From: Frank Brehm <frank@brehm-online.com>
Date: Wed, 30 Dec 2015 17:02:22 +0000 (+0100)
Subject: saving uncommitted changes in /etc prior to emerge run
X-Git-Url: https://git.uhu-banane.de/?a=commitdiff_plain;h=33a7588b99fde3e64db66e63697271ff224993f2;p=config%2Fbruni%2Fetc.git

saving uncommitted changes in /etc prior to emerge run
---

diff --git a/conf.d/libvirt-guests b/conf.d/libvirt-guests
new file mode 100644
index 00000000..ed2ce580
--- /dev/null
+++ b/conf.d/libvirt-guests
@@ -0,0 +1,68 @@
+# /etc/conf.d/libvirtd
+
+# LIBVIRT_URIS
+# space separated list of libvirt URIs to communicate with to start/stop guests
+# Valid values are anything that can be passed to 'virsh connect'
+
+#LIBVIRT_URIS="qemu:///system"
+
+
+# LIBVIRT_SHUTDOWN
+# Valid options:
+# * managedsave - Performs a state save external to the VM (for hypervisors
+#                 supporting this operation). qemu-kvm will stop the CPU
+#                 and save off all state to a separate file. When the
+#                 machine is started again, it will resume like nothing
+#                 ever happened. This is guarenteed to always successfully
+#                 stop your machine and restart it.
+#
+# * shutdown -    Sends an ACPI shutdown (think of this as a request to
+#                 your guest to shutdown). There is no way to distinguish
+#                 between guests that are ignoring the shutdown request or
+#                 are stuck or are taking a long time to shutdown. We will
+#                 wait LIBVIRT_MAXWAIT seconds before yanking the power
+#                 out.
+#
+# * destroy  -    Immediately stop all running guests. Use with caution as
+#                 this can leave the guest in a corrupted state and might
+#                 lead to data loss.
+#
+
+#LIBVIRT_SHUTDOWN="managedsave"
+
+
+# LIBVIRT_MAXWAIT
+# Timeout in seconds until stopping a guest and "pulling the plug" on the
+# guest
+# Valid values are any integer over 0
+
+#LIBVIRT_MAXWAIT="500"
+
+
+# LIBVIRT_START
+# If this value is set to 'no', then guests and networks that were shutdown
+# by this script when it was stopped will not be started when it is started
+# back up.
+# Valid values are yes or no
+
+#LIBVIRT_START="yes"
+
+
+# LIBVIRT_IGNORE_AUTOSTART
+# If the VM is marked for autostart in its XML configuration then we won't
+# save its start when the init script is stopped. The result is that when
+# the init script starts back up, no attempt will be made to start the VM or
+# confirm it is started.
+# Valid values are yes or no
+
+#LIBVIRT_IGNORE_AUTOSTART="no"
+
+
+# LIBVIRT_NET_SHUTDOWN
+# If libvirtd created networks for you (e.g. NATed networks) then this init
+# script will shut them down for you if this is set to 'yes'. Otherwise,
+# the networks will be left running. For this option to be useful you must
+# have enabled the 'virt-network' USE flag and have had libvirt create a
+# NATed network for you. Valid values: 'yes' or 'no'
+
+#LIBVIRT_NET_SHUTDOWN="yes"
diff --git a/conf.d/libvirtd b/conf.d/libvirtd
index 48ab1252..c326531d 100644
--- a/conf.d/libvirtd
+++ b/conf.d/libvirtd
@@ -6,38 +6,13 @@
 # for libvirtd, you may override this. Or if you only use libvirtd locally.
 rc_need="net"
 
+# The termination timeout (start-stop-daemon parameter "retry") ensures
+# that the service will be terminated within a given time (25 + 5 seconds
+# per default) when you are stopping the service.
+#LIBVIRTD_TERMTIMEOUT="TERM/25/KILL/5"
+
 # LIBVIRTD_OPTS
 # You may want to add '--listen' to have libvirtd listen for tcp/ip connections
 # if you want to use libvirt for remote control
 # Please consult 'libvirtd --help' for more options
 #LIBVIRTD_OPTS="--listen"
-
-# LIBVIRTD_KVM_SHUTDOWN
-# Valid options:
-# * shutdown - Sends an ACPI shutdown (think when you tap the power button
-# 				on your machine and it begins a graceful shutdown). If your
-# 				VM ignores this, it will have the power yanked out from under
-# 				it in LIBVIRTD_KVM_SHUTDOWN_MAXWAIT seconds.
