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227 lines
6.7 KiB
Bash
227 lines
6.7 KiB
Bash
#!/bin/sh
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# Script to write information about the guest to XenStore.
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#
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# Information collected (if --memory NOT passed in):
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# - Distribution name
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# - Distribution version (major and minor)
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# - Kernel version (uname)
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# - IP address for each Ethernet interface
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#
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# Information collected (if --memory IS passed in):
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# - memtotal
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# - memfree
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#
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# Memory stats are separated out because they change all the time
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# and so we may not want to update them as frequently
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LANG="C"
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export LANG
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XE_LINUX_DISTRIBUTION_CACHE=/var/cache/xe-linux-distribution
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IPADDR_RE="\([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}"
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export PATH=/usr/sbin:/usr/bin:/sbin:/bin
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XENSTORE=${XENSTORE:-xenstore}
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XENSTORE_UPDATED=0
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# parse command line opts
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MEMORY_MODE=0 # do not update memory stats
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while [ $# -ge 1 ] ; do
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if [ "$1" = "--memory" ] ; then
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MEMORY_MODE=1 # update only memory stats
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fi
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shift
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done
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xenstore_write_cached() {
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key="$1" newval="$2"
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cache=/var/cache/xenstore/$key
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if [ -f $cache ] ; then
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# cache exists
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oldval=$(cat "$cache")
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if [ "$oldval" = "$newval" ] ; then
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# value unchanged
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return 0
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fi
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else
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# cache does not exist
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if [ -e $cache ] ; then
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# something (directory?) in its way
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rm -rf $cache
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fi
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fi
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# try to write and update cache if successfull
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if $XENSTORE-write "$key" "$newval" ; then
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mkdir -p $(dirname "$cache")
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echo -n "$newval" > "$cache"
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XENSTORE_UPDATED=1
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return 0
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fi
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return 1
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}
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# If we detect a domain change then delete our cache and force a refresh
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domid=$(xenstore-read "domid")
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cache=/var/cache/xenstore/unique-domain-id
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newval=$(xenstore-read "/local/domain/${domid}/unique-domain-id")
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if [ -e $cache ]; then
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oldval=$(cat "$cache")
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if [ "$oldval" != "$newval" ]; then
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# domain changed
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rm -rf /var/cache/xenstore
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fi
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fi
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mkdir -p $(dirname "$cache")
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echo -n "$newval" > "$cache"
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xenstore_rm_cached() {
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key="$1"
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cache=/var/cache/xenstore/$key
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if [ ! -e $cache ] ; then
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return 1
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fi
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# try to write and update cache if successfull
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if $XENSTORE-rm "$key" ; then
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rm -rf "$cache"
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XENSTORE_UPDATED=1
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return 0
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fi
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return 1
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}
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xenstore_list_interfaces_cached() {
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topdir=/var/cache/xenstore/attr
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if [ -d $topdir ] ; then
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cd $topdir
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for dir in * ; do
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[ -f $dir/ip ] && echo $dir
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done
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fi
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}
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if [ $MEMORY_MODE -eq 1 ] ; then
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# Update the memory information
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eval $(cat /proc/meminfo | \
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sed -n -e 's/MemTotal\: *\([0-9]*\)[^$]*/memtotal=\1/gp;' \
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-e 's/MemFree\: *\([0-9]*\)[^$]*/memfree=\1/gp;')
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xenstore_write_cached "data/meminfo_total" "${memtotal}"
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xenstore_write_cached "data/meminfo_free" "${memfree}"
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fi
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# e.g.
