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I had the same error. In my experience, controller and compute nodes were not correctly configured with RPC backend (RabbitMQ) and database backend (MySQL). I am pasting an example configure here:

Messaging

rpc_backend = nova.rpc.impl_kombu rabbit_host = 10.251.0.1

Auth

auth_strategy = keystone [keystone_authtoken] auth_host = 10.251.0.1 auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = nova admin_password = password auth_version = v2.0 signing_dir = /tmp/keystone-signing-nova

I had the same error. In my experience, controller and compute nodes were not correctly configured with RPC backend (RabbitMQ) and database backend (MySQL). I am pasting an example configure here:

Messaging

# Messaging

rpc_backend = nova.rpc.impl_kombu rabbit_host = 10.251.0.1

Auth

# Auth

auth_strategy = keystone [keystone_authtoken] auth_host = 10.251.0.1 auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = nova admin_password = password auth_version = v2.0 signing_dir = /tmp/keystone-signing-nova

I had the same error. error with Havana. In my experience, controller and compute nodes were not correctly configured with RPC backend (RabbitMQ) and database backend (MySQL). I am pasting an example configure here:

# Messaging 
Messaging rpc_backend = nova.rpc.impl_kombu rabbit_host = 10.251.0.1

10.251.0.1

# Auth
Auth auth_strategy = keystone [keystone_authtoken] auth_host = 10.251.0.1 auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = nova admin_password = password auth_version = v2.0 signing_dir = /tmp/keystone-signing-nova

/tmp/keystone-signing-nova