Use context and path-based routing

Estimated reading time: 1 minute

The following example publishes a service using context or path based routing.

First, create an overlay network so that service traffic is isolated and secure:

$> docker network create -d overlay demo
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Next, create the initial service:

$> docker service create \
    --name demo \
    --network demo \
    --detach=false \
    --label com.docker.lb.hosts=demo.local \
    --label com.docker.lb.port=8080 \
    --label com.docker.lb.context_root=/app \
    --label com.docker.lb.context_root_rewrite=true \
    --env METADATA="demo-context-root" \
    ehazlett/docker-demo

Only one path per host

Interlock only supports one path per host per service cluster. When a specific com.docker.lb.hosts label is applied, it cannot be applied again in the same service cluster.

Interlock detects when the service is available and publishes it. After tasks are running and the proxy service is updated, the application is available via http://demo.local:

$> curl -vs -H "Host: demo.local" http://127.0.0.1/app/
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 80 (#0)
> GET /app/ HTTP/1.1
> Host: demo.local
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: nginx/1.13.6
< Date: Fri, 17 Nov 2017 14:25:17 GMT
< Content-Type: text/html; charset=utf-8
< Transfer-Encoding: chunked
< Connection: keep-alive
< x-request-id: 077d18b67831519defca158e6f009f82
< x-proxy-id: 77c0c37d2c46
< x-server-info: interlock/2.0.0-dev (732c77e7) linux/amd64
< x-upstream-addr: 10.0.1.3:8080
< x-upstream-response-time: 1510928717.306
...
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