summaryrefslogtreecommitdiff
blob: f8773c93dc615a9e8fb77d4289d620f0e9445eb9 (plain)
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
#!/sbin/runscript
# Copyright 2009-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# You are not supposed to run this script directly. Create a symlink
# for the qemu instance you want to run as well as a copy of the
# configuration file and modify it appropriately like so...
#
#   ln -s qemu /etc/init.d/kvm.myserver
#   cp /etc/conf.d/qemu /etc/conf.d/kvm.myserver
#   nano /etc/conf.d/kvm.myserver
#
# where 'kvm' is the virtual machine type ('qemu' and 'kvm' allowed)
# and 'myserver' is the name of your instance.

VMNAME=${SVCNAME#*.}
VMTYPE=${SVCNAME%.*}
VM_BINARY=
PIDFILE=/run/vm/${SVCNAME}.pid
MONITOR=/run/vm/${SVCNAME}.monitor
QTAP_FILE=/run/vm/${SVCNAME}.qtap
ENABLE_SDL=

discern_vm_binary() {
	case "$VMTYPE" in
		kvm)
			VM_BINARY=$(which "qemu-system-${QEMU_TYPE}")
			[ -z "$VM_BINARY" ] && eerror "Failed to find the binary for qemu-system-${QEMU_TYPE}"
			;;
		qemu)
			VM_BINARY=$(which "qemu-${QEMU_TYPE}")
			[ -z "$VM_BINARY" ] && eerror "Failed to find the binary for qemu-${QEMU_TYPE}"
			;;
		*)
			eerror "Failed to discern the binary for $VMTYPE"
			;;
	esac
	return 0
}

discern_foreground() {
	if [ -n "$VNC" ]; then
		ewarn "VNC option is going away; set FOREGROUND=\"vnc=${VNC}\" instead"
		FOREGROUND="vnc=${VNC}"
	fi
	case "${FOREGROUND:-none}" in
		vnc*)
			VNC=${FOREGROUND#*=}
			if [ -z "$VNC" ]; then
				eerror "FOREGROUND vnc is incorrectly set; must specify an address (:1 for example)"
				return 1
			fi
			;;
		sdl*)
			ENABLE_SDL=${FOREGROUND#*=}
			if [ -z "${ENABLE_SDL}" ]; then
				eerror "FOREGROUND sdl is incorrectly set; must specify a DISPLAY address"
				return 1
			fi
			;;
		none)
			;;
		*)
			eerror "Unknown FOREGROUND setting: $FOREGROUND"
			return 1
			;;
	esac
	return 0
}

DROP_USER=${DROP_USER:-nobody}
MEMORY=${MEMORY:-512M}
TIMEOUT=${TIMEOUT:-300}
SMP=${SMP:-1}
export KVM_USER=${KVM_USER:-"root"}

extra_commands="reboot"

depend() {
	if [ "$VMNAME" = "$SVCNAME" ]; then
		return 0
	fi

	sanity_check || return 1

	case "$NIC_TYPE" in
		br)
			need ${NIC_NET_DEPS-net.br0}
			;;
	esac
}

send_command() {
	local command="socat -u - UNIX-CONNECT:${MONITOR}"
	type -p nc6 > /dev/null && command="nc6 -U ${MONITOR} --send-only"
	echo "$@" | ${command} > /dev/null 2>&1
}

symlink_check() {
	if [ "${VMNAME}" = "${SVCNAME}" ]; then
		eerror "You are not supposed to run this script directly. Create a symlink"
		eerror "for the qemu instance you want to run as well as a copy of the"
		eerror "configuration file and modify it appropriately like so..."
		eerror
		eerror "  ln -s qemu /etc/init.d/kvm.myserver"
		eerror "  cp /etc/conf.d/qemu /etc/conf.d/kvm.myserver"
		eerror "  `basename "${EDITOR:-nano}"` /etc/conf.d/kvm.myserver"
		eerror
		eerror "where 'kvm' is the virtual machine type ('qemu' and 'kvm' allowed)"
		eerror "and 'myserver' is the name of your instance."
		return 1
	fi
}

sanity_check() {
	symlink_check || return 1

	DISKIMAGE=$(readlink -f "${DISKIMAGE}")
	if [ ! -f "${DISKIMAGE}" -a ! -b "${DISKIMAGE}" ]; then
		eerror "couldn't find \$DISKIMAGE '$DISKIMAGE'"
		return 1;
	fi
	discern_vm_binary || return 1
	NIC_TYPE=${NIC_TYPE:-nat}

	discern_foreground || return 1
}

start_pre() {
	checkpath -d --owner root:root --mode 0644 "${PIDFILE%/*}" \
		"${MONITOR%/*}"
}

