Splitting envoy envoy.yaml configuration into multiple files (Docker only)

I am handling four different ports / cases with Envoy:

• IPv6 http
• IPv4 http
• IPv6 https
• IPv4 https

For IPv6 and IPv4 the configuration is the same, whereas for http there is a different configuration than for https.

To realize this, I have split my envoy configuration into several snippets, and add them together during building of the container.

Here is what my new Dockerfile looks like:

FROM envoyproxy/envoy:latest
COPY config /tmp/config
RUN cat /tmp/config/envoy_head.yaml /tmp/config/http_head_one.yaml /tmp/config/http_body.yaml /tmp/config/http_head_two.yaml /tmp/config/http_body.yaml /tmp/config/https_head_one.yaml /tmp/config/https_body.yaml /tmp/config/https_head_two.yaml /tmp/config/https_body.yaml /tmp/config/envoy_tail.yaml > /etc/envoy/envoy.yaml

my config folder contains several files which are combined into envoy.yaml

No need to search for “how to include files in yaml files”

Here is, for example, my envoy_head.yaml:

static_resources:
   listeners:

As you can see, it is rather simple

(NB: it ends with a newline, as do all the other files – when combining, this will give the desired result).

Don’t forget to build your container, running, for example:

docker-compose up –build