This form logs you into your management portal account. To access your help desk account, click here and use the form to the right of the news.
This form logs you into your management portal account. To access your help desk account, click here and use the form to the right of the news.
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Steadfast Cloud Platform - Load Balancing
Posted by Marc Schulz, Last modified by Marc Schulz on 06 September 2011 03:49 PM
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What is Load Balancing? Load Balancing allows for you to spread connections for various applications between multiple VM’s. This allows you to add additional infrastructure redundancy and capacity between VM’s on different Hypervisors. How can I enable and configure Load Balancing? For a Cluster Load Balancing configuration: 1. Go to your Control Panel’s Load Balancers menu 2. Click Add a balancer button 3. On the page that follows, fill in the form that appears: Cluster Configuration Port - specify the port for this load balancer to run on (e.g. 80,21,22 etc.) Load Balancer Instance - Label — give a name for your load balancer instance - Hostname — specify a host name that will identify your load balancer - Port Speed — use the slider to set a port speed or tick the Unlimited box if required Load Balancer Type - Choose the Cluster option — cluster Cluster Nodes This is where you add and configure the nodes in this load balancing cluster. A node is a combination of a VM and an IP address. Virtual Machines — select a virtual machine from the drop-down box. 4. Click Save. For auto-scaling load balancing cluster: 1. Go to your Control Panel’s Load Balancers menu 2. Click Add a balancer button 3. On the page that follows, fill in the form that appears: Cluster Configuration Port - specify the port for this load balancer to run on (e.g. 80,21,22 etc.) Load Balancer Instance - Label — give a name for your load balancer instance - Hostname — specify a host name that will identify your load balancer - Port Speed — use the slider to set a port speed or tick the Unlimited box if required Load Balancer Type - Choose the Cluster option — auto-scaling Cluster Node Template These settings configure the nodes that will be added to your cluster. - Image template - choose a template from the drop-down box: nodes will be built on this template - Min node amount — the minimum number of nodes in this cluster - Max node amount — the maximum number of nodes in this cluster Example: if you set Min node amount = 2 and Max node amount = 5, then the system will scale out the cluster up to 5 nodes, and scale in to 2 nodes if required. Cluster Node Parameters These are the settings for each node of a cluster. Each node added to a cluster will have the following parameters: - Memory — set the amount of memory allocated per node in Mb - CPUs — set the amount of CPUs which will form each node - CPU Priority — specify CPU priority. For more info on CPU priority, refer to Create VMs section - Rate Limit — set the port speed for a node Autoscale Out Parameters Set the rules for adding more nodes to your autoscaling cluster. The system will monitor CPU and free RAM of the nodes. - Specify the period of monitoring (e.g. 10 minutes) - Value (e.g. CPU usage is above 85%; free RAM is less then 10 MB) - Number of nodes to be added to the cluster if the rule is met (e.g. add 1 more VMs). Note: If the rule is met, the system will add nodes until the limit set in the Max node amount field is reached. In case both rules are met simultaneously (if you set the same monitoring period for both CPU and RAM), the system will add only one node. Autoscale In Parameters Set the rules for removing nodes from your autoscaling cluster. The system will monitor CPU and free RAM of the nodes. - Specify the period of monitoring (e.g. 20 minutes) - Value (e.g. CPU usage is less then 55%; free RAM is more then 50 MB) - Number of nodes to be removed from the cluster if the rule is met (e.g. remove 1 more VMs). Note: If the rule is met, the system will remove nodes until the limit set in the Min node amount field is reached. In case both rules are met simultaneously (if you set the same monitoring period for both CPU and RAM), the system will remove only one node. 4) Click Save. | |
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