start() {
	sanity_check || return 1

	local NIC_COMMAND=(	-net "nic,model=${NIC_MODEL:-virtio},macaddr=${MACADDR}" -net )

	if [ "${NIC_TYPE}" = "br" ]; then
		ebegin "creating qtap ${QTAP:-(auto allocating one)}"
		if [ -n "$QTAP" ]; then
			qtap-manipulate create_specific "${QTAP}" -u "${DROP_USER}"
		else
			QTAP=$(qtap-manipulate create -u "${DROP_USER}")
			if [ 0 != $? ]; then
				eerror "failed to create qtap interface"
				return 1
			fi
		fi
		echo "${QTAP}" > ${QTAP_FILE}
		eend $?
		NIC_COMMAND[${#NIC_COMMAND[@]}]="tap,ifname=${QTAP},script=no"
	elif [ "${NIC_TYPE}" = "none" ]; then
		NIC_COMMAND=( -net none )
	else
		NIC_COMMAND[${#NIC_COMMAND[@]}]=user
	fi

	local ss_args=( )
	local vm_args=( -daemonize )

	if [ -n "${ENABLE_SDL}" ]; then
		ss_args[${#ss_args[@]}]=--env
		ss_args[${#ss_args[@]}]="DISPLAY=${ENABLE_SDL}"
		ss_args[${#ss_args[@]}]=--env
		local user_home=`getent passwd ${DROP_USER:-root} | cut -d: -f6`
		ss_args[${#ss_args[@]}]="XAUTHORITY=$user_home/.Xauthority"
		vm_args[${#vm_args[@]}]=-display
		vm_args[${#vm_args[@]}]=sdl
	elif [ -n "$VNC" ]; then
		vm_args[${#vm_args[@]}]=-display
		vm_args[${#vm_args[@]}]="vnc=${VNC}"
	else
		vm_args[${#vm_args[@]}]=-display
		vm_args[${#vm_args[@]}]=none
	fi

	ebegin "Starting ${VM_BINARY##*/} for ${VMNAME} ${FOREGROUND:+at ${FOREGROUND}}"
	set -- start-stop-daemon \
		--start "${VM_BINARY}" \
		--pidfile ${PIDFILE} \
		"${ss_args[@]}" \
		-- \
		"${vm_args[@]}" \
		-pidfile ${PIDFILE} -monitor unix:${MONITOR},server,nowait \
		-runas ${DROP_USER} -name ${VMNAME} \
		-drive file="${DISKIMAGE//,/,,}",if=${DRIVE_MODEL:-virtio},cache=${DRIVE_CACHE:-none}${DRIVE_FORMAT:+,format=${DRIVE_FORMAT}} \
		"${NIC_COMMAND[@]}" \
		${ENABLE_KVM:+--enable-kvm} ${CPU:+-cpu ${CPU}} \
		${MACHINE:+-M ${MACHINE}} \
		${MEMORY:+-m ${MEMORY}} ${SMP:+-smp ${SMP}} \
		${OTHER_ARGS}
	einfo "invoking ${@}"
	"${@}"
	ret=$?
	if [ "0" != "${ret}" -a -n "${QTAP}" ]; then
		qtap-manipulate destroy ${QTAP}
	fi

	eend ${ret}
}

reboot() {
	symlink_check || return 1

	ebegin "Rebooting ${VMNAME}"
	send_command system_reset
	eend $?
}

stop() {
	sanity_check || return 1

	ebegin "Powering off ${VMNAME}"
	send_command system_powerdown
	eend $?

	ebegin "waiting up to ${TIMEOUT} seconds for it to die"
	local pid
	[ -s "${PIDFILE}" ] && pid=$(cat "${PIDFILE}")
	if [ -z "$pid" ]; then
		eerror "Couldn't find stored pid at '$PIDFILE'; user will have to manually kill kvm"
		eerror "Will attempt to destroy qtap despite."
		eend 1
	else
		local ret=1
		for x in $(seq 0 ${TIMEOUT}); do
			if kill -0 "${pid}" > /dev/null 2>&1; then
				sleep 1s
				continue
			fi
			ret=0
			break
		done
		eend $ret
	fi

	ebegin "Stopping ${VM_BINARY##*/} for ${VMNAME}"
	if kill -0 "${pid}" > /dev/null 2>&1; then
		start-stop-daemon --stop "${VM_BINARY}" \
			--user "${DROP_USER}" \
			--pidfile "${PIDFILE}" \
			--quiet
		eend $?
	else
		eend 0  # no need to kill process if it is dead :P
	fi
	local qtap
	[ -s "${QTAP_FILE}" ] && qtap=$(cat "${QTAP_FILE}")
	if [ -n "$qtap" ]; then
		ebegin "destroying qtap ${qtap}"
		qtap-manipulate destroy ${qtap}
		eend $?
	fi
}