AppMesh and ECS with Imported ACM certificates on Envoy Sidecar by way of EFS

Abstract#

This information showcases the flexibility to make use of imported certificates from a 3rd social gathering supplier (e.g. Venafi) in ACM, mount them in EFS and use them as trusted sources on Envoy sidecars with functions operating in ECS. AppMesh is used as a passthrough with TLS termination occurring on the applying container layer.

Stipulations and limitations#

Stipulations#

A certificates that comprises the chain of domains required for the fronted service and micro-services wanted.

What we’ll produce:

  • ACM containing an Imported Certificates.
  • EFS quantity.
  • Route53 document.
  • Community Load Balancer, with related Goal Group.
  • ECS cluster, with Duties managed by a Service. A Activity Definition to compound the mapping standards.
  • AppMesh Digital Gateway, Digital Service and Digital Node pointing again to the ECS job containers.
  • CloudMap to combine ECS and AppMesh configurations with automation.
  • Bastion host used for testing functions.

Structure#

Goal expertise stack#

ACM, EFS, Route53, NLB, TG, ECS, AppMesh, CloudMap

Goal structure

#

N/A

Finest practices#

ACM – Certificates Supervisor#

Certificates are imported from Venafi (third social gathering supplier):

Drilling into this data, the domains listed comprise adequate subdomains to deal with the micro-services oriented structure.

EFS#

AppMesh doesn’t help ACM PCM Certificates straight, so they’re loaded onto an EFS quantity that will probably be mounted on the Envoy sidecar containers.

Route53#

A hosted zone is setup in Route53 to have the ability to route site visitors from our main area to a Community Load Balancer.

LoadBalancer#

This Community Load Balancer is setup as inside to permit for managed inside site visitors solely.

There’s a single listener open on port 443:

Goal Group#

The Goal Group routes site visitors to the applying port on two ECS duties behind our ECS service.

The well being test confirms entry on the outlined site visitors port, which is the applying container port for ECS.

ECS#

Every service fronts it’s personal microservice software, which consists of an software container and an envoy sidecar.

The service comprises a number of duties to distribute load.

A number of containers reside inside every job definition.

Community bindings are setup to permit site visitors by way of the applying ports that had been setup beforehand within the goal teams.

Establishing Envoy to have the ability to validate the certificates for software TLS termination is essential. To do that, an envoy job definition might look one thing like this:

{
    "taskDefinitionArn": "arn:aws:ecs:af-south-1:xxxxxx:task-definition/envoy-task:12",
    "containerDefinitions": [
        {
            "name": "envoy",
            "image": "xxxxx.dkr.ecr.af-south-1.amazonaws.com/aws-appmesh-envoy:v1.22.2.1-prod",
            "cpu": 0,
            "memory": 500,
            "portMappings": [
                {
                    "containerPort": 8443,
                    "hostPort": 8443,
                    "protocol": "tcp"
                },
                {
                    "containerPort": 8080,
                    "hostPort": 8080,
                    "protocol": "tcp"
                },
                {
                    "containerPort": 9901,
                    "hostPort": 9901,
                    "protocol": "tcp"
                }
            ],
            "important": true,
            "surroundings": [
                {
                    "name": "APPMESH_VIRTUAL_NODE_NAME",
                    "value": "mesh/VAX/virtualGateway/om-xxx-vgw"
                },
                {
                    "name": "ENVOY_LOG_LEVEL",
                    "value": "debug"
                }
            ],
            "mountPoints": [
                {
                    "sourceVolume": "cert-vol",
                    "containerPath": "/certs",
                    "readOnly": true
                }
            ],
            "volumesFrom": [],
            "consumer": "1337",
            "logConfiguration": {
                "logDriver": "awslogs",
                "choices": {
                    "awslogs-group": "/ecs/envoy-task",
                    "awslogs-region": "af-south-1",
                    "awslogs-stream-prefix": "ecs"
                }
            },
            "healthCheck":  grep state 
        }
    ],
    "household": "envoy-task",
    "taskRoleArn": "arn:aws:iam::xxxxxx:position/Bounded-AmazonECSTaskExecutionRole",
    "executionRoleArn": "arn:aws:iam::xxxxxx:position/Bounded-AmazonECSTaskExecutionRole",
    "networkMode": "awsvpc",
    "revision": 12,
    "volumes": [
        {
            "name": "cert-vol",
            "efsVolumeConfiguration": {
                "fileSystemId": "fs-01c20c20xxxxd3",
                "rootDirectory": "/",
                "transitEncryption": "ENABLED",
                "authorizationConfig": {
                    "accessPointId": "fsap-06a57e7xxx1d439",
                    "iam": "DISABLED"
                }
            }
        }
    ],
    "standing": "ACTIVE",
    "requiresAttributes": [
        {"name": "ecs.capability.execution-role-awslogs"},
        {"name": "com.amazonaws.ecs.capability.ecr-auth"},
        {"name": "com.amazonaws.ecs.capability.docker-remote-api.1.17"},
        {"name": "com.amazonaws.ecs.capability.task-iam-role"},
        {"name": "ecs.capability.container-health-check"},
        {"name": "ecs.capability.execution-role-ecr-pull"},
        {"name": "com.amazonaws.ecs.capability.docker-remote-api.1.18"},
        {"name": "ecs.capability.task-eni"},
        {"name": "com.amazonaws.ecs.capability.docker-remote-api.1.29"},
        {"name": "com.amazonaws.ecs.capability.logging-driver.awslogs"},
        {"name": "ecs.capability.efsAuth"},
        {"name": "com.amazonaws.ecs.capability.docker-remote-api.1.19"},
        {"name": "ecs.capability.efs"},
        {"name": "com.amazonaws.ecs.capability.docker-remote-api.1.25"}
    ],
    "placementConstraints": [],
    "compatibilities": [
        "EC2",
        "FARGATE"
    ],
    "requiresCompatibilities": [
        "FARGATE"
    ],
    "cpu": "1024",
    "reminiscence": "2048",
    "runtimePlatform": {
        "operatingSystemFamily": "LINUX"
    },
    "registeredAt": "20xx-08-31T12:01:xx.525Z",
    "registeredBy": "arn:aws:sts::xxxx:assumed-role/XXXUsrRole/[email protected]",
    "tags": []
}

