version: "3.3"
services:
    gateway:
        ports:
            - 8080:8080
        image: functions/gateway:0.7.9
        networks:
            - functions
        environment:
            functions_provider_url: "http://faas-swarm:8080/"
            read_timeout:  "25s"        # Maximum time to read HTTP request
            write_timeout: "25s"        # Maximum time to write HTTP response
            upstream_timeout: "20s"     # Maximum duration of upstream function call - should be more than read_timeout and write_timeout
            dnsrr: "true"               # Temporarily use dnsrr in place of VIP while issue persists on PWD
            faas_nats_address: "nats"
            faas_nats_port: 4222
            direct_functions: "true"    # Functions are invoked directly over the overlay network
            direct_functions_suffix: ""
        deploy:
            resources:
                # limits:   # Enable if you want to limit memory usage
                #     memory: 200M
                reservations:
                    memory: 100M
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 20
                window: 380s
            placement:
                constraints:
                    - 'node.platform.os == linux'

    # Docker Swarm provider
    faas-swarm:
        volumes:
            - "/var/run/docker.sock:/var/run/docker.sock"
        # ports:
            # - 8081:8080
        image:  functions/faas-swarm:0.2.3
        networks:
            - functions
        environment:
            read_timeout:  "25s"   # set both here, and on your functions
            write_timeout: "25s"   # set both here, and on your functions
            DOCKER_API_VERSION: "1.30"
        deploy:
            placement:
                constraints:
                    - 'node.role == manager'
                    - 'node.platform.os == linux'
            resources:
                # limits:   # Enable if you want to limit memory usage
                #     memory: 100M
                reservations:
                    memory: 100M
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 20
                window: 380s

    nats:
        image: nats-streaming:0.6.0
        # Uncomment the following port mappings if you wish to expose the 
        # NATS client and/or management ports
        # ports:
        #     - 4222:4222
        #     - 8222:8222
        command: "--store memory --cluster_id faas-cluster"
        networks:
            - functions
        deploy:
            resources:
                limits:
                    memory: 125M
                reservations:
                    memory: 50M
            placement:
                constraints:
                    - 'node.platform.os == linux'

    queue-worker:
        image: functions/queue-worker:0.4.3
        networks:
            - functions
        environment:
            max_inflight: "1"
            ack_timeout: "30s"    # Max duration of any async task / request
        deploy:
            resources:
                limits:
                    memory: 50M
                reservations:
                    memory: 20M
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 20
                window: 380s
            placement:
                constraints:
                    - 'node.platform.os == linux'
    # End services

    # Start monitoring

    prometheus:
        image: prom/prometheus:v2.2.0
        environment:
            no_proxy: "gateway"
        configs:
          - source: prometheus_config
            target: /etc/prometheus/prometheus.yml
          - source: prometheus_rules
            target: /etc/prometheus/alert.rules.yml
        command:
          - '--config.file=/etc/prometheus/prometheus.yml'
        #   - '-storage.local.path=/prometheus'
        ports:
            - 9090:9090
        networks:
            - functions
        deploy:
            placement:
                constraints:
                    - 'node.role == manager'
                    - 'node.platform.os == linux'
            resources:
                limits:
                    memory: 500M
                reservations:
                    memory: 200M

    alertmanager:
        image: prom/alertmanager:v0.15.0-rc.0
        environment:
            no_proxy: "gateway"
        command:
            - '--config.file=/alertmanager.yml'
            - '--storage.path=/alertmanager'
        networks:
            - functions
        # Uncomment the following port mapping if you wish to expose the Prometheus
        # Alertmanager UI.
        # ports:
        #     - 9093:9093
        deploy:
            resources:
                limits:
                    memory: 50M
                reservations:
                    memory: 20M
            placement:
                constraints: 
                    - 'node.role == manager'
                    - 'node.platform.os == linux'
        configs:
            - source: alertmanager_config
              target: /alertmanager.yml

    # Sample functions go here.

    # Pass a username as an argument to find how many images user has pushed to Docker Hub.
    hubstats:
        image: functions/hubstats:latest
        labels:
            function: "true"
        networks:
            - functions
        environment:
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'

    # Node.js gives OS info about the node (Host)
    nodeinfo:
        image: functions/nodeinfo:latest
        labels:
            function: "true"
        networks:
            - functions
        environment:
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'


    # Uses `cat` to echo back response, fastest function to execute.
    echoit:
        image: functions/alpine:latest
        labels:
            function: "true"
        networks:
            - functions
        environment:
            fprocess: "cat"
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'


    # Counts words in request with `wc` utility
    wordcount:
        image: functions/alpine:latest
        labels:
            function: "true"
            com.faas.max_replicas: "10"
        networks:
            - functions
        environment:
            fprocess: "wc"
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'


    # Calculates base64 representation of request body.
    base64:
        image: functions/alpine:latest
        labels:
            function: "true"
        networks:
            - functions
        environment:
            fprocess: "base64"
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'

    # Converts body in (markdown format) -> (html)
    markdown:
        image: functions/markdown-render:latest
        labels:
            function: "true"
        networks:
            - functions
        environment:
            no_proxy: "gateway"
            https_proxy: $https_proxy
        deploy:
            placement:
                constraints:
                    - 'node.platform.os == linux'

configs:
     prometheus_config:
         file: ./prometheus/prometheus.yml
     prometheus_rules:
         file: ./prometheus/alert.rules.yml
     alertmanager_config:
         file: ./prometheus/alertmanager.yml

networks:
    functions:
        driver: overlay
        attachable: true
        labels:
          - "openfaas=true"