记一次安装OpenStack（Stein）-nova报错问题解决

记一次安装OpenStack（Stein）-nova报错问题解决

1 报错信息

[root@controller ~]# su -s /bin/sh -c "nova-manage api_db sync" nova
An error has occurred:
Traceback (most recent call last):File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 2419, in mainret = fn(*fn_args, **fn_kwargs)File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 897, in syncresult = migration.db_sync(version2, database='placement')File "/usr/lib/python2.7/site-packages/nova/db/migration.py", line 26, in db_syncreturn IMPL.db_sync(version=version, database=database, context=context)File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/migration.py", line 57, in db_synccurrent_version = db_version(database, context=context)File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/migration.py", line 88, in db_version_("Upgrade DB using Essex release first."))
NovaException: Upgrade DB using Essex release first.

ChatGPT搜索：这个错误表明您的OpenStack Nova数据库版本太旧，无法直接升级到当前版本。

2 解决方法：

考虑升级nova软件版本，尝试使用train版本

2.1 更新软件源，注释掉老版本安装源，启用新版本安装源。

[root@controller ~]# cat /etc/yum.repos.d/openstack.repo 
#...
[cloud]
name=CentOS-$releasever - Cloud
#baseurl=https://mirrors.aliyun.com/centos/7.9.2009/cloud/x86_64/openstack-stein/
baseurl=https://mirrors.aliyun.com/centos/7.9.2009/cloud/x86_64/openstack-train/
gpgcheck=0

2.2 清除旧缓存，更新新版本软件安装源

[root@controller ~]# yum clean all && yum makecache

2.3 卸载旧版本nova，重新安装新版本

[root@controller ~]# yum remove openstack-nova-api openstack-nova-conductor openstack-nova-novncproxy openstack-nova-scheduler -y[root@controller ~]# yum install openstack-nova-api openstack-nova-conductor openstack-nova-novncproxy openstack-nova-scheduler -y

2.4 重新执行命令

[root@controller ~]# su -s /bin/sh -c "nova-manage api_db sync" nova
[root@controller ~]# su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova
[root@controller ~]# su -s /bin/sh -c "nova-manage cell_v2 create_cell --name cell1 --verbose" nova
9c5e3b8f-59af-4e84-a24f-3c4e9c630d65
#以下命令报错可忽略
[root@controller ~]# su -s /bin/sh -c "nova-manage db sync" nova  
/usr/lib/python2.7/site-packages/pymysql/cursors.py:170: Warning: (1831, u'Duplicate index `block_device_mapping_instance_uuid_virtual_name_device_name_idx`. This is deprecated and will be disallowed in a future release')result = self._query(query)
/usr/lib/python2.7/site-packages/pymysql/cursors.py:170: Warning: (1831, u'Duplicate index `uniq_instances0uuid`. This is deprecated and will be disallowed in a future release')result = self._query(query)

3 启动服务并设置开机自启

[root@controller ~]# systemctl enable --now openstack-nova-api.service
[root@controller ~]# systemctl enable --now openstack-nova-conductor.service
[root@controller ~]# systemctl enable --now openstack-nova-novncproxy.service
[root@controller ~]# systemctl enable --now openstack-nova-scheduler.service

至此继续安装其余组件。