-# * managedsave - Performs a state save external to the VM. qemu-kvm will stop
-# 				stop the CPU and save off all state to a separate file. When
-# 				the machine is started again, it will resume like nothing ever
-# 				happened. This is guarenteed to always successfully stop your
-# 				machine and restart it. However it may take some time to finish.
-# * none - No attempts will be made to stop any VMs. If you are restarting your
-# 		machine the qemu-kvm process will be simply killed, which may result
-# 		in your VMs having disk corruption.
-LIBVIRTD_KVM_SHUTDOWN="managedsave"
-
-# LIBVIRTD_KVM_SHUTDOWN_MAXWAIT
-# Timeout in seconds until stopping libvirtd and "pulling the plug" on the
-# remaining VM's still in a running state
-#LIBVIRTD_KVM_SHUTDOWN_MAXWAIT="500"
-
-# LIBVIRTD_KVM_NET_SHUTDOWN
-# If libvirtd created networks for you (e.g. NATed networks) then this init
-# script will shut them down for you if this is set to 'yes'. Otherwise,
-# the networks will be left running once libvirt is shutdown. For this
-# option to be useful you must have enabled the 'virt-network' USE flag and
-# have had libvirt create a NATed network for you.
-# Valid values: 'yes' or 'no'
-#LIBVIRTD_KVM_NET_SHUTDOWN="yes"
diff --git a/init.d/libvirt-guests b/init.d/libvirt-guests
new file mode 100755
index 00000000..a8d65f89
--- /dev/null
+++ b/init.d/libvirt-guests
@@ -0,0 +1,235 @@
+#!/sbin/runscript
+
+description="Virtual Machine Management (libvirt) Guests"
+
+depend() {
+	need libvirtd
+}
+
+# set the default to QEMU
+[ -z "${LIBVIRT_URIS}" ] && LIBVIRT_URIS="qemu:///system"
+
+# default to suspending the VM via managedsave
+case "${LIBVIRT_SHUTDOWN}" in
+	managedsave|shutdown|destroy) ;;
+	*) LIBVIRT_SHUTDOWN="managedsave" ;;
+esac
+
+# default to 500 seconds
+[ -z ${LIBVIRT_MAXWAIT} ] && LIBVIRT_MAXWAIT=500
+
+gueststatefile="/var/lib/libvirt/libvirt-guests.state"
+netstatefile="/var/lib/libvirt/libvirt-net.state"
+
+do_virsh() {
+	local hvuri=$1
+	shift
+
+	# if unset, default to qemu
+	[ -z ${hvuri} ] && hvuri="qemu:///system"
+	# if only qemu was supplied then correct the value
+	[ "xqemu" = x${hvuri} ] && hvuri="qemu:///system"
+
+	# Silence errors because virsh always throws an error about
+	# not finding the hypervisor version when connecting to libvirtd
+	# lastly strip the blank line at the end
+	LC_ALL=C virsh -c ${hvuri} "$@" 2>/dev/null | head -n -1
+}
+
+libvirtd_dom_list() {
+	# Only work with domains by their UUIDs
+	local hvuri=$1
+	shift
+
+	do_virsh "${hvuri}" list --uuid $@
+}
+
+libvirtd_dom_count() {
+	local hvuri=$1
+	shift
+
+	libvirtd_dom_list "${hvuri}" $@ | wc -l
+}
+
+libvirtd_net_list() {
+	# Only work with networks by their UUIDs
+	local hvuri=$1
+	shift
+
+	do_virsh "${hvuri}" net-list --uuid $@
+}
+
+libvirtd_net_count() {
+	local hvuri=$1
+	shift
+
+	libvirtd_net_list "${hvuri}" $@ | wc -l
+}
+
+libvirtd_dom_stop() {
+	# stops all persistent or transient domains for a given URI
+	# $1 - uri
+	# $2 - persisent/transient
+
+	local uri=$1
+	local persist=$2
+	local shutdown_type=${LIBVIRT_SHUTDOWN}
+	local counter=${LIBVIRT_MAXWAIT}
+	local dom_name=
+	local dom_as=
+	local dom_ids=
+	local uuid=
+	local dom_count=
+
+	[ "${persist}" = "--transient" ] && shutdown_type="shutdown"
+	[ -n "${counter}" ] || counter=500
+
+	einfo " Shutting down domain(s) ..."
