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| Line 12: |
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| * '''Time Zone''': EST5EDT | | * '''Time Zone''': EST5EDT |
| * '''Location''': Cambridge, MA | | * '''Location''': Cambridge, MA |
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| == SELinux and virtualization ==
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| A lot of people I know turn SELinux off in order to get virtualization working. Not cool. If you're having problems, these are the minor tweaks I made to SELinux on my F17 system to get things running smoothly. These notes are copied from my workstation runlogs, so excuse the brevity. Hopefully I didn't accidentally leave anything out since I worked pretty quickly. Of course, these notes come with the standard warning of, "It's likely I've done something correct-but-badly and/or inefficiently, so follow these at your own risk."
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|
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| * selinux tools; probably don't need all of these, but I like them there
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| <code>yum install policycoreutils policycoreutils-newrole policycoreutils-restorecond setools setools-console policycoreutils</code>
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|
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| * by default I make /var about 08GB; unfortunately, libvirt stores images in here, so space quickly becomes an issue for me; no matter, just move things elsewhere..../scratch is just a partition I've carved out for miscellaneous storage--perfect, for my needs here, in other words.
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| <pre>
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| cd /var/lib
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| mv -f libvirt/ /scratch/
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| ln -s /scratch/libvirt/ .
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| #
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| # now fix the selinux fcontext for that dir
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| restorecon -R -F /scratch/libvirt
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| semanage fcontext -S targeted -a -t var_image_t "/scratch/libvirt(/.*)?"
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| semanage fcontext -S targeted -a -t var_image_t "/var/lib/libvirt(/.*)?"
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| restorecon -vv -F /scratch/libvirt
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| restorecon -vv -F /var/lib/libvirt
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| </pre>
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|
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| * change selinux user mapping for my user created at install time
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| <code>semanage login -a -s staff_u sbueno</code>
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|
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| * change the default selinux user mapping for future new users (don't want any unconfined_u's running around....)
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| <code>semanage login -m -S targeted -s "user_u" -r s0 __default__</code>
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|
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| * time to fulfil virtualization needs
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| <code>yum install qemu-kvm libvirt-daemon-kvm qemu-kvm-tools virt-manager x3270-x11 tigervnc</code>
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|
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| * fix some booleans since virtualization is a cluster of AVCs by default
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| <pre>
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| # HINT: you can do this via setsebool -P also, but you can only change one
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| # boolean at a time that way, meaning the policy will need to be recompiled
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| # for every single boolean you want to flip; do it this way and only recompile
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| # the policy once
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| semanage -S targeted -i - << EOF
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| boolean -m --on staff_use_svirt
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| boolean -m --on virt_use_execmem
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| boolean -m --on virt_use_nfs
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| boolean -m --on virt_use_sysfs
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| boolean -m --on virt_use_usb
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| boolean -m --on virt_use_xserver
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| EOF
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| </pre>
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|
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| * If your SELinux user mapping changed (ex. from user_u to staff_u), you probably want to log out and back in again. Aside from that, you should be good to go.
| |
About me
I'm a part of the Anaconda team at Red Hat. Specifically, my work tends to focus on support for secondary architectures (s390x, PowerPC) and text UI.
Prior to coming to Red Hat, I was a Linux sysadmin at an engineering school. My work there involved service migration/consolidation, automating and customizing kickstart installs, packaging custom RPMs and learning an awful lot about package management, making various tweaks to the security policy, and a small amount of identity management.
Non-work interests of mine include SELinux, modular origami, writing, breakfast, and Star Trek.
Contact
- Email: sbueno at redhat dot com
- IRC: sbueno on freenode
- Fedora Account: sbueno
- Time Zone: EST5EDT
- Location: Cambridge, MA
