Failed to create openStack instance

Question

I'm new to open stack , and when I try to create instance it gives me this error:

[Error : Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instance 57100c2f-a290-4165-b4c0-ba2202cfb728.]

Answer 1

I had a similar problem, in my compute host i can see in the: journalctl -xfu neutron-linuxbridge-agent

Interface eth12 for physical network flat does not exist. Agent terminated!

My linuxbridge agent service was always restarting.

In this case, i was need to create the virtual devices veth file. My solution was:

1. vim /etc/systemd/network/25-veth-br-vlan-eth12.netdev

[NetDev]
Name=eth12
Kind=veth
[Peer]
Name=br-vlan-veth

2. And adding veth config in netplan file: vim /etc/netplan/00-installer-config.yaml

   ethernets:
       eno1:
         dhcp4: no
         mtu: 1500
       eno2:
         dhcp4: no
         mtu: 1500
       br-vlan-veth: {}
       eth12: {}

3. Apply netplan config:

netplan apply

4. Restart linuxbridge agent service:

systemctl restart neutron-linuxbridge-agent

PS: I needed to create the veth devices in all hosts using linuxbridge agent, like controller nodes and compute nodes.

If you are using OVS instead linuxbridge, this solution don't make sense to you, but can help someone that use linuxbridge.

Answer 2

Same here.. We managed to deploy OpenStack through Kolla-Ansible Unfortunately just cannot deploy an instance through Horizon. keep getting this error about the scheduler

Message Exceeded maximum number of retries. Exhausted all hosts available for >retrying build failures for instance 3539a5ba-b4f8-4dea-92a0-618e77d3ee93.

Code 500

Details Traceback (most recent call last): File

"/var/lib/kolla/venv/lib/python3.8/site-packages/nova/conductor/manager.py", line 665, in build_instances raise exception.MaxRetriesExceeded(reason=msg) nova.exception.MaxRetriesExceeded: Exceeded maximum number of retries. >Exhausted all hosts available for retrying build failures for instance >3539a5ba-b4f8-4dea-92a0-618e77d3ee93.

Created Oct. 3, 2021, 7:21 a.m.

But surprisingly the follwoing command seem to work

openstack server create \
--image cirros \
--flavor m1.tiny \
--key-name mykey \
--network demo-net \
demo1

Answer 3

I had this problem and anti-affinity was the problem. I had not enough resources on 2 host servers, totally was enough resources but separate per host no.

/var/log/kolla/nova/nova-conductor.log:2022-10-12 09:10:51.047 18 ERROR nova.scheduler.utils [req-e374e3f1-9c8b-477a-8c21-e84a34adc424 b9b1a508c5ee45ff82dd110fce67c263 b618f643ecc74ee6ab7a92ddcb62fac9 - default default] [instance: 4bcd776a-8848-4d94-a3cf-bc1ef6a72f0e] Error from last host: krpan-node4.iskratel.cloud (node krpan-node4.iskratel.cloud): [u'Traceback (most recent call last):\n', u' File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 2056, in _do_build_and_run_instance\n filter_properties, request_spec)\n', u' File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/manager.py", line 2347, in _build_and_run_instance\n instance_uuid=instance.uuid, reason=six.text_type(e))\n', u'RescheduledException: Build of instance 4bcd776a-8848-4d94-a3cf-bc1ef6a72f0e was re-scheduled: Build of instance 4bcd776a-8848-4d94-a3cf-bc1ef6a72f0e was re-scheduled: Anti-affinity instance group policy was violated.\n']