mirror of https://github.com/apache/cloudstack.git
CLOUDSTACK-769
This commit is contained in:
radhikap
parent
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<section id="add-loadbalancer-rule-vpc">
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<title>Adding Load Balancing Rules on a VPC</title>
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<para>A &PRODUCT; user or administrator may create load balancing rules that balance traffic
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received at a public IP to one or more VMs that belong to a network tier that provides load
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balancing service in a VPC. A user creates a rule, specifies an algorithm, and assigns the rule
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to a set of VMs within a VPC.</para>
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<orderedlist>
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<listitem>
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<para>Log in to the &PRODUCT; UI as an administrator or end user.</para>
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</listitem>
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<listitem>
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<para>In the left navigation, choose Network.</para>
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</listitem>
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<listitem>
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<para>In the Select view, select VPC.</para>
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<para>All the VPCs that you have created for the account is listed in the page.</para>
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</listitem>
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<listitem>
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<para>Click the Configure button of the VPC to which you want to configure load balancing
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rules.</para>
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<para>The VPC page is displayed where all the tiers you created are listed in a
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diagram.</para>
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</listitem>
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<listitem>
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<para>Click the Settings icon.</para>
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<para>The following options are displayed.</para>
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<itemizedlist>
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<para>In a VPC, you can configure two types of load balancing—external LB and internal LB.
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External LB is nothing but load balancing the traffic received at a public IP of the VPC virtual
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router. The traffic is load balanced within a tier based on your configuration. Supported
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service providers are Citrix NetScaler and VPC virtual router. When you use internal LB service,
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traffic received at a tier is load balanced across different tiers within the VPC. External load
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balancing devices are not supported for internal LB.</para>
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<section id="curent-lb-vpc">
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<title>Load Balancing Within a Tier (External LB)</title>
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<para>A &PRODUCT; user or administrator may create load balancing rules that balance traffic
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received at a public IP to one or more VMs that belong to a network tier that provides load
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balancing service in a VPC. A user creates a rule, specifies an algorithm, and assigns the
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rule to a set of VMs within a VPC.</para>
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<orderedlist>
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<listitem>
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<para>Log in to the &PRODUCT; UI as an administrator or end user.</para>
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</listitem>
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<listitem>
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<para>In the left navigation, choose Network.</para>
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</listitem>
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<listitem>
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<para>In the Select view, select VPC.</para>
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<para>All the VPCs that you have created for the account is listed in the page.</para>
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</listitem>
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<listitem>
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<para>Click the Configure button of the VPC, for which you want to configure load balancing
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rules.</para>
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<para>The VPC page is displayed where all the tiers you created listed in a diagram.</para>
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</listitem>
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<listitem>
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<para>Click the Settings icon.</para>
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<para>For each tier, the following options are displayed:</para>
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<itemizedlist>
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<listitem>
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<para>Internal LB</para>
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</listitem>
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<listitem>
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<para>Public LB IP</para>
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</listitem>
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<listitem>
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<para>Static NAT</para>
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</listitem>
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<listitem>
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<para>Virtual Machines</para>
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</listitem>
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<listitem>
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<para>CIDR</para>
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</listitem>
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</itemizedlist>
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<para>The following router information is displayed:</para>
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<itemizedlist>
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<listitem>
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<para>Private Gateways</para>
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</listitem>
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<listitem>
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<para>Public IP Addresses</para>
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</listitem>
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<listitem>
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<para>Site-to-Site VPNs</para>
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</listitem>
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<listitem>
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<para>Network ACL Lists</para>
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</listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para>In the Router node, select Public IP Addresses.</para>
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<para>The IP Addresses page is displayed.</para>
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</listitem>
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<listitem>
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<para>Click the IP address for which you want to create the rule, then click the
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Configuration tab.</para>
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</listitem>
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<listitem>
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<para>In the Load Balancing node of the diagram, click View All.</para>
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</listitem>
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<listitem>
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<para>Select the tier to which you want to apply the rule.</para>
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</listitem>
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<listitem>
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<para>Specify the following:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis role="bold">Name</emphasis>: A name for the load balancer rule.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Public Port</emphasis>: The port that receives the incoming
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traffic to be balanced.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Private Port</emphasis>: The port that the VMs will use to
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receive the traffic.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Algorithm</emphasis>. Choose the load balancing algorithm