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# $ ip addr show
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# 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
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# link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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# inet 127.0.0.1/8 scope host lo
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# inet6 ::1/128 scope host
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# valid_lft forever preferred_lft forever
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# 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
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# link/ether 00:13:20:95:e8:74 brd ff:ff:ff:ff:ff:ff
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# inet 172.31.0.57/20 brd 172.31.15.255 scope global eth0
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# inet6 fe80::213:20ff:fe95:e874/64 scope link
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# valid_lft forever preferred_lft forever
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# 3: sit0: <NOARP> mtu 1480 qdisc noop
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# link/sit 0.0.0.0 brd 0.0.0.0
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#eval $(ip addr show | \
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# sed -n -e 's/^[[:digit:]]*: \([a-z0-9]*\): .*/ifs="\$ifs \1"; current="\1"; /gp;' \
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# -e 's/^[[:space:]]\{4\}inet \('${IPADDR_RE}'\)\/.*/eval inet_\${current}="\1"; /gp;')
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# e.g.
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# eth0 Link encap:Ethernet HWaddr 00:13:20:95:E8:74
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# inet addr:172.31.0.57 Bcast:172.31.15.255 Mask:255.255.240.0
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# inet6 addr: fe80::213:20ff:fe95:e874/64 Scope:Link
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# UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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# RX packets:98001128 errors:0 dropped:0 overruns:0 frame:0
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# TX packets:87728920 errors:0 dropped:0 overruns:0 carrier:0
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# collisions:0 txqueuelen:1000
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# RX bytes:35864034092 (33.4 GiB) TX bytes:27544025180 (25.6 GiB)
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# Interrupt:177
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#
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# lo Link encap:Local Loopback
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# inet addr:127.0.0.1 Mask:255.0.0.0
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# inet6 addr: ::1/128 Scope:Host
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# UP LOOPBACK RUNNING MTU:16436 Metric:1
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# RX packets:32928 errors:0 dropped:0 overruns:0 frame:0
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# TX packets:32928 errors:0 dropped:0 overruns:0 carrier:0
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# collisions:0 txqueuelen:0
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# RX bytes:3604609 (3.4 MiB) TX bytes:3604609 (3.4 MiB)
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eval $(/sbin/ifconfig | \
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sed -n -e '/^[0-9a-z][0-9a-z]*\:/,/^$/d' \
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-e 's/^\([0-9a-z][0-9a-z]*\) .*/ifs="\$ifs \1"; current="\1"; /gp;' \
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-e 's/ *inet addr:\('$IPADDR_RE'\) .*/eval inet_\${current}="\1"; /gp;')
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# network
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for if in $ifs ; do
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[ "${if}" = "lo" ] && continue
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inet=$(eval echo \${inet_${if}})
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[ -z "${inet}" ] && continue
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xenstore_write_cached "attr/${if}/ip" "${inet}"
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done
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# remove any interfaces that have been unplugged or downed
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for at in $(xenstore_list_interfaces_cached) ; do
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for if in $ifs ; do
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[ "${if}" = "${at}" ] && continue 2
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done
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xenstore_rm_cached "attr/${at}"
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done
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# distro
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if [ -f ${XE_LINUX_DISTRIBUTION_CACHE} ] ; then
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. ${XE_LINUX_DISTRIBUTION_CACHE}
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for key in os_name os_majorver os_minorver os_uname os_distro ; do
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new=$(eval echo \${${key}})
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[ -n "${new}" ] || continue
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xenstore_write_cached "data/${key}" "${new}"
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done
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fi
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# whether I support ballooning or not
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xenstore_write_cached "control/feature-balloon" "1"
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# whether I support ballooning or not
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xenstore_write_cached "control/feature-balloon" "1"
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# build time addons
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xenstore_write_cached "attr/PVAddons/MajorVersion" "5"
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xenstore_write_cached "attr/PVAddons/MinorVersion" "6"
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xenstore_write_cached "attr/PVAddons/MicroVersion" "0"
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xenstore_write_cached "attr/PVAddons/BuildVersion" "31188"
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xenstore_write_cached "attr/PVAddons/Installed" "1"
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# update xenstore if necc
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if [ $XENSTORE_UPDATED -eq 1 ] ; then
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xenstore_write_cached "data/updated" "$(date)"
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fi
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