edd6048168
We are trying to get a working 64bit qemu cpu model in the gate for nova live migration testing. It appears that we need to make this change prior to nova starting. Make the change in configure_libvirt() to handle this along with the other libvirt config updates. This allows us to restart the libvirt service once. This function calls a python tool which parses and updates the XML if necessary. Change-Id: I00667713bfba67ab8cedbcb1660ff94d4f4bcc07
134 lines
4.7 KiB
Bash
134 lines
4.7 KiB
Bash
#!/bin/bash
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#
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# lib/nova_plugins/functions-libvirt
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# Common libvirt configuration functions
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# Dependencies:
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# ``functions`` file
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# ``STACK_USER`` has to be defined
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# Save trace setting
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LV_XTRACE=$(set +o | grep xtrace)
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set +o xtrace
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# Defaults
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# --------
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# if we should turn on massive libvirt debugging
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DEBUG_LIBVIRT=$(trueorfalse False DEBUG_LIBVIRT)
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# Installs required distro-specific libvirt packages.
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function install_libvirt {
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if is_ubuntu; then
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install_package qemu-kvm
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install_package libvirt-bin
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install_package python-libvirt
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install_package python-guestfs
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elif is_fedora || is_suse; then
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install_package kvm
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install_package libvirt
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install_package libvirt-python
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install_package python-libguestfs
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fi
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# Restart firewalld after install of libvirt to avoid a problem
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# with polkit, which libvirtd brings in. See
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# https://bugzilla.redhat.com/show_bug.cgi?id=1099031
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# Note there is a difference between F20 rackspace cloud images
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# and HP images used in the gate; rackspace has firewalld but hp
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# cloud doesn't.
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if is_fedora && is_package_installed firewalld; then
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sudo service firewalld restart || true
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fi
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}
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# Configures the installed libvirt system so that is accessible by
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# STACK_USER via qemu:///system with management capabilities.
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function configure_libvirt {
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if is_service_enabled neutron && is_neutron_ovs_base_plugin && ! sudo grep -q '^cgroup_device_acl' $QEMU_CONF; then
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# Add /dev/net/tun to cgroup_device_acls, needed for type=ethernet interfaces
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cat <<EOF | sudo tee -a $QEMU_CONF
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cgroup_device_acl = [
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"/dev/null", "/dev/full", "/dev/zero",
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"/dev/random", "/dev/urandom",
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"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
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"/dev/rtc", "/dev/hpet","/dev/net/tun",
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]
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EOF
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fi
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# Since the release of Debian Wheezy the libvirt init script is libvirtd
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# and not libvirtd-bin anymore.
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if is_ubuntu && [ ! -f /etc/init.d/libvirtd ]; then
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LIBVIRT_DAEMON=libvirt-bin
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else
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LIBVIRT_DAEMON=libvirtd
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fi
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if is_fedora || is_suse; then
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# Starting with fedora 18 and opensuse-12.3 enable stack-user to
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# virsh -c qemu:///system by creating a policy-kit rule for
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# stack-user using the new Javascript syntax
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rules_dir=/etc/polkit-1/rules.d
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sudo mkdir -p $rules_dir
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cat <<EOF | sudo tee $rules_dir/50-libvirt-$STACK_USER.rules
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polkit.addRule(function(action, subject) {
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if (action.id == 'org.libvirt.unix.manage' &&
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subject.user == '$STACK_USER') {
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return polkit.Result.YES;
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}
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});
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EOF
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unset rules_dir
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fi
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# The user that nova runs as needs to be member of **libvirtd** group otherwise
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# nova-compute will be unable to use libvirt.
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if ! getent group $LIBVIRT_GROUP >/dev/null; then
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sudo groupadd $LIBVIRT_GROUP
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fi
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add_user_to_group $STACK_USER $LIBVIRT_GROUP
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# Enable server side traces for libvirtd
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if [[ "$DEBUG_LIBVIRT" = "True" ]] ; then
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if is_ubuntu; then
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# Unexpectedly binary package builds in ubuntu get fully qualified
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# source file paths, not relative paths. This screws with the matching
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# of '1:libvirt' making everything turn on. So use libvirt.c for now.
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# This will have to be re-visited when Ubuntu ships libvirt >= 1.2.3
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local log_filters="1:libvirt.c 1:qemu 1:conf 1:security 3:object 3:event 3:json 3:file 1:util"
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else
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local log_filters="1:libvirt 1:qemu 1:conf 1:security 3:object 3:event 3:json 3:file 1:util"
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fi
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local log_outputs="1:file:/var/log/libvirt/libvirtd.log"
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if ! grep -q "log_filters=\"$log_filters\"" /etc/libvirt/libvirtd.conf; then
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echo "log_filters=\"$log_filters\"" | sudo tee -a /etc/libvirt/libvirtd.conf
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fi
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if ! grep -q "log_outputs=\"$log_outputs\"" /etc/libvirt/libvirtd.conf; then
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echo "log_outputs=\"$log_outputs\"" | sudo tee -a /etc/libvirt/libvirtd.conf
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fi
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fi
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# Update the libvirt cpu map with a gate64 cpu model. This enables nova
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# live migration for 64bit guest OSes on heterogenous cloud "hardware".
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if [[ -f /usr/share/libvirt/cpu_map.xml ]] ; then
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sudo $TOP_DIR/tools/cpu_map_update.py /usr/share/libvirt/cpu_map.xml
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fi
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# libvirt detects various settings on startup, as we potentially changed
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# the system configuration (modules, filesystems), we need to restart
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# libvirt to detect those changes. Use a stop start as otherwise the new
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# cpu_map is not loaded properly on some systems (Ubuntu).
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stop_service $LIBVIRT_DAEMON
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start_service $LIBVIRT_DAEMON
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}
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# Restore xtrace
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$LV_XTRACE
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# Local variables:
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# mode: shell-script
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# End:
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