+
+	# grab all persistent or transient domains running
+	dom_ids=$(libvirtd_dom_list ${uri} ${persist})
+
+	for uuid in ${dom_ids}; do
+		# Get the name
+		dom_name=$(do_virsh ${uri} domname ${uuid})
+		einfo "  ${dom_name}"
+		# Get autostart state
+		dom_as=$(do_virsh ${uri} dominfo ${uuid} | \
+			awk '$1 == "Autostart:" { print $2 }')
+
+		if [ "${persist}" = "--persistent" ]; then
+			# Save our running state only if LIBVIRT_IGNORE_AUTOSTART != yes
+			if  [ "x${LIBVIRT_IGNORE_AUTOSTART}" = "xyes" ] && \
+				[ ${dom_as} = "enabled" ]; then
+				:
+			else
+				echo "${uri} ${uuid}" >> ${gueststatefile}
+			fi
+
+		fi
+
+		# Now let's stop it
+		do_virsh "${uri}" ${shutdown_type} ${uuid} > /dev/null
+
+	done
+
+	dom_count="$(libvirtd_dom_count ${uri} ${persist})"
+	while [ ${dom_count} -gt 0 ] && [ ${counter} -gt 0 ] ; do
+		dom_count="$(libvirtd_dom_count ${uri} ${persist})"
+		sleep 1
+		if [ "${shutdown_type}" = "shutdown" ]; then
+			counter=$((${counter} - 1))
+		fi
+		echo -n "."
+	done
+
+	if [ "${shutdown_type}" = "shutdown" ]; then
+		# grab all domains still running
+		dom_ids=$(libvirtd_dom_list ${uri} ${persist})
+		for uuid in ${dom_ids}; do
+			dom_name=$(do_virsh ${uri} domname ${uuid})
+			eerror "  ${dom_name} forcibly stopped"
+			do_virsh "${uri}" destroy ${uuid} > /dev/null
+		done
+	fi
+}
+
+libvirtd_net_stop() {
+	# stops all persistent or transient domains for a given URI
+	# $1 - uri
+	# $2 - persisent/transient
+
+	local uri=$1
+	local persist=$2
+	local uuid=
+	local net_name=
+
+	if [ "${LIBVIRT_NET_SHUTDOWN}" != "no" ]; then
+
+		einfo " Shutting down network(s):"
+		for uuid in $(libvirtd_net_list ${uri} ${persist}); do
+			net_name=$(do_virsh ${uri} net-name ${uuid})
+			einfo "   ${net_name}"
+
+			if [ "${persist}" = "--persistent" ]; then
+				# Save our running state
+				echo "${uri} ${uuid}" >> ${netstatefile}
+
+			fi
+
+			# Actually stop the network
+			do_virsh qemu net-destroy ${uuid} > /dev/null
+		done
+
+	fi
+}
+
+start() {
+	local uri=
+	local uuid=
+	local name=
+
+	for uri in ${LIBVIRT_URIS}; do
+		do_virsh "${uri}" connect
+		if [ $? -ne 0 ]; then
+			eerror "Failed to connect to '${uri}'. Domains may not start."
