source: trunk/packages/invirt-xen-config/debian/invirt-xen-config.init @ 1582

Last change on this file since 1582 was 1580, checked in by broder, 16 years ago

Use a lock LV when starting sysvms since exclusive LV activation has
useless semantics

  • Property svn:executable set to *
File size: 2.4 KB
Line 
1#!/bin/bash
2### BEGIN INIT INFO
3# Provides:          invirt-xen-config
4# Required-Start:    $local_fs $remote_fs
5# Required-Stop:     $local_fs $remote_fs
6# Default-Start:     2 3 4 5
7# Default-Stop:      0 1 6
8# Short-Description: Startup script for the Invirt Xen host
9# Description:       
10### END INIT INFO
11
12PACKAGE=invirt-xen-config
13NAME="$PACKAGE"
14DESC="Invirt Xen host"
15PARENTPACKAGE=xend
16SYSVMS=(s_master s_remote s_console)
17GEN_FILES=(/etc/xen/xend-config.sxp.invirt "${SYSVMS[@]/#//etc/xen/sysvms/}")
18
19dpkg -s "$PACKAGE" >/dev/null 2>/dev/null || exit 0
20
21. /lib/init/gen-files.sh
22. /lib/init/std-init.sh
23
24start_sysvm() {
25    # Attempt to start a sysvm, but only if it's not running already
26    # somewhere on the cluster
27   
28    VM="$1"
29    LV="${VM}_hda"
30    DISK="/dev/xenvg/$LV"
31   
32    # Don't bother trying to start the VM if it's already running
33    if xm list "$VM" >/dev/null 2>&1; then
34        return 1
35    fi
36   
37    RET=1
38    # To keep multiple hosts from trying to start a VM at the same
39    # time, lock VM creation at startup-time with a lock LV, since LV
40    # creation is atomic
41    if lvcreate -L 1K -n "lock_${LV}" xenvg >/dev/null 2>&1; then
42        # If we can disable the LV, then the VM isn't already running
43        # somewhere else
44        if lvchange -a n "$DISK" >/dev/null 2>&1; then
45            lvchange -a y "$DISK" >/dev/null 2>&1
46           
47            [ "$VERBOSE" != no ] && log_daemon_msg "Starting sysvm $VM"
48            xm create "sysvms/$VM" >/dev/null
49            [ "$VERBOSE" != no ] && log_end_msg $?
50            RET=0
51        fi
52       
53        # Regardless of whether we could get the lock or not, the
54        # lvchange -a n probably disabled the LV somewhere; be sure we
55        # clean up
56        lvchange -a y "$DISK" >/dev/null 2>&1
57   
58        # Cleanup the lock, regardless of whether we started the LV
59        lvchange -a n "/dev/xenvg/lock_${LV}"
60        lvremove -f "/dev/xenvg/lock_${LV}"
61    fi
62   
63    return $RET
64}
65
66do_startup() {
67    gen_files
68   
69    for vm in "${SYSVMS[@]}"; do
70        start_sysvm "$vm"
71    done
72   
73    echo 1 >/proc/sys/net/ipv4/ip_forward
74    for i in all default; do
75        echo 1 >/proc/sys/net/ipv4/conf/$i/rp_filter
76        echo 1 >/proc/sys/net/ipv4/conf/$i/proxy_arp
77    done
78   
79    invoke-rc.d "$PARENTPACKAGE" "$1"
80}
81
82do_start() {
83    do_startup "start"
84}
85
86do_reload() {
87    do_startup "reload"
88}
89
90do_stop() {
91    invoke-rc.d "$PARENTPACKAGE" stop
92}
93
94std_init "$1"
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