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net_lb_ext module e2e and example testing changes #1909

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Dec 8, 2023
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net_lb_ext module e2e and example testing changes #1909

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b8263c4
net_lb_ext test changes
dibaskar-google Dec 7, 2023
a174919
trimmed inventory yaml files
dibaskar-google Dec 7, 2023
d4a5c54
renamed fw_rule yaml file
dibaskar-google Dec 7, 2023
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77 changes: 55 additions & 22 deletions modules/net-lb-ext/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ This example shows how to reference existing Managed Infrastructure Groups (MIGs
module "instance_template" {
source = "./fabric/modules/compute-vm"
project_id = var.project_id
zone = "europe-west1-b"
zone = "${var.region}-b"
name = "vm-test"
create_template = true
service_account = {
Expand All @@ -36,7 +36,7 @@ module "instance_template" {
module "mig" {
source = "./fabric/modules/compute-mig"
project_id = var.project_id
location = "europe-west1"
location = var.region
name = "mig-test"
target_size = 1
instance_template = module.instance_template.template.self_link
Expand All @@ -45,7 +45,7 @@ module "mig" {
module "nlb" {
source = "./fabric/modules/net-lb-ext"
project_id = var.project_id
region = "europe-west1"
region = var.region
name = "nlb-test"
backends = [{
group = module.mig.group_manager.instance_group
Expand All @@ -56,25 +56,36 @@ module "nlb" {
}
}
}
# tftest modules=3 resources=6
# tftest modules=3 resources=6 inventory=migs.yaml e2e
```

### Externally managed instances

This examples shows how to create an NLB by combining externally managed instances (in a custom module or even outside of the current root module) in an unmanaged group. When using internally managed groups, remember to run `terraform apply` each time group instances change.

```hcl
module "instance" {
source = "./fabric/modules/compute-vm"
for_each = toset(["b", "c"])
name = "instance-${each.key}"
project_id = var.project_id
zone = "${var.region}-b"
network_interfaces = [{
network = var.vpc.self_link
subnetwork = var.subnet.self_link
}]
}

module "nlb" {
source = "./fabric/modules/net-lb-ext"
project_id = var.project_id
region = "europe-west1"
region = var.region
name = "nlb-test"
group_configs = {
my-group = {
zone = "europe-west1-b"
zone = "${var.region}-b"
instances = [
"instance-1-self-link",
"instance-2-self-link"
for z in ["b", "c"] : module.instance[z].id
]
}
}
Expand All @@ -87,7 +98,7 @@ module "nlb" {
}
}
}
# tftest modules=1 resources=4
# tftest modules=3 resources=6 inventory=ext_migs.yaml e2e
```

### Mutiple forwarding rules
Expand All @@ -100,10 +111,22 @@ The example adds two forwarding rules:
- the second one, called `nlb-test-vip-two` exposes an IPv4 address, it listens on port 80 and allows connections from the same region only.

```hcl
module "instance" {
source = "./fabric/modules/compute-vm"
for_each = toset(["b", "c"])
name = "instance-${each.key}"
project_id = var.project_id
zone = "${var.region}-b"
network_interfaces = [{
network = var.vpc.self_link
subnetwork = var.subnet.self_link
}]
}

module "nlb" {
source = "./fabric/modules/net-lb-ext"
project_id = var.project_id
region = "europe-west1"
region = var.region
name = "nlb-test"
backends = [{
group = module.nlb.groups.my-group.self_link
Expand All @@ -116,15 +139,14 @@ module "nlb" {
}
group_configs = {
my-group = {
zone = "europe-west1-b"
zone = "${var.region}-b"
instances = [
"instance-1-self-link",
"instance-2-self-link"
for z in ["b", "c"] : module.instance[z].id
]
}
}
}
# tftest modules=1 resources=5
# tftest modules=3 resources=7 inventory=fw_rules.yaml e2e
```

### Dual stack (IPv4 and IPv6)
Expand All @@ -133,10 +155,22 @@ Your load balancer can use a combination of either or both IPv4 and IPv6 forward
In this example we set the load balancer to work as dual stack, meaning it exposes both an IPv4 and an IPv6 address.

```hcl
module "instance" {
source = "./fabric/modules/compute-vm"
for_each = toset(["b", "c"])
name = "instance-${each.key}"
project_id = var.project_id
zone = "${var.region}-b"
network_interfaces = [{
network = var.vpc.self_link
subnetwork = var.subnet.self_link
}]
}

module "nlb" {
source = "./fabric/modules/net-lb-ext"
project_id = var.project_id
region = "europe-west1"
region = var.region
name = "nlb-test"
backends = [{
group = module.nlb.groups.my-group.self_link
Expand All @@ -151,15 +185,14 @@ module "nlb" {
}
group_configs = {
my-group = {
zone = "europe-west1-b"
zone = "${var.region}-b"
instances = [
"instance-1-self-link",
"instance-2-self-link"
for z in ["b", "c"] : module.instance[z].id
]
}
}
}
# tftest modules=1 resources=5
# tftest modules=3 resources=7 inventory=dual_stack.yaml e2e
```

### End to end example
Expand All @@ -181,7 +214,7 @@ module "instance-group" {
source = "./fabric/modules/compute-vm"
for_each = toset(["b", "c"])
project_id = var.project_id
zone = "europe-west1-${each.key}"
zone = "${var.region}-${each.key}"
name = "nlb-test-${each.key}"
network_interfaces = [{
network = var.vpc.self_link
Expand All @@ -206,7 +239,7 @@ module "instance-group" {
module "nlb" {
source = "./fabric/modules/net-lb-ext"
project_id = var.project_id
region = "europe-west1"
region = var.region
name = "nlb-test"
backends = [
for z, mod in module.instance-group : {
Expand All @@ -224,7 +257,7 @@ module "nlb" {
}
}
}
# tftest modules=3 resources=7
# tftest modules=3 resources=7 inventory=e2e.yaml e2e
```
<!-- BEGIN TFDOC -->
## Variables
Expand Down