version: "3"
services:
    gateway:
        volumes:
            - "/var/run/docker.sock:/var/run/docker.sock"
        ports:
            - 8080:8080
        image: functions/gateway:0.6.2 
        networks:
            - functions
        environment:
            dnsrr: "true"  # Temporarily use dnsrr in place of VIP while issue persists on PWD
            faas_nats_address: "nats"
            faas_nats_port: 4222
        deploy:
            placement:
                constraints: [node.role == manager]
        # Start Add for NATS Streaming
        depends_on:
            - nats
        deploy:
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 20
                window: 380s
    nats:
        image: nats-streaming:0.5.0
        ports:
            - 4222:4222
            - 8222:8222
        command: "--store memory --cluster_id faas-cluster"
        networks:
            - functions
    queue-worker:
        image: functions/queue-worker:0.1
        networks:
            - functions
        deploy:
            restart_policy:
                condition: on-failure
                delay: 5s
                max_attempts: 20
                window: 380s
    # End

    prometheus:
        image: functions/prometheus:latest  # autobuild from Dockerfile in repo.
        command: "-config.file=/etc/prometheus/prometheus.yml -storage.local.path=/prometheus -storage.local.memory-chunks=10000 --alertmanager.url=http://alertmanager:9093"
        ports:
            - 9090:9090
        depends_on:
            - gateway
            - alertmanager
        environment:
            no_proxy: "gateway"
        networks:
            - functions
        deploy:
            placement:
                constraints: [node.role == manager]

    alertmanager:
        image: functions/alertmanager:latest    # autobuild from Dockerfile in repo.
        environment:
            no_proxy: "gateway"
#        volumes:
#            - ./prometheus/alertmanager.yml:/alertmanager.yml
        command:
            - '-config.file=/alertmanager.yml'
        networks:
            - functions
        ports:
            - 9093:9093
        deploy:
            placement:
                constraints: [node.role == manager]

    # Sample functions go here.

    # Pass a username as an argument to find how many images user has pushed to Docker Hub.
    hubstats:
        image: alexellis2/faas-dockerhubstats:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            no_proxy: "gateway"
            https_proxy: $https_proxy

    # Node.js gives OS info about the node (Host)
    nodeinfo:
        image: functions/nodeinfo:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            no_proxy: "gateway"
            https_proxy: $https_proxy

    # Uses `cat` to echo back response, fastest function to execute.
    echoit:
        image: functions/alpine:health
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            fprocess: "cat"
            no_proxy: "gateway"
            https_proxy: $https_proxy

networks:
    functions:
        driver: overlay
        # Docker does not support this option yet - maybe create outside of the stack and reference as "external"?
        #attachable: true