container-transform is a small utility to transform various docker container formats to one another.

Currently, container-transform can parse and convert:

• Kubernetes Pod specs
• ECS task definitions
• Docker-compose configuration files
• Marathon Application Definitions or Groups of Applications
• Chronos Task Definitions

and it can output to:

• Systemd unit files

$ cat docker-compose.yaml
version: '2'
services:
 etcd:
 cpu_shares: 102.4
 entrypoint: /usr/local/bin/etcd -data-dir /var/etcd/data -listen-client-urls http://127.0.0.1:2379,http://127.0.0.1:4001
 -advertise-client-urls http://127.0.0.1:2379,http://127.0.0.1:4001 -initial-cluster-token
 skydns-etcd
 image: gcr.io/google_containers/etcd-amd64:2.2.1
 mem_limit: 524288000b
 healthz:
 command: -cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null
 -port=8080
 cpu_shares: 10.24
 image: gcr.io/google_containers/exechealthz:1.0
 mem_limit: 20971520b
 ports:
 - '8080'
 kube2sky:
 command: --kubecfg-file=/etc/kubernetes/worker-kubeconfig.yaml --domain=cluster.local
 cpu_shares: 102.4
 image: gcr.io/google_containers/kube2sky:1.14
 mem_limit: 209715200b
 volumes:
 - /usr/share/ca-certificates:/etc/ssl/certs
 - /etc/kubernetes/worker-kubeconfig.yaml:/etc/kubernetes/worker-kubeconfig.yaml:ro
 - /etc/kubernetes/ssl:/etc/kubernetes/ssl:ro
 skydns:
 command: -machines=http://127.0.0.1:4001 -addr=0.0.0.0:53 -ns-rotate=false -domain=cluster.local.
 cpu_shares: 102.4
 image: gcr.io/google_containers/skydns:2015年10月13日-8c72f8c
 mem_limit: 209715200b
 ports:
 - 53/udp
 - '53'
$ container-transform -i compose -o kubernetes docker-compose.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 labels:
 app: null
 version: latest
 name: null
 namespace: default
spec:
 replicas: 1
 selector:
 matchLabels:
 app: null
 version: latest
 template:
 metadata:
 labels:
 app: null
 version: latest
 spec:
 containers:
 - command:
 - /usr/local/bin/etcd
 - -data-dir
 - /var/etcd/data
 - -listen-client-urls
 - http://127.0.0.1:2379,http://127.0.0.1:4001
 - -advertise-client-urls
 - http://127.0.0.1:2379,http://127.0.0.1:4001
 - -initial-cluster-token
 - skydns-etcd
 image: gcr.io/google_containers/etcd-amd64:2.2.1
 name: etcd
 resources:
 limits:
 cpu: 100.0m
 memory: 500Mi
 - args:
 - -cmd=nslookup
 - kubernetes.default.svc.cluster.local
 - 127.0.0.1
 - '>/dev/null'
 - -port=8080
 image: gcr.io/google_containers/exechealthz:1.0
 name: healthz
 ports:
 - containerPort: 8080
 protocol: TCP
 resources:
 limits:
 cpu: 10.0m
 memory: 20Mi
 - args:
 - --kubecfg-file=/etc/kubernetes/worker-kubeconfig.yaml
 - --domain=cluster.local
 image: gcr.io/google_containers/kube2sky:1.14
 name: kube2sky
 resources:
 limits:
 cpu: 100.0m
 memory: 200Mi
 volumeMounts:
 - mountPath: /etc/ssl/certs
 name: usr-share-ca-certificates
 - mountPath: /etc/kubernetes/worker-kubeconfig.yaml
 name: etc-kubernetes-worker-kubeconfig.yaml
 readOnly: true
 - mountPath: /etc/kubernetes/ssl
 name: etc-kubernetes-ssl
 readOnly: true
 - args:
 - -machines=http://127.0.0.1:4001
 - -addr=0.0.0.0:53
 - -ns-rotate=false
 - -domain=cluster.local.
 image: gcr.io/google_containers/skydns:2015年10月13日-8c72f8c
 name: skydns
 ports:
 - containerPort: 53
 protocol: UDP
 - containerPort: 53
 protocol: TCP
 resources:
 limits:
 cpu: 100.0m
 memory: 200Mi
 volumes:
 - hostPath:
 path: /etc/kubernetes/ssl
 name: etc-kubernetes-ssl
 - hostPath:
 path: /etc/kubernetes/worker-kubeconfig.yaml
 name: etc-kubernetes-worker-kubeconfig.yaml
 - hostPath:
 path: /usr/share/ca-certificates
 name: usr-share-ca-certificates

$ cat docker-compose.yml | container-transform -v
{
 "family": "python-app",
 "volumes": [
 {
 "name": "host_logs",
 "host": {
 "sourcePath": "/var/log/myapp"
 }
 }
 ],
 "containerDefinitions": [
 {
 "memory": 1024,
 "image": "postgres:9.3",
 "name": "db",
 "essential": true
 },
 {
 "memory": 128,
 "image": "redis:latest",
 "name": "redis",
 "essential": true
 },
 {
 "name": "web",
 "memory": 64,
 "command": [
 "uwsgi",
 "--json",
 "uwsgi.json"
 ],
 "mountPoints": [
 {
 "sourceVolume": "host_logs",
 "containerPath": "/var/log/uwsgi/"
 }
 ],
 "environment": [
 {
 "name": "AWS_ACCESS_KEY_ID",
 "value": "AAAAAAAAAAAAAAAAAAAA"
 },
 {
 "name": "AWS_SECRET_ACCESS_KEY",
 "value": "1111111111111111111111111111111111111111"
 }
 ],
 "essential": true
 }
 ]
}
Container web is missing required parameter "image".
Container web is missing required parameter "cpu".

Usage: container-transform [OPTIONS] [INPUT_FILE]
 container-transform is a small utility to transform various docker
 container formats to one another.
 Default input type is compose, default output type is ECS
 Default is to read from STDIN if no INPUT_FILE is provided
 All options may be set by environment variables with the prefix "CT_"
 followed by the full argument name.
Options:
 -i, --input-type [ecs|compose|marathon|chronos|kubernetes]
 -o, --output-type [ecs|compose|systemd|marathon|chronos|kubernetes]
 -v, --verbose / --no-verbose Expand/minify json output
 -q, --quiet Silence error messages
 --version Show the version and exit.
 -h, --help Show this message and exit.

To get the docker image, run:

docker pull micahhausler/container-transform:latest

To run the docker image:

docker run --rm -v $(pwd):/data/ micahhausler/container-transform docker-compose.yml
# or
cat docker-compose.yml | docker run --rm -i micahhausler/container-transform

To install the latest release (Python 3 only), type:

pip install container-transform

To install the latest code directly from source, type:

pip install git+git://github.com/micahhausler/container-transform.git

Full documentation is available at http://container-transform.readthedocs.org

MIT License (see LICENSE)