faas/docker-compose.yml

version: "3"
services:

# Core API services are pinned, HA is provided for functions.
    gateway:
        volumes:
            - "/var/run/docker.sock:/var/run/docker.sock"
        ports:
            - 8080:8080
        image: alexellis2/faas-gateway:latest
        networks:
            - functions
        deploy:
            placement:
                constraints: [node.role == manager]

    prometheus:
        image: quay.io/prometheus/prometheus:latest
        volumes:
            - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
            - ./prometheus/alert.rules:/etc/prometheus/alert.rules

        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: quay.io/prometheus/alertmanager
        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.

    # Service label of "function" allows functions to show up in UI on http://gateway:8080/
    webhookstash:
        image: alexellis2/faas-webhookstash:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # 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: alexellis2/faas-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: alexellis2/faas-alpinefunction:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            fprocess:	"cat"
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # Counts words in request with `wc` utility
    wordcount:
        image: alexellis2/faas-alpinefunction:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            fprocess:	"wc"
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # Calculates base64 representation of request body.
    base64:
        image: alexellis2/faas-alpinefunction:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            fprocess:	"base64"
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # Decodes base64 representation of request body.
    decodebase64:
        image: alexellis2/faas-alpinefunction:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            fprocess:	"base64 -d"
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # Converts body in (markdown format) -> (html)
    markdown:
        image: alexellis2/faas-markdownrender:latest
        labels:
            function: "true"
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            no_proxy:   "gateway"
            https_proxy: $https_proxy

    # Example of Alexa SDK skill, set skill to invoke HTTPs endpoint in Amazon Alexa Skills page. 
    alexacolorchange:
        labels:
            function: "true"
        image: alexellis2/faas-alexachangecolorintent 
        depends_on:
            - gateway
        networks:
            - functions
        environment:
            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