Add pod identity credential integration test #450
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| // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| // SPDX-License-Identifier: MIT | ||
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| module "common" { | ||
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There was a problem hiding this comment. just curious -- is there a way we can re-use existing terraform modules from our other eks tests? So that we aren't adding all this terraform code for every new eks test we add There was a problem hiding this comment. I think should be possible but probably need to refactor some code. Don't think we should do it in this PR since that adds additional code that's not necessarily related to the goal of this PR. |
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| source = "../../../../common" | ||
| } | ||
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| module "basic_components" { | ||
| source = "../../../../basic_components" | ||
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| region = var.region | ||
| } | ||
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| locals { | ||
| aws_eks = "aws eks --region ${var.region}" | ||
| } | ||
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| data "aws_eks_cluster_auth" "this" { | ||
| name = aws_eks_cluster.this.name | ||
| } | ||
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| resource "aws_eks_cluster" "this" { | ||
| name = "cwagent-eks-integ-${module.common.testing_id}" | ||
| role_arn = module.basic_components.role_arn | ||
| version = var.k8s_version | ||
| vpc_config { | ||
| subnet_ids = module.basic_components.public_subnet_ids | ||
| security_group_ids = [module.basic_components.security_group] | ||
| } | ||
| } | ||
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| # EKS Node Groups | ||
| resource "aws_eks_node_group" "this" { | ||
| cluster_name = aws_eks_cluster.this.name | ||
| node_group_name = "cwagent-eks-integ-node-${module.common.testing_id}" | ||
| node_role_arn = aws_iam_role.node_role.arn | ||
| subnet_ids = module.basic_components.public_subnet_ids | ||
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| scaling_config { | ||
| desired_size = 1 | ||
| max_size = 1 | ||
| min_size = 1 | ||
| } | ||
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| ami_type = var.ami_type | ||
| capacity_type = "ON_DEMAND" | ||
| disk_size = 20 | ||
| instance_types = [var.instance_type] | ||
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| depends_on = [ | ||
| aws_iam_role_policy_attachment.node_AmazonEC2ContainerRegistryReadOnly, | ||
| aws_iam_role_policy_attachment.node_AmazonEKS_CNI_Policy, | ||
| aws_iam_role_policy_attachment.node_AmazonEKSWorkerNodePolicy, | ||
| aws_iam_role_policy_attachment.pod_CloudWatchAgentServerPolicy | ||
| ] | ||
| } | ||
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| resource "aws_eks_addon" "pod_identity_addon" { | ||
| cluster_name = aws_eks_cluster.this.name | ||
| addon_name = "eks-pod-identity-agent" | ||
| depends_on = [aws_eks_node_group.this] | ||
| } | ||
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| # EKS Node IAM Role | ||
| resource "aws_iam_role" "node_role" { | ||
| name = "cwagent-eks-Worker-Role-${module.common.testing_id}" | ||
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| assume_role_policy = <<POLICY | ||
| { | ||
| "Version": "2012-10-17", | ||
| "Statement": [ | ||
| { | ||
| "Effect": "Allow", | ||
| "Principal": { | ||
| "Service": "ec2.amazonaws.com" | ||
| }, | ||
| "Action": "sts:AssumeRole" | ||
| } | ||
| ] | ||
| } | ||
| POLICY | ||
| } | ||
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| data "aws_iam_policy_document" "pod-identity-policy" { | ||
| statement { | ||
| effect = "Allow" | ||
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| principals { | ||
| type = "Service" | ||
| identifiers = ["pods.eks.amazonaws.com"] | ||
| } | ||
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| actions = [ | ||
| "sts:AssumeRole", | ||
| "sts:TagSession" | ||
| ] | ||
| } | ||
| } | ||
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| resource "aws_iam_role" "pod-identity-role" { | ||
| name = "cwagent-eks-pod-identity-role-${module.common.testing_id}" | ||
| assume_role_policy = data.aws_iam_policy_document.pod-identity-policy.json | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "node_AmazonEKSWorkerNodePolicy" { | ||
| policy_arn = "arn:aws:iam::aws:policy/AmazonEKSWorkerNodePolicy" | ||
| role = aws_iam_role.node_role.name | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "node_AmazonEKS_CNI_Policy" { | ||
| policy_arn = "arn:aws:iam::aws:policy/AmazonEKS_CNI_Policy" | ||
| role = aws_iam_role.node_role.name | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "node_AmazonEC2ContainerRegistryReadOnly" { | ||
| policy_arn = "arn:aws:iam::aws:policy/AmazonEC2ContainerRegistryReadOnly" | ||
| role = aws_iam_role.node_role.name | ||
| } | ||
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| resource "aws_iam_role_policy_attachment" "pod_CloudWatchAgentServerPolicy" { | ||
