Most of us have a business requirement to change system passwords regularly and when we do, it usually ends up in a mess. Thankfully, Apache CloudStack has an API that allows you to modify XenServer host passwords without mucking around the database and encryption.
The API to change XenServer host password is updateHostPassword which you can use via CloudMonkey CLI tool. The steps to change the XenServer password would roughly be as below:
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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.
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The recently released Ubuntu 14.04 “Trusty Tahir” LTS release comes with Xen HVM (Hardware-assisted virtualization) support. Previous LTS releases supported the older Xen PV (para-virtualization) mode only.
Phoronix has recently published a comparison between Ubuntu 14.04 Xen PV with Xen HVM virtualisation which seems to suggest that Ubuntu 14.04 with Xen HVM performs better than Xen PV on EC2 cloud. You can read the full article at Ubuntu 14.04 On Amazon EC2: Xen PV vs. HVM
Continue reading “Running Ubuntu 14.04 “Trusty Tahir” on XenServer CloudStack”