Manage an SLB instance - Terraform - Alibaba Cloud Documentation Center

This topic describes how to create a Server Load Balancer (SLB) instance and add a listener in the SLB instance.

Prerequisites

Before you begin, make sure that you have completed the following operations:

Prepare an Alibaba Cloud account and an AccessKey pair (AccessKey ID and AccessKey secret) to use Terraform. You can go to the Security Management page of the Alibaba Cloud console to create or view your AccessKey pair.
Install and configure Terraform. For more information, see Install and configure Terraform in the local PC and Use Terraform in Cloud Shell.

Background information

This topic uses an Internet-facing subscription SLB instance named slb_worder that is configured with TCP, UDP, and HTTP listeners as an example.

Procedure

Create an SLB instance.
1. Create the terraform.tf file, enter the following content, and save the file to the current working directory.
  Note
  You must create an independent working directory for each Terraform project. You must have at least one .tf file before you initialize the configuration files.
```
resource "alicloud_slb_load_balancer" "instance" {
  load_balancer_name   = "slb_worder"
  load_balancer_spec   = "slb.s3.small"
  internet_charge_type = "PayByTraffic"
  address_type         = "internet"
}
```
2. Run the terraform apply command to create the SLB instance. If log entries similar to the following ones are displayed, the SLB instance is created.
```
alicloud_slb_load_balancer.instance: Creating...
alicloud_slb_load_balancer.instance: Still creating... [10s elapsed]
alicloud_slb_load_balancer.instance: Creation complete after 14s [id=lb-gw89kh14ra0htarr1ub8n]
......
Apply complete! Resources: 1 added, 0 changed, 0 destroyed.
```
3. Run the terraform show command to view the created SLB instance.

Add listeners in the SLB instance. In this example, an HTTP listener, a UDP listener, and a TCP listener are added.

Create the listener.tf file, enter the following content, and save the file to the current working directory.

Note

Terraform will automatically load all of the .tf files in the directory. You can write configuration information to different files as needed.

resource "alicloud_slb_listener" "tcp" {
  load_balancer_id          = alicloud_slb_load_balancer.instance.id
  backend_port              = "22"
  frontend_port             = "22"
  protocol                  = "tcp"
  bandwidth                 = "10"
  health_check_type         = "tcp"
  persistence_timeout       = 3600
  healthy_threshold         = 8
  unhealthy_threshold       = 8
  health_check_timeout      = 8
  health_check_interval     = 5
  health_check_http_code    = "http_2xx"
  health_check_connect_port = 20
  health_check_uri          = "/console"
  established_timeout       = 600
}

resource "alicloud_slb_listener" "udp" {
  load_balancer_id          = alicloud_slb_load_balancer.instance.id
  backend_port              = 2001
  frontend_port             = 2001
  protocol                  = "udp"
  bandwidth                 = 10
  persistence_timeout       = 3600
  healthy_threshold         = 8
  unhealthy_threshold       = 8
  health_check_timeout      = 8
  health_check_interval     = 4
  health_check_connect_port = 20
}

resource "alicloud_slb_listener" "http" {
  load_balancer_id          = alicloud_slb_load_balancer.instance.id
  backend_port              = 80
  frontend_port             = 80
  protocol                  = "http"
  sticky_session            = "on"
  sticky_session_type       = "insert"
  cookie                    = "testslblistenercookie"
  cookie_timeout            = 86400
  health_check              = "on"
  health_check_uri          = "/cons"
  health_check_connect_port = 20
  healthy_threshold         = 8
  unhealthy_threshold       = 8
  health_check_timeout      = 8
  health_check_interval     = 5
  health_check_http_code    = "http_2xx,http_3xx"
  bandwidth                 = 10
  request_timeout           = 80
  idle_timeout              = 30
}

Run the terraform apply command to add the listeners. If log entries similar to the following ones are displayed, the listeners are added.

alicloud_slb_listener.udp: Creating...
alicloud_slb_listener.http: Creating...
alicloud_slb_listener.tcp: Creating...
alicloud_slb_listener.http: Creation complete after 5s [id=lb-gw89kh14ra0htarr1ub8n:http:80]
......
Apply complete! Resources: 3 added, 0 changed, 0 destroyed.

Run the terraform show command to view the added listeners.