No valid host was found. There are not enough hosts available-----openstack建虚拟机直

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目录
0 C+ e/ D& E; l9 V& y0 N3 zNo valid host was found. There are not enough hosts available-----openstack建虚拟机直接报错
" h, u0 @' v+ p5 S一、问题现象：
! W3 Z% C) w" A4 D8 w; C  Z" d二、解决思路：
- L4 {; K5 R& i/ |2 \1、查看计算节点的nova-compute 日志,发现如下日志：
4 E* u: F' m' b2、查看nova-scheduler.log
3、进数据查看数据库表
0 Z! f3 s- k5 H* u! }0 C" [4、尝试将compute节点从nova service-list中删除，并重新加入到集群中
6 L, ~4 }# U( r6 u6 S; X5、再次进入数据库，执行 select * from resource_providers;
, \8 y( r$ F4 y) `# a- {2 t6、查找官网，找到了操作 resource_providers的openstack命令,执行如下操作。
* E( Y4 J2 d9 b  L! o一、问题现象：
( u2 R& Z% A, y( w8 u; \本次环境中只有一个计算节点，创建虚拟机直接报错，使用nova show 看到报错如下图：
* E5 K; e: ~4 e5 G* W" x/ |9 s"message": "No valid host was found. There are not enough hosts available.", "code": 500

: r3 W+ G9 `. b+ F: U3 L* S二、解决思路：
1、查看计算节点的nova-compute 日志,发现如下日志：
4 k7 l& O; W8 C% L8 [; [$ b2019-11-21 19:47:09.484 8 ERROR nova.scheduler.client.report [req-cbc37e88-16be-4b5b-be98-d889cd1b01dc - - - - -] [req-a5a6d438-3f63-49aa-9dd2-98d061b122b4] Failed to create resource provider record in placement API for UUID d878a164-6499-43d4-9772-b77107a1bb8c. Got 409: {"errors": [
' _) a9 M/ l( ^. f! C8 @' S{"status": 409, "request_id": "req-a5a6d438-3f63-49aa-9dd2-98d061b122b4", "detail": "There was a conflict when trying to complete your request.\n\n Conflicting resource provider name: compute1 already exists. ", "title": "Conflict"}
2019-11-21 19:47:09.485 8 ERROR nova.compute.manager [req-cbc37e88-16be-4b5b-be98-d889cd1b01dc - - - - -] Error updating resources for node compute1.: ResourceProviderCreationFailed: Failed to create resource provider compute1
发现ResourceProviderCreationFailed: Failed to create resource provider compute1 ，发现resource Provider 创建失败。怀疑数据库resource provider 表没有建出来，继续查看nova-nova-scheduler.log。
2、查看nova-scheduler.log
2019-11-21 20:18:43.360 29 INFO nova.filters [req-448bd5fa-ddc8-45d9-9b8b-a63bdb691335 e0111848d3904a7288df61cac5163f4f 9be97009f556459cb1814232dbedb4a3 - default default] Filter RetryFilter returned 0 hosts
) a6 F) y' L: ^8 y, A0 v, X- y2019-11-21 20:18:43.362 29 INFO nova.filters [req-448bd5fa-ddc8-45d9-9b8b-a63bdb691335 e0111848d3904a7288df61cac5163f4f 9be97009f556459cb1814232dbedb4a3 - default default] Filtering removed all hosts for the request with instance ID 'c9542c1c-191e-49f2-815a-fdcacc081af6'. Filter results: ['RetryFilter: (start: 0, end: 0)']
3、进数据查看数据库表
mysql> use nova_api;
# I3 a% I: s5 o( Rmysql[nova_api] >  select * from resource_providers;
+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
| created_at          | updated_at          | id | uuid                                 | name     | generation | can_host | root_provider_id | parent_provider_id |
& Y: g9 M0 d8 ~! _1 L" D& s+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
. d' s; r% U- u* n| 2019-11-21 06:17:39 | 2019-11-21 06:17:41 |  3 | 16d1bd53-7919-4fef-9a11-a0e98c149823 | compute1 |          1 |     NULL |                3 |               NULL |
6 W. b: q# k* U  O0 L+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
1 row in set (0.00 sec)
2 c: Y) z1 x$ e) J' c3 x发现有数据。重新创建虚拟机，依然会发生报错，
0 C: i, J. q2 H5 i, q  u4、尝试将compute节点从nova service-list中删除，并重新加入到集群中
# 停掉compute节点的nova-compute 服务
nova service-delete <计算节点的uuid>
9 {( o  P/ l/ L4 P+ B0 v# 开启计算节点的nova-compute服务，让计算节点重新注册
/ m- u5 m# I8 O尝试创建虚拟机，发现还是报错。返回去，查看nova-compute的日志发现 There was a conflict when trying to complete your request.\n\n Conflicting resource provider name: compute1 already exists. 。提示矛盾。
5、再次进入数据库，执行 select * from resource_providers;
, w2 X( D. c: I! v7 G1 ymysql> use nova_api;
5 {  x% A8 ^7 L3 P% I3 L) T! imysql[nova_api] >  select * from resource_providers;
+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
% j- R, O2 d7 i, a' T. Y| created_at          | updated_at          | id | uuid                                 | name     | generation | can_host | root_provider_id | parent_provider_id |
, Z3 X# K- Q  U& {) G4 X+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
| 2019-11-21 06:17:39 | 2019-11-21 06:17:41 |  3 | 16d1bd53-7919-4fef-9a11-a0e98c149823 | compute1 |          1 |     NULL |                3 |               NULL |
+---------------------+---------------------+----+--------------------------------------+----------+------------+----------+------------------+--------------------+
  I  G# l8 ~/ k7 }2 o1 row in set (0.00 sec)
  {, M- y- n. r发现新注册的计算节点，但是resource_providers的uuid 没有发生变化，怀疑是注册compute节点的时候，并没有更新resource_providers，尝试删除resource_providers;