AppMesh#

There’s a single Mesh outlined.

Mesh

#

On this setup, we make use of Digital Gateways, Digital Companies and Digital Nodes to route again to operating ECS companies.

Digital Gateway#

A single digital gateway is provisioned.

The configuration of which mounts the EFS quantity’s certificates chain, and acts as a passthrough, or permissive site visitors circulate.

om-vas-vgw

meshName: VAS
virtualGatewayName: om-vas-vgw
spec:
  backendDefaults:
    clientPolicy: {}
  listeners:
    - portMapping:
        port: 8443
        protocol: http
      tls:
        certificates:
          file:
            certificateChain: /certs/vas-api-service.instance.com.crt
            privateKey: /certs/new.key
        mode: PERMISSIVE
    - portMapping:
        port: 8080
        protocol: http
  logging:
    accessLog:
      file:
        path: /dev/std

Listeners:
Listeners of which, are setup for each TLS and non-TLS, solely for testing functions throughout improvement phases solely.

Gateway Routes#

A gateway route is setup to route http sort site visitors by way of to a digital service outlined under.

vas-api-service-route:

meshName: VAS
virtualGatewayName: om-vas-vgw
gatewayRouteName: vas-api-service-route
spec:
  httpRoute:
    motion:
      rewrite:
        hostname:
          defaultTargetHostname: DISABLED
        prefix:
          defaultPrefix: ENABLED
      goal:
        virtualService:
          virtualServiceName: om-vas-api-vsvc
    match:
      port: 8443
      prefix: /

The digital service is attached to a digital node by way of the under configuration.
om-vas-api-vsv:

meshName: VAS
virtualServiceName: om-vas-api-vsvc
spec:
  supplier:
    virtualNode:
      virtualNodeName: om-vas-api-server-vnode

Digital Node:#

The digital node permits site visitors to go by way of to the applying port on 34559 as proven under.

meshName: VAS
virtualNodeName: om-vas-api-server-vnode
spec:
  backendDefaults:
    clientPolicy:
      tls:
        implement: false
        ports: []
        validation:
          belief:
            file:
              certificateChain: /certs/vas-api-service.instance.com.crt
  backends: []
  listeners:
    - healthCheck:
        healthyThreshold: 3
        intervalMillis: 10000
        path: /
        port: 34559
        protocol: tcp
        timeoutMillis: 5000
        unhealthyThreshold: 2
      portMapping:
        port: 34559
        protocol: tcp
  logging: {}
  serviceDiscovery:
    awsCloudMap:
      attributes: []
      namespaceName: instance.com
      serviceName: vas-api-service

Digital Node Listeners:#

A visible illustration is as follows:

CloudMap#

CloudMap supplies service discovery for our sources, we begin with a namespace which can be utilized for API calls and DNS queries inside the VPC.
We now have created a namespace to deal with our collective sources.

Right here we will see the Service Situations that ECS duties are reporting again to us.

If we have a look at one in all them, we will see the data that can inform AppMesh:

Confirming site visitors circulate#

Operating the next connection assessments by way of a Bastion permits us to remain inside the identical inside community for all assessments.

Now we set off the service straight on ECS to see the certificates is accepted:

sh-4.4$ curl -I https://vas-api-service.instance.com:34559/swagger-ui/
HTTP/1.1 200 OK
Final-Modified: Wed, 20 Jul 2022 13:15:06 GMT
Content material-Size: 3129
Settle for-Ranges: bytes
Content material-Kind: textual content/html

Then we will take a look at that the precise entrance service by way of the chain beginning with Route53 connects efficiently:

sh-4.4$ curl -I https://vas.instance.com/swagger-ui/
HTTP/1.1 200 OK
Final-Modified: Wed, 20 Jul 2022 13:15:06 GMT
Content material-Size: 3129
Settle for-Ranges: bytes
Content material-Kind: textual content/html

Lastly we guarantee that the connection straight from the load balancer doesn’t enable ingress:

sh-4.4$ curl -I https://om-vas-service-nlb-be13b4dccxxxxxx.elb.af-south-1.amazonaws.com/swagger-ui/
curl: (51) SSL: no different certificates topic title matches goal host title 'om-vas-service-nlb-be13b4dccxxxxx.elb.af-south-1.amazonaws.com'
sh-4.4$

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