CenturyLink Cloud provides several tools to enable customers to maximize the benefits of cloud computing, this article will outline some of the controls available to minimize cost. These tools are: pausing, archiving, scheduled tasks, autoscale policies, time-to-live server settings and dashboard estimates.
- CenturyLink Cloud Customers
- Understanding VM Deployment Options & Power States
- Creating a Scheduled Task
- Creating & Applying Autoscale Policies
Pausing is the act of suspending a virtual machine; virtual machines in a paused state are not billed for compute (RAM,CPU) usage- only storage consumption and licensing costs. Individual machines or entire groups can easily be paused through our Control Portal. To do so, simply select the appropriate group and use the "pause" button located on the black control bar.
Once you have selected the pause button, a selection box will appear which will allow you to choose one or all of the servers to be paused. Simple select the servers you wish to pause and select the "pause" button.
Pausing servers is an effective way to temporarily reduce server costs; however, certain servers may no longer be needed in production but are needed either for reference or are planned for production usage at a later date. These servers can be "Archived" which suspends the virtual machine, and moves the server to a significantly cheaper storage tier. In the archive state, a customer pays only for the archival storage consumed by the machine, at a reduced rate- no compute or licensing costs are levied.
Despite being archived, it is still an easily-executed and timely task to bring servers out of an archival state and back into production. To archive a server, simply select the "Archive" option from the actions menu. Note that selecting "Archive" on a group will archive the entire group of servers, though there will be a prompt to ensure this is the desired action before execution.
Both tasks, pausing and archiving, can be scheduled on an individual or group level. To do so, simply select the "Schedules" tab located on the Settings page on either a group or individual VM. You will then be able to setup the scheduled task (pause, power on, reboot, shutdown, archive, delete, create snapshot, delete snapshot), the desired time for the operation, and the expiration date. You can also set schedules to "propagate" through child groups in a hierarchical fashion to control, for example, and entire development stack. Scheduling pausing of servers is a great way to reduce resource utilization during off-hours for non-critical servers, simply pause your servers at night or over the weekend, and schedule them to power on at the start of the work week.
The CenturyLink Cloud platform supports both vertical Autoscale of CPU capacity for servers as well as horizontal Autoscale of servers. This makes it possible to scale servers up and down (vertical) or out and in (horizontal) based on utilization, ensuring optimal deployment of resources for cloud environments under a variety of conditions.
For vertical Autoscale, servers that exceed a user-defined CPU utilization threshold will instantly scale up, and servers that go below a user-defined CPU utilization threshold will scale down (and reboot) during a user-defined window. In the case of horizontal Autoscale, groups of servers that exceed a user-defined CPU/RAM utilization threshold will scale out by powering on one or more additional servers in the group, and groups of servers that go below a user-defined CPU/RAM utilization threshold will scale in by powering off one or more servers in the group.
Autoscale makes it possible for a server or group of servers to self-regulate and deliver only the capacity it needs at any given time. This offers users two benefits: cost savings, and a reduction in administrative overhead.
Instead of requiring system administrators to closely monitor and scale servers based on changes in utilization, you can create policies that add and remove capacity automatically. This ensures that you don't have unnecessary CPUs allocated or additional servers powered on unless you need them.
Time to Live
When creating a new server, the CenturyLink Cloud Control user interface includes a quick and easy way to put a time limit on the duration of the server's existence. By setting the "Time to Live" policy, users can be assured that their server will not accrue charges beyond a specific length of time. This feature is especially helpful during demonstrations and illustrations of the platform's capability.
At the CenturyLink Cloud Dashboard and at various places within the CenturyLink Cloud Control interface, users are presented with an estimate of what their monthly charges will look like at the current rate of consumption. This estimate is continually updated as the user considers different configuration options, and instant feedback is given when considering a change. This makes it easy for CenturyLink Cloud users to instantaneously understand the financial impact of any proposed infrastructure modification.
The CenturyLink Cloud platform includes numerous useful tools for helping users keep their costs below a budgeted threshold.
- Pausing servers is a quick way to remove them from the CPU and RAM metering.
- Archiving further reduces the cost of the cloud server by moving the device to a lower cost storage tier.
- Scheduled Tasks allow users to define custom, time-oriented policies against which cost management actions can occur.
- Autoscale Policies can be used to right-size infrastructure to match actual demand patterns with resource deployment.
- Time to Live durations can be applied to servers with a known period of utility.
- Estimate Engine is a continually running feature that prominently displays the cost impact each infrastructure element on an easy-to-understand, monthly forecasted basis.