通过编写Shell、Python脚本来实现在线管理KVM虚拟机

来自一位码农的偷懒想法：

1 python2.7

2 python的web框架 bottle

3 shell脚本管理kvm

以及WebVirtMgr组合在一起就可以了~

这段时间我会用bottle 简单的实现管理kvm 主机,准备开源出去的~ 性能烂的话，别怪我~

管理kvm主机完全可以在web页面上完成，国外有个人用django写了这套程序，感觉还不错，只是稍复杂，bug有点多。。。。  个人觉得 

自己开写一套简单的，python本身有kvm的库，大家要是觉得麻烦的话，也可以用os模块，调用virsh的命令来管理kvm主机，这完全是可行的~

参看文档：https://www.webvirtmgr.net/docs/

上面是安装配置的教程——工欲善其事必先利其器^_^

安装好需要的库之后，直接运行就好了

./manage.py runserver 10.96.60.61:8000

 

 

也可以利用这个小脚本，针对虚拟机开机，关机，重启~

用法:

1. 查看虚拟机列表~
2. # kvmctl.sh --list
3. machine1
4. machine2
5. machineN
6. 开启虚拟机
7. # kvmctl.sh machine2 startd
8. Starting up 'machine2' ... (daemon mode)
9. 虚拟机状态
10. # kvmctl.sh --show
11. MACHINE PID STIME TIME
12. machine1 4856 Feb11 10:34:59
13. machine2 11155 Mar12 00:05:45
14. 关闭虚拟机
15. # kvmctl.sh machine1 stop
16. Shutting down 'machine1' ...

 

Config file example:

KVM_M=1G

KVM_HDA=$BASEDIR/$MACHINE/root.qcow2

KVM_HDB=$BASEDIR/$MACHINE/swap.qcow2

KVM_HDC=$BASEDIR/.imgs/mysql.raw

KVM_HDD=$BASEDIR/.imgs/tmp.qcow2

KVM_NET="nic,macaddr=52:54:00:00:02:52 -net tap"

KVM_PIDFILE=/var/run/192.168.0.249.pid

KVM_TCP_PORT=10000

KVM_MONITOR="tcp:127.0.0.1:${KVM_TCP_PORT},server,nowait"