+		fi
+	done
+
+	[ ! -e "${netstatefile}" ] && touch "${netstatefile}"
+	[ ! -e "${gueststatefile}" ] && touch "${gueststatefile}"
+
+	# if the user didn't want to start any guests up then respect their wish
+	[ "x${LIBVIRT_START}" = "xno" ] && return 0
+
+	# start networks
+	ebegin "Starting libvirt networks"
+	while read -r uri uuid
+	do
+		# ignore trash
+		[ -z "${uri}" ] || [ -z "${uuid}" ] && continue
+
+		name=$(do_virsh "${uri}" net-name ${uuid})
+		einfo "  ${name}"
+		do_virsh "${uri}" net-start ${uuid} > /dev/null
+	done <"${netstatefile}"
+	eend 0
+
+	# start domains
+	ebegin "Starting libvirt domains"
+	while read -r uri uuid
+	do
+		# ignore trash
+		[ -z "${uri}" ] || [ -z "${uuid}" ] && continue
+
+		name=$(do_virsh "${uri}" domname ${uuid})
+		einfo "  ${name}"
+		do_virsh "${uri}" start ${uuid} > /dev/null
+	done <"${gueststatefile}"
+	eend 0
+}
+
+stop() {
+	local counter=
+	local dom_name=
+	local net_name=
+	local dom_ids=
+	local uuid=
+	local dom_count=
+
+	rm -f "${gueststatefile}"
+	[ $? -ne 0 ] && eerror "Unable to save domain state"
+	rm -f "${netstatefile}"
+	[ $? -ne 0 ] && eerror "Unable to save net state"
+
+	for uri in ${LIBVIRT_URIS}; do
+		einfo "Stopping libvirt domains and networks for ${uri}"
+
+		libvirtd_dom_stop "${uri}" "--persistent"
+		libvirtd_dom_stop "${uri}" "--transient"
+		libvirtd_net_stop "${uri}" "--persistent"
+		libvirtd_net_stop "${uri}" "--transient"
+
+		einfo "Done stopping domains and networks for ${uri}"
+	done
+}
diff --git a/init.d/libvirtd b/init.d/libvirtd
index 99e82585..97184e36 100755
--- a/init.d/libvirtd
+++ b/init.d/libvirtd
@@ -1,139 +1,38 @@
 #!/sbin/runscript
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
 
 description="Virtual Machine Management daemon (libvirt)"
-extra_started_commands="reload halt"
-description_halt="Stops the libvirt daemon without stopping your VMs"
-description_reload="Restarts the libvirt daemon without stopping your VMs"
-
-depend() {
-    
-    use avahi-daemon   dbus virtlockd
-    after ntp-client ntpd nfs nfsmount portmap rpc.statd iptables ip6tables ebtables corosync sanlock cgconfig xenconsoled
-}
-
-libvirtd_virsh() {
-    local mode=$1
-    shift
-
-    # Silence errors because virsh always throws an error about
-    # not finding the hypervisor version when connecting to libvirtd
-    LC_ALL=C virsh -c ${mode}:///system "$@" 2>/dev/null
-}
-
-libvirtd_dom_list() {
-    # Make sure that it wouldn't be confused if the domain name
-    # contains the word running.
-    libvirtd_virsh $1 list | awk '$3 == "running" { print $1 }'
-}
-
-libvirtd_dom_count() {
-    # Make sure that it wouldn't be confused if the domain name
-    # contains the word running.
-    libvirtd_virsh $1 list | awk 'BEGIN { count = 0 } \
-        $3 == "running" { count++ } \
-        END { print count }'
-}
-
-libvirtd_net_list() {
-    # The purpose of the awk is to avoid networks with 'active' in the name
-    libvirtd_virsh $1 net-list | awk '$2 == "active" { print $1 }'
-}
-
-libvirtd_net_count() {
-    # The purpose of the awk is to avoid networks with 'active' in the name
-    libvirtd_virsh $1 net-list | awk 'BEGIN { count = 0 } \
-        $2 == "active" { count++ } \
-        END { print count }'
-}
 
+LIBVIRTD_OPTS=${LIBVIRTD_OPTS:-"${LIBVIRTD_OPTS}"}
+LIBVIRTD_TIMEOUT=${LIBVIRTD_TERMTIMEOUT:-"TERM/25/KILL/5"}
 
-start() {
-    # Test configuration directories in /etc/libvirt/ to be either not
-    # present or a directory, i.e. not a regular file, bug #532892
-    for dir in lxc nwfilter qemu storage; do
-      if [ -f /etc/libvirt/$dir ]; then
-        eerror "/etc/libvirt/$dir was created as a regular file. It must be either"
-        eerror "a directory or not present for libvirtd to start up successfully."
-        return 1
-      fi
-    done
-
-    ebegin "Starting libvirtd"
-    start-stop-daemon --start \
-        --env KRB5_KTNAME=/etc/libvirt/krb5.tab \
-        --exec /usr/sbin/libvirtd -- -d ${LIBVIRTD_OPTS}
-    eend $?
