why i can launch two 4 vcpu instance but not one 8 vcpu instance?

asked 2018-05-23 04:40:11 -0600

zarzaid gravatar image

Good day everyone, Im new to openstack. i looked tutorial on installing openstack (packstack) and connect the instance with internet following tutorials here: https://www.rdoproject.org/networking/neutron-with-existing-external-network/ (https://www.rdoproject.org/networking...)

I've setup openstack using 1 controller node [2cpu,6gb ram, 100+ gb space] and 2 compute node [4cpu, 8gb ram, 1Tb space][2cpu,6gb ram, 271gb space]. #my controller node does not include as compute node.

My problem is i can't launch an instance with specs higher than 4 vcpu, 4 gb ram, 80gb disk. I want to setup a single instance that combine both my compute nodes with specs of 8vcpu,10gb ram, 1tb space.

However, i can launch two instance with specs of 4 vcpu, 4 gb ram, 80gb (feels weird) but not a single 8vcpu,10gb ram, 1tb space instance. (with error code 500)

Can anyone help me on this?

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