1d378dcf6d
When configuring TLS between the console proxy (where the n-novnc service runs) and the compute host, some configuration for QEMU needs to be done on the compute host. The existing code for this requires the n-novnc service to be running, which it is in a single node all-in-one deployment. However, when running in a multinode deployment, the n-novnc service runs only on the controller and not on the subnode. Yet, we need to configure QEMU on the subnode compute host as well. This removes the n-novnc service requirement to enable TLS QEMU configuration to occur on a compute subnode in a multinode deployment. Closes-Bug: #1849418 Change-Id: I8b6970e91ad7f52ff489cb9f776ca216d8f86aa4
186 lines
6.4 KiB
Bash
186 lines
6.4 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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_XTRACE_NOVA_FN_LIBVIRT=$(set +o | grep xtrace)
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set +o xtrace
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# Defaults
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# --------
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# Turn on selective debug log filters for libvirt.
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# (NOTE: Enabling this by default, because the log filters enabled in
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# 'configure_libvirt' function further below are _selective_ and not
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# extremely verbose.)
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DEBUG_LIBVIRT=$(trueorfalse True DEBUG_LIBVIRT)
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# Try to enable coredumps for libvirt
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# Currently fairly specific to OpenStackCI hosts
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DEBUG_LIBVIRT_COREDUMPS=$(trueorfalse False DEBUG_LIBVIRT_COREDUMPS)
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# Only Xenial is left with libvirt-bin. Everywhere else is libvirtd
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if is_ubuntu && [ ${DISTRO} == "xenial" ]; then
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LIBVIRT_DAEMON=libvirt-bin
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else
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LIBVIRT_DAEMON=libvirtd
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fi
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# Enable coredumps for libvirt
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# Bug: https://bugs.launchpad.net/nova/+bug/1643911
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function _enable_coredump {
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local confdir=/etc/systemd/system/${LIBVIRT_DAEMON}.service.d
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local conffile=${confdir}/coredump.conf
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# Create a coredump directory, and instruct the kernel to save to
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# here
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sudo mkdir -p /var/core
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sudo chmod a+wrx /var/core
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echo '/var/core/core.%e.%p.%h.%t' | \
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sudo tee /proc/sys/kernel/core_pattern
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# Drop a config file to up the core ulimit
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sudo mkdir -p ${confdir}
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sudo tee ${conffile} <<EOF
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[Service]
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LimitCORE=infinity
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EOF
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# Tell systemd to reload the unit (service restarts later after
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# config anyway)
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sudo systemctl daemon-reload
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}
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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-system
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if [[ ${DISTRO} == "xenial" ]]; then
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install_package libvirt-bin libvirt-dev
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else
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install_package libvirt-clients libvirt-daemon-system libvirt-dev
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fi
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# uninstall in case the libvirt version changed
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pip_uninstall libvirt-python
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pip_install_gr libvirt-python
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#pip_install_gr <there-si-no-guestfs-in-pypi>
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elif is_fedora || is_suse; then
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# Note that in CentOS/RHEL this needs to come from the RDO
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# repositories (qemu-kvm-ev ... which provides this package)
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# as the base system version is too old. We should have
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# pre-installed these
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install_package qemu-kvm
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install_package libvirt libvirt-devel
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pip_uninstall libvirt-python
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pip_install_gr libvirt-python
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fi
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if [[ $DEBUG_LIBVIRT_COREDUMPS == True ]]; then
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_enable_coredump
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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 && ! 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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"/dev/vfio/vfio",
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]
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EOF
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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 1:cpu"
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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 1:cpu"
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fi
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local log_outputs="1:file:/var/log/libvirt/libvirtd.log"
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if ! sudo 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 ! sudo 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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if is_nova_console_proxy_compute_tls_enabled ; then
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echo "vnc_tls = 1" | sudo tee -a $QEMU_CONF
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echo "vnc_tls_x509_verify = 1" | sudo tee -a $QEMU_CONF
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sudo mkdir -p /etc/pki/libvirt-vnc
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deploy_int_CA /etc/pki/libvirt-vnc/ca-cert.pem
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deploy_int_cert /etc/pki/libvirt-vnc/server-cert.pem /etc/pki/libvirt-vnc/server-key.pem
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# OpenSSL 1.1.0 generates the key file with permissions: 600, by
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# default and the deploy_int* methods use 'sudo cp' to copy the
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# files, making them owned by root:root.
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# Change ownership of everything under /etc/pki/libvirt-vnc to
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# libvirt-qemu:libvirt-qemu so that libvirt-qemu can read the key
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# file.
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sudo chown -R libvirt-qemu:libvirt-qemu /etc/pki/libvirt-vnc
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fi
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# Service needs to be started on redhat/fedora -- do a restart for
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# sanity after fiddling the config.
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restart_service $LIBVIRT_DAEMON
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# Restart virtlogd companion service to ensure it is running properly
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# https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1577455
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# https://bugzilla.redhat.com/show_bug.cgi?id=1290357
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# (not all platforms have it; libvirt 1.3+ only, thus the ignore)
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restart_service virtlogd || true
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}
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# Restore xtrace
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$_XTRACE_NOVA_FN_LIBVIRT
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# Local variables:
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# mode: shell-script
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# End:
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