hauxir / Imgpush

Features

• One simple API endpoint for uploading images
• Automatic Conversion to an image format of your choice
• Automatic resizing to any size of your liking
• Built-in Rate limiting
• Built-in Allowed Origin whitelisting
• Liveness API

Usage

Uploading an image:

> curl -F '[email protected]/some/file.jpg' http://some.host
{"filename":"somename.png"}

Fetching a file in a specific size(e.g. 320x240):

http://some.host/somename.png?w=320&h=240

returns the image cropped to the desired size

Running

imgpush requires docker

docker run -v <PATH TO STORE IMAGES>:/images -p 5000:5000 hauxir/imgpush:latest

Kubernetes

This is fully optional and is only needed if you want to run imgpush in Kubernetes.

If you want to deploy imgpush in Kubernetes, there is an example deployment available in the Kubernetes directory. In case you do not have a running Kubernetes cluster yet, you can use Minikube to setup a local single-node Kubernetes cluster. Otherwise you can just use your existing cluster.

1. Verify that your cluster works:

$ kubectl get pods
# Should return without an error, maybe prints information about some deployed pods.

2. Apply the kubernetes/deployment-example.yaml file:

$ kubectl apply -f kubernetes/deployment-example.yaml
namespace/imgpush created
deployment.apps/imgpush created
persistentvolumeclaim/imgpush created
service/imgpush created

3. It will take a moment while your Kubernetes downloads the current imgpush image.
4. Verify that the deployment was successful:

$ kubectl -n imgpush get deployments.
NAME      READY   UP-TO-DATE   AVAILABLE   AGE
imgpush   1/1     1            1           3m41s

$ kubectl -n imgpush get svc
NAME      TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)    AGE
imgpush   ClusterIP   10.10.10.41   <none>        5000/TCP   3m57s

5. When the deployment is finished, the READY column should be 1/1.
6. Afterwards you can forward the port to your local machine and upload an image via your webbrowser (visit http://127.0.0.1:5000/).

$ kubectl -n imgpush port-forward service/imgpush 5000
Forwarding from 127.0.0.1:5000 -> 5000
Handling connection for 5000
Handling connection for 5000
Handling connection for 5000
Handling connection for 5000

7. To expose imgpush to the internet you need to configure an Ingress. The exact configuration depends on you cluster but you can find an example in the kubernetes/deployment-example.yaml file that you can adapt to your setup.

Liveness

imgpush provides the /liveness endpoint that always returns 200 OK that you can use for docker Healthcheck and kubernetes liveness probe.

For Docker, as curl is install in the image :

healthcheck:
    start_period: 0s
    test: ['CMD-SHELL', 'curl localhost:5000/liveness -s -f -o /dev/null || exit 1']
    interval: 30s

For Kubernetes

livenessProbe:
    httpGet:
    path: /liveness
    port: 5000            
    initialDelaySeconds: 5
    periodSeconds: 30

Configuration

Setting configuration variables is all set through env variables that get passed to the docker container.

Example:

docker run -e ALLOWED_ORIGINS="['https://a.com', 'https://b.com']" -s -v <PATH TO STORE IMAGES>:/images -p 5000:5000 hauxir/imgpush:latest

or to quickly deploy it locally, run

docker-compose up -d