For those trying to debug SSVM networking, the following screenshots should help narrow down the issue. These screenshots are from a Apache CloudStack 4.3.0 environment with XenServer hypervisor hosts. Each XenServer hosts has 4 physical network interfaces labeled as below:
- NIC0 – MGMT
- NIC1 – STORAGE (NOTE: Storage is unused in my setup)
- NIC2 – GUEST
- NIC3 – PUBLIC
This can be verified using XenCenter.
Continue reading CloudStack SSVM Network Topology with XenServer
A Shared Network in CloudStack can be used to assign public IPs to guest VM instances instead of internal private IPs. A Guest VM with a routable public IP is directly reachable from the Internet without using any NAT services. Services providers usually create a one or more shared networks with public subnets to provide VPS/shared hosting services for their customers. Please also see earlier post on CloudStack Shared Networks.
For guest instances which are on a VLAN based Isolated Network, the CloudStack managed virtual router (VR) provides NAT/SNAT and firewall services. Users can modify the Network ACLs directly from the CloudStack UI. Virtual routers however, cannot be used as firewall on shared networks as they are directly accessible from the Internet.
So what options are available to provide firewall services in shared networks?
Continue reading CloudStack Advanced Zone With Security Groups
Sensational title but an apt one for this blog post as it seems to be frequently asked question on the #cloudstack IRC channel and on the mailing lists. 🙂
Below are a few troubleshooting steps to check whats going wrong with your network…
Continue reading Internet Not Working On CloudStack VMs