-}
+command="/usr/sbin/libvirtd"
+command_args="-d ${LIBVIRTD_OPTS}"
+start_stop_daemon_args="--env KRB5_KTNAME=/etc/libvirt/krb5.tab"
+pidfile="/var/run/libvirtd.pid"
+retry="${LIBVIRTD_TERMTIMEOUT}"
 
-stop() {
-    local counter=
-    local vm_name=
-    local net_name=
-    local dom_id=
-
-    ebegin "Stopping libvirtd"
-    # try to shutdown all (KVM/Qemu) domains
-    if [ "${LIBVIRTD_KVM_SHUTDOWN}" != "none" ] \
-        && [ "$(libvirtd_dom_count qemu)" != "0" ] ; then
-
-        einfo " Shutting down domain(s):"
-        for dom_id in $(libvirtd_dom_list qemu) ; do
-            vm_name="$(libvirtd_virsh qemu domname ${dom_id} | head -n 1)"
-            einfo "   ${vm_name}"
-            libvirtd_virsh qemu ${LIBVIRTD_KVM_SHUTDOWN} ${dom_id} > /dev/null
-        done
-
-        if [ -n "${LIBVIRTD_KVM_SHUTDOWN_MAXWAIT}" ] ; then
-            counter="${LIBVIRTD_KVM_SHUTDOWN_MAXWAIT}"
-        else
-            counter=500
-        fi
-
-        if [ "${LIBVIRTD_KVM_SHUTDOWN}" = "shutdown" ]; then
-            einfo " Waiting ${counter} seconds while domains shutdown ..."
-            DOM_COUNT="$(libvirtd_dom_count qemu)"
-            while [ ${DOM_COUNT} -gt 0 ] && [ ${counter} -gt 0 ] ; do
-                DOM_COUNT="$(libvirtd_dom_count qemu)"
-                sleep 1
-                counter=$((${counter} - 1))
-                echo -n "."
-            done
-        fi
-
-        if [ "$(libvirtd_dom_count qemu)" != "0" ] ; then
-            eerror " !!! Some guests are still running, stopping anyway"
-        fi
-
-    fi
-
-    if [ "${LIBVIRTD_KVM_NET_SHUTDOWN}" != "no" ] \
-        && [ "$(libvirtd_net_count qemu)" != "0" ]; then
-
-        einfo " Shutting down network(s):"
-        for net_name in $(libvirtd_net_list qemu); do
-            einfo "   ${net_name}"
-            libvirtd_virsh qemu net-destroy ${net_name} > /dev/null
-        done
-
-        if [ "$(libvirtd_net_count qemu)" != "0" ]; then
-            eerror " !!! Some networks are still active, stopping anyway"
-        fi
-    fi
-
-    # Now actually stop the daemon
-    start-stop-daemon --stop --quiet --exec \
-        /usr/sbin/libvirtd --pidfile=/var/run/libvirtd.pid
-    eend $?
-}
-
-halt() {
-    ebegin "Stopping libvirtd without shutting down your VMs"
-    start-stop-daemon --stop --quiet --exec \
-        /usr/sbin/libvirtd --pidfile=/var/run/libvirtd.pid
-    eend $?
-}
-
-reload() {
-    halt
-    start
+depend() {
+	
+	use avahi-daemon   dbus virtlockd
+	after ntp-client ntpd nfs nfsmount portmap rpc.statd iptables ip6tables ebtables corosync sanlock cgconfig xenconsoled
+}
+
+start_pre() {
+	# Test configuration directories in /etc/libvirt/ to be either not
+	# present or a directory, i.e. not a regular file, bug #532892
+	local has_errors=0
+	ebegin "Checking for suitable directories in \"/etc/libvirt\""
+
+	for dir in lxc nwfilter qemu storage; do
+		if [ -f /etc/libvirt/$dir ]; then
+			has_errors=1
+			eerror "/etc/libvirt/$dir was created as a regular file. It must be either"
+			eerror "a directory or not present for libvirtd to start up successfully."
+		fi
+	done
+
+	eend ${has_errors} "Please correct the error(s) above"
 }