compose2kube

compose2kube

Convert docker-compose service files to Kubernetes objects.

Status

compose2kube is in the prototype stage and only supports mapping container images, ports, and restart policies to Kubernetes replication controllers. Thanks to the docker/libcompose library, compose2kube will support the complete docker-compose specification in the near future.

Build

go build .

Usage

Create a docker-compose.yml file

web:
  image: nginx
  ports:
    - "80"
    - "443"
database:
  image: postgres
  ports:
    - "5432"
cache:
  image: memcached
  ports:
    - "11211"

Test the service using the docker-compose command:

docker-compose up -d

List the running services:

docker-compose ps

Stop the services:

docker-compose stop

Remove the services:

docker-compose rm

At this point the docker-compose.yml file is ready for conversion.

docker-compose to Kubernetes

Use the compose2kube command to convert docker-compose.yml to native Kubernetes objects.

$ compose2kube -compose-file docker-compose.yml -output-dir output

output/cache-rc.yaml
output/database-rc.yaml
output/web-rc.yaml

Launch the Kubernetes replication controllers

$ kubectl create -f output/

replicationcontrollers/cache
replicationcontrollers/database
replicationcontrollers/web

List the replication controllers:

$ kubectl get rc

CONTROLLER   CONTAINER(S)   IMAGE(S)    SELECTOR           REPLICAS
cache        cache          memcached   service=cache      1
database     database       postgres    service=database   1
web          web            nginx       service=web        1

View the service pods:

$ kubectl get pods

NAME                             READY     STATUS    RESTARTS   AGE
cache-i3az8                      1/1       Running   0          6h
database-jq2lr                   1/1       Running   0          6h
kube-controller-172.16.238.141   4/4       Running   0          6h
web-1vj6h                        1/1       Running   0          6h