Created
May 18, 2022 12:20
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Attach Separate AWS Security Group To AWS MSK's ZooKeeper instances
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| resource aws_security_group "msk_nodes" {...} | |
| resource aws_msk_cluster "cluster" { | |
| broker_node_group_info { | |
| security_groups = [aws_security_group.msk_nodes.id] | |
| ... | |
| } | |
| } | |
| /* | |
| Create a new Security Group for Zookeeper instances | |
| */ | |
| resource "aws_security_group" "zookeeper" { | |
| name = "msk-${local.cluster_name}-broker-access-sg" | |
| description = "SG for MSK ${local.cluster_name} Zookeeper instance access." | |
| vpc_id = data.aws_cloudformation_export.vpc_id.value | |
| } | |
| /* | |
| Grant all resources with the aws_security_group.msk_nodes attached to them access to Zookeeper. | |
| */ | |
| resource "aws_security_group_rule" "zookeeper-broker-access" { | |
| security_group_id = aws_security_group.zookeeper.id | |
| description = "Allow MSK brokers to access Zookeeper" | |
| type = "ingress" | |
| protocol = "tcp" | |
| from_port = 2181 | |
| to_port = 2182 | |
| source_security_group_id = aws_security_group.msk_nodes.id | |
| } | |
| /* | |
| Attach Zookeeper Security Group to ENIs of Zookeeper Instances | |
| */ | |
| // Look up IP addresses for Zookeeper instances | |
| data "dns_a_record_set" "zookeeper" { | |
| for_each = toset([for url in split(",", aws_msk_cluster.cluster.zookeeper_connect_string) : split(":", url)[0]]) | |
| host = each.value | |
| } | |
| // Select Zookeeper ENIs using the found IP addresses | |
| data "aws_network_interfaces" "zookeeper" { | |
| filter { | |
| name = "addresses.private-ip-address" | |
| values = flatten([for a_record in data.dns_a_record_set.zookeeper : a_record.addrs]) | |
| } | |
| } | |
| // Attach the security group to the retrieved ENIs | |
| resource "aws_network_interface_sg_attachment" "zookeeper_sg" { | |
| for_each = toset(data.aws_network_interfaces.zookeeper.ids) | |
| network_interface_id = each.value | |
| security_group_id = aws_security_group.zookeeper.id | |
| } |
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