Reference architectures

You can easily run Fleet on a single VPS that would be capable of supporting hundreds if not thousands of hosts, but this page details an opinionated view of running Fleet in a production environment, as well as different configuration strategies to enable High Availability (HA).

Availability components

There are a few strategies that can be used to ensure high availability:

• Database HA
• Traffic load balancing

Database HA

Fleet recommends RDS Aurora MySQL when running on AWS. More details about backups/snapshots can be found here. It is also possible to dynamically scale read replicas to increase performance and enable database fail-over. It is also possible to use Aurora Global to span multiple regions for more advanced configurations(not included in the reference terraform).

In some cases adding a read replica can increase database performance for specific access patterns. In scenarios when automating the API or with fleetctl there can be benefits to read performance.

Note:Fleet servers need to talk to a writer in the same datacenter. Cross region replication can be used for failover but writes need to be local.

Traffic load balancing

Load balancing enables distributing request traffic over many instances of the backend application. Using AWS Application Load Balancer can also offload SSL termination, freeing Fleet to spend the majority of it's allocated compute dedicated to its core functionality. More details about ALB can be found here.

Note if using terraform reference architecture all configurations can dynamically scale based on load(cpu/memory) and all configurations assume On-Demand pricing (savings are available through Reserved Instances). Calculations do not take into account NAT gateway charges or other networking related ingress/egress costs.

Cloud providers

AWS

Example configuration breakpoints

Up to 1000 hosts

Up to 25000 hosts

Up to 150000 hosts

Up to 300000 hosts

AWS reference architecture can be found here. This configuration includes:

• VPC
  • Subnets
    • Public & Private
  • ACLs
  • Security Groups
• ECS as the container orchestrator
  • Fargate for underlying compute
  • Task roles via IAM
• RDS Aurora MySQL 8
• Elasticache Redis Engine
• Firehose osquery log destination
  • S3 bucket sync to allow further ingestion/processing
• Monitoring via Cloudwatch alarms

Some AWS services used in the provider reference architecture are billed as pay-per-use such as Firehose. This means that osquery scheduled query frequency can have a direct correlation to how much these services cost, something to keep in mind when configuring Fleet in AWS.

AWS Terraform CI/CD IAM permissions

The following permissions are the minimum required to apply AWS terraform resources:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "ec2:*",
                "cloudwatch:*",
                "s3:*",
                "lambda:*",
                "ecs:*",
                "rds:*",
                "rds-data:*",
                "secretsmanager:*",
                "pi:*",
                "ecr:*",
                "iam:*",
                "aps:*",
                "vpc:*",
                "kms:*",
                "elasticloadbalancing:*",
                "ce:*",
                "cur:*",
                "logs:*",
                "cloudformation:*",
                "ssm:*",
                "sns:*",
                "elasticache:*",
                "application-autoscaling:*",
                "acm:*",
                "route53:*",
                "dynamodb:*",
                "kinesis:*",
                "firehose:*"
            ],
            "Resource": "*"
        }
    ]
}

GCP

GCP reference architecture can be found in the Fleet repository. This configuration includes:

• Cloud Run (Fleet backend)
• Cloud SQL MySQL 5.7 (Fleet database)
• Memorystore Redis (Fleet cache & live query orchestrator)

Example configuration breakpoints

Up to 1000 hosts

Up to 25000 hosts

Up to 150000 hosts

Azure

Coming soon. Get commmunity support.

