Let oryx backend by srs origin cluster

[suzp1984]

Purpose

Make a single docker image that let Oryx backend by srs origin cluster.
@see https://ossrs.net/lts/en-us/docs/v7/doc/origin-cluster

How to make a docker image?

docker build -t [your repo]/oryx:[tag] -f Dockerfile.origin_cluster .

How to run this image by config the count of origin srs instances?

Config the SRS instance count by env ORIGIN_SRS_NUMBER, the default number is 2.
e.g. Your docker container has capacity of 6 cpu cores, you want to run 4 SRS origin instances.
Let's assume your image name is oryx:origin_cluster, built from above step.

docker run -it --rm --name oryx -p 80:2022 -p 443:2443 -p 1935:1935 -p 8000:8000/udp -p 10080:10080/udp -e ORIGIN_SRS_NUMBER=4 oryx:origin_cluster

TODO

• replace the images inside Dockerfile.origin_cluster: zpcat/srs-proxy, zpcat/srs:7-dev

zpcat/srs-proxy is the srs-proxy docker image, check ossrs/srs#4184
zpcat/srs:7-dev is build from latest srs source code, the official srs image need to update.