RPM/Mock

Mock Config Example

Remi Collet

As I have a new builder, I spend some time to optimize my configuration.

Mainly to use the space available in tpmfs (up to 6Gio), rather than some disk space (which is slow and noisy).

Before, mock launch the build using space (basedir) in /var/lib/mock (a stripped LV for me).

To free the build space used as soon as possible, I use the cleanup_on_success option. But this doesn't work because of a little bug in mock (#668222), until I find a simple workaround patch (which need to be improved).

I also use the createrepo_on_rpms option and configure the resultdir as a repository which will be used by next build. This is really useful, as this avoid to update my main repository (which is quite big, so quite long to update).

There is also another little bug in mock (#668278), which impose me to use the root account to clean the resultdir (I hope this will be fixed by upstream).

So, here is one of my mock configuration file (for fedora 14 x86_64) :

config_opts['root'] = 'fc14x'
config_opts['target_arch'] = 'x86_64'
config_opts['chroot_setup_cmd'] = 'groupinstall buildsys-build'
config_opts['dist'] = 'fc14'  # only useful for --resultdir variable subst

config_opts['plugin_conf']['ccache_enable'] = True
config_opts['plugin_conf']['ccache_opts']['max_cache_size'] = '1G'
config_opts['plugin_conf']['ccache_opts']['dir'] = "/dev/shm/ccache.fc14x/"

config_opts['basedir'] = '/dev/shm/'
config_opts['resultdir'] = "/var/lib/mock/fc14x"
config_opts['cleanup_on_success'] = True
config_opts['cleanup_on_failure'] = False

config_opts['createrepo_on_rpms'] = True
config_opts['createrepo_command'] = '/usr/bin/createrepo -d -q -x *.src.rpm'

config_opts['macros']['%_topdir']="/builddir/build"
config_opts['macros']['%_smp_mflags']="-j3"
config_opts['macros']['%vendor']="Remi Collet"
config_opts['macros']['%packager']="http://blog.famillecollet.com/"
config_opts['macros']['%dist']=".fc14.remi"
config_opts['macros']['%fedora']="14"
config_opts['macros']['%_with_ibase']="1"
config_opts['macros']['%_with_oci8']="1"
config_opts['macros']['%runselftest']="1"


config_opts['yum.conf'] = """
[main]
cachedir=/var/cache/yum
debuglevel=1
reposdir=/dev/null
logfile=/var/log/yum.log
retries=20
obsoletes=1
gpgcheck=0
assumeyes=1

# repositories

[fedora]
name=fedora
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-14&arch=x86_64

[updates-released]
name=updates
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f14&arch=x86_64
    
[remi]
name=remi public
baseurl=file:/home/rpmbuild/site/rpms/fedora/14/remi/x86_64/

[remi-priv]
name=remi prive
baseurl=file:/home/rpmbuild/site/rpms/priv/x86_64/

[result]
name=result
baseurl=file:/var/lib/mock/fc14x/

"""

I hopes it could help others, as it seems to work really well.

Here is an exemple :

$ mock --configdir=/var/lib/mock/etc -r fc14x rebuild php-phpunit-PHPUnit-3.5.7-1.remi.src.rpm 
INFO: mock.py version 1.1.7 starting...
State Changed: init plugins
INFO: selinux enabled
State Changed: start
INFO: Start(/home/extras/SRPMS/php-phpunit-PHPUnit-3.5.7-1.remi.src.rpm)  Config(fc14x)
State Changed: lock buildroot
State Changed: clean
State Changed: init
State Changed: lock buildroot
Mock Version: 1.1.7
INFO: Mock Version: 1.1.7
INFO: enabled root cache
State Changed: unpacking root cache
INFO: enabled yum cache
State Changed: cleaning yum metadata
INFO: enabled ccache
State Changed: running yum
State Changed: setup
State Changed: build
INFO: Done(/home/extras/SRPMS/php-phpunit-PHPUnit-3.5.7-1.remi.src.rpm) Config(fc14x) 0 minutes 13 seconds
INFO: Results and/or logs in: /var/lib/mock/fc14x
INFO: Cleaning up build root ('clean_on_success=True')
State Changed: lock buildroot
State Changed: clean
INFO: chroot (/dev/shm/fc14x) unlocked and deleted
INFO: Running createrepo on binary rpms in resultdir

Yes, only 13" :)

This is a small and simple package, rpmbuild take around 4", so I can say that mock overhead is only 9" with this configuration. Really acceptable. No reason to keep using rpmbuild and definitively prefer the sane build environment provided by mock.

Since Fedora 16, by default, /dev/shm is mount with (rw,nosuid,nodev,seclabel) options which are not compatible for this use.

You need to edit your fstab
tmpfs /dev/shm tmpfs size=12G 0 0
And then to switch to the new options
mount -o remount /dev/shm

And, it will be mount with (rw,relatime,seclabel,size=12582912k) which is ok.