed packages.

OpenCSW appears to create a "games" account with the home directory set to /opt/csw. This would ordinarily allow ssh access by the Kerberos principal games@ATHENA.MIT.EDU. We change the home directory of this account to / so that /.k5login governs access.

Install required OpenCSW packages

   pkgutil -y -i git
   pkgutil -y -i libssl_dev
   mkdir /opt/csw/sbin/sparcv9  # to work around an apparent bug in openldap package
   pkgutil -y -i openldap
   pkgutil -y -i openldap_back_bdb
   pkgutil -y -i openldap_client
   pkgutil -y -i openldap_dev
   pkgutil -y -i autoconf
   pkgutil -y -i tcl_dev
   pkgutil -y -i expect
   pkgutil -y -i bison
   pkgutil -y -i python27
   pkgutil -y -i buildbot_slave
   pkgutil -y -i emacs
   pkgutil -y -i gdb

We have decided not to support the Solaris 10 native LDAP library and tools (Solaris 11 ships with OpenLDAP and Solaris 12 will make it the default), so we install OpenLDAP from OpenCSW. OpenSSL 0.9 is present in /usr/sfw/lib, but we need 1.0 or later for PKINIT so we install the OpenCSW version. The bison in /usr/sfw/bin is also too old for our x-deltat.y file. buildbot_slave requires Python 2.7 but does not list it as a formal dependency. emacs and gdb are not needed to build krb5, but are handy to have around for manual testing and debugging work.

buildbot 0.9 changes its terminology to refer to "workers" rather than "slaves". At the time of this writing, OpenCSW only includes buildbot 0.8.4; when it switches to buildbot 0.9, the package we need will likely change to buildbot_worker.

Local builds of remaining dependencies

dejagnu is not present in OpenCSW, so we need to build it ourselves:

   mkdir /usr/local /usr/local/src
   From https://ftp.gnu.org/gnu/dejagnu/ fetch the latest dejagnu; untar it in /usr/local/src
   chown -R root /usr/local/src/dejagnu-version
   cd /usr/local/src/dejagnu-version
   ./configure && gmake install

Set up buildbot

Create and switch to the buildbot account:

   useradd -d /var/lib/buildbot -u 101 -s /bin/bash -m buildbot
   su - buildbot
   touch .k5login
   edit .profile and add:
     PATH=/usr/local/bin:/opt/csw/bin:/usr/bin:/usr/sfw/bin:/usr/ccs/bin
     MANPATH=/usr/local/share/man:/opt/csw/share/man:/usr/share/man:/usr/sfw/share/man
     export PATH MANPATH

Principals may be added to .k5login, but make sure it exists so that the Kerberos principal "buildbot" does not have access to the account.

Set up ssh for the ssh tunnel to krbdev.mit.edu:

   mkdir .ssh
   ssh-keygen -q -N  -f .ssh/id_rsa -t rsa
   cat .ssh/id_rsa.pub
   In a separate shell, log into krbdev.mit.edu, "su -s /bin/bash - buildbot" and add the contents of id_rsa.pub to .ssh/authorized_keys
   Edit .ssh/known_hosts (new file) and add:
     krbdev.mit.edu,18.9.62.43 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAmV2SWbD5nZah7F0nhzEpBtmdiNa38TTDx58i/HhENlT3yV4xpwyHcqBSObUR+wQlW+LfBRgyGeXEZAoiEMG4kQk93P+JKEsK5G/X9QF2LICsoMSZKW31S1K4axqtlhesFnnlXzZZkWQhYhG3He8DXBBw+2AMWR6jfTnM634fGpl5Vo76r7QuxL09RpnSEZyihR/6n8IG8EaAyX4Rbj23pkLlj6DjfWoYd1CmjN+JKiZ9q/yXHQMW+/yMo+JhmAPwgBVjQkc/pDfVFffavWzRPJ39ZUbRRNBSHU0lweXLcCIq6K4P+Mvt/WKwsFNxASNOOmkbWVDfNflT8L1maFCr7w==

Create the slave directory:

   buildslave create-slave /var/lib/buildbot/slaves/s01 127.0.0.1:9989 s01 password

where password should match the entry for s01 in slaves.py on krbdev.mit.edu.

As root, create /etc/init.d/buildslave with the contents:

   #!/sbin/sh
   case "$1" in
   start)
       su buildbot -c 'ssh -l buildbot -N -L9989:127.0.0.1:9989 krbdev.mit.edu &'
       su - buildbot -c 'buildslave start --quiet /var/lib/buildbot/slaves/s01'
       ;;
   stop)
       su buildbot -c '/opt/csw/bin/buildslave stop --quiet /var/lib/buildbot/slaves/s01'
       ;;
   esac
   exit 0

Make it executable with "chmod u+x /etc/init.d/buildslave". Create the following links:

   ln -s /etc/init.d/buildslave /etc/rc2.d/S99buildslave
   ln -s /etc/init.d/buildslave /etc/rc2.d/K00buildslave

We do not currently stop the ssh tunnel automatically, because it isn't easy to do. The ssh tunnel must be manually restarted if it breaks; on other workers, we use a cron job which runs "ssh -oExitOnForwardFailure=yes ...", but the Solaris 10 ssh does not support that option. The start rule will display an unwanted copy of /etc/motd; an alternative would be to explicitly set the path when running buildbot, instead of relying on buildbot's .profile.

Create user accounts

By default, /home on Solaris is controlled by the automounter. To avoid needing to change the automounter configuration, we create user accounts with home directories in /export/home. For example:

   useradd -u 3622 -d /export/home/ghudson -s /bin/bash -m ghudson

Creating an account allows the Kerberos principal of the same name in the ATHENA.MIT.EDU realm to log in on that account. Matching the local UID to the Moira UID may be unnecessary as long as we do not make use of remote filesystems on this machine.

To set a reasonable path for development work, the user can edit .profile to add:

   PATH=/usr/local/bin:/opt/csw/bin:/usr/bin:/usr/sfw/bin:/usr/ccs/bin
   MANPATH=/usr/local/share/man:/opt/csw/share/man:/usr/share/man:/usr/sfw/share/man
   export PATH MANPATH

The following shell function, or a variant of it, may be useful for configuring a build with the correct paths. This variant is designed to work in a separate build directory placed next to the src directory within a checkout.

   k5configure() { ../src/configure --enable-maintainer-mode --prefix=$HOME/inst --with-ldap CFLAGS=-g CPPFLAGS="-I/opt/csw/include" LDFLAGS="-L/opt/csw/lib -R/opt/csw/lib" "$@"; }

To do

• t_kdb.py does not know how to find the OpenCSW slapd. Making a copy of /opt/csw/libexec/slapd won't work, because it is a script which chooses an executable based on the architecture and the path to the script.

• We should install the SunPro compiler and do automated builds with that compiler as well as gcc.