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you want &PRODUCT; to use. &PRODUCT; supports the following well-known
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algorithms:</para>
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<itemizedlist>
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<listitem>
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<para>Round-robin</para>
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</listitem>
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<listitem>
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<para>Least connections</para>
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</listitem>
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<listitem>
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<para>Source</para>
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</listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Stickiness</emphasis>. (Optional) Click Configure and choose
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the algorithm for the stickiness policy. See Sticky Session Policies for Load Balancer
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Rules.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Add VMs</emphasis>: Click Add VMs, then select two or more
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VMs that will divide the load of incoming traffic, and click Apply.</para>
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</listitem>
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</itemizedlist>
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</listitem>
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</orderedlist>
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<para>The new load balancing rule appears in the list. You can repeat these steps to add more
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load balancing rules for this IP address.</para>
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</section>
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<section id="acros-tiers-lb">
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<title>Load Balancing Across Tiers</title>
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<para>&PRODUCT; supports sharing workload across different tiers within your VPC. Assume that
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multiple tiers are set up in your environment, such as Web tier and Application tier. Traffic
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to each tier is balanced on the VPC virtual router on the public side, as explained in <xref
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linkend="add-loadbalancer-rule-vpc"/>. If you want the traffic coming from the Web tier to
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the Application tier to be balanced, use the internal load balancing feature offered by
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&PRODUCT;.</para>
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<section id="vpc-pic">
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<title>How Does Internal LB Work in VPC?</title>
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<para>In this figure, a public LB rule is created for the public IP 72.52.125.10 with public
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port 80 and private port 81. The LB rule, created on the VPC virtual router, is applied on
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the traffic coming from the Internet to the VMs on the Web tier. On the Application tier two
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internal load balancing rules are created. An internal LB rule for the guest IP 10.10.10.4
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with load balancer port 23 and instance port 25 is configured on the VM, InternalLBVM1.
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Another internal LB rule for the guest IP 10.10.10.4 with load balancer port 45 and instance
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port 46 is configured on the VM, InternalLBVM1. Another internal LB rule for the guest IP
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10.10.10.6, with load balancer port 23 and instance port 25 is configured on the VM,
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InternalLBVM2.</para>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/vpc-lb.png"/>
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</imageobject>
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<textobject>
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<phrase>vpc-lb.png: Configuring internal LB for VPC</phrase>
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</textobject>
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</mediaobject>
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</section>
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<section id="enable-vpc-lb">
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<title>Enabling Internal LB on a VPC Tier</title>
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<orderedlist>
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<listitem>
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<para>IP Addresses</para>
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<para>Create a network offering, as given in <xref linkend="int-lb-vpc"/>.</para>
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</listitem>
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<listitem>
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<para>Gateways</para>
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<para>Create an internal load balancing rule and apply, as given in <xref
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linkend="int-lb-vpc"/>.</para>
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</listitem>
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</orderedlist>
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</section>
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<section id="int-lb-offering">
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<title>Creating a Network Offering for Internal LB</title>
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<para>To have internal LB support on VPC, create a network offering as follows: </para>
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<orderedlist>
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<listitem>
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<para>Log in to the &PRODUCT; UI as a user or admin.</para>
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</listitem>
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<listitem>
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<para>Site-to-Site VPN</para>
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<para>From the Select Offering drop-down, choose Network Offering.</para>
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</listitem>
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<listitem>
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<para>Network ACLs</para>
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</listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para>Select IP Addresses.</para>
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<para>The IP Addresses page is displayed.</para>
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</listitem>
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<listitem>
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<para>Click the IP address for which you want to create the rule, then click the Configuration
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tab.</para>
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</listitem>
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<listitem>
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<para>In the Load Balancing node of the diagram, click View All.</para>
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</listitem>
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<listitem>
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<para>Select the tier to which you want to apply the rule.</para>
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<note>
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<para>In a VPC, the load balancing service is supported only on a single tier.</para>
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</note>
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</listitem>
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<listitem>
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<para>Specify the following:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis role="bold">Name</emphasis>: A name for the load balancer rule.</para>
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<para>Click Add Network Offering.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Public Port</emphasis>: The port that receives the incoming
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traffic to be balanced.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Private Port</emphasis>: The port that the VMs will use to
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receive the traffic.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Algorithm</emphasis>. Choose the load balancing algorithm you
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want &PRODUCT; to use. &PRODUCT; supports the following well-known algorithms:</para>
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<para>In the dialog, make the following choices:</para>
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<itemizedlist>
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<listitem>
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<para>Round-robin</para>
