我正在 OpenStack 集群中进行实时迁移测试。（Mitaka）。我在 2 个计算主机上部署了 3 个虚拟机。启动集群时，nova-compute 状态为 UP。但过了一段时间，虽然状态为 Enabled，但状态为 down，因此我的虚拟机会中断。
root@ctl:/var/log/nova# openstack compute service list
+----+------------------+-------------------------------------------------------+----------+---------+-------+----------------------------+
| Id | Binary | Host | Zone | Status | State | Updated At |
+----+------------------+-------------------------------------------------------+----------+---------+-------+----------------------------+
| 1 | nova-cert | ctl.livemigration.kkprojects-pg0.clemson.cloudlab.us | internal | enabled | up | 2023-02-18T21:17:06.000000 |
| 2 | nova-consoleauth | ctl.livemigration.kkprojects-pg0.clemson.cloudlab.us | internal | enabled | up | 2023-02-18T21:17:06.000000 |
| 3 | nova-scheduler | ctl.livemigration.kkprojects-pg0.clemson.cloudlab.us | internal | enabled | up | 2023-02-18T21:17:09.000000 |
| 7 | nova-conductor | ctl.livemigration.kkprojects-pg0.clemson.cloudlab.us | internal | enabled | up | 2023-02-18T21:17:08.000000 |
| 11 | nova-compute | cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us | nova | enabled | down | 2023-02-18T20:14:16.000000 |
| 12 | nova-compute | cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us | nova | enabled | down | 2023-02-18T20:14:21.000000 |
+----+------------------+-------------------------------------------------------+----------+---------+-------+----------------------------+
检查计算节点上的 Nova Computes 后，我发现它们已启用
root@cp-2:/etc/selinux# hostname
cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us
root@cp-2:/etc/selinux# service nova-compute status
● nova-compute.service - OpenStack Compute
Loaded: loaded (/lib/systemd/system/nova-compute.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2023-02-18 14:20:22 EST; 1h 58min ago
Main PID: 9926 (nova-compute)
CGroup: /system.slice/nova-compute.service
└─9926 /usr/bin/python /usr/bin/nova-compute --config-file=/etc/nova/nova.conf --config-file=/etc/nova/nova-compute.conf --log-file=/var/log/nova/nova-compute.log
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19697]: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19697]: pam_unix(sudo:session): session closed for user root
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19703]: nova : TTY=unknown ; PWD=/var/lib/nova ; USER=root ; COMMAND=/usr/bin/nova-rootwrap /etc/nova/rootwrap.conf o
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19703]: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us ovs-vsctl[19706]: ovs|00001|vsctl|INFO|Called as /usr/bin/ovs-vsctl --timeout=120 -- --if-exists del-port qvo8e68056c-a0 -- ad
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19703]: pam_unix(sudo:session): session closed for user root
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19707]: nova : TTY=unknown ; PWD=/var/lib/nova ; USER=root ; COMMAND=/usr/bin/nova-rootwrap /etc/nova/rootwrap.conf i
Feb 18 14:59:07 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[19707]: pam_unix(sudo:session): session opened for user root by (uid=0)
Feb 18 15:00:25 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[20242]: nova : TTY=unknown ; PWD=/var/lib/nova ; USER=root ; COMMAND=/usr/bin/nova-rootwrap /etc/nova/rootwrap.conf t
Feb 18 15:00:25 cp-2.livemigration.kkprojects-pg0.clemson.cloudlab.us sudo[20242]: pam_unix(sudo:session): session opened for user root by (uid=0)
root@cp-1:/var/log/nova# hostname
cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us
root@cp-1:/var/log/nova# service nova-compute status
● nova-compute.service - OpenStack Compute
Loaded: loaded (/lib/systemd/system/nova-compute.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2023-02-18 15:37:11 EST; 42min ago
Process: 28530 ExecStartPre=/bin/chown nova:nova /var/lock/nova /var/log/nova /var/lib/nova (code=exited, status=0/SUCCESS)
Process: 28527 ExecStartPre=/bin/mkdir -p /var/lock/nova /var/log/nova /var/lib/nova (code=exited, status=0/SUCCESS)
Main PID: 28533 (nova-compute)
CGroup: /system.slice/nova-compute.service
└─28533 /usr/bin/python /usr/bin/nova-compute --config-file=/etc/nova/nova.conf --config-file=/etc/nova/nova-compute.conf --log-file=/var/log/nova/nova-compute.log
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.281 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.283 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.283 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.285 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.287 28533 DEBUG nova.virt.libvirt.vif [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: s=<?>,shutdown_terminate=False,system_metadata=<?>,tags=<?>,task_state=None,terminated_at=None,updated_at
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.289 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.291 28533 DEBUG nova.compute.manager [req-df86d8a0-a7ff-480d-b157-39ae745850fd - - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.346 28533 WARNING nova.compute.monitors [req-df86d8a0-a7ff-480d-b157-39ae745850fd - -
Feb 18 15:37:15 cp-1.livemigration.kkprojects-pg0.clemson.cloudlab.us nova-compute[28533]: 2023-02-18 15:37:15.347 28533 INFO nova.compute.resource_tracker [req-df86d8a0-a7ff-480d-b157-39ae745850f
lines 1-19/19 (END)
答案1
我同意“eblock”关于 rabbitmq 问题或一般网络问题的看法。如果 nova-compute 已启用并正在运行，但无法与控制器可靠地通信，它将显示为“关闭”。有时重新启动 nova-compute 服务将解决问题，并且不会影响任何正在运行的虚拟机。
检查主机上的 nova-compute.log，查找超时、连接丢失等迹象。此外，查看控制器上的 rabbitmq 日志。希望对您有所帮助。