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ALB Listener Rule, weighted Target Groups
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resource "aws_alb_listener_rule" "http_80" { | |
count = local.lb ? 1 : 0 | |
listener_arn = data.aws_alb_listener.http_80.arn | |
action { | |
type = "forward" | |
target_group_arn = aws_alb_target_group.http_80[0].arn | |
} | |
condition { | |
host_header { | |
values = [local.host_name] | |
} | |
} | |
// todo: terraform does not yet support weighted target groups | |
provisioner "local-exec" { | |
command = local.blue_green ? "${path.module}/add_target_groups_to_listener_rule.sh ${data.aws_region.current.name} ${data.aws_alb_listener.http_80.arn} ${self.arn} ${aws_alb_target_group.http_80[1].arn}" : "echo" | |
} | |
lifecycle { | |
ignore_changes = [action.0.target_group_arn] | |
} | |
} |
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#!/bin/bash | |
set -eo pipefail | |
aws_region=$1 | |
listener_arn=$2 | |
rule_arn=$3 | |
tg_http_80_1_arn=$4 | |
rules=$(aws elbv2 describe-rules --region $aws_region --listener-arn $listener_arn) | |
rule=$(echo $rules | jq --arg rule_arn "$rule_arn" '.Rules[] | select(.RuleArn == $rule_arn)') | |
expr_fwdcfg='.Actions[.Actions | map(.Type=="forward") | index(true)].ForwardConfig' | |
rule=$(echo $rule | jq --arg tg_arn "$tg_http_80_1_arn" "$expr_fwdcfg"' | |
.TargetGroups += [{ | |
"TargetGroupArn": $tg_arn, | |
"Weight": 0 | |
}]') | |
rule=$(echo $rule | jq "$expr_fwdcfg"' | |
.TargetGroupStickinessConfig = { | |
"Enabled": true, | |
"DurationSeconds": 86400 | |
}') | |
rule=$(echo $rule | jq 'del(.Priority) | |
| del(.IsDefault) | |
| (.Conditions |= map(del(.Values))) | |
| (.Actions |= map(del(.TargetGroupArn)))') | |
echo "rule=$rule" | |
aws elbv2 modify-rule --region $aws_region --rule-arn $rule_arn --cli-input-json "$rule" |
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