NoValidHost：找不到有效的主機。沒有足夠的可用主機

當我在儀表板創建實例，我得到錯誤：NoValidHost：找不到有效的主機。沒有足夠的可用主機

在/var/log/nova/nova-conductor.log文件中，有日誌：

2017-08-05 00:22:29.046 3834 WARNING nova.scheduler.utils [req-89c159c7-b40a-43eb-8f0d-9306eb73e83a 2a5fa182fb1b459980db09cd1572850e 0d5998f2f7ec4c4892a32e06bafb19df - - -] Failed to compute_task_build_instances: No valid host was found. There are not enough hosts available. 
Traceback (most recent call last): 

    File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 199, in inner 
    return func(*args, **kwargs) 

    File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py", line 104, in select_destinations 
    dests = self.driver.select_destinations(ctxt, spec_obj) 

    File "/usr/lib/python2.7/site-packages/nova/scheduler/filter_scheduler.py", line 74, in select_destinations 
    raise exception.NoValidHost(reason=reason) 

NoValidHost: No valid host was found. There are not enough hosts available. 

2017-08-05 00:22:29.048 3834 WARNING nova.scheduler.utils [req-89c159c7-b40a-43eb-8f0d-9306eb73e83a 2a5fa182fb1b459980db09cd1572850e 0d5998f2f7ec4c4892a32e06bafb19df - - -] [instance: 2011e343-c8fc-4ed0-8148-b0d2b5ba37c3] Setting instance to ERROR state. 
2017-08-05 00:22:30.785 3834 WARNING oslo_config.cfg [req-89c159c7-b40a-43eb-8f0d-9306eb73e83a 2a5fa182fb1b459980db09cd1572850e 0d5998f2f7ec4c4892a32e06bafb19df - - -] Option "auth_plugin" from group "neutron" is deprecated. Use option "auth_type" from group "neutron".

我搜索了SO，找到相關的帖子：Openstack-Devstack: Can't create instance, There are not enough hosts available

我檢查了free_ram_mb在MySQL：

MariaDB [nova]> select * from compute_nodes \G; 
*************************** 1. row *************************** 
      created_at: 2017-08-04 12:44:26 
      updated_at: 2017-08-04 13:51:35 
      deleted_at: NULL 
        id: 4 
      service_id: NULL 
       vcpus: 8 
      memory_mb: 7808 
      local_gb: 19 
      vcpus_used: 0 
     memory_mb_used: 512 
     local_gb_used: 0 
     hypervisor_type: QEMU 
    hypervisor_version: 1005003 
      cpu_info: {"vendor": "Intel", "model": "Broadwell", "arch": "x86_64", "features": ["smap", "avx", "clflush", "sep", "rtm", "vme", "invpcid", "msr", "fsgsbase", "xsave", "pge", "erms", "hle", "cmov", "tsc", "smep", "pcid", "pat", "lm", "abm", "adx", "3dnowprefetch", "nx", "fxsr", "syscall", "sse4.1", "pae", "sse4.2", "pclmuldq", "fma", "tsc-deadline", "mmx", "osxsave", "cx8", "mce", "de", "rdtscp", "ht", "pse", "lahf_lm", "rdseed", "popcnt", "mca", "pdpe1gb", "apic", "sse", "f16c", "ds", "invtsc", "pni", "aes", "avx2", "sse2", "ss", "hypervisor", "bmi1", "bmi2", "ssse3", "fpu", "cx16", "pse36", "mtrr", "movbe", "rdrand", "x2apic"], "topology": {"cores": 2, "cells": 1, "threads": 1, "sockets": 4}} 
disk_available_least: 18 
      free_ram_mb: 7296 
     free_disk_gb: 19 
    current_workload: 0 
      running_vms: 0 
    hypervisor_hostname: ha-node1 
       deleted: 0 
       host_ip: 192.168.8.101 
    supported_instances: [["i686", "qemu", "hvm"], ["x86_64", "qemu", "hvm"]] 
      pci_stats: {"nova_object.version": "1.1", "nova_object.changes": ["objects"], "nova_object.name": "PciDevicePoolList", "nova_object.data": {"objects": []}, "nova_object.namespace": "nova"} 
       metrics: [] 
     extra_resources: NULL 
       stats: {} 
     numa_topology: NULL 
       host: ha-node1 
ram_allocation_ratio: 3 
cpu_allocation_ratio: 16 
       uuid: 9113940b-7ec9-462d-af06-6988dbb6b6cf 
disk_allocation_ratio: 1 
*************************** 2. row *************************** 
      created_at: 2017-08-04 12:44:34 
      updated_at: 2017-08-04 13:50:47 
      deleted_at: NULL 
        id: 6 
      service_id: NULL 
       vcpus: 8 
      memory_mb: 7808 
      local_gb: 19 
      vcpus_used: 0 
     memory_mb_used: 512 
     local_gb_used: 0 
     hypervisor_type: QEMU 
    hypervisor_version: 1005003 
      cpu_info: {"vendor": "Intel", "model": "Broadwell", "arch": "x86_64", "features": ["smap", "avx", "clflush", "sep", "rtm", "vme", "invpcid", "msr", "fsgsbase", "xsave", "pge", "erms", "hle", "cmov", "tsc", "smep", "pcid", "pat", "lm", "abm", "adx", "3dnowprefetch", "nx", "fxsr", "syscall", "sse4.1", "pae", "sse4.2", "pclmuldq", "fma", "tsc-deadline", "mmx", "osxsave", "cx8", "mce", "de", "rdtscp", "ht", "pse", "lahf_lm", "rdseed", "popcnt", "mca", "pdpe1gb", "apic", "sse", "f16c", "ds", "invtsc", "pni", "aes", "avx2", "sse2", "ss", "hypervisor", "bmi1", "bmi2", "ssse3", "fpu", "cx16", "pse36", "mtrr", "movbe", "rdrand", "x2apic"], "topology": {"cores": 2, "cells": 1, "threads": 1, "sockets": 4}} 
disk_available_least: 18 
      free_ram_mb: 7296 
     free_disk_gb: 19 
    current_workload: 0 
      running_vms: 0 
    hypervisor_hostname: ha-node2 
       deleted: 0 
       host_ip: 192.168.8.102 
    supported_instances: [["i686", "qemu", "hvm"], ["x86_64", "qemu", "hvm"]] 
      pci_stats: {"nova_object.version": "1.1", "nova_object.changes": ["objects"], "nova_object.name": "PciDevicePoolList", "nova_object.data": {"objects": []}, "nova_object.namespace": "nova"} 
       metrics: [] 
     extra_resources: NULL 
       stats: {} 
     numa_topology: NULL 
       host: ha-node2 
ram_allocation_ratio: 3 
cpu_allocation_ratio: 16 
       uuid: 32b574df-52ac-43dc-87f8-353350449076 
disk_allocation_ratio: 1 
2 rows in set (0.00 sec)