| policy_arn = "arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy" | ||
| role = aws_iam_role.pod-identity-role.name | ||
| } | ||
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| resource "aws_eks_pod_identity_association" "association" { | ||
| cluster_name = aws_eks_cluster.this.name | ||
| namespace = "amazon-cloudwatch" | ||
| service_account = "cloudwatch-agent" | ||
| role_arn = aws_iam_role.pod-identity-role.arn | ||
| depends_on = [aws_eks_cluster.this] | ||
| } | ||
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| # TODO: these security groups be created once and then reused | ||
| # EKS Cluster Security Group | ||
| resource "aws_security_group" "eks_cluster_sg" { | ||
| name = "cwagent-eks-cluster-sg-${module.common.testing_id}" | ||
| description = "Cluster communication with worker nodes" | ||
| vpc_id = module.basic_components.vpc_id | ||
| } | ||
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| resource "aws_security_group_rule" "cluster_inbound" { | ||
| description = "Allow worker nodes to communicate with the cluster API Server" | ||
| from_port = 443 | ||
| protocol = "tcp" | ||
| security_group_id = aws_security_group.eks_cluster_sg.id | ||
| source_security_group_id = aws_security_group.eks_nodes_sg.id | ||
| to_port = 443 | ||
| type = "ingress" | ||
| } | ||
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| resource "aws_security_group_rule" "cluster_outbound" { | ||
| description = "Allow cluster API Server to communicate with the worker nodes" | ||
| from_port = 1024 | ||
| protocol = "tcp" | ||
| security_group_id = aws_security_group.eks_cluster_sg.id | ||
| source_security_group_id = aws_security_group.eks_nodes_sg.id | ||
| to_port = 65535 | ||
| type = "egress" | ||
| } | ||
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| # EKS Node Security Group | ||
| resource "aws_security_group" "eks_nodes_sg" { | ||
| name = "cwagent-eks-node-sg-${module.common.testing_id}" | ||
| description = "Security group for all nodes in the cluster" | ||
| vpc_id = module.basic_components.vpc_id | ||
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| egress { | ||
| from_port = 0 | ||
| to_port = 0 | ||
| protocol = "-1" | ||
| cidr_blocks = ["0.0.0.0/0"] | ||
| } | ||
| } | ||
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| resource "aws_security_group_rule" "nodes_internal" { | ||
| description = "Allow nodes to communicate with each other" | ||
| from_port = 0 | ||
| protocol = "-1" | ||
| security_group_id = aws_security_group.eks_nodes_sg.id | ||
| source_security_group_id = aws_security_group.eks_nodes_sg.id | ||
| to_port = 65535 | ||
| type = "ingress" | ||
| } | ||
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| resource "aws_security_group_rule" "nodes_cluster_inbound" { | ||
| description = "Allow worker Kubelets and pods to receive communication from the cluster control plane" | ||
| from_port = 1025 | ||
| protocol = "tcp" | ||
| security_group_id = aws_security_group.eks_nodes_sg.id | ||
| source_security_group_id = aws_security_group.eks_cluster_sg.id | ||
| to_port = 65535 | ||
| type = "ingress" | ||
| } | ||
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| resource "null_resource" "clone_helm_chart" { | ||
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There was a problem hiding this comment. Is there a reason we are using helm over the eks addon? Wondering what it is this integ test is testing -- I would assume we would want to install the addon + pod identity enabled + the release artifact of the agent = verify functionality works / calls to cw work There was a problem hiding this comment. I used helm chart for easier testing. For example, I can check out a new branch from helm chart repo with custom changes, then run terraform on my local with the said changes. Using add-on have the same effect but will be harder to test custom changes. |
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| triggers = { | ||
| timestamp = "${timestamp()}" # Forces re-run on every apply | ||
| } | ||
| provisioner "local-exec" { | ||
| command = <<-EOT | ||
| if [ ! -d "./helm-charts" ]; then | ||
| git clone -b ${var.helm_chart_branch} https://github.com/aws-observability/helm-charts.git ./helm-charts | ||
| fi | ||
| EOT | ||
| } | ||
| } | ||
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| resource "helm_release" "aws_observability" { | ||
| name = "amazon-cloudwatch-observability" | ||
| chart = "./helm-charts/charts/amazon-cloudwatch-observability" | ||
| namespace = "amazon-cloudwatch" | ||
| create_namespace = true | ||
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| set { | ||
| name = "clusterName" | ||
| value = aws_eks_cluster.this.name | ||
| } | ||
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| set { | ||
| name = "region" | ||
| value = "us-west-2" | ||
| } | ||
| depends_on = [ | ||
| aws_eks_cluster.this, | ||
| aws_eks_node_group.this, | ||
| null_resource.clone_helm_chart, | ||
| aws_eks_addon.pod_identity_addon, | ||
| aws_eks_pod_identity_association.association, | ||
| ] | ||
| } | ||