, U2 h& }. Z6 H: y) V- f% u/ t. R) [4 O
查找官网，找到了操作 resource_providers的openstack命令,执行如下操作。
相关文档：https://docs.openstack.org/osc-placement/latest/cli/index.html
. f5 v6 Y! f1 w6 ^相关软件包：https://cbs.centos.org/kojifiles/packages/python-osc-placement/1.3.0/1.el7/noarch/python2-osc-placement-1.3.0-1.el7.noarch.rpm
- v$ L  ?+ I. C- C# 安装osc-placement 软件包，生成命令行工具
2 J: j  H9 P, E, b( U# 执行如下命令：
export OS_PLACEMENT_API_VERSION=1.10
openstack allocation candidate list --resource VCPU=1
+ r! u5 S) A8 W" ^# 查看当前resource provider
, w7 |  Z0 P: c/ g, j) u2 f[root@control1 ~]# openstack resource provider  list
+--------------------------------------+----------+------------+
6 f+ c2 Q6 F& r" b/ \0 L! C, x& ?| uuid                                 | name     | generation |
6 Y1 A* Q0 W; o6 p: [+--------------------------------------+----------+------------+
| 16d1bd53-7919-4fef-9a11-a0e98c149823 | compute1 |          2 |
+--------------------------------------+----------+------------+
# 停止计算节点nova-compute服务
# 从service 中删除compute1
nova service-delete  <uuid>
0 s- i. U7 I7 g5 S# 删除当前resource provider
& Q( q/ Y6 H2 a5 Eopenstack resource provider  delete 16d1bd53-7919-4fef-9a11-a0e98c149823
5 U1 o5 _) [- [" u. [2 j5 P# 重启nova-compute服务，让其自动注册
2 Q$ \+ r& T5 I" N7 E+ w9 K# 查看当前resource provider
[root@control1 ~]# openstack resource provider  list
+--------------------------------------+----------+------------+
8 B, L# l) h0 Z6 S9 F| uuid                                 | name     | generation |
' [' j" i. I# ~  ~+--------------------------------------+----------+------------+
' g" N' s4 u  B/ w, [| b32cd7b5-26c6-4998-97f1-79fa2315871b | compute1 |          2 |
+--------------------------------------+----------+------------+
  P( p, @/ s. I  v8 W# # 执行如下命令，验证是否更新了数据
, V, X4 X) M8 |$ |. J/ _5 hexport OS_PLACEMENT_API_VERSION=1.10
openstack allocation candidate list --resource VCPU=1
. Z1 V. B% y4 n1 \执行创建云主机，云主机成功创建。