访问远程libvirtd服务

因为是在一个可信环境中运行，所以可以忽略安全方面的操作，步骤如下：

（1）更改libvirtd配置

    1.1 更改/ect/sysconfig/libvirtd文件，打开LIBVIRTD_ARGS="--listen"设置

    1.2 更改/etc/libvirt/libvirtd.conf

        listen_tls = 0 #关闭tls

        listen_tcp = 1 # 打开tcp

        tcp_port = "16509" # 侦听关口

        listen_addr="0.0.0.0" # 侦听地址

        auth_tcp = "none" # 允许匿名访问

(2) 可以通过 virsh -c qemu+tcp://10.2.3.123:16509/system来访问10.2.3.123上面的libvirtd服务

(3) python代码示例如下：

　　

import libvirtimport sysimport logging'''enum virDomainState {VIR_DOMAIN_NOSTATE    =     0    no stateVIR_DOMAIN_RUNNING    =     1    the domain is runningVIR_DOMAIN_BLOCKED    =     2    the domain is blocked on resourceVIR_DOMAIN_PAUSED    =     3    the domain is paused by userVIR_DOMAIN_SHUTDOWN    =     4    the domain is being shut downVIR_DOMAIN_SHUTOFF    =     5    the domain is shut offVIR_DOMAIN_CRASHED    =     6    the domain is crashedVIR_DOMAIN_PMSUSPENDED    =     7    the domain is suspended by guest power managementVIR_DOMAIN_LAST    =     8    NB: this enum value will increase over time as new events are added to the libvirt API. It reflects the last state supported by this version of the libvirt API.}struct virDomainInfo {unsigned char    state    the running state, one of virDomainStateunsigned long    maxMem    the maximum memory in KBytes allowedunsigned long    memory    the memory in KBytes used by the domainunsigned short    nrVirtCpu    the number of virtual CPUs for the domainunsigned long long    cpuTime    the CPU time used in nanoseconds}'''def get_VM_infos(host, port=16509):    '''    list domains of the specified host    '''    infos = []    try:        pass            uri = 'qemu+tcp://%s:%s/system' % (host, port)        conn = libvirt.openReadOnly(uri)        # list the defined but inactive domains        domains = [conn.lookupByName(name) for name in conn.listDefinedDomains()]        # list active domains        domains.extend([conn.lookupByID(i) for i in conn.listDomainsID()])        # for dom in domains:        #     print 'ID = %d' % dom.ID()        #     print 'Name = %s' % dom.name()        #     infos = dom.info()        #     print 'State = %d' % infos[0]        #     # print 'State = %s' %s dom.state(0)        #     print 'Max Memory = %s' % infos[1]        #     print 'Memory = %s' % info[2]        #     # print 'Max Memory = %d' % dom.maxMemory        #     print 'Number of virt CPUs = %d' % infos[3]        #     # print 'Number of virt CPUs = %s' % dom.maxVcpus()        #     print 'CPU Time (in ns) = %d' % infos[4]        #     print ' '        for dom in domains:            infos.append(dom.info())    except Exception, e:        print e    return infosif __name__ == '__main__':    infos = get_VM_infos('10.2.3.250', 16509)    print infos