你看free_ram_mb: 7296，我只是想創建一個512 MB VM，但未能成功。

EDIT-1

新星服務都是最高：

[[email protected] ~]# nova service-list 
+----+------------------+----------+----------+---------+-------+----------------------------+-----------------+ 
| Id | Binary   | Host  | Zone  | Status | State | Updated_at     | Disabled Reason | 
+----+------------------+----------+----------+---------+-------+----------------------------+-----------------+ 
| 2 | nova-consoleauth | ha-node3 | internal | enabled | up | 2017-08-05T14:20:25.000000 | -    | 
| 5 | nova-conductor | ha-node3 | internal | enabled | up | 2017-08-05T14:20:29.000000 | -    | 
| 7 | nova-cert  | ha-node3 | internal | enabled | up | 2017-08-05T14:20:23.000000 | -    | 
| 15 | nova-scheduler | ha-node3 | internal | enabled | up | 2017-08-05T14:20:20.000000 | -    | 
| 22 | nova-cert  | ha-node1 | internal | enabled | up | 2017-08-05T14:20:26.000000 | -    | 
| 29 | nova-conductor | ha-node1 | internal | enabled | up | 2017-08-05T14:20:22.000000 | -    | 
| 32 | nova-consoleauth | ha-node1 | internal | enabled | up | 2017-08-05T14:20:29.000000 | -    | 
| 33 | nova-consoleauth | ha-node2 | internal | enabled | up | 2017-08-05T14:20:29.000000 | -    | 
| 36 | nova-scheduler | ha-node1 | internal | enabled | up | 2017-08-05T14:20:30.000000 | -    | 
| 40 | nova-conductor | ha-node2 | internal | enabled | up | 2017-08-05T14:20:26.000000 | -    | 
| 44 | nova-cert  | ha-node2 | internal | enabled | up | 2017-08-05T14:20:27.000000 | -    | 
| 46 | nova-scheduler | ha-node2 | internal | enabled | up | 2017-08-05T14:20:28.000000 | -    | 
| 49 | nova-compute  | ha-node2 | nova  | enabled | up | 2017-08-05T14:19:35.000000 | -    | 
| 53 | nova-compute  | ha-node1 | nova  | enabled | up | 2017-08-05T14:20:05.000000 | -    | 
+----+------------------+----------+----------+---------+-------+----------------------------+-----------------+

