1、列出主机以及运行在其之上的nova相关的服务：
# nova host-describe mitaka
2、获取运行在主机上所有实例的资源使用总量：
# nova host-describe mitaka
cpu一栏显示了运行在主机上的实例的虚拟CPU总量。
memory_mb一栏显示了运行在主机上实例所分配动内存总量(以MB计算)。
disk_gb一栏显示了运行在主机上实例的根磁盘和临时磁盘的大小总量(以GB计算)。
在PROJECT 一栏中used_now一排的值显示的是运行在主机上所分配给实例的资源总量，加上主机本身的所分配的虚拟机的资源。
在PROJECT 一栏中used_now一排的值显示的是运行在主机上所分配给实例的资源总量。
新版本的openstack查询方法
3、查询节点列表
[root@node3 ~]# nova hypervisor-list
+--------------------------------------+---------------------+-------+---------+
| ID | Hypervisor hostname | State | Status |
+--------------------------------------+---------------------+-------+---------+
| 896fbed4-d9ff-4fdf-9d89-5bf9e712f2d1 | node3 | up | enabled |
| 26b98c32-a837-4c5c-b360-7e8520a249af | node2 | up | enabled |
| 1f34784f-2b01-4b78-88a4-ece0c58c546d | node1 | up | enabled |
+--------------------------------------+---------------------+-------+---------+
4、查看节点信息
[root@node3 ~]# nova hypervisor-show 26b98c32-a837-4c5c-b360-7e8520a249af
+---------------------------+------------------------------------------+
| Property | Value |
+---------------------------+------------------------------------------+
| cpu_info_arch | x86_64 |
| cpu_info_features | ["pge", "avx", "xsaveopt", "clflush", |
| | "sep", "rtm", "tsc_adjust", "tsc- |
| | deadline", "invpcid", "tsc", "fsgsbase", |
| | "xsave", "smap", "vmx", "erms", "hle", |
| | "cmov", "smep", "fpu", "pat", "arat", |
| | "lm", "msr", "adx", "3dnowprefetch", |
| | "nx", "fxsr", "syscall", "sse4.1", |
| | "pae", "sse4.2", "pclmuldq", "pcid", |
| | "fma", "vme", "mmx", "osxsave", "cx8", |
| | "mce", "de", "aes", "mca", "pse", |
| | "lahf_lm", "abm", "rdseed", "popcnt", |
| | "pdpe1gb", "apic", "sse", "f16c", "pni", |
| | "rdtscp", "avx2", "sse2", "ss", |
| | "hypervisor", "bmi1", "bmi2", "ssse3", |
| | "cx16", "pse36", "mtrr", "movbe", |
| | "rdrand", "x2apic"] |
| cpu_info_model | Broadwell |
| cpu_info_topology_cells | 1 |
| cpu_info_topology_cores | 1 |
| cpu_info_topology_sockets | 16 |
| cpu_info_topology_threads | 1 |
| cpu_info_vendor | Intel |
| current_workload | 0 |
| disk_available_least | 1117 |
| free_disk_gb | 1199 |
| free_ram_mb | 32255 |
| host_ip | 192.168.70.66 |
| hypervisor_hostname | node2 |
| hypervisor_type | QEMU |
| hypervisor_version | 2012000 |
| id | 26b98c32-a837-4c5c-b360-7e8520a249af |
| local_gb | 1199 |
| local_gb_used | 0 |
| memory_mb | 32767 |
| memory_mb_used | 512 |
| running_vms | 0 |
| service_disabled_reason | None |
| service_host | node2 |
| service_id | de1c8d08-f0bf-4873-a698-bc1744090790 |
| state | up |
| status | enabled |
| vcpus | 16 |
| vcpus_used | 0 |
+---------------------------+------------------------------------------+
或者
# nova hypervisor-stats
+----------------------+--------+
| Property | Value |
+----------------------+--------+
| count | 4 |
| current_workload | 0 |
| disk_available_least | 4544 |
| free_disk_gb | 4796 |
| free_ram_mb | 104444 |
| local_gb | 4796 |
| local_gb_used | 0 |
| memory_mb | 106492 |
| memory_mb_used | 2048 |
| running_vms | 0 |
| vcpus | 52 |
| vcpus_used | 0 |
+----------------------+--------+
