1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
#!/bin/ash
# -----------------------------------------------------------------------------
# Copyright (c) 2007..2013 - RZ Uni FR
# Copyright (c) 2007..2013 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
# systemd-vmchooser_env
# - This is the preparation script for the configuration of the virtuali-
# zation tools used later on.
################################################################################
################################################################################
### Define default dirs / get configs
################################################################################
export PATH=$PATH:/opt/openslx/bin:/opt/openslx/sbin
# source config file with vars (e.g. ipaddr, macaddr, hostname)
. /opt/openslx/config
# from plugins/vmchooser/XX_vmchooser.sh
VMCHOOSER_DIR="/opt/openslx/vmchooser"
VMCHOOSER_CONF_DIR="$VMCHOOSER_DIR/config"
DHCP_NAT_CONF="/opt/openslx/vmchooser/config/udhcpd-nat1.conf"
mkdir -p "${VMCHOOSER_DIR}/data/loopimg"
mkdir -p "${VMCHOOSER_DIR}/fd-loop" -m 1777
# mount a clean tempfs (bug in UnionFS prevents loopmount to work)
grep -qE "unionfs |aufs " /proc/mounts && \
mount -n -o size=1500k -t tmpfs vm-loopimg "${VMCHOOSER_DIR}/data/loopimg"
# create an empty floppy image of 1.44 MByte size
dd "if=/dev/zero" "of=${VMCHOOSER_DIR}/data/loopimg/fd.img" count=2880 bs=512 2>/dev/null
chmod 0777 "${VMCHOOSER_DIR}/data/loopimg/fd.img"
# use dos formatter copied into stage3
mkdosfs "${VMCHOOSER_DIR}/data/loopimg/fd.img"
mount -n -t msdos -o loop,umask=000 "${VMCHOOSER_DIR}/data/loopimg/fd.img" "${VMCHOOSER_DIR}/fd-loop"
# setup more scratch space for virtual machines, if configured
mkdir -p /tmp/virt /var/log/samba /run/samba
chmod a+rwxt /tmp/virt
# enable normal users to setup the extended virtual machine redo file space
# and image source via network block device (NBD only at the moment)
# allow to start/stop samba on virtual devices (latter one ignores multiple
# independent daemons)
#cat >> /mnt/etc/sudoers << EOF
# allow to start and stop the special /tmp redo file space (RAM + NBD/NFS server RAID)
#ALL ALL=NOPASSWD: /sbin/losetup /dev/loop*
#ALL ALL=NOPASSWD: /sbin/mdadm -C /dev/md0 -l linear --raid-devices=2 /dev/loop* /dev/*
#ALL ALL=NOPASSWD: /opt/openslx/rootfs/usr/sbin/nbd-client * * /dev/nbd*
# allow to configure and start/stop samba services
#ALL ALL=NOPASSWD: /opt/openslx/rootfs/bin/sed -i /etc/*/smb.conf -e *
#ALL ALL=NOPASSWD: /usr/sbin/nmbd -s /etc/*/smb.conf
#ALL ALL=NOPASSWD: /usr/sbin/smbd -s /etc/*/smb.conf
#ALL ALL=NOPASSWD: /opt/openslx/rootfs/usr/bin/killall nmbd smbd
#EOF
################################################################################
### Determine hardware configuration
################################################################################
# estimate free mem
mem_free=$(grep -i "^memfree:" /proc/meminfo | awk '{print $2}')
mem_cached=$(grep -i "^cached:" /proc/meminfo | awk '{print $2}')
mem_swapcached=$(grep -i "^swapcached:" /proc/meminfo | awk '{print $2}')
[ -z "$mem_free" ] && mem_free="2048000"
[ -z "$mem_cached" ] && mem_cached="0"
[ -z "$mem_swapcached" ] && mem_swapcached="0"
totalmem="$(expr $(expr $mem_free + $mem_cached + $mem_swapcached) / 1024)"
echo "totalmem=${totalmem}" > "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# determine number of cpu cores
CPU_CORES=$(grep '^processor.*:' /proc/cpuinfo | wc -l)
if [ "${CPU_CORES}" -gt "1" 2>/dev/null ]; then
echo "cpu_cores=${CPU_CORES}" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
else
echo 'cpu_cores=1' >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
fi
# general machine architecture (32/64bit)
echo "host_arch=$(uname -m)" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# check for VT enabled CPU
if grep -q '^flags.*\<vmx\>' "/proc/cpuinfo"; then
echo "vtflag=1" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
