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Showing content from https://docs.aws.amazon.com/goto/WebAPI/elasticloadbalancingv2-2015-12-01/CreateRule below:

CreateRule - Elastic Load Balancing

CreateRule

Creates a rule for the specified listener. The listener must be associated with an Application Load Balancer.

Each rule consists of a priority, one or more actions, and one or more conditions. Rules are evaluated in priority order, from the lowest value to the highest value. When the conditions for a rule are met, its actions are performed. If the conditions for no rules are met, the actions for the default rule are performed. For more information, see Listener rules in the Application Load Balancers Guide.

To view your current rules, use DescribeRules. To update a rule, use ModifyRule. To set the priorities of your rules, use SetRulePriorities. To delete a rule, use DeleteRule.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

Actions.member.N

The actions.

Type: Array of Action objects

Required: Yes

Conditions.member.N

The conditions.

Type: Array of RuleCondition objects

Required: Yes

ListenerArn

The Amazon Resource Name (ARN) of the listener.

Type: String

Required: Yes

Priority

The rule priority. A listener can't have multiple rules with the same priority.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 50000.

Required: Yes

Tags.member.N

The tags to assign to the rule.

Type: Array of Tag objects

Array Members: Minimum number of 1 item.

Required: No

Response Elements

The following element is returned by the service.

Rules.member.N

Information about the rule.

Type: Array of Rule objects

Errors

For information about the errors that are common to all actions, see Common Errors.

IncompatibleProtocols

The specified configuration is not valid with this protocol.

HTTP Status Code: 400

InvalidConfigurationRequest

The requested configuration is not valid.

HTTP Status Code: 400

InvalidLoadBalancerAction

The requested action is not valid.

HTTP Status Code: 400

ListenerNotFound

The specified listener does not exist.

HTTP Status Code: 400

PriorityInUse

The specified priority is in use.

HTTP Status Code: 400

TargetGroupAssociationLimit

You've reached the limit on the number of load balancers per target group.

HTTP Status Code: 400

TargetGroupNotFound

The specified target group does not exist.

HTTP Status Code: 400

TooManyActions

You've reached the limit on the number of actions per rule.

HTTP Status Code: 400

TooManyRegistrationsForTargetId

You've reached the limit on the number of times a target can be registered with a load balancer.

HTTP Status Code: 400

TooManyRules

You've reached the limit on the number of rules per load balancer.

HTTP Status Code: 400

TooManyTags

You've reached the limit on the number of tags for this resource.

HTTP Status Code: 400

TooManyTargetGroups

You've reached the limit on the number of target groups for your AWS account.

HTTP Status Code: 400

TooManyTargets

You've reached the limit on the number of targets.

HTTP Status Code: 400

TooManyUniqueTargetGroupsPerLoadBalancer

You've reached the limit on the number of unique target groups per load balancer across all listeners. If a target group is used by multiple actions for a load balancer, it is counted as only one use.

HTTP Status Code: 400

UnsupportedProtocol

The specified protocol is not supported.

HTTP Status Code: 400

Examples Create a rule that forwards to a target group if a condition is met

This example creates a rule that forwards requests to the specified target group if the URL contains the specified pattern (for example, /img/*).

Sample Request

https://elasticloadbalancing.amazonaws.com/?Action=CreateRule
&ListenerArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2
&Priority=10
&Conditions.member.1.Field=path-pattern
&Conditions.member.1.Values.member.1=/img/*
&Actions.member.1.Type=forward
&Actions.member.1.TargetGroupArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067
&Version=2015-12-01
&AUTHPARAMS

Sample Response

<CreateRuleResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <CreateRuleResult> 
    <Rules> 
      <member> 
        <IsDefault>false</IsDefault> 
        <Conditions> 
          <member> 
            <Field>path-pattern</Field> 
            <Values> 
              <member>/img/*</member> 
            </Values> 
          </member> 
        </Conditions> 
        <Priority>10</Priority> 
        <Actions> 
          <member> 
            <Type>forward</Type> 
            <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067</TargetGroupArn> 
          </member> 
        </Actions> 
        <RuleArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:listener-rule/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2/9683b2d02a6cabee</RuleArn> 
      </member> 
    </Rules> 
  </CreateRuleResult> 
  <ResponseMetadata> 
    <RequestId>c5478c83-f397-11e5-bb98-57195a6eb84a</RequestId> 
  </ResponseMetadata>
</CreateRuleResponse>

Create a rule with a forward rule and an authenticate-oidc rule

This example creates a rule that first authenticates the user and then forwards the request if the user is authenticated.

Sample Request

https://elasticloadbalancing.amazonaws.com/?Action=CreateRule
&ListenerArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2
&Priority=10
&Actions.member.1.Type=authenticate-oidc
&Actions.member.1.AuthenticateOidcConfig.Issuer="https://idp-issuer.com"
&Actions.member.1.AuthenticateOidcConfig.AuthorizationEndpoint="https://authorization-endpoint.com"
&Actions.member.1.AuthenticateOidcConfig.TokenEndpoint="https://token-endpoint.com"
&Actions.member.1.AuthenticateOidcConfig.UserInfoEndpoint="https://user-info-endpoint.com"
&Actions.member.1.AuthenticateOidcConfig.ClientId="abcdefghijklmnopqrstuvwxyz123456789"
&Actions.member.1.AuthenticateOidcConfig.ClientSecret="123456789012345678901234567890"
&Actions.member.1.AuthenticateOidcConfig.SessionTimeout=3600
&Actions.member.1.AuthenticateOidcConfig.Scope="email"
&Actions.member.1.AuthenticateOidcConfig.OnUnauthenticatedRequest="authenticate"
&Actions.member.1.Order=1
&Actions.member.2.Type=forward
&Actions.member.2.TargetGroupArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067
&Actions.member.2.Order=2
&Version=2015-12-01
&AUTHPARAMS