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<para><emphasis role="bold">Name</emphasis>: Any desired name for the network
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offering.</para>
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</listitem>
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<listitem>
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<para>Least connections</para>
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<para><emphasis role="bold">Description</emphasis>: A short description of the
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offering that can be displayed to users.</para>
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</listitem>
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<listitem>
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<para>Source</para>
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<para><emphasis role="bold">Network Rate</emphasis>: Allowed data transfer rate in MB
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per second.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Traffic Type</emphasis>: The type of network traffic that
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will be carried on the network.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Guest Type</emphasis>: Choose whether the guest network is
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isolated or shared.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Persistent</emphasis>: Indicate whether the guest network
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is persistent or not. The network that you can provision without having to deploy a
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VM on it is termed persistent network. </para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">VPC</emphasis>: This option indicate whether the guest
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network is Virtual Private Cloud-enabled. A Virtual Private Cloud (VPC) is a
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private, isolated part of &PRODUCT;. A VPC can have its own virtual network topology
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that resembles a traditional physical network. For more information on VPCs, see
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<xref linkend="vpc"/>.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Specify VLAN</emphasis>: (Isolated guest networks only)
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Indicate whether a VLAN should be specified when this offering is used.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Supported Services</emphasis>: Select Load Balancer.
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Select <code>InternalLbVM</code> from the provider list.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Load Balancer Type</emphasis>: Select Internal LB from the
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drop-down.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">System Offering</emphasis>: Choose the system service
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offering that you want virtual routers to use in this network.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Conserve mode</emphasis>: Indicate whether to use conserve
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mode. In this mode, network resources are allocated only when the first virtual
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machine starts in the network.</para>
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</listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Stickiness</emphasis>. (Optional) Click Configure and choose
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the algorithm for the stickiness policy. See Sticky Session Policies for Load Balancer
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Rules.</para>
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<para>Click OK and the network offering is created.</para>
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</listitem>
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</orderedlist>
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</section>
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<section id="int-lb-vpc">
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<title>Creating an Internal LB Rule</title>
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<orderedlist>
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<listitem>
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<para>Log in to the &PRODUCT; UI as an administrator or end user.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Add VMs</emphasis>: Click Add VMs, then select two or more VMs
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that will divide the load of incoming traffic, and click Apply.</para>
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<para>In the left navigation, choose Network.</para>
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</listitem>
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</itemizedlist>
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</listitem>
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</orderedlist>
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<para>The new load balancing rule appears in the list. You can repeat these steps to add more load
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balancing rules for this IP address.</para>
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</section>
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<listitem>
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<para>In the Select view, select VPC.</para>
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<para>All the VPCs that you have created for the account is listed in the page.</para>
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</listitem>
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<listitem>
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<para>Locate the VPC for which you want to configure internal LB, then click
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Configure.</para>
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<para>The VPC page is displayed where all the tiers you created listed in a
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diagram.</para>
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</listitem>
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<listitem>
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<para>Locate the Tier for which you want to configure an internal LB rule, click Internal
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LB.</para>
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<para>In the Internal LB page, click Add Internal LB.</para>
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</listitem>
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<listitem>
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<para>In the dialog, specify the following:</para>
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<itemizedlist>
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<listitem>
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<para><emphasis role="bold">Name</emphasis>: A name for the load balancer rule.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Description</emphasis>: A short description of the rule
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that can be displayed to users.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Source IP Address</emphasis>: The source IP from which
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traffic originates. Typically, this is the IP of an instance on another tier within
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your VPC.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Source Port</emphasis>: The port associated with the
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source IP. Traffic on this port is load balanced. </para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Instance Port</emphasis>: The port of the internal LB
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VM.</para>
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</listitem>
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<listitem>
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<para><emphasis role="bold">Algorithm</emphasis>. Choose the load balancing algorithm
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you want &PRODUCT; to use. &PRODUCT; supports the following well-known
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algorithms:</para>
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<itemizedlist>
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<listitem>
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<para>Round-robin</para>
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</listitem>
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<listitem>
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<para>Least connections</para>
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</listitem>
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<listitem>
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<para>Source</para>
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</listitem>
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</itemizedlist>
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</listitem>
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</itemizedlist>
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</listitem>
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</orderedlist>
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</section>
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</section>
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</section>
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