reserva

Redis-based web gateway.

Use case

Configuration

See lib/spec.js https://github.com/evanx/reserva/blob/master/lib/spec.js

    env: {
        redisHost: {
            description: 'the Redis host',
            default: 'localhost'
        },
        redisPort: {
            description: 'the Redis port',
            default: 6379
        },
        redisNamespace: {
            description: 'the Redis namespace',
            default: 'reserva'
        }
    }

Our spec also exposes the Redis keys used by this service:

    redisK: config => ({
        reqS: {
            key: `${config.redisNamespace}:req:s`
        },
        reqQ: {
            key: `${config.redisNamespace}:req:q`
        },
        reqH: {
            key: sha => `${config.redisNamespace}:${sha}:req:h`
        },
        busyQ: {
            key: `${config.redisNamespace}:busy:q`
        },
        reqC: {
            key: `${config.redisNamespace}:req:count:h`
        },
        errorC: {
            key: `${config.redisNamespace}:error:count:h`
        }
    })

Docker

See Dockerfile https://github.com/evanx/reserva/blob/master/Dockerfile

FROM mhart/alpine
ADD package.json .
RUN npm install --silent
ADD lib lib
ENV NODE_ENV production
CMD ["node", "lib/index.js"]

We can build as follows:

docker build -t reserva https://github.com/evanx/reserva.git

where the image is tagged as reserva

Then for example, we can run on the host's Redis as follows:

docker run --network=host -e reserva

Note --network-host connects the container to your localhost bridge. The default Redis host localhost works in that case.

Since the containerized app has access to the host's Redis instance, you should inspect the source.

Implementation

See lib/main.js https://github.com/evanx/reserva/blob/master/lib/main.js

Uses application archetype: https://github.com/evanx/redis-koa-app

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