SysEleven Stack Compute Service


SysEleven Stacks Compute Service is built on the OpenStack Nova project.

It manages the life-cycle of compute instances in your environment. Its responsibilities include spawning, scheduling and decommissioning of virtual machines on demand.

You can manage your compute instance both via our public OpenStack API endpoints, as well as using the Dashboard.

Instance types

Currently, we provide you with four different instance types.

Name API Name Memory VCPUs Storage* Network Performance
M1 Micro m1.micro 2GB 1 50GB basic
M1 Tiny m1.tiny 4GB 1 50GB basic
M1 Small m1.small 8GB 2 50GB basic
M1 Medium m1.medium 16GB 4 50GB intermediate
M1 Large m1.large 32GB 8 50GB high


Can I allocate a fixed IP to a compute instance?

Normally a fixed IP shouldn't play a big role in a cloud setup, since the infrastructure might change a lot. If you need a fixed IP, you can assign a port from our networking service as a fixed IP to our compute instance. Here is an example which shows how to use the orchestration service to fetch a fixed IP address to use in a template:

    type: OS::Neutron::Port
      network_id: { get_resource: management_net }
        - ip_address:

My compute instance was created, but is not accessible via SSH/HTTP etc.

By default all compute instances of are using the "default" security group. It's settings do not allow any other packets, except of ICMP in order to be able to ping your compute instance. Any other ports needed by a given instance need to be opened by adding a rule to the security group your instance uses (i.e., SSH or HTTPS). Here is an example that shows how you can use a heat template to allow incoming HTTP/HTTPS traffic via your security group:

    type: OS::Neutron::SecurityGroup
      description: allow incoming webtraffic from anywhere.
      name: allow webtraffic
        - { direction: ingress, remote_ip_prefix:, port_range_min: 80, port_range_max: 80, protocol: tcp }
        - { direction: ingress, remote_ip_prefix:, port_range_min: 443, port_range_max: 443, protocol: tcp }

This security group can now be connected to a port of your network:

    type: OS::Neutron::Port
      security_groups: [ get_resource: allow_webtraffic, default ]
      network_id: { get_resource: example_net}

The security group "default" is added in this example, since this group is taking care of allowing outbound traffic.