新星名單：

[[email protected] ~]# nova list 
+--------------------------------------+------+--------+------------+-------------+----------+ 
| ID         | Name | Status | Task State | Power State | Networks | 
+--------------------------------------+------+--------+------------+-------------+----------+ 
| 20193e58-2c5b-44c6-a98f-a44e2001934f | vm1 | ERROR | -   | NOSTATE  |   |

而且新星顯示實例：

[[email protected] ~]# nova show 20193e58-2c5b-44c6-a98f-a44e2001934f 
+--------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 
| Property        | Value                                                  | 
+--------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 
| OS-DCF:diskConfig     | AUTO                                                  | 
| OS-EXT-AZ:availability_zone   | nova                                                  | 
| OS-EXT-SRV-ATTR:host     | -                                                   | 
| OS-EXT-SRV-ATTR:hostname    | vm1                                                  | 
| OS-EXT-SRV-ATTR:hypervisor_hostname | -                                                   | 
| OS-EXT-SRV-ATTR:instance_name  | instance-00000003                                               | 
| OS-EXT-SRV-ATTR:kernel_id   |                                                   | 
| OS-EXT-SRV-ATTR:launch_index   | 0                                                   | 
| OS-EXT-SRV-ATTR:ramdisk_id   |                                                   | 
| OS-EXT-SRV-ATTR:reservation_id  | r-jct8kkcq                                                 | 
| OS-EXT-SRV-ATTR:root_device_name  | /dev/vda                                                 | 
| OS-EXT-SRV-ATTR:user_data   | -                                                   | 
| OS-EXT-STS:power_state    | 0                                                   | 
| OS-EXT-STS:task_state    | -                                                   | 
| OS-EXT-STS:vm_state     | error                                                  | 
| OS-SRV-USG:launched_at    | -                                                   | 
| OS-SRV-USG:terminated_at    | -                                                   | 
| accessIPv4       |                                                   | 
| accessIPv6       |                                                   | 
| config_drive       |                                                   | 
| created        | 2017-08-05T14:17:54Z                                              | 
| description       | vm1                                                  | 
| fault        | {"message": "No valid host was found. There are not enough hosts available.", "code": 500, "details": " File \"/usr/lib/python2.7/site-packages/nova/conductor/manager.py\", line 496, in build_instances | 
|          |  context, request_spec, filter_properties)                                        | 
|          | File \"/usr/lib/python2.7/site-packages/nova/conductor/manager.py\", line 567, in _schedule_instances                         | 
|          |  hosts = self.scheduler_client.select_destinations(context, spec_obj)                                 | 
|          | File \"/usr/lib/python2.7/site-packages/nova/scheduler/utils.py\", line 370, in wrapped                             | 
|          |  return func(*args, **kwargs)                                           | 
|          | File \"/usr/lib/python2.7/site-packages/nova/scheduler/client/__init__.py\", line 51, in select_destinations                        | 
|          |  return self.queryclient.select_destinations(context, spec_obj)                                   | 
|          | File \"/usr/lib/python2.7/site-packages/nova/scheduler/client/__init__.py\", line 37, in __run_method                         | 
|          |  return getattr(self.instance, __name)(*args, **kwargs)                                     | 
|          | File \"/usr/lib/python2.7/site-packages/nova/scheduler/client/query.py\", line 32, in select_destinations                        | 
|          |  return self.scheduler_rpcapi.select_destinations(context, spec_obj)                                 | 
|          | File \"/usr/lib/python2.7/site-packages/nova/scheduler/rpcapi.py\", line 126, in select_destinations                          | 
|          |  return cctxt.call(ctxt, 'select_destinations', **msg_args)                                    | 
|          | File \"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/client.py\", line 169, in call                            | 
|          |  retry=self.retry)                                              | 
|          | File \"/usr/lib/python2.7/site-packages/oslo_messaging/transport.py\", line 97, in _send                             | 
|          |  timeout=timeout, retry=retry)                                           | 
|          | File \"/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py\", line 464, in send                          | 
|          |  retry=retry)                                               | 
|          | File \"/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py\", line 455, in _send                          | 
|          |  raise result                                               | 
|          | ", "created": "2017-08-05T14:18:14Z"}                                          | 
| flavor        | m1.tiny (1)                                                | 
| hostId        |                                                   | 
| host_status       |                                                   | 
| id         | 20193e58-2c5b-44c6-a98f-a44e2001934f                                          | 
| image        | cirros-0.3.4-x86_64 (202778cd-6b32-4486-9444-c167089d9082)                                     | 
| key_name        | -                                                   | 
| locked        | False                                                  | 
| metadata        | {}                                                   | 
| name         | vm1                                                  | 
| os-extended-volumes:volumes_attached | []                                                   | 
| status        | ERROR                                                  | 
| tags         | []                                                   | 
| tenant_id       | 0d5998f2f7ec4c4892a32e06bafb19df                                           | 
| updated        | 2017-08-05T14:18:16Z                                              | 
| user_id        | 2a5fa182fb1b459980db09cd1572850e                                           | 
+--------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