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| resource "null_resource" "kubectl" { | ||
| depends_on = [ | ||
| aws_eks_cluster.this, | ||
| aws_eks_node_group.this, | ||
| ] | ||
| provisioner "local-exec" { | ||
| command = <<-EOT | ||
| ${local.aws_eks} update-kubeconfig --name ${aws_eks_cluster.this.name} | ||
| ${local.aws_eks} list-clusters --output text | ||
| ${local.aws_eks} describe-cluster --name ${aws_eks_cluster.this.name} --output text | ||
| EOT | ||
| } | ||
| } | ||
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| resource "null_resource" "update_image" { | ||
| depends_on = [helm_release.aws_observability, null_resource.kubectl] | ||
| triggers = { | ||
| timestamp = "${timestamp()}" # Forces re-run on every apply | ||
| } | ||
| provisioner "local-exec" { | ||
| command = <<-EOT | ||
| kubectl -n amazon-cloudwatch patch AmazonCloudWatchAgent cloudwatch-agent --type='json' -p='[{"op": "replace", "path": "/spec/image", "value": "${var.cwagent_image_repo}:${var.cwagent_image_tag}"}]' | ||
| kubectl set image deployment/amazon-cloudwatch-observability-controller-manager -n amazon-cloudwatch manager=public.ecr.aws/cloudwatch-agent/cloudwatch-agent-operator:latest | ||
| sleep 10 | ||
| EOT | ||
| } | ||
| } | ||
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| resource "kubernetes_pod" "log_generator" { | ||
| depends_on = [aws_eks_node_group.this] | ||
| metadata { | ||
| name = "log-generator" | ||
| namespace = "default" | ||
| } | ||
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| spec { | ||
| container { | ||
| name = "log-generator" | ||
| image = "busybox" | ||
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| # Run shell script that generate a log line every second | ||
| command = ["/bin/sh", "-c"] | ||
| args = ["while true; do echo \"Log entry at $(date)\"; sleep 1; done"] | ||
| } | ||
| restart_policy = "Always" | ||
| } | ||
| } | ||
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| # Get the single instance ID of the node in the node group | ||
| data "aws_instances" "eks_node" { | ||
| depends_on = [ | ||
| aws_eks_node_group.this | ||
| ] | ||
| filter { | ||
| name = "tag:eks:nodegroup-name" | ||
| values = [aws_eks_node_group.this.node_group_name] | ||
| } | ||
| } | ||
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| # Retrieve details of the single instance to get private DNS | ||
| data "aws_instance" "eks_node_detail" { | ||
| depends_on = [ | ||
| data.aws_instances.eks_node | ||
| ] | ||
| instance_id = data.aws_instances.eks_node.ids[0] | ||
| } | ||
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| resource "null_resource" "validator" { | ||
| depends_on = [ | ||
| aws_eks_node_group.this, | ||
| aws_eks_addon.pod_identity_addon, | ||
| helm_release.aws_observability, | ||
| null_resource.update_image, | ||
| kubernetes_pod.log_generator, | ||
| ] | ||
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| triggers = { | ||
| always_run = timestamp() | ||
| } | ||
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| provisioner "local-exec" { | ||
| command = <<-EOT | ||
| echo "Validating CloudWatch Agent with pod identity credential" | ||
| cd ../../../../.. | ||
| go test ./test/metric_value_benchmark -timeout 1h -eksClusterName=${aws_eks_cluster.this.name} -computeType=EKS -v -eksDeploymentStrategy=PODIDENTITY -instanceId=${data.aws_instance.eks_node_detail.instance_id} && | ||
| go test ./test/fluent -eksClusterName=${aws_eks_cluster.this.name} -computeType=EKS -v -eksDeploymentStrategy=DAEMON | ||
| EOT | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| // SPDX-License-Identifier: MIT | ||
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| provider "aws" { | ||
| region = var.region | ||
| } | ||
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| provider "kubernetes" { | ||
| exec { | ||
| api_version = "client.authentication.k8s.io/v1beta1" | ||
| command = "aws" | ||
| args = ["eks", "get-token", "--cluster-name", aws_eks_cluster.this.name] | ||
| } | ||
| host = aws_eks_cluster.this.endpoint | ||
| cluster_ca_certificate = base64decode(aws_eks_cluster.this.certificate_authority.0.data) | ||
| token = data.aws_eks_cluster_auth.this.token | ||
| } | ||
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| provider "helm" { | ||
| kubernetes { | ||
| host = aws_eks_cluster.this.endpoint | ||
| cluster_ca_certificate = base64decode(aws_eks_cluster.this.certificate_authority.0.data) | ||
| exec { | ||
| api_version = "client.authentication.k8s.io/v1beta1" | ||
| args = ["eks", "get-token", "--cluster-name", aws_eks_cluster.this.name] | ||
| command = "aws" | ||
| } | ||
| } | ||
| } |
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Seems kinda interesting to put PodIdentity here...it's not necessarily a deployment type but a credential provider. Technically we can have podidentity enabled with any of these deployment options right?
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Correct. I added here just as an easy way to have a different way of running EKS tests with basics without adding another variable in the class which felt redundant.