Python libvirt:从状态整数到字符串?
我有这个简单的脚本来检查libvirt管理的虚拟机的内存使用情况 如何将Python libvirt:从状态整数到字符串?,python,libvirt,Python,Libvirt,我有这个简单的脚本来检查libvirt管理的虚拟机的内存使用情况 如何将state的整数从dom.info()转换为人类可读的字符串 import libvirt import re import sys def mem_total_kb(): meminfo = open('/proc/meminfo').read() matched = re.search(r'^MemTotal:\s+(\d+)', meminfo) return int(matched.gr
state
的整数从dom.info()
转换为人类可读的字符串
import libvirt
import re
import sys
def mem_total_kb():
meminfo = open('/proc/meminfo').read()
matched = re.search(r'^MemTotal:\s+(\d+)', meminfo)
return int(matched.groups()[0])
def main():
conn = libvirt.openReadOnly(None)
if conn == None:
print 'Failed to open connection to the hypervisor'
sys.exit(1)
used_mem_sum = 0
for domain_id in conn.listDomainsID():
dom = conn.lookupByID(domain_id)
state, max_mem, used_mem, vcpus, cpu_time_used = dom.info()
print(
'name=%s state=%s max_mem=%s used_mem=%s vcpus=%s cpu_time_used=%s' % (dom.name(), state, max_mem, used_mem, vcpus, cpu_time_used))
used_mem_sum += used_mem
print('Sum of used mem: %s KiB' % used_mem_sum)
mem_total = mem_total_kb()
print('Sum of physical mem: %s KiB' % mem_total)
if used_mem_sum > mem_total:
print('########## VMs use more RAM than available!')
return
mem_left=mem_total - used_mem_sum
print('Memory left: %s KiB' % (mem_left))
mem_left_should=4000000
if mem_left<mem_left_should:
print('less than mem_left_should=%sKiB left!' % mem_left_should)
if __name__ == '__main__':
main()
此bash脚本将获取
virDomainState
值列表(不包括VIR\u DOMAIN\u LAST
)及其JSON格式的描述:
#!/bin/bash
HEADER=include/libvirt/libvirt-domain.h
get_header_file()
{
curl -s https://raw.githubusercontent.com/libvirt/libvirt/master/"$HEADER"
}
select_virDomainState_block()
{
sed -n '/virDomainState:/,/^\} virDomainState;/ p'
}
join_multiline_comments()
{
sed -n '\%/\*[^*]*$% N; \%/\*.*\*/$% { s/\s*\n\s*/ /; p; }'
}
enum_values_to_json_map()
{
echo '{'
sed "s/\s*VIR_DOMAIN\S\+\s*=\s*//; s^,\s*/\*\s*^ : '^; s^\s*\*/^',^;"
echo '}'
}
get_header_file \
| select_virDomainState_block \
| join_multiline_comments \
| grep 'VIR_DOMAIN\S\+\s*=' \
| enum_values_to_json_map
用法示例:
$ ./get_libvirt_domain_states
{
0 : 'no state',
1 : 'the domain is running',
2 : 'the domain is blocked on resource',
3 : 'the domain is paused by user',
4 : 'the domain is being shut down',
5 : 'the domain is shut off',
6 : 'the domain is crashed',
7 : 'the domain is suspended by guest power management',
}
请注意,该脚本从GitHub的libvirt镜像存储库下载一个约150KB的文件。它旨在促进libvirt代码的更新。当然,您可以从python代码中调用它,但就个人而言,我不会这样做。看起来至少枚举常量名称在
libvirt
模块中公开了。以下是我的作品
import libvirt
import pprint
import re
d = {}
for k, v in libvirt.__dict__.iteritems():
if re.match('VIR_DOMAIN_[A-Z]+$', k):
d[v] = k
pprint.pprint(d)
…还有指纹
{0: 'VIR_DOMAIN_NOSTATE',
1: 'VIR_DOMAIN_RUNNING',
2: 'VIR_DOMAIN_BLOCKED',
3: 'VIR_DOMAIN_PAUSED',
4: 'VIR_DOMAIN_SHUTDOWN',
5: 'VIR_DOMAIN_SHUTOFF',
6: 'VIR_DOMAIN_CRASHED',
7: 'VIR_DOMAIN_PMSUSPENDED'}
这些描述可能只是原始源代码中的注释,可能没有公开。其中一个例子定义了自己的字典
…所以你可以从这里开始,尽管它似乎不完整。你能举个例子说明你的意思吗,例如,
1->One
?@jcfollower我更新了这个问题。因为它很小,你能自己编一本字典吗state_descr={0:'无状态',1:'域正在运行',…}
@jcfollower是的,这会起作用。但我想还有更好的解决办法。我说的“更好”是指一个解决方案,在这个解决方案中,我不能打字,名字来自libvirt。嗯,这取决于互联网连接。。。。没有办法通过libvirt从整数到字符串吗?libvirt似乎没有提供这样的功能。至少我找不到它。您必须在代码中维护自己的字典(正如@jcclopper所建议的)。我只是让你更容易保持字典与libvirt代码的同步。从整数到VIR_域名的映射就是我所需要的。非常感谢你。
{0: 'VIR_DOMAIN_NOSTATE',
1: 'VIR_DOMAIN_RUNNING',
2: 'VIR_DOMAIN_BLOCKED',
3: 'VIR_DOMAIN_PAUSED',
4: 'VIR_DOMAIN_SHUTDOWN',
5: 'VIR_DOMAIN_SHUTOFF',
6: 'VIR_DOMAIN_CRASHED',
7: 'VIR_DOMAIN_PMSUSPENDED'}
state_names = { libvirt.VIR_DOMAIN_RUNNING : "running",
libvirt.VIR_DOMAIN_BLOCKED : "idle",
libvirt.VIR_DOMAIN_PAUSED : "paused",
libvirt.VIR_DOMAIN_SHUTDOWN : "in shutdown",
libvirt.VIR_DOMAIN_SHUTOFF : "shut off",
libvirt.VIR_DOMAIN_CRASHED : "crashed",
libvirt.VIR_DOMAIN_NOSTATE : "no state" }