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oopsie

Go Report Card Gitter

Oopsie [/ˈuːpsi/] is a Kubernetes controller that watches all Events within a cluster and enriches failed objects with solutions found on StackOverflow (Github and other sources coming soon).

recording

Why Oopsie?

Kubernetes is a great tool for orchestrating containerized workloads on a fleet of machines. Unfortunatelly, it is sometimes not that easy for new Kubernetes users to resolve problems which occur in their deployments. The illustration below is a visual representation of what happens when you deploy your first application after having mastered the Wordpress and Guestbook examples.

Oopsie helps you, the people on Slack or community mailing lists, save time by answering questions to problems which already have been solved.

Usage

You can install oopsie with GO111MODULE="on" go get github.com/afritzler/oopsie.

NOTE: please use the latest go to do this, ideally go 1.13 or greater.

This will put oopsie in $(go env GOPATH)/bin. If you encounter the error oopsie: command not found after installation then you may need to either add that directory to your $PATH as shown here or do a manual installation by cloning the repo and run make build from the repository.

mkdir -p $GOPATH/src/github.com/afritzler && cd $GOPATH/src/github.com/afritzler/
git clone https://github.com/afritzler/oopsie.git
cd oopsie
make build

Alternatively you can build the oopsie binary using a Docker container

make docker-build

In order to use oopsie you will need to point KUBECONFIG to the path kubeconfig of your Kubernetes cluster.

If you have a kind based cluster running, you can set the KUBECONFIG prior to running oopsie.

export KUBECONFIG=$(kind get kubeconfig-path)

For Minikube based setup the kubeconfig is typically located under ~/.kube/config.

Now it's time to start the oopsie controller.

oopsie

Now lets brake something by creating a broken deployment on our cluster.

kubectl apply -f https://raw.githubusercontent.com/afritzler/oopsie/master/examples/nginx-broken.yaml

kubectl should give us the follwing output

NAME                                READY   STATUS         RESTARTS   AGE
nginx-deployment-6b75cdff69-f6hkg   0/1     ErrImagePull   0          10s

If we now look at the events of our broken pod

kubectl describe pod nginx-deployment-6b75cdff69-f6hkg

you should see the following output

Events:
  Type     Reason     Age   From                         Message
  ----     ------     ----  ----                         -------
  Normal   Scheduled  8s    default-scheduler            Successfully assigned default/nginx-deployment-6b75cdff69-f6hkg to kind-control-plane
  Normal   Pulling    7s    kubelet, kind-control-plane  Pulling image "afritzler/nginx:1.17.6"
  Warning  Failed     5s    kubelet, kind-control-plane  Failed to pull image "afritzler/nginx:1.17.6": rpc error: code = Unknown desc = failed to resolve image "docker.io/afritzler/nginx:1.17.6": no available registry endpoint: pull access denied, repository does not exist or may require authorization: server message: insufficient_scope: authorization failed
  Warning  Failed     5s    kubelet, kind-control-plane  Error: ErrImagePull
  Normal   BackOff    5s    kubelet, kind-control-plane  Back-off pulling image "afritzler/nginx:1.17.6"
  Warning  Failed     5s    kubelet, kind-control-plane  Error: ImagePullBackOff
  Normal   Hint       3s    StackOverflow                For error 'Error: ErrImagePull' I found something here -> https://stackoverflow.com/questions/48832017/minikube-error-errimagepull
  Normal   Hint       3s    StackOverflow                For error 'Error: ImagePullBackOff' I found something here -> https://stackoverflow.com/questions/46002478/error-imagepullbackoff-when-scaling-working-deployment-kubernetes

Follow now the provided SackOverflow links which hopefully help you to resolve your issue. Since oopsie is observing all events inside your cluster you might also want to look into the events of other objects such as node, pv, etc.

Status and Future Work

This is the very first version of oopsie and currently only has one provider implemented to generate hint events. In the future I plan to look into the following topics:

  • Github provider to provide references to Github Issues
  • Use NLP techniques (tokenization/entity extraction) to improve search results
  • In-cluster operations documentation

Feedback and Support

Feedback and contributions are always welcome! Feel free to open an issue in case you hit any road bumps.