echo 'kvm_module="kvm_intel"' >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
elif grep -q '^flags.*\<svm\>' "/proc/cpuinfo"; then
echo "vtflag=1" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
echo 'kvm_module="kvm_amd"' >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
else
echo "vtflag=0" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
fi
# write mac
if [ -n "$SLX_PXE_MAC" ]; then
hostmacaddr="${SLX_PXE_MAC}"
else ## Fallback:
hostmacaddr="$(ip a | grep ether | grep -o -E -i '([0-9a-f]{2}:){5}[0-9a-f]{2}' | head -n 1)"
fi
echo "hostmacaddr='$hostmacaddr'" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# TODO: We should only generate the suffix here (last 3 octets) as the first 3 are
# dependant on the virtualizer/emulator. Check if any run-virt.include still relies on
# $macguestpart/$macaddr. If so, fix it to use its specific first 3 bytes
# and append $macaddrssuffix
macaddrprefix='00:50:56'
macaddrsuffix="$(echo "$hostmacaddr" | awk -F ":" '{print "%VMID%:" $(NF-1) ":" $NF}' | tr '[a-z]' '[A-Z]')"
echo "macaddrprefix='$macaddrprefix'" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
echo "macaddrsuffix='$macaddrsuffix'" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# read in ip address
echo "hostip=${SLX_PXE_CLIENT_IP}" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# hostname
echo "hostname=\"$(hostname -s)\"" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
# get further hw information and check for traces of available optical and floppy drives
j=0
for cdrom in $(dmesg|grep -i "Attached scsi CD-ROM sr" | sed "s,.*Attached scsi CD-ROM ,,"); do
echo "cdrom_$j=/dev/${cdrom}" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
j=$(expr $j + 1)
done
j=0
for floppy in $(dmesg|grep -i "Floppy drive"|sed "s,.*(s): ,,;s, is .*,,"); do
echo "floppy_$j=/dev/${floppy}" >> "${VMCHOOSER_CONF_DIR}/virtualization.conf"
j=$(expr $j + 1)
done
################################################################################
### Setup VM networking
################################################################################
# there will be three types of network interfaces for virtual machines available
# all will be configured for every type of virtualization tool
# a) br0 is the direct host bridge into the local LAN (br0 already exists)
# vmnet0 for VMware
# vboxnet0 for VirtualBox
# kvmnet0* for Qemu/KVM
# b) nat1 is an internal bridge which "NATes" into the local LAN (with DHCP)
# vmnet1 for VMware
# vboxnet1 for VirtualBox
# kvmnet1* for Qemu/KVM
# c) vsw2 is an internal host bridge to connect software defined LANs to
# vmnet2 for VMware
# vboxnet2 for VirtualBox
# kvmnet2* for Qemu/KVM
# creating and configuring nat0
# 192.168.101.0/24 is vm nat. If you ever change this there are a couple of other files
# where you'd need to make changes, so think twice before doing so. ;)
brctl addbr nat1
ip link set dev nat1 up
ip addr add 192.168.101.1/24 dev nat1
echo "1" >/proc/sys/net/ipv4/conf/nat1/forwarding
echo "1" >/proc/sys/net/ipv4/conf/br0/forwarding 2>/dev/null
# iptables masquerade rule is now inserted by /opt/openslx/iptables/rules.d/50-virt-nat1-masquerading
### iptables -t nat -A POSTROUTING -o br0 -s 192.168.0.0/16 -j MASQUERADE
for wait in 1 1 2 2 3 end; do
grep '^SLX_DNS' "/opt/openslx/config" > /dev/null && break
[ "$wait" == "end" ] && echo "No DNS config found, using google dns" && break
echo "Waiting for DNS config.."
sleep "$wait"
done
# read the DNS configuration and configure the udhcpd
[ -z "${SLX_DNS}" ] && SLX_DNS="8.8.8.8"
sed -i "s,DNSSERVER,${SLX_DNS},;s,DOMAIN,${SLX_NET_DOMAIN}," \
"${DHCP_NAT_CONF}"
echo "static_lease $(echo "$macaddrprefix:$macaddrsuffix" | sed 's/%VMID%/01/') 192.168.101.20" >> "${DHCP_NAT_CONF}"
mkdir -p /var/lib/udhcpd
udhcpd -S "${DHCP_NAT_CONF}"
# creating and configuring vsw2
brctl addbr vsw2
ip link set dev vsw2 up
echo "1" >/proc/sys/net/ipv4/conf/vsw2/forwarding
|