EDIT 2

在/var/log/nova/有用的信息nova-compute.log：

...... 
2017-08-05 22:17:42.669 103174 INFO nova.compute.resource_tracker [req-60a062ce-4b3d-4cb7-863e-2f9bba0bc6ec - - - - -] Compute_service record updated for ha-node1:ha-node1 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [req-7dded91f-7497-4d20-ba89-69f867a2a8fb 2a5fa182fb1b459980db09cd1572850e 0d5998f2f7ec4c4892a32e06bafb19df - - -] [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] Instance failed to spawn 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] Traceback (most recent call last): 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2078, in _build_resources 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  yield resources 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 1920, in _build_and_run_instance 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  block_device_info=block_device_info) 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2584, in spawn 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  admin_pass=admin_password) 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2959, in _create_image 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  fileutils.ensure_tree(libvirt_utils.get_instance_path(instance)) 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib/python2.7/site-packages/oslo_utils/fileutils.py", line 40, in ensure_tree 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  os.makedirs(path, mode) 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] File "/usr/lib64/python2.7/os.py", line 157, in makedirs 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f]  mkdir(name, mode) 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] OSError: [Errno 13] Permission denied: '/var/lib/nova/instances/20193e58-2c5b-44c6-a98f-a44e2001934f' 
2017-08-05 22:18:03.357 103174 ERROR nova.compute.manager [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] 
2017-08-05 22:18:11.563 103174 INFO nova.compute.manager [req-7dded91f-7497-4d20-ba89-69f867a2a8fb 2a5fa182fb1b459980db09cd1572850e 0d5998f2f7ec4c4892a32e06bafb19df - - -] [instance: 20193e58-2c5b-44c6-a98f-a44e2001934f] Terminating instance 
....

來源

2017-08-04 aircraft

你應該檢查新星調度日誌，看看是否有任何相關的信息有可能啓動。如果您尚未啓用調試日誌記錄，請重新啓動調度程序，然後重複實驗。資源可用性問題（RAM，磁盤空間）以及新配置錯誤（例如，您試圖啓動kvm guest虛擬機，但您的主機不支持硬件加速虛擬化）可能導致「無效主機」錯誤。 – larsks

首先，你需要檢查「新星服務列表」或「OpenStack計算服務的輸出清單」。它應該至少顯示一個「nova-compute」服務，狀態爲「Up」，狀態爲「enabled」。

如果上述情況良好，則計算節點與調度程序正常通信。如果沒有，那麼你需要檢查nova-scheduler日誌。

nova-scheduler具有一系列過濾器，如內存過濾器，CPU過濾器，聚合過濾器，它適用於根據您選擇的過濾器過濾主機。即如果您選擇16GB內存的風格，則調度程序將過濾（內存過濾器）具有可用內存的計算主機。在完成所有過濾之後，調度程序將嘗試在已過濾的主機上啓動實例，如果失敗，它將嘗試在另一個主機上。默認的嘗試次數是3.所有這些都可以在調度程序日誌中看到。這會給你一個清楚的想法，看看哪裏出了問題。

您還需要檢查'nova show'輸出。如果您可以看到「OS-EXT-SRV-ATTR：hypervisor_hostname」中存在的計算主機，那麼我們可以理解調度程序已成功地分配計算主機，並且計算主機出了問題。在這種情況下，您需要檢查該虛擬機管理程序的nova-compute日誌。

來源

2017-08-05 05:23:58

最後我發現我安裝/var/lib/nova/到NFS目錄/mnt/sdb/var/lib/nova/，但/mnt/sdb/var/lib/nova/權限爲root:root，所以我改爲nova:nova（同向/var/lib/nova/）。

命令：

chown -R nova:nova nova

來源

2017-08-05 16:17:15 aircraft

NoValidHost：找不到有效的主機。沒有足夠的可用主機

回答

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