KVM_EXTRA=

 为了简化管理工作量，现贡献以下beta版的shell脚本，以供大家参考，也可以留言附上您的建议和代码片段

1. #!/bin/bash
2. BASEDIR="/var/local/kvm"
3. KVM="/usr/bin/kvm"
4. KVM_CONFIG="settings.cfg"
6. do_help()
7. {
8. PROGRAM_NAME=`basename $0`
9. echo "Usage:"
10. echo "$PROGRAM_NAME machine (start|startd|stop|monitor|status|settings|edit)"
11. echo "$PROGRAM_NAME (--help|--list|--show)"
12. }
14. if [ $# -eq 0 ]; then
15. do_help
16. exit 1
17. fi
19. if [ "$1" == "--help" ]; then
20. do_help
21. exit 0
22. fi
24. if [ "$1" == "--list" ]; then
25. ls -1 $BASEDIR
26. exit 0
27. fi
29. if [ "$1" == "--show" ]; then
30. ps -ef | awk -v format="%-19s %-7s %-7s %s\n" '\
31. BEGIN { \
32. printf(format,"MACHINE", "PID", "STIME", "TIME") \
33. } \
34. /kvm -name/&&!/awk/ { \
35. printf(format, $10, $2, $5, $7) \
36. }'
37. exit 0
38. fi
40. MACHINE=$1
41. MACHINEDIR=$BASEDIR/$MACHINE
43. if [ ! -d $MACHINEDIR ]; then
44. echo -e "Error. (Machine not found at $BASEDIR/)\n"
45. do_help
46. exit 1
47. fi
49. do_load_settings()
50. {
51. if [ -f "$MACHINEDIR/$KVM_CONFIG" ]; then
52. source $MACHINEDIR/$KVM_CONFIG
53. else
54. echo -e "Error. ($MACHINEDIR/$KVM_CONFIG not found)\n"
56. echo "Example $KVM_CONFIG:"
57. echo 'KVM_M=512M'
58. echo 'KVM_HDA=$BASEDIR/$MACHINE/root.qcow2'
59. echo 'KVM_HDB=$BASEDIR/.imgs/swap.qcow2'
60. echo 'KVM_HDC=$BASEDIR/.imgs/home.qcow2'
61. echo 'KVM_HDD='
62. echo 'KVM_NET="nic,macaddr=52:54:00:00:02:53 -net tap"'
63. echo 'KVM_TCP_PORT=10001'
64. echo 'KVM_PIDFILE=/var/run/192.168.0.253.pid'
65. echo 'KVM_MONITOR="tcp:127.0.0.1:${KVM_TCP_PORT},server,nowait"'
66. echo 'KVM_EXTRA='
68. exit 1
69. fi
70. }
72. do_check_tcp_port()
73. {
74. if [ -z "$1" ]; then
75. echo "Error. (KVM_TCP_PORT is not set)"
76. exit 1
77. fi
78. }
80. case "$2"in
82. start|startd)
84. do_load_settings
86. PARAMS="-name $MACHINE"
88. [ "$2" == "startd" ] \
89. && PARAMS="$PARAMS -vnc none -daemonize" \
90. && MSG="(daemon mode)"
92. [ -n "$KVM_M" ] && PARAMS="$PARAMS -m $KVM_M"
93. [ -n "$KVM_HDA" ] && PARAMS="$PARAMS -hda $KVM_HDA"
94. [ -n "$KVM_HDB" ] && PARAMS="$PARAMS -hdb $KVM_HDB"
95. [ -n "$KVM_HDC" ] && PARAMS="$PARAMS -hdc $KVM_HDC"
96. [ -n "$KVM_HDD" ] && PARAMS="$PARAMS -hdd $KVM_HDD"
97. [ -n "$KVM_NET" ] && PARAMS="$PARAMS -net $KVM_NET"
98. [ -n "$KVM_PIDFILE" ] && PARAMS="$PARAMS -pidfile $KVM_PIDFILE"
99. [ -n "$KVM_MONITOR" ] && PARAMS="$PARAMS -monitor $KVM_MONITOR"
101. [ -n "$KVM_EXTRA" ] && PARAMS="$PARAMS $KVM_EXTRA"
103. echo "Starting up '$MACHINE' ... $MSG"
104. $KVM $PARAMS
106. [ $? -ne 0 ] \
107. && echo "Error. (Couldn't run KVM)"
108. ;;
110. stop)
112. do_load_settings
113. do_check_tcp_port $KVM_TCP_PORT
115. echo "Shutting down '$MACHINE' ..."
116. echo "system_powerdown" | nc 127.0.0.1 $KVM_TCP_PORT &>/dev/null
118. if [ $? -ne 0 ]; then
119. echo "Error. (Couldn't connect. Is the machine up?)"
120. exit 1
121. fi
123. ;;
125. monitor)
127. do_load_settings
128. do_check_tcp_port $KVM_TCP_PORT
130. echo "Starting Monitor for '$MACHINE'... (Ctrl+C to exit)"
131. nc 127.0.0.1 $KVM_TCP_PORT
133. ;;
135. status)
137. do_load_settings
138. do_check_tcp_port $KVM_TCP_PORT
140. INFO="info status\ninfo kvm\ninfo network"
142. echo -e $INFO | nc -w 1127.0.0.1 $KVM_TCP_PORT \
143. && echo ""
145. if [ $? -ne 0 ]; then
146. echo "Error. (Couldn't connect. Is the machine up?)"
147. exit 1
148. fi
150. ;;
152. settings)
154. do_load_settings
155. cat $MACHINEDIR/$KVM_CONFIG
157. ;;
159. edit)
161. if [ -z "$EDITOR" ]; then
162. echo "Error. (EDITOR is not set)"
163. exit 1
164. fi
166. do_load_settings
168. if [ -n "$KVM_PIDFILE" -a -f "$KVM_PIDFILE" ]; then
169. echo -n "Warning! '$MACHINE' is running. Continue? (y/N) "
170. read CONTINUE
172. [ "$CONTINUE" != "y" -a "$CONTINUE" != "Y" ] \
173. && exit 1
175. fi
177. $EDITOR $MACHINEDIR/$KVM_CONFIG
179. ;;
181. *)
182. do_help
183. exit 1
184. ;;
186. esac
188. exit 0