Render

Using Render's IAC see the repository for full details.

services:
  - name: fleet
    plan: standard
    type: web
    env: docker
    healthCheckPath: /healthz
    envVars:
      - key: FLEET_MYSQL_ADDRESS
        fromService:
          name: fleet-mysql
          type: pserv
          property: hostport
      - key: FLEET_MYSQL_DATABASE
        fromService:
          name: fleet-mysql
          type: pserv
          envVarKey: MYSQL_DATABASE
      - key: FLEET_MYSQL_PASSWORD
        fromService:
          name: fleet-mysql
          type: pserv
          envVarKey: MYSQL_PASSWORD
      - key: FLEET_MYSQL_USERNAME
        fromService:
          name: fleet-mysql
          type: pserv
          envVarKey: MYSQL_USER
      - key: FLEET_REDIS_ADDRESS
        fromService:
          name: fleet-redis
          type: pserv
          property: hostport
      - key: FLEET_SERVER_TLS
        value: false
      - key: PORT
        value: 8080

  - name: fleet-mysql
    type: pserv
    env: docker
    repo: https://github.com/render-examples/mysql
    branch: mysql-5
    disk:
      name: mysql
      mountPath: /var/lib/mysql
      sizeGB: 10
    envVars:
      - key: MYSQL_DATABASE
        value: fleet
      - key: MYSQL_PASSWORD
        generateValue: true
      - key: MYSQL_ROOT_PASSWORD
        generateValue: true
      - key: MYSQL_USER
        value: fleet

  - name: fleet-redis
    type: pserv
    env: docker
    repo: https://github.com/render-examples/redis
    disk:
      name: redis
      mountPath: /var/lib/redis
      sizeGB: 10

Digital Ocean

Using Digital Ocean's App Spec to deploy on the App on the App Platform

alerts:
- rule: DEPLOYMENT_FAILED
- rule: DOMAIN_FAILED
databases:
- cluster_name: fleet-redis
  engine: REDIS
  name: fleet-redis
  production: true
  version: "6"
- cluster_name: fleet-mysql
  db_name: fleet
  db_user: fleet
  engine: MYSQL
  name: fleet-mysql
  production: true
  version: "8"
domains:
- domain: demo.fleetdm.com
  type: PRIMARY
envs:
- key: FLEET_MYSQL_ADDRESS
  scope: RUN_TIME
  value: ${fleet-mysql.HOSTNAME}:${fleet-mysql.PORT}
- key: FLEET_MYSQL_PASSWORD
  scope: RUN_TIME
  value: ${fleet-mysql.PASSWORD}
- key: FLEET_MYSQL_USERNAME
  scope: RUN_TIME
  value: ${fleet-mysql.USERNAME}
- key: FLEET_MYSQL_DATABASE
  scope: RUN_TIME
  value: ${fleet-mysql.DATABASE}
- key: FLEET_REDIS_ADDRESS
  scope: RUN_TIME
  value: ${fleet-redis.HOSTNAME}:${fleet-redis.PORT}
- key: FLEET_SERVER_TLS
  scope: RUN_AND_BUILD_TIME
  value: "false"
- key: FLEET_REDIS_PASSWORD
  scope: RUN_AND_BUILD_TIME
  value: ${fleet-redis.PASSWORD}
- key: FLEET_REDIS_USE_TLS
  scope: RUN_AND_BUILD_TIME
  value: "true"
jobs:
- envs:
  - key: DATABASE_URL
    scope: RUN_TIME
    value: ${fleet-redis.DATABASE_URL}
  image:
    registry: fleetdm
    registry_type: DOCKER_HUB
    repository: fleet
    tag: latest
  instance_count: 1
  instance_size_slug: basic-xs
  kind: PRE_DEPLOY
  name: fleet-migrate
  run_command: fleet prepare --no-prompt=true db
  source_dir: /
name: fleet
region: nyc
services:
- envs:
  - key: FLEET_VULNERABILITIES_DATABASES_PATH
    scope: RUN_TIME
    value: /home/fleet
  health_check:
    http_path: /healthz
  http_port: 8080
  image:
    registry: fleetdm
    registry_type: DOCKER_HUB
    repository: fleet
    tag: latest
  instance_count: 1
  instance_size_slug: basic-xs
  name: fleet
  routes:
  - path: /
  run_command: fleet serve
  source_dir: /

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